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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 ...
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 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 ...
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 ...
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 ...
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 ...
Effect of 1 wt% CoO addition on dielectric and microstructural behaviour of (SrO·TiO2)-(2SiO2·B2O 3) glass and glass ceramic

Thakur, O.P.; Kumar, D.; Parkash, O.M.; Pandey, L. (Indian Academy of Sciences, 1996)

Glass of the nominal composition 64wt%(SrO·TiO2)-35 wt%(2SiO2·B2O3)-1 wt%(CoO) was prepared. The glass samples were subjected to heat treatment at 900 and 950°C. The phase progression in these glass ceramics from X-ray ...
Effect of 1 wt% CoO addition on dielectric and microstructural behaviour of (SrO·TiO2)-(2SiO2·B2O 3) glass and glass ceramic

Thakur, O.P.; Kumar, D.; Parkash, O.M.; Pandey, L. (Indian Academy of Sciences, 1996)

Glass of the nominal composition 64wt%(SrO·TiO2)-35 wt%(2SiO2·B2O3)-1 wt%(CoO) was prepared. The glass samples were subjected to heat treatment at 900 and 950°C. The phase progression in these glass ceramics from X-ray ...
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 ...
Analysis the effect of TiO2 addition on sintering, physical mechanical behavior of porcelain insulating material

Mehta, N.S.; Dey, S.; Singh, V.; Majhi, M.R. (Elsevier B.V., 2001-06-01)

The present study is aimed to develop a high strength porcelain insulating material from locally available low cost raw porcelain materials by reinforcement of TiO2 (0 to 10 in wt.%) as a substitute replacing ZrO2 in the ...
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 ...
Comparative investigation on the effect of alkaline earth oxides on the intensity of absorption bands due to Cu2+, Mn3+ and Cr3+ ions in ternary silicate glasses

Singh, S.P.; Aman; Tarafder, A. (Indian Academy of Sciences, 2004-06)

Absorption characteristics of Cu2+, Mn3+ and Cr 3+ ions in ternary silicate (20Na 2O·10RO·0SiO2, where R=Ca, Sr, Ba) glasses were investigated. The intensities of absorption bands due to Cu2+ ion was found to increase with ...
Role of tin as a reducing agent in iron containing heat absorbing soda-magnesia-lime-silica glass

Singh, S P; Aman (Indian Academy of Sciences, 2004-12)

The role of tin as a reducing agent in a 18Na 2O·2MgO·8CaO·72SiO2 glass containing a definite amount of total, σFe = [Fe2+] + [Fe3+], was investigated with different concentrations of total tin, σSn = [Sn2+] + [Sn4+], by ...
Crystallization behavior and microstructural analysis of lead-rich (P b x S r 1 - X) TiO 3 glass ceramics containing 1mole L a 2 O 3

Gautam, C.R.; Kumar, D.; Parkash, O. (2011)

Solid solution of perovskite Pb,SrTiO3 in Pb-rich composition can be crystallized in borosilicate glassy matrix. The addition of rare earth and transition metal oxides is known to influence the crystallization behavior and ...
Ceria co-doped with calcium (Ca) and strontium (Sr)

Jaiswal, Nandini; Kumar, Devendra; Upadhyay, Shail; and et.al. (Springerlink.com, 2013-07-11)

Co-doped samples of Ce0.95-xCa0.05SrxO1.95-x, where (x = 0.00, 0.01, 0.02, and 0.03), have been prepared by auto-combustion method and characterized to explore their use as a solid electrolyte for intermediate temperature ...
Structural and mechanical behaviour of 5% Al2O3-reinforced Fe metal matrix composites (MMCs) produced by powder metallurgy (P/M) route

Gupta, Pallav; Parkash, Om; Kumar, Devendra; and et al. (Indian Academy of Sciences, 2013-10)

The aim of this paper is to investigate the effect of sintering temperature and time on the properties of Fe-Al2O3 composite (5 wt% Al2O 3; 95 wt% Fe) prepared by powder metallurgy process. X-ray diffraction, microstructure, ...
Antioxidant Property of Aerial Parts and Root of Phyllanthus fraternus Webster, an Important Medicinal Plant

Upadhyay, Richa; Chaurasia, Jitendra Kumar; Tiwari, Kavindra Nath; Singh, Karuna (Elsevier B.V., 2014-01-23)

Ferrochrome slag is a waste material obtained from the manufacturing of high carbon ferrochromium alloy. This slag is formed as a liquid at 1700°C and its main components are SiO2, Al2O3 and MgO. Additionally it consists ...

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