轻烧MgO粉对凝胶注模法制备MgAl2O4多孔陶瓷性能的影响

doi:10.3969/j.issn.1001-1935.2024.01.008

耐火材料 ›› 2024, Vol. 58 ›› Issue (1): 40-43.DOI: 10.3969/j.issn.1001-1935.2024.01.008

轻烧MgO粉对凝胶注模法制备MgAl₂O₄多孔陶瓷性能的影响

朴佳思^1,2), 杜庆洋¹⁾, 唐钰栋²⁾, 白佳海¹⁾

1)山东理工大学材料科学与工程学院山东淄博 255049
2)山东工业陶瓷研究设计院有限公司山东淄博 255049

收稿日期:2023-05-23 出版日期:2024-02-15 发布日期:2024-02-28
作者简介:朴佳思:女,1997年生,硕士。E-mail:1597180588@qq.com
基金资助:
山东省自然科学基金资助项目(ZR2019MEM045)。

Effect of light burnt MgO powder on properties of porous MgAl₂O₄ ceramics by gel-casting route

Piao Jiasi, Du Qingyang, Tang Yudong, Bai Jiahai

First author's address: School of Materials Science and Engineering,Shandong University of Technology,Zibo 255049,Shandong,China

Received:2023-05-23 Online:2024-02-15 Published:2024-02-28

摘要/Abstract

摘要： 为了降低原料成本,简化工艺流程,提高MgAl₂O₄多孔陶瓷的性能,将Al₂O₃粉和MgO粉于1 500 ℃保温2 h合成了MgAl₂O₄粉体,再外加轻烧MgO粉(外加质量分数分别为0.5%、1.0%、1.5%和2.0%),采用凝胶注模法于1 500 ℃保温2 h制备了MgAl₂O₄多孔陶瓷,研究轻烧MgO粉外加量对MgAl₂O₄多孔陶瓷结构和性能的影响。结果表明:1)以轻烧MgO粉作为固化剂制备的MgAl₂O₄多孔陶瓷烧后线收缩率较小,具有较好的尺寸稳定性,且孔径主要分布在0.5~2.0 μm;2)随着轻烧MgO粉外加量的增加,MgAl₂O₄多孔陶瓷的显气孔率和气通量增加,显微结构较均匀;3)当轻烧MgO粉外加量(w)为2.0%时,MgAl₂O₄多孔陶瓷的综合性能最佳。

关键词: MgAl₂O₄多孔陶瓷, 凝胶注模法, 轻烧MgO粉, 显微结构

Abstract: In order to reduce the raw materials cost,simplify the process,and improve the performance of porous MgAl₂O₄ ceramics,MgAl₂O₄ powders were synthesized using Al₂O₃ powder and MgO powder at 1 500 ℃ for 2 h,and then light burnt MgO powders (0.5%,1.0%,1.5% and 2.0%,by mass) were extrally added to prepare porous MgAl₂O₄ ceramics using the gel-casting route at 1 500 ℃ for 2 h.Effect of the light burnt MgO powder addition on the structure and performance of porous MgAl₂O₄ ceramics were investigated.The results show that:(1)the porous MgAl₂O₄ ceramics prepared using light burnt MgO powder as a hardener have small linear shrinkage and good volume stability,whose pore size is mainly in the range of 0.5-2.0 μm;(2)as the light burnt MgO powder addition increases,the apparent porosity and the gas flux increase,and the microstructure is uniform;(3)when the light burnt MgO powder addition is 2.0%,porous MgAl₂O₄ ceramics show the optimal comprehensive performance.

Key words: porous MgAl₂O₄ ceramics, gel-casting route, light burnt MgO powder, microstructure

中图分类号:

TQ175

朴佳思, 杜庆洋, 唐钰栋, 白佳海. 轻烧MgO粉对凝胶注模法制备MgAl₂O₄多孔陶瓷性能的影响[J]. 耐火材料, 2024, 58(1): 40-43.

Piao Jiasi, Du Qingyang, Tang Yudong, Bai Jiahai. Effect of light burnt MgO powder on properties of porous MgAl₂O₄ ceramics by gel-casting route[J]. Refractories, 2024, 58(1): 40-43.

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轻烧MgO粉对凝胶注模法制备MgAl₂O₄多孔陶瓷性能的影响

Effect of light burnt MgO powder on properties of porous MgAl₂O₄ ceramics by gel-casting route

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