无机材料学报 ›› 2021, Vol. 36 ›› Issue (4): 443-448.DOI: 10.15541/jim20200382

• 研究论文 • 上一篇    

Hf-Si-La-O-N体系中HfN的形成及相关系

刘洋(), 陆有军(), 李彦瑞, 林立群, 袁振侠, 黄振坤   

  1. 北方民族大学 材料科学与工程学院, 银川 750021
  • 收稿日期:2020-07-07 修回日期:2020-08-20 出版日期:2021-04-20 网络出版日期:2020-09-20
  • 通讯作者: 陆有军, 教授. E-mail: youjunlu518@hotmail.com
  • 作者简介:刘 洋(1995-), 男, 硕士研究生. E-mail: Yang.Liu_CN@hotmail.com
  • 基金资助:
    国家自然科学基金(51662002);国家自然科学基金(51762002);宁夏重点研发计划项目(2018YBZD0625);宁夏重点研发计划项目(2019BFH02021)

HfN Formation and Phase Relationships in the Hf-Si-La-O-N System

LIU Yang(), LU Youjun(), LI Yanrui, LIN Liqun, YUAN Zhenxia, HUANG Zhenkun   

  1. School of Materials Science and Engineering, North Minzu University, Yinchuan 750021, China
  • Received:2020-07-07 Revised:2020-08-20 Published:2021-04-20 Online:2020-09-20
  • Contact: LU Youjun, professor. E-mail: youjunlu518@hotmail.com
  • About author:LIU Yang(1995-), male, Master candidate. E-mail: Yang.Liu_CN@hotmail.com
  • Supported by:
    Natural Science Foundation of China(51662002);Natural Science Foundation of China(51762002);Key Research and development plan of Ningxia(2018YBZD0625);Key Research and development plan of Ningxia(2019BFH02021)

摘要:

本研究探讨了一步法制备HfN复合硅酸镧盐陶瓷材料的可行性和配方设计问题, 并对HfO2-Si3N4-La2O3三元系统反应合成HfN进行了实验验证。因为在HfO2-Si3N4-La2O3三元系统的反应过程中涉及到硅酸镧盐Si3N4-SiO2- La2O3系统, 所以将其延伸为HfO2-Si3N4-La2O3-SiO2-HfN (Hf-Si-La-O-N)五元系统, 研究了HfO2-Si3N4二元系统的反应途径以及Hf-Si-La-O-N体系的相关系, 阐明了HfN与系统内镧盐相的共存关系, 并绘制了HfO2-SiO2-La2O3三元系统和Hf-Si-La-O-N五元系统1500 ℃的实验相图, 提出的HfO2-Si3N4-La2O3截面图为HfN复合硅酸镧盐陶瓷材料的配方设计提供了思路。实验发现: HfO2-Si3N4二元系统高温下合成HfN的反应中存在中间产物Hf7O8N4; 引入La2O3促进了系统生成HfN, 并降低了陶瓷烧失率; Hf-Si-La-O-N五元系统内存在HfN与La4.67Si3O13、La5Si3NO12、LaSiNO2、La4Si2N2O7和La2Hf2O7五种镧盐的共存相。

关键词: 氮化铪, 氧化铪-氮化硅-氧化镧, 相关系, 复合物相

Abstract:

In this study, the synthesis is feasibility and formulation design of HfN composite lanthanum silicate ceramics were explored. The feasibility of HfN synthesis by ternary reaction of HfO2-Si3N4-La2O3 system was verified by experiments, and the relationship between reaction pathway of HfO2-Si3N4 binary system and Hf-Si-La-O-N was studied. Considering that the lanthanum silicate salt in the reaction of HfO2-SiO2-La2O3 ternary system was contained in the Si3N4-SiO2-La2O3 system, lanthanum silicate was extended to the HfO2-Si3N4-La2O3-SiO2-HfN (Hf-Si-La-O-N) system, which clarified the coexistence of HfN and the lanthanum salt phases in the system. Experimental phase diagrams of HfO2-SiO2-La2O3 ternary system and Hf-Si-La-O-N system at 1500 ℃ were proposed. The results show that intermediate product Hf7O8N4 formed in the synthesis of HfN at high temperature in HfO2-Si3N4 binary system. Introduction of La2O3 promoted the system to generate HfN which was beneficial to reduce the burning loss rate of ceramics. There existed HfN and La4.67Si3O13, La5Si3NO12, LaSiNO2, La4Si2N2O7, La2Hf2O7 five lanthanum salt phases in the Hf-Si-La-O-N system.

Key words: hafnium nitride, hafnium oxide-silicon nitride-lanthanum oxide, phase relationship, composite phase

中图分类号: