Title: Rare earth-doped srstrontium cerate nano crystal ceramic preparing method
Application Number: 03129416 Application Date: 2003.06.20
Publication Number: 1470478 Publication Date: 2004.01.28
Approval Pub. Date: Granted Pub. Date: 2005.05.25
International Classifi-cation: C04B35/50,C04B35/624,C04B35/64
Applicant(s) Name: Shanghai Univ. Address: 200072
Inventor(s) Name: Fang Jianhui, Ding Weizhong
Attorney & Agent: gu yonghua
Abstract:
     The present invention for ceramics of rare earth doped with strontium cerate nano crystal mainly adopts sol-gel method, to prepare the solution with a certain concentration by using cerous nitrate, strontium nitrate or strontium acetate and rare earth oxide as raw material, the weight ratio of them is dependent on the composition of ceramics to be prepared, the composition of the ceramics is SrCe1-xRExO3, in which the range of x value is 0.02-0.20, the concentraitons of cerous nitrate, strontium nitrate or strontium acetate are 0.2-2 mol/L respectively, using citric acid as complex builder, the added quantity of citric acid is 1.5-2.5 times the said solution, under stirring or ultrasonic vibration, heating in wate bath with 50-80 deg.C, regulating pH value to obtain transparent gel, drying to obtain opaque dried gel.
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