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Browsing by Author "Vaidyan, V K"

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Growth and Characterization of Indium Oxide Thin Films Prepared by Spray Pyrolysis

Manoj, P K; Gopchandran, K G; Peter Koshy; Vaidyan, V K; Benny Joseph (Elsevier, 2006-09)

Highly transparent and conducting indium oxide thin films are prepared on glass substrates from precursor solution of indium chloride. These films are characterized by X-ray diffraction, scanning electron microscopy and ...
Improved dielectric properties in pyrochlore type oxides: Ca3Sm3−xBixTi7Nb2O26.5 (x = 1.0, 2.0 or 3.0) by Bi substitution

Prabhakar Rao, P; Ravindran Nair, K; Divya, P; Peter Koshy; Vaidyan, V K (Springer, 2005)

Improved dielectric properties are observed in pyrochlore type oxides, Ca3Sm3-x BixTi7Nb2O26.5 (x = 1.0, 2.0 or 3.0) by Bi substitution. The dielectric constant increased with increasing Bi concentration. The dielectric ...
Ionic conductivity in new perovskite type oxides: NaAZrMO(6) (A = Ca or Sr; M = Nb or Ta)

Deepthi, N R; Ravindran Nair, K; Prabhakar Rao, P; Sibi, K S; Peter Koshy; Vaidyan, V K (Elsevier, 2008)

New oxides of the type, NaAZrMO(6) (M = Ca or Sr; M = Nb or Ta), have been prepared by the solid-state reaction technique. Phase identification by powder X-ray diffraction (XRD) shows that NaCaZrMO6 has orthorhombic ...
Microwave Dielectric Properties of New Pyrochlore Type Oxides: Pb3R3Ti7Nb2O26.5 (R = Y, Pr, Nd, Gd or Dy)

Prabhakar Rao, P; Deepthi, N R; Ravindran Nair, K; Peter Koshy; Vaidyan, V K (Elsevier, 2006-03-15)

The microwave dielectric properties of new pyrochlore type oxides: Pb3R3Ti7Nb2O26.5 (R = Y, Pr, Nd, Gd or Dy) have been presented in this paper. These compounds have cubic pyrochlore type structure. Microstructure of the ...
Microwave dielectric properties of novel lithium containing pyrochlore type oxides: Li3Sm3-xBixTi7Nb2O25 (x=0, 1, 2 or 3)

Prabhakar Rao, P; Ravindran Nair, K; Peter Koshy; Vaidyan, V K (Elsevier, 2007)

Microwave dielectric properties of novel lithium ion containing pyrochlore type oxides: Li3Sm3-xBixTi7Nb2O25 (x=0, 1, 2 or 3) have been reported in this paper. Powder X-ray diffraction patterns show that these oxides have ...
Nanostructural and surface morphological evolution of chemically sprayed SnO2 thin films

Chacko, S; Philip, N S; Gopchandran, K G; Peter Koshy; Vaidyan, V K (Elsevier, 2008)

Physical properties of a nanocrystalline thin film is greatly influenced by its morphological and structural evolution. We try to understand the transition of SnO2 thin films from amorphous to nanocrystalline structure ...
New dielectric materials based on pyrochlore-type oxides-Ca3RE3Ti7Ta2O26.5 (RE = Pr, Sm, Gd, Dy or Y): Structure, FT-IR spectra, microstructure and dielectric properties

Prabhakar Rao, P; Ravindran Nair, K; Peter Koshy; Vaidyan, V K (Springer, 2006)

New dielectric materials based on complex oxides containing rare earth tantalates: Ca3RE3Ti7Ta2O26.5 (RE = Pr, Sm, Gd, Dy or Y) have been investigated for their structure, FT-IR spectra, microstructure and dielectric ...
New perovskite type oxides: NaATiMO(6) (A=Ca or Sr; M=Nb or Ta) and their electrical properties

Deepthi, N R; Ravindran Nair, K; Prabhakar Rao, P; Sibi, K S; Peter Koshy; Vaidyan, V K (Elsevier, 2008)

New oxides of the type, NaATiMO(6) (M= Ca or Sr; M=Nb or Ta), have been prepared by the solid state reaction technique. Phase identification by powder X-ray diffraction (XRD) shows that NaCaTiMO6 have orthorhombic perovskite ...
New pyrochlore type semiconducting ceramic oxides: Ca3Ce3-xBixTi7Nb2O26.5(x=0.5, 1.0, 2.0, or 3.0) - structure, microstructure and electrical properties

Prabhakar Rao, P; Ravindran Nair, K; Seema, K V; Peter Koshy; Vaidyan, V K (Springer, 2005)

Oxides of the pyrochlore family have a general formula A2B2O7 and they have been extensively studied because of their wide spectrum of physical properties including electrical, magnetic, optical, dielectric, and catalytic ...

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