耐火材料 ›› 2023, Vol. 57 ›› Issue (4): 291-294.DOI: 10.3969/j.issn.1001-1935.2023.04.004

• 研究开发 • 上一篇    下一篇

SiO2添加量对Mg-PSZ陶瓷性能的影响

刘兴刚1), 高昕宇1), 刘涛2), 李玉庆3)   

  1. 1)东北大学 材料科学与工程学院 辽宁沈阳 110819
    2)东北大学 冶金学院 辽宁沈阳 110819
    3)滨州市高级技工学校 山东滨州 256602
  • 收稿日期:2022-07-29 出版日期:2023-08-15 发布日期:2023-08-30
  • 作者简介:刘兴刚:男,1967年生,博士,副教授。E-mail:neuxgliu@126.com
  • 基金资助:
    国家自然科学基金资助项目(51974072)。

Effect of SiO2 addition on properties of Mg-PSZ ceramics

Liu Xinggang, Gao Xinyu, Liu Tao, Li Yuqing   

  1. First author’s address:School of Materials Science & Engineering,Northeastern University,Shenyang 110819,Liaoning,China
  • Received:2022-07-29 Online:2023-08-15 Published:2023-08-30

摘要: 为提高氧化镁部分稳定氧化锆(Mg-PSZ)陶瓷的性能,以ZrO2粉和MgO粉为原料,引入SiO2粉,在 1 600 ℃保温2 h制备了Mg-PSZ陶瓷试样。研究了SiO2添加量(加入质量分数分别为0、0.1%、0.2%、0.3%、0.4%、0.5%)对试样相组成、显微结构、离子电导率、物理性能等的影响。结果表明:1)在Mg-PSZ陶瓷中添加SiO2可以促进m-ZrO2向c-ZrO2的转变,m-ZrO2相的含量越少,气孔和裂纹越少,致密度越高;2)随着SiO2添加量的增加,试样的c-ZrO2相含量、致密度、抗热震性、常温耐压强度和离子电导率先增大后减小。当SiO2添加量为0.4%(w)时,试样的综合性能最好。

关键词: 固体电解质, 氧化镁稳定氧化锆, 二氧化硅, 抗热震性, 离子电导率

Abstract: In order to improve the properties of magnesia partially stabilized zirconia (Mg-PSZ) ceramics,Mg-PSZ ceramic samples were prepared using ZrO2 powder and MgO powder as raw materials,introducing SiO2 powder,and insulating at 1 600 ℃ for 2 h.The effects of the SiO2 addition (mass fraction 0,0.1%,0.2%,0.3%,0.4%,and 0.5%) on the phase composition,microstructure,ionic conductivity and physical properties of the samples were investigated.The results show that:(1)the SiO2 addition in Mg-PSZ ceramics can promote the transition from m-ZrO2 to c-ZrO2;the less the m-ZrO2,the less the pores and cracks,and the higher the density;(2)with the increase of the SiO2 addition,the c-ZrO2 phase content,density,thermal shock resistance,cold compressive strength and ionic conductivity of the samples first increase and then decrease.When the SiO2 addition is 0.4%,the sample has the best comprehensive performance.

Key words: solid electrolyte, magnesia stabilized zirconia, SiO2, thermal shock resistance, ionic conductivity

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