摘要
采用通过磷酸盐直接共沉淀法制备的K0.6Sr0.7Zr4P6O24(KSZP)纳米粉末作为原料,烧结成致密KSZP陶瓷,研究了KSZP陶瓷的烧结特性、膨胀特性及力学性能,分析烧结条件对各种性能的影响机制.结果表明,KSZP纳米粉末的适宜烧结工艺条件为:烧结助剂Nb2O52%,1380℃下烧结2h.获得的KSZP陶瓷相对密度为94.61%,0～600℃平均线膨胀系数为1.4×10-6/℃,抗弯强度为91.83MPa.研究发现,粉末的烧结速度很快,在烧结后期,晶粒并未迅速长大.
K_(0.6)Sr_(0.7)Zr_4P_6O_(24) (KSZP) ceramics were prepared with KSZP nanometer powder as the raw material synthesized by phosphate direct co-precipitation. The sintering, thermal expansion and mechanical properties of the KSZP ceramics were studied, and the effects of sintering conditions on these properties were analyzed. The obtained suitable sintering conditions for KSZP ceramics are as follows: Nb_2O_5 additive is 2%, sintering temperature is 1 380℃, and sintering time is 2 h. The relative density of KSZP ceramics sintered under above conditions is about 94.61%, the bending strength is 91.83 MPa, and the average value of thermal expansion coefficient at 0～600℃ is about 1.4×10^(-6)/℃, which is under very low level. The sintering rate is supposed to be rapid, and the crystalline grain does not grow rapidly in the final stage.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2004年第7期926-930,共5页
Journal of Zhejiang University：Engineering Science
基金
国家"863"高技术研究发展计划资助项目(2003AA302760).
关键词
纳米粉末
陶瓷
烧结
热膨胀
力学性能
nanometer powder
ceramics
sintering
thermal expansion
mechanical property
