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114th General Meeting of Korean Chemical Society Synthesis and structure determination of new oxynitride perovskites compounds, A0.7Li0.3Ta0.7OxNy ( A = Ca, Sr, La )

Submission Date :
8 / 28 / 2014 , 13 : 57 : 17
Abstract Number :
114082809208
Presenting Type:
Poster Presentation
Presenting Area :
재료화학
Authors :
김정미, 김영일*
영남대학교 화학과, Korea
Assigned Code :
MAT.P-1093 Assigend Code Guideline
Presenting Time :
10월 15일 (수요일) 16:00~19:00
New oxynitride perovskites compounds of Ca0.7Li0.3Ta0.7O2N , Sr0.7Li0.3Ta0.7O2N and La0.7Li0.3Ta0.7ON2 have been synthesis and compared qualitatively, quantitatively. Amonolytic heating of the layered perovskies Ca2Ta2O7, Sr2Ta2O7 and LaTaO4 with Li2CO3 produced defect perovskites oxynitrides containing lithium on the octahedral site. resulted in the perovskites with substantial amounts of vacancy defects both on the cation and anion sites. Above process can be induces cooperative Li+ insertion into the precursor and the charge-balancing O2-/N3- exchange. The crystal structures of these compounds have been determined by Rietveld analysis through X-Ray powder diffraction patterns and combustion analysis.