耐火材料 ›› 2023, Vol. 57 ›› Issue (5): 407-411.DOI: 10.3969/j.issn.1001-1935.2023.05.007

• 研究开发 • 上一篇    下一篇

烧结助剂对锆酸钙材料性能的影响

路跃1), 刘国齐1), 杨文刚1), 燕鹏飞2), 马渭奎1), 李红霞1)   

  1. 1)中钢集团洛阳耐火材料研究院有限公司 先进耐火材料国家重点实验室 河南洛阳 471039
    2)山西沁新能源集团股份有限公司 山西长治 046500
  • 收稿日期:2023-06-23 出版日期:2023-10-15 发布日期:2023-10-26
  • 通讯作者: 李红霞,女,1965年生,博士,正高级工程师。E-mail:lihongx0622@126.com
  • 作者简介:路跃:女,1996年生,硕士研究生。E-mail:innocence@126.com
  • 基金资助:
    国家重点研发计划(2021YFB3701400);国家自然科学基金(51932008);中原科技创新领军人才(204200510011)。

Effect of sintering agent on properties of calcium zirconate materials

Lu Yue, Liu Guoqi, Yang Wengang, Yan Pengfei, Ma Weikui, Li Hongxia   

  1. First author's address: State Key Laboratory of Advanced Refractories,Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,Henan,China
  • Received:2023-06-23 Online:2023-10-15 Published:2023-10-26

摘要: 锆酸钙材料是一种具有潜在应用前景的高温合金熔炼用坩埚材料,以电熔锆酸钙(CaZrO3)为主原料,添加少量(加入质量分数为0.5%~2.0%)的TiO2、Al2O3、La2O3、CeO2、Y2O3粉体作为烧结助剂,在150 MPa下压制成30 mm×7 mm的坯体,经1 650 ℃保温3 h烧成。研究了烧结助剂种类及其加入量对锆酸钙材料烧结程度、物相组成及显微结构的影响。结果表明:1)添加2%(w)TiO2时试样烧结性能最优,这是由于发生固溶反应促进了材料的烧结;2)Al2O3的加入量为1%(w)较适宜,由于产生液相促进了材料的烧结,烧后试样中平均晶粒尺寸为 10~30 μm;3)Y2O3的加入量为0.5%(w)较适宜,由于发生固溶反应促进了材料的烧结,烧后试样中平均晶粒尺寸为10~50 μm。

关键词: 锆酸钙, 烧结助剂, 相对密度, 晶粒尺寸

Abstract: Calcium zirconate material is a crucible material for high temperature alloy melting with potential application prospects.The crucibles with dimensions of 30 mm×7 mm were prepared using fused calcium zirconate (CaZrO3) as the main raw material,adding a small amount (0.5%-2%,by mass) of TiO2,Al2O3,La2O3,CeO2,and Y2O3 powders as the sintering agents,pressing under 150 MPa,and sintering at 1 650 ℃ for 3 h.Effects of the type and addition of sintering agents on the sintering degree,phase composition and microstructure of calcium zirconate materials were studied.The results show that:(1)the sintering performance of the sample with 2% TiO2 is the best because the sintering of the material is promoted due to the solid solution reaction;(2)the suitable addition of Al2O3 is 1% because the formed liquid phase promotes the sintering of the material and the average grain size in the sample after sintering is 10-30 μm;(3)the suitable addition of Y2O3 is 0.5% because the solid solution reaction promotes the material sintering and the average grain size in the sample after sintering is 10-50 μm.

Key words: calcium zirconate, sintering agent, relative density, grain size

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