摘要
采用共沉淀法合成了Ca1-xBaxZr4(PO4)6(x=0,025,0.5,0.75,1.0,简称CBZP)陶瓷粉体的前驱物。控制反应过程中溶液的pH值,并用低分子有机溶剂分散处理共沉淀物,防止反应过程中及固液分离过程中团聚体的形成。将先驱物在900℃下煅烧2h后,经XRD分析发现为单相的Ca1-xBaxZr4(PO4)6粉体。将CBZP系列粉体在100MPa下干压成型,添加3%质量分数的ZnO为助烧剂在1100℃下无压烧结2h,制成CBZP系列陶瓷。研究了x取值和抗弯强度值的关系及微观形貌对抗弯强度的影响。所得的烧结体抗弯强度最高值达到84.52MPa(x=0.25)。
Powders of Ca_(1-x)Ba_xZr_4(PO_4)_6 (x=0, 0.25, 0.5, 0.75, 1.0. abbreviated as CBZP) series were synthesized by co-precipitate method. The agglomeration can be prevented through controlling the pH value and dispersing with alcohol during synthesis. The X-ray diffraction patterns show that the precursors are single-phase Ca_(1-x)Ba_xZr_4(PO_4)_6 with NZP structure after being calcined at 900?℃ for 2 h. The ceramics of CBZP series were fabricated by dry pressing at 100?MPa and sintering in air at 1?100?℃ for 2 h with the addition of 3% wt ZnO. The relations between x and the bending strength were investigated, and the effect of microstructure was also discussed. The highest bending strength of CBZP ceramic is 84.52?MPa, in which x=0.25.
出处
《济南大学学报（自然科学版）》
CAS
2005年第3期201-203,共3页
Journal of University of Jinan(Science and Technology)
基金
国家高技术研究发展计划"863计划"资助项目(2003AA305910)
关键词
材料学
CBZP陶瓷
抗弯强度
微观形貌
material science
CBZP ceramics
bending strength
microstructure
