International Association of Advanced Materials
Advanced Materials Proceedings
2002-4428
2
11
2017
11
01
Dielectric and electrical properties of hexagonal BaTi<sub>0.5</sub>Co<sub>0.5</sub>O<sub>3</sub> ceramic with NTC effect
680
681
16274
10.5185/amp.2017/521
EN
K.
Samuvel
Department of Physics, Faculty of Engineering and Technology, Vadapalani Campus, SRM University,
Chennai 600026, Tamilnadu, India
K.
Ramachandran
Department of Physics, Faculty of Engineering and Technology, Vadapalani Campus, SRM University,
Chennai 600026, Tamilnadu, India
V.
Ratchagar
Department of Physics, Faculty of Engineering and Technology, Vadapalani Campus, SRM University,
Chennai 600026, Tamilnadu, India
G.
Ravi
Department of Physics, Faculty of Science and Humanity, Dr. Pauls Nagar, Vanur Taluk,
Villupuram 605109, Tamilnadu, India
Journal Article
2021
12
09
Barium Titanate doped with Cobalt is known for both its electric and magnetic properties. The synthesis and characterization of Cobalt doped barium titanate; BaTi<sub>1-x</sub>Co<sub>x</sub>O<sub>3</sub>(BTCO) x = 0.5was investigated with a view to understand its structural, magnetic and electrical properties. A finest possible sample of Co doped micro particles of BaTiO<sub>3</sub> (BTO) with possible tetragonal structure via a solid-state route was prepared. Prepared samples of BaTi<sub>1-x</sub>Co<sub>x</sub>O<sub>3 </sub>(BTCO) were structural characterized by X-ray diffraction (XRD). The dielectric constant measurements of the samples were carried out at 1Hz to<br />1 MHz Vibrating Sample Magnetometer (VSM) measurements revealed the magnetic nature of Cobalt doped BaTiO<sub>3</sub>. Ferroelectric hysteresis loop traced at the electric field in-between -15 to +15 (KV/cm). The relaxation phenomena that take place cane be attributable to the damping of dipole oscillator due to the application of external field. The impedance measurements were done up to 473 K in order to separate grain (bulk) and grain boundary contributions. The FESEM micrographs show proper grain growth and EDAX confirmed the presence of all the elements in samples. In the present study, various electrical properties of barium titanate based ceramics were explained and examples of the relevant applications were given. Copyright © 2017 VBRI Press.<br />
https://amp.iaamonline.org/article_16274_b7ce53aaf57f34e100af5ea5d8b022b9.pdf
International Association of Advanced Materials
Advanced Materials Proceedings
2002-4428
2
11
2017
11
01
Structural and optical behavior of Y<sub>2</sub>O<sub>3</sub> nanocrystallites synthesized by sol-gel technique
687
690
16275
10.5185/amp.2017/631
EN
Rachna
Ahlawat
Department of Physics, Materials Science Lab., Ch. Devi Lal University, Sirsa 125055, Haryana, India
Journal Article
2021
12
09
Y<sub>2</sub>O<sub>3</sub> nanocrystallite has been successfully synthesized by sol-gel technique. Y(NO<sub>3</sub>)<sub>3</sub>.4H<sub>2</sub>O and TEOS were used as precursors and obtained powdered form of the oxide. In this study, stepwise annealing process has been performed and obtained almost spherical Y<sub>2</sub>O<sub>3</sub> nanocrystallites. As-prepared sample was annealed at 900°C and their comparison has been studied in detail. Structural investigations of the prepared nanocrystallites were carried out by XRD and TEM. Optical behavior of the sample was investigated using UV-Vis absorption spectra. Also, band gap energy Eg = 5.9 eV has been calculated using Tauc’s plot. It is expected that the studies of these phenomena would open a new vistas of energy conversion devices and high speed optoelectronic instrumentation. Copyright © 2017 VBRI Press.
https://amp.iaamonline.org/article_16275_d6f880d73c35662fc4cf7c9a54cd7bac.pdf
International Association of Advanced Materials
Advanced Materials Proceedings
2002-4428
2
11
2017
11
01
Study of transition regime for amorphous to nano-crystalline silicon thin films using 27.12 MHz PECVD: Insight into plasma kinetics
691
696
16276
10.5185/amp.2017/644
EN
Deepika
Chaudhary
Network of Institutes for Solar Energy (CSIR-NISE), Physics of Energy Harvesting Division, CSIR – National Physical Laboratory, New Delhi 110012, India
Academy of Scientific and Innovative Research (AcSIR), CSIR-NPL Campus, New Delhi, Dr. K. S. Krishnan Marg, New Delhi 110012, India
Mansi
Sharma
Network of Institutes for Solar Energy (CSIR-NISE), Physics of Energy Harvesting Division, CSIR – National Physical Laboratory, New Delhi 110012, India
Academy of Scientific and Innovative Research (AcSIR), CSIR-NPL Campus, New Delhi, Dr. K. S. Krishnan Marg, New Delhi 110012, India
S.
Sudhakar
Network of Institutes for Solar Energy (CSIR-NISE), Physics of Energy Harvesting Division, CSIR – National Physical Laboratory, New Delhi 110012, India
Sushil
Kumar
Network of Institutes for Solar Energy (CSIR-NISE), Physics of Energy Harvesting Division, CSIR – National Physical Laboratory, New Delhi 110012, India
Academy of Scientific and Innovative Research (AcSIR), CSIR-NPL Campus, New Delhi, Dr. K. S. Krishnan Marg, New Delhi 110012, India
Journal Article
2021
12
09
In this article, we report the phase transition region of hydrogenated amorphous (a-Si:H) to nano-crystalline (nc-Si:H) silicon thin films deposited using 27.12 MHz assisted Plasma Enhanced Chemical vapor Deposition (PECVD) process with the approach of plasma diagnosis. This work presents for the first time a study of plasma characteristics using Impedance Analyser (V/I probe) at various applied power (4 W - 40 W), though till now this apparatus has been utilized only to analyse the applied delivered power during processing. On the basis of plasma diagnose, optimum bulk field (5 V/cm); sheath field (1376 V/cm) and minimum sheath width (7.4 x 10<sup>-4 </sup>cm) observed at 20 W power which provides a visible mark of transition from a-Si:H to nc-Si:H. On account of plasma properties, the deposition was carried out by considering the plasma-surface interaction during growth. The microstructure of the deposited films was characterized using Raman spectra, UV-Vis spectra and conductivity measurements and they were found to be well correlating with the evaluated plasma characteristics. In particular, it was found that at applied power near to the onset of transition regime i.e. at 10 W, preeminent properties of a-Si:H film was observed, predominantly in terms of highest photosensitivity (7.2x10<sup>3</sup>), low photo-degradation and high deposition rate (~1.39 Å/s). On the other hand, volume fraction of crystallites (24 %), wider band gap (2.0 eV) and no photo-degradation observed for the film deposited at 20 W applied power which signifies the existence of crystallites in an amorphous matrix. Copyright © 2017 VBRI Press.
https://amp.iaamonline.org/article_16276_cfdb5342935a40a39d90b54bcf9b6fa7.pdf
International Association of Advanced Materials
Advanced Materials Proceedings
2002-4428
2
11
2017
11
01
Synthesis of ZnO nanoparticles and its application in adsorption
697
703
16277
10.5185/amp/2017/696
EN
Karuna
Nalwa
Dr SSBUICET, Panjab University, Chandigarh, 160014, India
Anupama
Thakur
Dr SSBUICET, Panjab University, Chandigarh, 160014, India
Neeta
Sharma
Dr SSBUICET, Panjab University, Chandigarh, 160014, India
Journal Article
2021
12
09
In the present study nanoparticles of zinc oxide (ZnO) were synthesized by simple solution based approach and used as an adsorbent for the removal of Cu(II) ions from aqueous solution. ZnO nanoparticles were characterized by <em>X</em>-Ray Diffraction (XRD), Transmission Electron Microscopy (TEM) and Dynamic Light Scattering (DLS). TEM confirmed the formation of zinc oxide nanoparticles in the size range of 10-11 nm. Adsorption capacity of ZnO for removing Cu(II) ions from aqueous solutions was investigated at different pH, as a function of contact time, metal ion concentration and the amount of adsorbent. Moreover, adsorption isotherms and kinetics was studied to understand the nature and mechanism of adsorption. A high percentage removal (98.71%) of Cu(II) from its aqueous solutions at pH 5 and at initial heavy metal ion concentration of 300 mg/l by ZnO particles was achieved. The adsorption isotherm was well described by Freundlich isotherm model<br />(<em>R</em><sup>2</sup>= 0.999). The adsorption kinetics data was well fitted by the pseudo-second-order rate model with a high regression coefficient. The above results suggest that ZnO nanoparticles can be used as potential adsorbent for the efficient removal of heavy metals from aqueous solutions. Copyright © 2017 VBRI Press
https://amp.iaamonline.org/article_16277_3737fbec7e6b4d7be8b1fa84be363434.pdf
International Association of Advanced Materials
Advanced Materials Proceedings
2002-4428
2
11
2017
11
01
Sulfonated graphene – An efficient cationic dye adsorbent in aqueous solution
704
710
16278
10.5185/amp.2018/728
EN
Smriti
Arora
Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110 007, India
Ritika
Nagpal
Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110 007, India
Sweta
Mishra
Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110 007, India
SMS
Chauhan
Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110 007, India
Journal Article
2021
12
09
A fast, sensitive, label-free, and organic cationic dye adsorbent has been developed by hydrothermal sulfonation reaction on reduced graphene oxide. The layered graphene sheet provides a significant surface area, high intrinsic mobility while presence of –SO3H groups on both sides of sheet render strong hydrophilicity and good dispersibility in water. The dye adsorption process is followed using UV–Visible spectroscopy, while the material before and after adsorption has been characterized by Raman, Powder XRD, FT-IR, TGA, TEM, SEM analysis. Optimum experimental parameters were determined to be acidic for Rhodamine B (RB) and basic for Methylene Blue (MB), temperature 30°C, adsorbent dosage<br />50 mg/L. The sorption equilibrium data were modeled using various isotherms, where the data best fitted to Freundlich isotherm for RB (q<sub>max </sub>= 76.68 mg/g), while Langmuir isotherm for MB (q<sub>max </sub>= 564.97 mg/g). The results indicate that the heterogeneous adsorbent can be applied for efficient dye removal from industrial effluent and contaminated natural water. Copyright © 2017 VBRI Press.
https://amp.iaamonline.org/article_16278_e4665472f1999e17ea25891f8ce6a9f9.pdf
International Association of Advanced Materials
Advanced Materials Proceedings
2002-4428
2
11
2017
11
01
Amalgamation of nano carbon for the advancement of the performance in mechanical properties of the concrete: A cementitious material
711
715
16279
10.5185/amp.2017/732
EN
Hitesh
R. Ashani
Department of Civil Engineering, Shri Jagdishprashad Jhabarmal Tibrewala University, Jhunjhunu, 333001, India
Sachin
P. Parikh
2Department of Chemical Engineering, V.V.P. Engineering College, Gujarat Technological University,
Gandhinagar, 382028, India
Jaysukh
H. Markna
Department of Nano Technology, V.V.P. Engineering College, Gujarat Technological University,
Gandhinagar, 382028, India
Journal Article
2021
12
09
Nanotechnology is considered as one of the active research area of 21st century due to its increasing economic importance and ability to study the material at nano scale to improve its behavior in construction industry. Concrete the second highest consume commodity on the planet after water is highly heterogeneous material with thumping performance challenges on it. Demand of concrete is increasing due to increasing demand for infrastructure development, rapid urbanization, rapid industrial development, population growth, economic development of the nation etc. A little diminution in the number of problems related with concrete would add up to noteworthy recital enhancement and economic benefits to society and nation. In the present communication, the cement one of the main ingredient of concrete was replaced with a range of<br />5%, 10%, 15% and 20 % of the weight of cement by nano carbon material to study the effect on the mechanical properties like – compressive strength, surface hardness, water absorption, consistency, morphology on nano carbon concrete specimen. A rapport was made between standard and nano carbon black concrete specimen to arrive at a legitimate conclusion that improvement in the mechanical properties like strength, hardness, compactness etc. and C-S-H gel structure is obtained. Copyright © 2017 VBRI Press.
https://amp.iaamonline.org/article_16279_ebd9051795b9b32d879210c63bb726c7.pdf
International Association of Advanced Materials
Advanced Materials Proceedings
2002-4428
2
11
2017
11
01
Synthesis and Optimization of low-cost and high efficient Zirconium-aluminium modified iron oxide nano adsorbent for fluoride removal from drinking water
716
724
16280
10.5185/amp.2017/743
EN
Mrinal
K Adak
Department of Chemistry, Sidho-Kanho-Birsha University, Purulia 723104, West Bengal, India
Sujoy
Chakraborty
Department of Chemistry, Sidho-Kanho-Birsha University, Purulia 723104, West Bengal, India
Shrabanee
Sen
Piezo-Ceramic Division, Central Glass and Ceramics Research Institute, Kolkata, West Bengal, India
Debasis
Dhak
Department of Chemistry, Sidho-Kanho-Birsha University, Purulia 723104, West Bengal, India
Journal Article
2021
12
09
Zirconium-aluminium modified iron oxide nano adsorbent was synthesized using chemical route using zirconyl nitrate, aluminium nitrate, ferric nitrate and triethanol amine. The precursor materials were calcined at 900<sup>o</sup>C for 4 h to obtain a carban free nano-adsorbent. XRD of the calcined powder was performed to detect the phase and to estimate the crystallite size. Fluoride removal tests were performed using synthesized fluorinated aqueous solutions of 3 ppm, 5 ppm and 10 ppm. The adsorbent dose was considered 15 mints, 30 mints, 45 mints and 60 mints while adsorbent dose were varied from<br />0.1 mg to 0.3 mg for every 100 ml fluorinated aqueous solution. FTIR spectroscopy of the nano-adsorbent was studied before and after fluoride removal. Percentage of fluoride removal was checked for at least three cycles using the same adsorbent. Fluoride concentration of treated aqueous solution was studied using UV-Visible spectrometer using standard zirconium alizarin S solution. Maximum % of fluoride removal was observed up to 99.9% for an adsorbent dose 0.3 mg for a contact time of 15 minutes at 3 ppm fluoride concentration. However, the adsorbent dose for highest % of fluoride removal depends highly on the contact time and initial fluoride concentration and they were found to be very selective. The synthesized nano-sdsorbent could be used commercially for effective fluoride removal from fluorinated water for drinking purpose. Copyright © 2017 VBRI Press.<br />
https://amp.iaamonline.org/article_16280_ce2f49c50b9a6cb41af04bfa5c42665d.pdf
International Association of Advanced Materials
Advanced Materials Proceedings
2002-4428
2
11
2017
11
01
Thickness mod ulated structural and photo-luminescence properties of magnetron sputtered nanocrystalline SiC ultrathin films
725
728
16281
10.5185/amp.2017/782
EN
Narendra
Singh
Functional Nanomaterials Research Lab, Department of Physics and Centre for Nanotechnology,
Indian Institute of Technology Roorkee, Roorkee 247667, India
Davinder
Kaur
Functional Nanomaterials Research Lab, Department of Physics and Centre for Nanotechnology,
Indian Institute of Technology Roorkee, Roorkee 247667, India
Journal Article
2021
12
09
Ultrathin silicon carbide (SiC) films were grown on p type Si (100) substrate by RF magnetron sputtering at constant substrate temperature of 700<sup>0</sup>C for investigating thickness dependence of structural and photoluminescence properties. The structural and Photoluminescence properties were measured by X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and photospectrometer respectively. X-ray diffraction pattern revealed (102) and dominant (105) reflections which corresponds to 4H-SiC and an enhancement in (105) peak intensity with increasing thickness was also observed. The thickness measured by X-ray reflectometry (XRR) reduces from ~ 46 nm to 12 nm by decreasing deposition time (40-10 minute) which in turn reduces the crystallite size. Photoluminescence spectra show a broad peak extending from ultraviolet to blue region centered at ~ 385 nm for film of thickness ~ 46 nm (deposition time 40 min). A shifting in Photoluminescence peak towards shorter wavelength (blue shift) with decreasing SiC ultrathin film thickness was observed, which could be attributed to quantum confinement effect. The improved Photoluminescence in ultrathin nanocrystalline SiC films could make it a potential candidate in optoelectronic and biomedical applications. Copyright © 2017 VBRI Press.
https://amp.iaamonline.org/article_16281_29e9ba147f58d98b6a92fc2f80df6ba9.pdf
International Association of Advanced Materials
Advanced Materials Proceedings
2002-4428
2
11
2017
11
01
Synthesis of nanosized BaCeO<sub>3</sub> from oxalate precursor
729
733
16282
10.5185/amp.2017/854
EN
Udayraj
C. Yadav
Department of Chemistry, The Institute of Science, 15, Madam Cama Road, Mumbai 400032, India
Yuvraj S.
Malghe
Department of Chemistry, The Institute of Science, 15, Madam Cama Road, Mumbai 400032, India
Journal Article
2021
12
09
Nanosized barium cerate (BaCeO<sub>3</sub>) was prepared from barium cerium oxalate (BCO) precursor. Thermal decomposition of BCO precursor was studied using thermogravimetry(TG), differential thermal analysis (DTA), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) techniques. BCO precursor calcined at 1000°C for 2h gives nanosized BaCeO<sub>3</sub> powder. Band gap of BaCeO<sub>3 </sub>was estimated using diffuse reflectance spectrophotometry and is found to be<br />2.17 eV. Particle size distribution study reveals that particle size of BaCeO<sub>3</sub>varies between 10-70 nm. Dielectric behavior of BaCeO<sub>3</sub> was studied with varying the temperature at different frequencies. BaCeO<sub>3</sub> shows good dielectric and conductivity response. Copyright © 2017 VBRI Press.<br />
https://amp.iaamonline.org/article_16282_2b5b3c48f8d1f18dcf43877ae37c5d32.pdf
International Association of Advanced Materials
Advanced Materials Proceedings
2002-4428
2
11
2017
11
01
Critical assessment of strengthening mechanism of magnesium alloys: Review
734
744
16283
10.5185/amp.2017/859
EN
Brijesh
Prasad
Graphic Era University, Dehradun, 248001, India
Bhingole
P P
Graphic Era University, Dehradun, 248001, India
Institute of Infrastructure, Technology, Research and Management (IITRAM), Ahmadabad, 380026 India
Journal Article
2021
12
09
Magnesium and its alloys have got great attention in recent times due to its potential to replace heaver alloys with equal strengths and lighter in weight, hence become potential materiel automobile, sports, aeronautical and biomaterials applications This study concentrates and summarizes the fundamental properties of magnesium and its alloys such as high strength, ductility non-corrosive behavior etc. Along with its developments in its physical metallurgy, forming process and strengthening mechanisms to enhance the mechanical strength followed by behavior of magnesium alloys under different working conditions and applications. A brief overview of the recent and systematic outline is reported for improvement of mechanical by strengthening mechanism along with its applications. This work would be very much helpful for the researchers to find the best strengthening method on looking on its various aspects of design, environment friendly behavior and optimum utilization of resources with saving the natural resources. Copyright © 2017 VBRI Press.
https://amp.iaamonline.org/article_16283_4c08fb35dfb18f31aeb3ffb80da4ba4e.pdf
International Association of Advanced Materials
Advanced Materials Proceedings
2002-4428
2
11
2017
11
01
A novel aqueous Li<sub>4</sub>Fe(CN)<sub>6</sub> cathode and hydrophobic ionic liquid electrolyte combined lithium-ion battery
745
748
16284
10.5185/amp.2017/588
EN
Bikash
Mandal
Electrochemistry Laboratory, Department of Chemistry, Visva-Bharati (A Central University),
Santiniketan 731235, West Bengal, India
Indranarayan
Basumallick
Electrochemistry Laboratory, Department of Chemistry, Visva-Bharati (A Central University),
Santiniketan 731235, West Bengal, India
Susanta
Ghosh
Electrochemistry Laboratory, Integrated Science Education and Research Centre,
Visva-Bharati (A Central University), Santiniketan 731235, West Bengal, India
Journal Article
2021
12
09
Present study reports an easy and cost-effective method of synthesis of Li<sub>4</sub>Fe(CN)<sub>6 </sub>cathode from K<sub>4</sub>Fe(CN)<sub>6</sub>.3H<sub>2</sub>O and LiClO<sub>4</sub> in aqueous medium for its use in lithium-ion battery. The synthesized Li<sub>4</sub>Fe(CN)<sub>6 </sub>is characterized by UV-Vis, FTIR and cyclic-voltammetry studies. A special laboratory model lithium-ion battery is designed, where aqueous Li<sub>4</sub>Fe(CN)<sub>6</sub> solution acts as a cathode, metallic lithium as anode and 1 molar solution of LiPF<sub>6</sub> dissolved in water immiscible ionic liquid, 1-Butyl-3-methylimidazolium hexafluorophosphate (BMIM-PF<sub>6</sub>) as electrolyte. The cell exhibits an open circuit potential of 3.12 volt and a good charge-discharge cycling behaviour. The cell delivered a maximum discharge capacity of 86 mAhg<sup>-1</sup> (theoretical capacity 112 mAhg<sup>-1</sup>) at 0.2 C rates with an average discharge potential of 2.1 volts. Although the ionic liquid is a little bit cost intensive, but the easy synthesis methodology with the cheapest raw materials and overall cycling efficiency, makes this technology available as a green economical energy storage device in the current battery industry. Copyright © 2017 VBRI Press.
https://amp.iaamonline.org/article_16284_94a49f3be8a64e16048be00baa6a35a1.pdf
International Association of Advanced Materials
Advanced Materials Proceedings
2002-4428
2
11
2017
11
01
Enhanced dynamic mechanical properties of kenaf epoxy composites
749
757
16285
10.5185/amp.2017/981
EN
Rajnish
Kumar
School of Engineering, Gautam Buddha University, Greater Noida 201308, India
S. A. R.
Hashmi
Polymer Composite Group, CSIR-Advanced Materials and Processes Research Institute (CSIR-AMPRI),
Hoshangabad Road, Bhopal 462026, India
Subhash
Nimanpure
Polymer Composite Group, CSIR-Advanced Materials and Processes Research Institute (CSIR-AMPRI),
Hoshangabad Road, Bhopal 462026, India
Ajay
Naik
Polymer Composite Group, CSIR-Advanced Materials and Processes Research Institute (CSIR-AMPRI),
Hoshangabad Road, Bhopal 462026, India
Journal Article
2021
12
09
Randomly distributed kenaf fibre with varying length (5-50mm) and weight fractions (25-40%) were used to reinforce epoxy resin to prepare environment friendly composites. Effect of fibre length with constant fibre loading on dynamic mechanical properties was studied and its effect on storage modulus, loss modulus and damping factor were investigated. Kenaf fibres were also subjected to alkali treatment to improve interaction with the epoxy resin. The mechanical properties of composites improved with the length and loading of fibres. Tensile strength, flexural strength and impact strength of composites at 40 wt% of fibre reinforcement improved by 46, 51 and 97% as compared to the composites containing 25 wt% of kenaf fibre. It was also observed that fibre folds developed during mixing became significant factor which limited the improvement in mechanical strength of kenaf epoxy composites. A few important predictive models namely rule of mixture, Haplin-Tsai, Nielson Chen and Manera models were compared with the experimental values obtained in this present study. Manera model predicted the experimental data most accurately. Alkali treatment improved the interface and its outcome reflected in the improved modulus that increased 21.76% in samples having 10mm length of kenaf fibre. Copyright © 2017 VBRI Press.
https://amp.iaamonline.org/article_16285_84b785037a0fadcc1e37935cc9d65f69.pdf