碳化硅多孔陶瓷气孔率和强度影响因素

doi:10.3724/SP.J.1077.2011.00944

无机材料学报 ›› 2011, Vol. 26 ›› Issue (9): 944-948.DOI: 10.3724/SP.J.1077.2011.00944

碳化硅多孔陶瓷气孔率和强度影响因素

李俊峰¹, 林红¹, 李建保^1,2

(1. 清华大学材料科学与工程系, 新型陶瓷与精细工艺国家重点实验室, 北京 100084; 2. 海南大学材料与化工学院, 海口 570228)

收稿日期:2010-10-25 修回日期:2011-01-17 出版日期:2011-09-20 网络出版日期:2011-08-19
作者简介:李俊峰(1981-), 男, 博士研究生. E-mail: lijf06@mail.tsinghua.edu.cn
基金资助:
科技部863项目(2007AA03Z524); 教育部博士点基金(20090002110010)

Influence Factors on the Porosity and Strength of SiC Porous Ceramic

LI Jun-Feng¹, LIN Hong¹, LI Jian-Bao^{1, 2}

(1. State Key Laboratory of New Ceramics & Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China; 2. Materials and Chemical Engineering Institute, Hainan University, Haikou 570228, China)

Received:2010-10-25 Revised:2011-01-17 Published:2011-09-20 Online:2011-08-19
Supported by:
863 program (2007AA03Z524); Research Fund for the Doctoral Program of Higher Education of China (20090002110010)

摘要/Abstract

摘要： 研究了陶瓷粘结剂含量、碳化硅颗粒粒径以及烧结温度对高温气体过滤用碳化硅多孔陶瓷抗弯强度和气孔率的影响. 利用X射线衍射测试了多孔陶瓷烧结后的物相组成. 陶瓷粘结剂含量的增加使碳化硅多孔陶瓷的气孔率快速下降, 在陶瓷粘结剂含量15wt%时, 碳化硅多孔陶瓷可具有较高的气孔率(37.5%)和抗弯强度(27.63MPa). 随着碳化硅颗粒粒径从300?m减少到87um, 碳化硅多孔陶瓷的气孔率和抗弯强度可同时提高, 气孔率从35.5%增加到了42.4%, 而抗弯强度从19.92MPa增加到了25.18MPa. 碳化硅多孔陶瓷的烧结温度从1300℃增加到1400℃过程中, 其气孔率从38.7%迅速下降到35.4%, 而其抗弯强度一直在27MPa左右, 没有大幅变化, 所以该多孔陶瓷的烧结温度应该选在陶瓷粘结剂熔点(1300℃)附近, 不宜过高.

关键词: 碳化硅多孔陶瓷, 过滤, 抗弯强度, 气孔率

Abstract: The influence of ceramic binder contents, SiC particle sizes, and sintering temperatures on the porosity and flexural strength of SiC porous ceramics for high-temperature gas filtration were investigated. The composition of SiC porous ceramics was measured by X-ray diffraction. The porosity of SiC porous ceramics decreased with increasing the ceramic binder contents, and the SiC porous ceramic with a relatively high porosity of 37.5% and flexural strength of 27.63MPa was obtained with ceramic binder content of 15wt%. Both the porosity and flexural strength of SiC porous ceramics increased with SiC particle sizes decreasing from 300um to 87um, and the porosity increased from 35.5% to 42.4%, while the flexural strength increased from 19.92MPa to 25.18MPa. In addition, the porosity of SiC porous ceramics quickly decreased from 38.7% to 35.4% with sintering temperatures increasing from 1300℃ to 1400℃, but the flexural strength of SiC porous ceramics had only a slight change, mainly standing at about 27MPa. Thus, the sintering temperature of SiC porous ceramics should be selected around the melting point of ceramic binder (1300℃).

Key words: SiC porous ceramics, filtration, flexural strength, porosity

中图分类号:

TQ174

李俊峰, 林红, 李建保. 碳化硅多孔陶瓷气孔率和强度影响因素[J]. 无机材料学报, 2011, 26(9): 944-948.

LI Jun-Feng, LIN Hong, LI Jian-Bao. Influence Factors on the Porosity and Strength of SiC Porous Ceramic[J]. Journal of Inorganic Materials, 2011, 26(9): 944-948.

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碳化硅多孔陶瓷气孔率和强度影响因素

Influence Factors on the Porosity and Strength of SiC Porous Ceramic

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