Bulletin of Materials Science

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Study of Josephson effects in microbridges of Bi-Sr-Ca-Cu-O films made by spray pyrolysis
Bulletin of Materials Science - Tập 14 - Trang 1119-1123 - 1991
D K Walia, A K Gupta, G S N Reddy, V N Ojha, V S Tomar, Neeraj Khare, N D Kataria, K C Nagpal
Superconducting Bi-Sr-Ca-Cu-O (2212) films were prepared by spraying stoichiometric aqueous solutions of nitrates of bismuth, strontium, calcium and copper on heated MgO (100) substrates and subsequent annealing in air. TheR-T curves of the films show metallic behaviour above the superconducting transition temperature.T c (R=0) is observed betwee...... hiện toàn bộ
Synthesis and thermophysical studies of polyanilines
Bulletin of Materials Science - Tập 42 - Trang 1-9 - 2019
K S Patil, P H Zope, U T Patil, P D Patil, R S Dubey, G R Gupta
Aniline was polymerized under different experimental conditions such as interfacial polymerization, rapid mixing in hydrochloric acid medium and classical bulk polymerization method using p-toluene sulphonic acid. The resulting polyanilines were characterized by infrared, X-ray diffraction, conductance and scanning electron microscopic analysis. The main emphasis of the paper is to study the therm...... hiện toàn bộ
Macroporous silica-alumina composites with mesoporous walls
Bulletin of Materials Science - Tập 24 Số 2 - Trang 211-214 - 2001
Gautam Gundiah
Gibbs’ energy of formation of YBa2Cu3O7-x (tetragonal)
Bulletin of Materials Science - Tập 14 - Trang 983-987 - 1991
A M Azad, O M Sreedharan, K T Jacob
The high temperature ceramic oxide superconductor YBa2Cu3O7-x (1–2–3 compound) is generally synthesized in an oxygen-rich environment. Hence any method for determining its thermodynamic stability should operate at a high oxygen partial pressure. A solid-state cell incorporating CaF2 as the electrolyte and functioning under pure oxygen at a pressure of 1·01 × 105 Pa has been employ...... hiện toàn bộ
Exploring the electrochemical properties of Cu-substituted Li2CoTi3O8 as anode material for lithium-ion batteries
Bulletin of Materials Science - - 2022
Motaz G Fayed, Saad G Mohamed, Yosry F Barakat, E E El-Shereafy, M M Rashad
Spinel Li2Co1–xCuxTi3O8 nanopowders (x = 0, 0.25, 0.5 molar ratios) were synthesized via a sol–gel auto-combustion scheme. The preparation conditions like annealing temperature, Cu2+ ion substituted on the crystallinity, microstructure and chemical composition were inspected using X-ray diffraction, X-rays photoelectron spectroscopy and field emission scanning electron microscopy. Furthermore, the...... hiện toàn bộ
Systematic hardness studies on lithium niobate crystals
Bulletin of Materials Science - Tập 23 - Trang 147-150 - 2000
K. G. Subhadra, K. Kishan Rao, D. B. Sirdeshmukh
In view of discrepancies in the available information on the hardness of lithium niobate, a systematic study of the hardness has been carried out. Measurements have been made on two pure lithium niobate crystals with different growth origins, and a Fe-doped sample. The problem of load variation of hardness is examined in detail. The true hardness of LiNbO3 is found to be 630 ± 30 kg/mm2. The Fe-do...... hiện toàn bộ
On adsorption of aluminium and methyl groups on silica for TMA/H2O process in atomic layer deposition of aluminium oxide nano layers
Bulletin of Materials Science - Tập 33 - Trang 97-102 - 2010
Anu Philip, K. Rajeev Kumar
A detailed chemisorption mechanism is proposed for the atomic layer deposition (ALD) of aluminium oxide nano layers using trimethyl aluminum (TMA) and water as precursors. Six possible chemisorption mechanisms, complete ligand exchange, partial ligand exchange, simple dissociation, complete dissociation via ligand exchange, complete dissociation and association, are proposed and related parameters...... hiện toàn bộ
Role of diffusional coherency strain theory in the discontinuous precipitation in Mg-Al alloy
Bulletin of Materials Science - Tập 23 - Trang 39-45 - 2000
K. T. Kashyap, C. Ramachandra, M. Sujatha, B. Chatterji
Discontinuous precipitation (DP) occurs in many alloy systems under certain conditions. It is called discontinuous precipitation because precipitation occurs on prior matrix grain boundaries followed by grain boundary movement. The DP nodule consists of alternate lamellae of the precipitate and the matrix respectively. The chemical driving force for DP is one of solute supersaturation. Although so...... hiện toàn bộ
Cracking cone fracture after cold compaction of argillaceous particles
Bulletin of Materials Science - Tập 32 Số 6 - Trang 607-610 - 2009
Souhir Abid, Mohamed Bouaziz, Hichem Ksibi
Influence of bismuth on properties and microstructures of Sr0.5Ba0.5−xBixTiO3 thin films
Bulletin of Materials Science - Tập 29 Số 5 - Trang 523-527 - 2006
Wen Hong Tao, Yin Wang, Xiao Fu, Qingyang Wei
Tổng số: 4,128   
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