The preparation of Ba0.8Sr0.2TiO3 powders by low-temperature combustion process of organic precursor
LIU Sai-zhu, GAO Ling-xiang*, HU Yan-yan, PEI Cuo-ping, WU Xiao-ni, HE Ling
(Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education; College of Chemistry and Materials Science, Shaanxi Normal University, Xi′an, 710062, Shaanxi, China)
Abstract:
Tartaric acid and ethylenediamine tetraacetic acid (EDTA) were used as multiple chelator, and Barium nitrate Ba(NO3)2, strontium nitrate Sr(NO3)2, tetrabutyl titanate Ti(OC4H9)4, ammonia NH3·H2O were used as raw materials,Ba0.8 Sr0.2TiO3 (BST) ceramic powders were prepared by using low-temperature combustion method. The results of XRD and TEM showed that BST powders were good in crystal, purity and identical size particles (about 40 nm). When BST powders were prepared at pH 7, the molar ratio of metal ions to tartaric acid being 1 to 1.5, and the heating treatment at 650℃ for 0.5 h.
KeyWords:
organic precursor and low-temperature combustion method; barium strontium titanate; multiple chelator; nano-powder
