文章摘要
ZrW2O8-ZrSiO4复合材料的制备及其热膨胀性能
Preparation and thermal properties of ZrW2O8-ZrSiO4 composite
  
DOI:
中文关键词: ZrW2O8  烧结  X-射线粉末衍射  热膨胀系数
英文关键词: ZrW2O8  sintering  X-ray powder diffraction  coefficient of thermal expansion
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作者单位
向绍斌1,3,肖秋国2,3,张飞2,3,彭美勋2,3,张欣2,3,申少华2,3 1.湖南科技大学 机电工程学院湖南 湘潭 4112012.湖南科技大学 化学化工学院湖南 湘潭 4112013.湖南科技大学 理论化学与分子模拟省部共建教育部重点实验室湖南 湘潭 411201 
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中文摘要:
      采用传统固相工艺合成ZrW2O8-ZrSiO4(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ZrW2O8和ZrSiO42种物相,其在25 ~ 300 ℃的平均热膨胀系数为-0.77*10-6 K-1.
英文摘要:
      The ZrW2O8-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*10-6K-1from 25 ℃ to 300 ℃.
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