摘要
采用传统固相工艺合成ZrW_2O_8-ZrSiO_4(体积比为1∶1)陶瓷复合材料,通过扫描电镜、和热机械分析仪分别对制备样品的断面形貌、物相组成和热膨胀性能进行表征.研究结果表明,复合材料的最佳烧结温度和时间为1 200℃和8 h,烧结过程中各组分之间没有发生化学反应,复合材料中仅含有原始组分ZrW_2O_8和ZrSiO_42种物相,其在25~300℃的平均热膨胀系数为-0.77%10^(-6)K^(-1).
The Zr W2O8- ZrSiO4 ceramic composites were successfully prepared by using the traditional solid- phase synthesis method in volume ratio of 1 ∶ 1. The specimens of fracture surface,phases and thermal expansion properties were characterized by way of scanning electron microscope（ SEM）,X- ray powder diffraction（ XRD） and thermal mechanical analysis（ TMA）,respectively. The results show that the optimum sintering temperature and sintering time of the composite material are 1 200 ℃ and 8 h,respectively. There is none chemical reaction taking place during the sintering process,and so the composite only contains ZrSiO4 and ZrW2O8 phase. The average thermal expansion coefficient is- 0. 77 ×10^-6K^-1 from 25 ℃ to 300 ℃.
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2015年第4期107-110,共4页
Journal of Hunan University of Science And Technology：Natural Science Edition
基金
湖南省自然科学基金资助项目(11JJ5025)
理论化学与分子模拟省部共建教育部重点实验室开放基金项目(E21405)
