Browsing School of Material Science and Technology by Author "Kumar, D."

Browsing School of Material Science and Technology by Author "Kumar, D."

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  • Dielectric properties of the system Ca1 -x La x Ti1 -x Co x O3 
    Durga Prasad, C.; Tewari, H.S.; Kumar, D.; Parkash, O. (Springer India, 1988-12)
    Dielectric behaviour of samples of the system Ca1 -x La x Ti1 -x Co x O3 with x ≤ 0·20 has been studied in the temperature range 300-525 K as a function of frequency. The strong dispersion of e{open} and D observed in these ...
  • Effect of composition on dielectric and electrical properties of the Sr1-xLaxTi1-xCoxO3 system 
    Upadhyay, S.; Kumar, D.; Parkash, O. (Indian Academy of Sciences, 1996)
    Valence compensated perovskite system Sr1-xLaxTi1-xCoxO3 shows dielectric relaxor behaviour with very high value of dielectric constant in the composition range 0.20 < x < 0.40. In this paper the effect of composition on ...
  • 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 ...
  • Equivalent circuit models for electronic ceramics 
    Pandey, L.; Parkash, O.M.; Katare, R.K.; Kumar, D. (Springer India, 1995-09)
    Complex immittance spectra of model equivalent circuits involving resistive and capacitive elements are calculated. A comparison of experimentally obtained complex immittance plots with these diagrams greatly facilitates ...
  • 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 ...

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