耐火材料

耐火材料 ›› 2026, Vol. 60 ›› Issue (2): 98-102.DOI: 10.3969/j.issn.1001-1935.2026.02.002

• 研究开发 • 上一篇    下一篇

六铝酸钙-镁铝尖晶石复相材料的制备及性能研究

刘兴颜1,2), 陈平安1,2), 乔梦珂1,2), 陈浮1,2), 吴江1,2), 李享成1,2)   

  1. 1)武汉科技大学 先进耐火材料全国重点试验室 湖北武汉 430081
    2)武汉科技大学 高温电磁材料与结构教育部重点试验室 湖北武汉 430081
  • 收稿日期:2025-05-13 出版日期:2026-04-15 发布日期:2026-04-15
  • 通讯作者: 陈平安,男,1986年生,博士,教授。E-mail:pinganchen@wust.edu.cn
  • 作者简介:刘兴颜:女,2000年生,硕士研究生。E-mail:1359358870@qq.com
  • 基金资助:
    国家重点研发计划资助项目(2024YFB3714600);湖北省重大科技攻关项目(JD 2023BAA003);国家自然科学基金项目(52304410和51972242);湖北省青年拔尖人才培养计划资助。

Preparation and properties of CA6-MA composite materials

Liu Xingyan, Chen Ping’an, Qiao Mengke, Chen Fu, Wu Jiang, Li Xiangcheng   

  1. First author’s address:State Key Laboratory of Advanced Refractories,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China
  • Received:2025-05-13 Online:2026-04-15 Published:2026-04-15

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摘要： 为解决六铝酸钙-镁铝尖晶石复相材料烧结温度高、力学强度低的瓶颈问题,以六铝酸钙(CA6)粉、镁铝尖晶石(MA)粉和ρ-Al2O3粉为原料,经1 600 ℃保温5 h热处理制备CA6-MA复相材料。研究MA粉的添加量(固定CA6粉+MA粉总质量分数为100%,MA粉的质量分数分别为10%、30%、50%、100%)和ρ-Al2O3粉添加量(CA6粉+MA粉总质量的10%、50%、70%、100%、150%、200%)对该材料显微结构和性能的影响。结果表明:提高MA粉的添加量有助于提高材料的致密化程度,提高ρ-Al2O3粉的添加量可以提高材料的致密度和力学强度,当MA粉的添加量为50%(w)、ρ-Al2O3粉的添加量为150%(w)时,试样的综合性能最佳,体积密度为2.80 g·cm-3,显气孔率为26.7%,线收缩率为18.4%,常温抗折强度为 72.5 MPa,常温耐压强度为510 MPa。

关键词: CA6-MA复相材料, 常温耐压强度, 孔径分布, 显微结构

Abstract: To solve the bottleneck problems of high sintering temperature and low mechanical strength of calcium hexaluminate (CA6)-magnesium aluminate spinel (MA) composite materials,CA6 powder,MA spinel powder and ρ-Al2O3 powder were used as raw materials to prepare CA6-MA composite materials by heat treating at 1 600 ℃ for 5 h.The effects of the MA powder addition (the total mass fraction of CA6 powder+MA powder was fixed at 100%,and the mass fractions of MA powder were 10%,30%,50% and 100%,respectively) and ρ-Al2O3 addition (10%,50%,70%,100%,150% and 200% of the total mass of CA6 powder+MA powder) on the microstructure and properties of the materials were investigated.The results show that:(1)increasing the MA powder addition is beneficial to improving the densification of materials;(2)increasing the ρ-Al2O3 powder addition can improve the density and strength of the materials;when the MA powder addition is 50% and the ρ-Al2O3 powder addition is 150%,the sample exhibits the optimal comprehensive properties,with bulk density of 2.80 g·cm-3,apparent porosity of 26.7%,linear shrinkage of 18.4%,cold modulus of rupture of 72.5 MPa,and cold compressive strength of 510 MPa.

Key words: CA6-MA composite materials, cold compressive strength, pore size distribution, microstructure

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