摘要
纳米陶瓷是由纳米晶粒构成的比传统陶瓷具有更加优良理化性能的陶瓷材料。如何在陶瓷致密化过程中有效控制晶粒长大,从而制备高致密度纳米陶瓷一直是陶瓷制备中的重点和难点。在纳米陶瓷的众多制备方法中,通过压力辅助烧结或快速加热烧结抑制晶粒生长的方法较为普遍,而无压方法烧结作为工艺最为简单和最具商业价值的方法,近年来也受到国内外的广泛关注。本文综述了无压烧结致密纳米陶瓷的研究现状和进展,从纳米粉体的制备、团聚消除、素坯成型、纳米陶瓷烧结等四个方面进行了讨论,评述了目前无压烧结技术所面临的困难并进行了展望,以期为无压烧结技术对高致密度纳米陶瓷的制备提供有益参考。
Full dense ceramics with nanosize grains have extensively important applications due to many excellent properties comparing to conventional ceramics.However,it's a big challenge to fabricate nano-grained ceramics with high relative density.Pressureless sintering is a promising method because of its economy and simple process.The research situation and progress of nano-grained ceramics prepared by pressureless sintering were discussed in this paper.We analyzed several important factors during fabrication process,including synthesis of nanocrystalline powders,elimination of agglomeration,shape-forming method of green pellets,sintering mechanisms and other issues during preparation.
作者
周茂
黄章益
齐建起
何捷
卢铁城
ZHOU Mao;HUANG Zhang-Yi;QI Jian-Qi;HE Jie;LU Tie-Cheng(College of Physical Science and Technology,Sichuan University,Chengdu 610064,China;Key Laboratory of Radiation Physics and Technology ( Ministry of Education)Chengdu 610064,China;Key Laboratory of High Energy Density Physics and Technology (Ministry of Education),Chengdu 610064, China)
出处
《现代技术陶瓷》
CAS
2017年第6期391-411,共21页
Advanced Ceramics
基金
国家自然科学基金(11505122
91326103)
四川省青年科技创新团队(15CXTD0025)
关键词
纳米陶瓷
纳米粉体
无压烧结
Nanograinceramics
Nanopowders
Pressureless sintering
