熔盐改性多孔碳化硅陶瓷的显微结构与性能

王伟; 朱航辉; 冯冬冬; 何文婷; 李红伟

doi:10.11973/jxgccl201606004

熔盐改性多孔碳化硅陶瓷的显微结构与性能

1.
长安大学环境科学与工程学院, 西安 710054
2.
长安大学材料科学与工程学院, 西安 710061

基金项目:

国家自然科学基金资助项目（51202015）

教育部留学回国人员科研启动基金资助项目

陕西省自然科学基金资助项目（2016JM5065）

长安大学中央高校基金资助项目(310829161012)

大学生创新创业训练项目（201510710141）

详细信息

作者简介:
王伟（1975-）, 男, 陕西三原人, 副教授, 博士。

中图分类号: TB321
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出版历程
- 收稿日期: 2016-04-28
- 刊出日期: 2016-06-19

Microstructure and Properties of Porous Silicon Carbide Ceramic Modified with Molten Salts

摘要

摘要: 利用无水硫酸铝和硫酸钠熔盐对多孔碳化硅陶瓷进行了表面改性处理, 研究了熔盐反应后的物相组成和显微结构, 并测试了改性前后多孔碳化硅陶瓷对烟气中PM2.5的过滤性能。结果表明:在900 ℃下, 硫酸铝、硫酸钠熔盐与碳化硅反应生成针状莫来石晶须, 长度达到十几个微米, 直径几百个纳米; 熔盐改性多孔碳化硅陶瓷将柴油烟气中PM2.5质量浓度由大于280 μg·m-3降低到小于150 μg·m-3, 过滤效果优于未改性多孔碳化硅陶瓷的（200 μg·m-3）; 莫来石晶须可以阻挡烟气中颗粒物的运动, 使其沉积在晶须间, 提高了多孔碳化硅陶瓷对烟气的过滤性能。
- 多孔陶瓷 /
- 过滤 /
- 莫来石晶须 /
- 熔盐反应 /
- 表面改性
Abstract: The porous silicon carbide ceramics were surface modified with molten salts of anhydrous aluminum sulfate and sodium sulfate and the phase composition and microstructure after molten salt reaction were studied. The PM2.5 filtering performance of the porous silicon carbide ceramics before and after modification was tested. The results show that the acicular mullite whiskers with lengths of over ten microns and diameters of several hundred nanometers were produced by the reaction of the molten salts of aluminum sulfate and sodium sulfate with silicon carbide at 900 ℃. The mass concentration of PM2.5 in diesel smoke was decreased from over 280 μg·m-3 to less than 150 μg·m-3 after filtration by the molten salt modified porous silicon carbide ceramic, which was better than that by the unmodified porous silicon carbide ceramic (200 μg·m-3). The mullite whiskers can block the movement of the particulate matters in diesel smoke and make them precipitate between whiskers, resulting in the improvement of smoke filtering performance of the porous silicon carbide ceramics.
- porous ceramic /
- filtration /
- mullite whisker /
- molten salt reaction /
- surface modification

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参考文献(19)

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熔盐改性多孔碳化硅陶瓷的显微结构与性能

作者简介: 王伟（1975-）, 男, 陕西三原人, 副教授, 博士。

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出版历程

Microstructure and Properties of Porous Silicon Carbide Ceramic Modified with Molten Salts

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目录

作者简介:
王伟（1975-）, 男, 陕西三原人, 副教授, 博士。