A study on the synthesis of (Ba,Ca)(Ti,Zr)O-3 nano powders using Pechini polymeric precursor method

作者：Hsieh Tung Hsien; Yen Shih Chao; Ray Dah Tong^*

来源：Ceramics International, 2012, 38(1): 755-759.

DOI：10.1016/j.ceramint.2011.08.001

• Pechini
• Polymeric precursor
• Perovslcites
• Nano powder
• BCTZ

Pechini polymeric precursor method was successfully used to synthesize (Ba0.95Ca0.05)(Ti0.85Zr0.15)O-3 nano powders. The results of TG/DTA, XRD and IR analyses showed that by heating the precursor between 490 degrees C and 580 degrees C, an intermediate phase with possible composition of (Ba,Ca)(2)(Ti,Zr)(2)O5CO3 was formed. Between 580 degrees C and 700 degrees C, the intermediate phase transformed to a crystalline solid solution by decarbonation reaction. The transformation completed at 700 degrees C. Nano-sized powders with equivalent sphere diameters about 72 nm were obtained by calcination of the precursor at 700 degrees C for 4 h. The ceramics sintered at 1300 degrees C for 2 h can reach about 95% theoretical density and the peak dielectric constant is 15,000 at 70 degrees C.

• 出版日期2012-1