摘要
利用固相法制备了ZrMgMo_3O_(12)粉末,利用放电等离子体烧结(SPS)技术制备了致密的低负热膨胀系数热障材料ZrMgMo_3O_(12)陶瓷,讨论了ZrMgMo_3O_(12)结构、表面形貌以及烧结温度对其热膨胀性能和热导率的影响规律.结果表明:烧结温度为750℃时,样品的致密性最好,相对密度高达97%以上;其平均体热膨胀系数为-4.0×10^(-6)/K;从室温到600℃的热导率为1.05~1.3 W/(m·K).因而,使用SPS烧结技术可以制备出致密度高、热膨胀系数和热导率低的ZrMgMo_3O_(12)陶瓷.
ZrMgMo3 O12 powders with negative thermal expansion were synthesized by solid-state reaction method. Spark plasma sintering （ SPS） technique was used to prepare ZrMgMo3 O12 ceramic. The influ-ences of structure, surface morphology and sintering temperature of ZrMgMo3 O12 on the properties of ther-mal expansion and thermal conductivity were discussed. The results showed： the sample sintered at the temperature of 150℃ had the highest relative density more than 97%. From room temperature to 600℃, the thermal expansion coefficient and the thermal conductivity were -4. 0 × 10-6/K and 1. 05~1. 3 W/（m·K）, respectively. Hence, ZrMgMo3 O12 ceramic with high relative density, low thermal expansion coefficient and thermal conductivity could be prepared by SPS technique.
作者
姚宁
刘前霞
李伟杰
史新伟
连虹
晁明举
梁二军
YAO Ning LIU Qianxia LI Weijie SHI Xinwei LIAN Hong CHAO Mingju LIANG Erjun(School of Physical Science ＆ Engineering and Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou 450052, Chin)
出处
《郑州大学学报（理学版）》
CAS
北大核心
2016年第4期74-79,共6页
Journal of Zhengzhou University:Natural Science Edition
