无机材料学报 ›› 2019, Vol. 34 ›› Issue (10): 1072-1076.DOI: 10.15541/jim20180588

• 研究论文 • 上一篇    下一篇

ZnO·2.56Al2O3透明陶瓷凝胶注模成型与烧结制备

张金诚,王皓(),徐鹏宇,涂兵田,王为民,傅正义   

  1. 武汉理工大学 材料复合新技术国家重点实验室, 武汉 430070
  • 收稿日期:2018-12-14 修回日期:2019-01-14 出版日期:2019-09-23 发布日期:2019-05-29
  • 作者简介:张金诚(1994-), 男, 硕士研究生. E-mail: 18369956157@163.com
  • 基金资助:
    国家重点研发计划(2017YFB0310500);国家自然科学基金(51472195);国家自然科学基金(51502219)

Preparation of ZnO·2.56Al2O3 Transparent Ceramics by Aqueous Gelcasting and Hot Isostatic Pressing

ZHANG Jin-Cheng,WANG Hao(),XU Peng-Yu,TU Bing-Tian,WANG Wei-Min,FU Zheng-Yi   

  1. State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
  • Received:2018-12-14 Revised:2019-01-14 Online:2019-09-23 Published:2019-05-29
  • Supported by:
    The National Key Research and Development Program of China(2017YFB0310500);National Natural Science Foundation of China(51472195);National Natural Science Foundation of China(51502219)

摘要:

锌铝尖晶石透明陶瓷是典型的结构功能一体化材料, 具有优异的光学、热学以及介电性能。本研究以ZnAl2O4和Al2O3为原料, 通过凝胶注模成型制备ZnAl2O4-Al2O3复相陶瓷初坯。实验探究了分散剂含量、pH以及固相量对ZnAl2O4-Al2O3混合料浆流变学特性的影响, 制得固相量为50vol%的低黏度稳定料浆。浇注成型后的坯体通过无压烧结和热等静压反应烧结制备透明陶瓷。最终获得的ZnO·2.56Al2O3透明陶瓷样品在厚度为1.8 mm下可见光波段透过率达到70%, 红外波段透过率达到80%以上, 维氏硬度为(11.34±0.17) GPa, 杨氏模量为285 GPa。

关键词: ZnO·2.56Al2O3, 透明陶瓷, 凝胶注模成型, 热等静压烧结

Abstract:

Zinc-aluminum spinel transparent ceramics are typical multi-functional materials with excellent optical, thermal and dielectric properties. ZnAl2O4-Al2O3 ceramics green body were fabricated through aqueous gelcasting forming technique starting from the raw materials of ZnAl2O4 and Al2O3. The stable slurries of ZnAl2O4-Al2O3 with 50vol% solids loading were prepared. Furthermore, the effects of the dispersant, pH value and solid loading on the rheological properties were systematically investigated. Then, gel-casted green compacts were pressureless sintered and hot isostatic pressed to obtain transparent ceramics. Finally, transparent ZnO·2.56Al2O3 ceramics (1.8 mm in thickness) with in-line transmittance value of 70% in visible region and higher than 80% in infrared region were obtained. The samples exhibited Vickers hardness of (11.34±0.17) GPa, Young's modulus of 285 GPa.

Key words: ZnO·2.56Al2O3, transparent ceramics, gel-casting, hot isostatic pressing

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