Synthesis of Semiconducting Barium Strontium Titanate Nanosize Powders through Sol-Gel Process

摘要

Semiconducting Ba{sub}(1-x)BSr{sub}xTiO{sub}3 B(x=0.1,0.2,0.3,0.4 and 0.5)B Bdoped with Sb and either mixed with or without boronB Boxide (BB{sub}2BOB{sub}3B) sintering aid is synthesized through Sol-Gel process. The raw materials used for nanosize powder synthesis precursor are barium acetate, strontium acetate, titanium isopropoxide, antimony isopropoxide and triethyl borateB Brespectively. The XRD, TGA and TEM analysis of the intermediate resultants during the Sol-Gel procedure are conducted. It shows that the semiconducting BST with precisely controlled chemical composition can be obtained successfully. It is quite feasible through this process to obtain nanosize semiconducting Barium Strontium Titanate (BST) with different chemical composition and hence different Curie temperature. In addition, the synthesized powders with the addition of boronB Boxide as sintering aid can be sintered at low temperature (1050°CX6h).