Title :
Size effect in (SrxBa1-x)Nb2O6 ultrafine powder
Author :
Sheng-Guo, Lu ; Chee-Leung, Mak ; Kin-Hung, Wong
Author_Institution :
Hong Kong Polytech. Univ., Hong Kong
Abstract :
The sol-gel derived (SrxBa1-x)Nb2O6 (SBN) ultrafine powder can be obtained at an annealing temperature as low as 700°C, which is 500°C lower than that previously reported. The powder has a well crystallized pure perovskite structure and its average crystallite size is about decades of nm. The specific heat has a broadened peak, and the transition temperature from the ferroelectric to the paraelectric phase is clearly lower than that of SBN bulk material. This new phenomenon can be ascribed to the size effect
Keywords :
annealing; barium compounds; ferroelectric transitions; powder technology; size effect; sol-gel processing; specific heat; strontium compounds; 700 degC; SrBaNb2O6; annealing temperature; crystallite size; ferroelectric-paraelectric transition temperature; perovskite structure; size effect; sol-gel processing; specific heat; ultrafine powder; Annealing; Crystallization; Grain size; Niobium; Performance analysis; Powders; Strontium; Temperature; X-ray diffraction; X-ray scattering;
Conference_Titel :
Electron Devices Meeting, 1999. Proceedings. 1999 IEEE Hong Kong
Conference_Location :
Shatin
Print_ISBN :
0-7803-5648-9
DOI :
10.1109/HKEDM.1999.836406