| 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ZrSiO42种物相，其在25 ~ 300 ℃的平均热膨胀系数为-0.77*10-6 K-1. |
| 关键词: ZrW2O8 烧结 X-射线粉末衍射 热膨胀系数 |
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| Preparation and thermal properties of ZrW2O8-ZrSiO4 composite |
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| Abstract: |
| 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 ZrSiO4and ZrW2O8 phase.The average thermal expansion coefficient is -0.77*10-6K-1from 25 ℃ to 300 ℃. |
| Key words: ZrW2O8 sintering X-ray powder diffraction coefficient of thermal expansion |
