煅烧条件对共沉淀法合成ZnZr_4(PO_4)_6粉体影响的研究  

Study on Calcinating Conditions of ZnZr_4(PO_4)_6 Powders by Coprecipitate Method

作　　者：吴铭敏[1] 王淑梅[1] 周竹发[1] 

机构地区：[1]苏州大学材料工程学院,江苏苏州215021

出　　处：《中国粉体技术》2008年第5期21-25,共5页China Powder Science and Technology

摘　　要：采用共沉淀法制备了磷酸锆锌(α-ZnZr_4(PO_4))粉体,探讨了磷酸锆锌粉体合成机理,研究了煅烧温度、保温时间等煅烧条件对粉体合成的影响,并用TG-DTA、FT-IR、XRD、TEM等方法进行表征。实验表明前驱体在900～950℃煅烧2h可以获得平均粒径200nm、结晶完全的α-ZnZr4(PO4)6粉体,采用此粉体制备的陶瓷材料1200℃时热膨胀系数为-2.0×10-6℃-1。The α-ZnZr4 （PO4）6 powder was synthesized by coprecipitate method. The mechanism of synthesizing , effectofthecalcinationtemperature and holding time to the powders synthesized were discussed. The precursor and the powder product were characterized by TG-DTA, FTIR, XRD, TEM etc. The results showed that the perfect crystallization powder of average grain size 200 nm were prepared at 900-950℃ for 2 hours. The ceramics had a lower thermal expansion coefficient of-2.0× 10^-6℃^-1 at 1 200℃.

关 键 词：共沉淀法 煅烧温度 热膨胀 

分 类 号：TQ174[化学工程—陶瓷工业]