金属离子和柠檬酸的配比对Y2O3-MgO纳米粉体及其纳米复相陶瓷性能的影响

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (5): 1788-1796.

金属离子和柠檬酸的配比对Y₂O₃-MgO纳米粉体及其纳米复相陶瓷性能的影响

陈冠宇^1,2, 吴南³, 杨康^1,2, 王元帅^1,2, 孙旭东^1,2,4, 李晓东^1,2

1.东北大学材料科学与工程学院,沈阳 110819;
2.东北大学材料各向异性与织构教育部重点实验室,沈阳 110819;
3.沈阳大学机械工程学院,沈阳 110044;
4.东北大学佛山研究生院,佛山 528311

收稿日期:2022-01-15 修回日期:2022-03-02 出版日期:2022-05-15 发布日期:2022-06-01
通讯作者: 李晓东,博士,教授。E-mail:xdli@mail.neu.edu.cn
作者简介:陈冠宇(1997—),男,硕士研究生。主要从事复相陶瓷的研究。E-mail:gychen@stumail.neu.edu.cn
基金资助:
国家重点研发计划项目(2017YFB0310300);教育部基本科研业务费(N180212009);国家自然科学基金(51872033)

Effect of Ratio of Metal Ions to Citric Acid on Properties of Y₂O₃-MgO Nano-Powders and Ceramic Nano Composites

CHEN Guanyu^1,2, WU Nan³, YANG Kang^1,2, WANG Yuanshuai^1,2, SUN Xudong^1,2,4, LI Xiaodong^1,2

1. School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China;
2. Key Laboratory for Anisotropy and Texture of Materials Ministry of Education, Northeastern University, Shenyang 110819, China;
3. School of Mechanical Engineering, Shenyang University, Shenyang 110044, China;
4. Foshan Graduate School, Northeastern University, Foshan 528311, China

Received:2022-01-15 Revised:2022-03-02 Online:2022-05-15 Published:2022-06-01

摘要/Abstract

摘要： 纳米粉体的团聚程度影响纳米复相陶瓷的微观结构,进而影响其光学与力学性能。本文采用溶胶-凝胶法合成Y₂O₃-MgO纳米粉体,结合热压烧结(HP)技术制备出光学及力学性能优异的Y₂O₃-MgO复相陶瓷。研究了前驱体中金属离子与柠檬酸的摩尔比(m/c)对纳米粉体团聚程度及复相陶瓷显微结构、光学及力学性能的影响。研究结果表明,当金属离子和柠檬酸摩尔比为0.75时,粉体团聚程度最低,该粉体经过热压烧结后制备出的Y₂O₃-MgO陶瓷具有均匀的相域,晶粒尺寸约为140 nm,3~6 μm波段的透过率达到80%,维氏硬度及断裂韧性分别为10.90 GPa、2.21 MPa·m^-1/2,抗弯强度为226 MPa。

关键词: 纳米粉体, 透明陶瓷, 纳米复相陶瓷, Y₂O₃-MgO, 团聚程度, 溶胶-凝胶, 热压烧结, 柠檬酸

Abstract: The agglomeration state of nano-powders affects the microstructure of ceramic nano composites, and hence its optical and mechanical properties. In this paper, Y₂O₃-MgO nano-powder was synthesized by sol-gel method. Y₂O₃-MgO nano composites with excellent optical and mechanical properties were prepared by using hot pressing sintering (HP). The effects of the molar ratio of metal ions to citric acid (m/c) in the precursor on the agglomeration state of nano-powders and the optical and mechanical properties of the nano composites were studied. For the molar ratio of metal ions to citric acid of 0.75, the agglomeration state of the powder is the lowest. Y₂O₃-MgO nano composites prepared by hot-pressing sintering have an uniform phase domain, an average grain size of 140 nm, and an in-line transmittance of 80% within 3~6 μm wavelength range. Vickers hardness, fracture toughness and bending strength are 10.90 GPa, 2.21 MPa·m^-1/2 and 226 MPa, respectively.

Key words: nano-powder, transparent ceramics, ceramic nano composite, Y₂O₃-MgO, agglomeration state, sol-gel, hot pressing sintering, citric acid

中图分类号:

TQ174

陈冠宇, 吴南, 杨康, 王元帅, 孙旭东, 李晓东. 金属离子和柠檬酸的配比对Y₂O₃-MgO纳米粉体及其纳米复相陶瓷性能的影响[J]. 硅酸盐通报, 2022, 41(5): 1788-1796.

CHEN Guanyu, WU Nan, YANG Kang, WANG Yuanshuai, SUN Xudong, LI Xiaodong. Effect of Ratio of Metal Ions to Citric Acid on Properties of Y₂O₃-MgO Nano-Powders and Ceramic Nano Composites[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(5): 1788-1796.

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金属离子和柠檬酸的配比对Y₂O₃-MgO纳米粉体及其纳米复相陶瓷性能的影响

Effect of Ratio of Metal Ions to Citric Acid on Properties of Y₂O₃-MgO Nano-Powders and Ceramic Nano Composites

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