Department of Ceramic Engineering: Recent submissions

Now showing items 21-40 of 88

Optical absorption and fluorescent behaviour of titanium ions in silicate glasses

Kumar, M.; Uniyal, A.; Chauhan, A.P.S.; Singh, S.P. (Indian Academy of Sciences, 2003-04)

Titanium in normal melting conditions in air atmosphere present as Ti4+ ion in basic silicate glasses exhibited an ultra-violet cut-off in silicate glasses, viz. soda-magnesia-silica, soda-magnesia-lime-silica and ...
Slip processing of high T c superconductors

Sinha, R.K.; Sinha, R.K. (Springer India, 1991-08)

Slip-processing technique has been used to fabricate tapes and alumina-supported films of superconducting YBa2Cu3O7-x . Good densification and connectivity are revealed by scanning electron microscopy. Both the tape and ...
Electrical behaviour of lanthanum- and cobalt-doped strontium stannate

Parkash, O.M.; Mandal, K.D.; Christopher, C.C.; Sastry, M.S. (Springer India, 1994-06)

Electrical properties of lanthanum- and cobalt-doped strontium stannate, SrSnO3, have been studied as a function of temperature. All the compositions investigated have cubic structure. Measurement of Seebeck coefficient ...
Microstructural and dielectric behaviour of glass ceramics in the system PbO-BaO-TiO2-B2O3-SiO2

Parkash, O.M.; Kumar, D.; Rajgopalan, R. (Springer India, 1986-02)

Glasses in the system PbO-BaO-TiO2-B2O3-SiO2 with and without P2O5 as nucleant have been prepared. The glass samples were ceramized based on dta studies. The ferroelectric phase crystallizing out has been found to be BaTiO3 ...
Glass ceramics containing ferroelectric phases

Parkash, O.; Kumar, D.; Pandey, L. (Springer India, 1986-12)

Glass ceramics prepared by controlled crystallization of glasses produce fine dispersion of crystallites in a glassy matrix. Glasses containing a mjor portion of constituents of a ferroelectric phase produce crystallites ...
Electrical conduction in the solid solution La1 -x Na x Co1 -x Nb x O3 (0·01 ≤x ≤ 0·99)

Parkash, O.M.; Kumar, D.; Kumar, R. (Springer India, 1988-05)

Seebeck coefficient and DC resistivity of the solid solution La1 -x Na x Co1 -x Nb x O3 (0·01 ≤x ≤ 0·99) have been measured in the temperature range 300-900 K. Seebeck coefficient is positive for all compositions over the ...
Preparation and characterization of Ca1 -x La x Ti1 -x Co x O3 (0·00

Parkash, O.M.; Durga Prasad, Ch.; Kumar, D. (Springer India, 1988-09)

The possibility of the formation of solid solution in the system Ca1 -x La x Ti1 -x Co x O3 for x≤0·5 has been investigated. X-ray diffraction studies show that compositions with x=0·05, 0·1, 0·2, 0·3 and 0·5 prepared by ...
Electrical properties of the system lanthanum lead cobalt titanium oxide

Kumar, D.; Prasad, Ch.D.; Parkash, O. (Springer India, 1987-06)

Measurements of DC electrical resistivity and Seebeck coefficient on the perovskite system La1-x Pb x-δ Co1-x Ti x O3-δ for 0·2≤x≤0·9 have been made in the temperature range 300-800 K. AC conductivity, σ a.c, of all the ...
Dielectric behaviour of glasses and glass ceramics in the system BaO-PbO-TiO2-B2O3-SiO2

Mandal, R.K.; Prasad, Ch.D.; Parkash, O.M.; Kumar, D. (Springer India, 198-11)

Glasses with varying molar ratios of PbO/BaO in the system BaO-PbO-TiO2-B2O3-SiO2 were prepared keeping (BaO + PbO)/TiO2 ratio equal to one. The glasses were ceramized by two-stage heat treatment. X-ray diffraction indicates ...
Electrical conduction in the solid solution La1 -x Na x Co1 -x Nb x O3 (0·01 ≤x ≤ 0·99)

Parkash, O.M.; Kumar, D.; Kumar, R. (Springer India, 1988-05)

Scebeek coefficient and DC resistivity of the solid solution Lal _~Na~Col _~Nb~O3 (001 ~< x <~0-99) have been measured in the temperature range 300-900 K. Seebeck coefficient is positive for all compositionsover the ...
Crystallization and microstructural behaviour of strontium titanate borosilicate glass ceramics with Bi2O3 addition

Thakur, O.P.; Kumar, D.; Parkash, O.M.; Pandey, L. (Indian Academy of Sciences, 1997)

Glasses in the system (65 - x) [SrO · TiO2]-(35) [2SiO2 · B2O3]-(x) [Bi2O3] where x = 1,5,10 (wt%) prepared by melting in alumina crucible (1375-1575 K), were subjected to different heat treatment schedules followed by DTA ...
A comparative study of leaves extracts for corrosion inhibition effect on aluminium alloy in alkaline medium

Chaubey, N.; Yadav, D.K.; Singh, V.K.; Quraishi, M.A. (Ain Shams University, 2017-12)

This paper deals with the comparative inhibition study of some plants leaves extract namely Cannabis sativa (CS), Rauwolfia serpentina (RS), Cymbopogon citratus (CC), Annona squamosa (AS) and Adhatoda vasica (AV) on the ...
Electromagnetic interference shielding effectiveness of MgO−Al2O3−SiO2 glass-ceramic system

Kumari, P.; Tripathi, P.; Parkash, O.M.; Kumar (Indian Academy of Sciences, 2017-12)

MgO−Al2O3−SiO2 (MAS)-based glass-ceramic system was prepared using very-low-cost raw materials, i.e., talc, calcined alumina and calcined China clay with titanium dioxide as a nucleating agent. Glass-ceramics were prepared ...
Investigation of crystal structure, microstructure and low temperature magnetic behavior of Ce4+ and Zn2+ co-doped barium hexaferrites (BaFe12O19)

Tanwar, K.; Gyan, D.S.; Gupta, P.; Pandey, S.; Omparkash; Kumar, D. (Royal Society of Chemistry, 2018)

Ce4+ and Zn2+ co-doped barium hexaferrites (BFO) have been synthesized via a citrate-nitrate autocombustion route. Phase purity has been confirmed by high resolution (HR) powder X-ray diffraction analysis. Rietveld refinement ...
Study of physical and dielectric properties of bio-waste-derived synthetic wollastonite

Hossain, S.S.; Roy, P.K. (Taylor and Francis Ltd., 2018-07-03)

The aim of this study is to fabricate synthetic wollastonite from chicken eggshells (CES) and rice husk ash (RHA) through an economical solid-state route. Wollastonite was formulated with a stoichiometric amount of calcined ...
Advance research progresses in aluminium matrix composites: manufacturing & applications

Garg, Pulkit; Jamwal, Anbesh; Kumar, Devendra; Sadasivuni, Kishor Kumar; Hussain, Chaudhery Mustansar; Gupta, Pallav (Elsevier Editora Ltda, 2019)

At present aluminium matrix composites are widely used in engineering applications. Aluminium matrix composites are providing such superior properties which cannot be achieved by any existing monolithic material. Properties ...
Room temperature electrical properties and excitation performance of Al2O3 doped fused silica ceramics

Hajra, Sugato; Sahu, Manisha; Purohit, Varsa; Mohanta, Kalyani; Panigrahi, Basanta K.; Deepti, P.L. (Institute of Physics Publishing, 2019)

Al2O3 doped fused silica ceramic samples were synthesized by colloidal processing route. X-ray diffraction technique helped to give insight upon the phase formation of the synthesized samples. The dense growth of grains ...
Effect of Synthesis Techniques on the Optical Properties of Ho 3+ /Yb 3+ Co-doped YVO 4 Phosphor: A Comparative Study

Dwivedi, A.; Rai, E.; Kumar, D.; Rai, S.B. (American Chemical Society, 2019-04-16)

The Ho 3+ /Yb 3+ -codoped YVO 4 phosphors have been synthesized by three different techniques (viz., solution combustion, sol-gel, and solid-state reaction techniques). X-ray diffraction patterns confirm the formation of ...
Enhancement of thermoelectric power factor by inducing octahedral ordering in La2-xSrxCoFe O6 double perovskites

Tanwar, K.; Gyan, D.S.; Bhattacharya, S.; Vitta, S.; Dwivedi, A.; Maiti, T. (American Physical Society, 2019-05-14)

Among the various oxide thermoelectric materials, double perovskites provide more flexibility to maneuver interdependent thermoelectric parameters to achieve enhanced thermoelectric figure of merit (ZT), as octahedral ...
Development of sustainable calcium silicate board: Utilization of different solid wastes | [Desarrollo de tableros de silicato de calcio sostenibles: utilización de diferentes residuos sólidos]

Hossain, S.K.S.; Roy, P.K. (Sociedad Espanola de Ceramica y Vidrio, 2019-11)

The present investigation aims to estimate the feasibility of using eggshell and rice husk ash (RHA) as ingredients to produce calcium silicate board (CSB). The solid-state route was used to prepare the calcium silicate ...

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