无机材料学报 ›› 2021, Vol. 36 ›› Issue (4): 418-424.DOI: 10.15541/jim20200367

所属专题: 【虚拟专辑】透明陶瓷与光学晶体 【结构材料】高熵陶瓷 【信息功能】透明陶瓷与光学晶体

• 研究论文 • 上一篇    下一篇

真空烧结制备(La0.2Nd0.2Sm0.2Gd0.2Er0.2)2Zr2O7高熵透明陶瓷

曾建军1(), 张魁宝1,2(), 陈代梦1, 郭海燕1, 邓婷1, 刘奎1   

  1. 1.西南科技大学 环境友好能源材料国家重点实验室, 绵阳 621010
    2.西南科技大学 核废物与环境安全国防重点学科实验室, 绵阳 621010
  • 收稿日期:2020-07-02 修回日期:2020-09-18 出版日期:2021-04-20 网络出版日期:2020-10-30
  • 通讯作者: 张魁宝, 研究员. E-mail: xiaobao320@163.com
  • 作者简介:曾建军(1997-), 男, 硕士研究生. E-mail: zeng_jianjun@126.com
  • 基金资助:
    国家自然科学基金(51672228);环境友好能源材料国家重点实验室自主课题(西南科技大学)(18FKSY0214);环境友好能源材料国家重点实验室自主课题(西南科技大学)(20fksyII)

Preparation of (La0.2Nd0.2Sm0.2Gd0.2Er0.2)2Zr2O7 High-entropy Transparent Ceramics by Vacuum Sintering

ZENG Jianjun1(), ZHANG Kuibao1,2(), CHEN Daimeng1, GUO Haiyan1, DENG Ting1, LIU Kui1   

  1. 1. State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China
    2. Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang 621010, China
  • Received:2020-07-02 Revised:2020-09-18 Published:2021-04-20 Online:2020-10-30
  • Contact: ZHANG Kuibao, professor. E-mail: xiaobao320@163.com
  • About author:ZENG Jianjun(1997-), male, Master candidate. E-mail: zeng_jianjun@126.com
  • Supported by:
    Natural Science Foundation of China(51672228);Project of State Key Laboratory of Environment-friendly Energy Materials(Southwest University of Science and Technology)(18FKSY0214);Project of State Key Laboratory of Environment-friendly Energy Materials(Southwest University of Science and Technology)(20fksyII)

摘要:

高熵陶瓷是近年来陶瓷材料研究的热点, 制备性能优异的高熵陶瓷是陶瓷材料的发展趋势。本研究采用燃烧法结合真空烧结制备出高熵透明陶瓷。测试结果显示燃烧法制备高熵(La0.2Nd0.2Sm0.2Gd0.2Er0.2)2Zr2O7粉体的平均晶粒尺寸为8 nm, 高熵粉体为无序的缺陷萤石结构。在真空炉中不同温度烧结的高熵陶瓷具有有序的烧绿石结构。烧结温度对高熵透明陶瓷的在线透过率影响不大, 最大透过率为74%(@1730 nm), 其透过率光谱中出现大量吸收峰。随着烧结温度的升高, 陶瓷的体积密度有所上升, 晶粒尺寸增大, 而维氏硬度逐渐降低。

关键词: 高熵, 透明陶瓷, 烧绿石

Abstract:

High-entropy ceramic is a hot topic in the recent study of ceramic materials. High-entropy ceramics with excellent properties is the development trend of ceramic materials. In this research, high-entropy transparent ceramic was synthesized by combustion method combined with vacuum sintering. The result indicates that the mean grain size of high-entropy (La0.2Nd0.2Sm0.2Gd0.2Er0.2)2Zr2O7 powder is about 8 nm. And the high-entropy powder is disordered deficient fluorite structure. The final transparent ceramics sintered in vacuum furnace at different temperatures exhibit ordered pyrochlore structure. Sintering temperature has little effect on the transmittance of ceramics. And the in-line transmittance of as-prepared transparent ceramic can reach 74% at 1730 nm. There are many absorption peaks in the transmittance spectrum. With the increase of sintering temperature, the body density and grain size of ceramics increase, but the HV hardnesses decrease.

Key words: high-entropy, transparent ceramic, pyrochlore

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