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Browsing by Subject "Pyrochlore"

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Low temperature coefficient dielectric materials, PbRETiTaO7 (RE=Y, La, Nd, Sm, Gd, or Dy) having pyrochlore type structure

Anjana, V; Prabhakar Rao, P; Nair, K R; Peter Koshy (Maney Publishing, 2009)

The present work investigates the dielectric properties of pyrochlore type oxides, PbRETiTaO7 (RE=Y, La, Nd, Sm, Gd, or Dy) in the low frequency region (100 kHZ-1 MHz) at temperatures between 30 and 100 degrees C and the ...
Novel Molybdenum based Pyrochlore Type Red Phosphors, NaGd1−xSnMoO7: xEu3+ under Near UV and Blue Excitation

Reshmi, V R; Prabhakar Rao, P; Athira, K V R; Sreena, T S (Elsevier, 2017-10)

Novel molybdenum based pyrochlore type red emitting phosphor materials: NaGd1−xSnMoO7: xEu3+ were prepared by the conventional solid state route. The developed phosphors were characterized for their structure as well as ...
Order–disorder Phase Transformations in Quaternary Pyrochlore Oxide System: Investigated by X-ray Diffraction, Transmission Electron Microscopy and Raman Spectroscopic Techniques

Radhakrishnan, A N; Prabhakar Rao, P; Sibi, K S; Deepa, M; Peter Koshy (Elsevier, 2009-08)

Order–disorder transformations in a quaternary pyrochlore oxide system, Ca–Y–Zr–Ta–O, were studied by powder X-ray diffraction (XRD) method, transmission electron microscope (TEM) and FT-NIR Raman spectroscopic techniques. ...
Oxide ion conductivity and relaxation in CaREZrNbO7 (RE=La,Nd, Sm,Gd, and Y) system

Sibi, K S; Radhakrishnan, A N; Deepa, M; Prabhakar Rao, P; Peter Koshy (Elsevier, 2009)

CaREZrNbO7 (RE=La, Nd, Sm, Gd and Y) system changed from fluorite (F)-type to pyrochlore (P)-type structure when the ionic radius ratios, r(Ca2+–RE3+)av/r(Zr4+–Nb5+)av were larger than 1.34. Thus, the La, Nd, and Sm ...

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