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材料工程  2017, Vol. 45 Issue (5): 7-12    DOI: 10.11868/j.issn.1001-4381.2015.000641
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
SiO2/SiCN核壳陶瓷微球的制备及表征
张海媛1,2, 刘洪丽1,2, 李婧2, 康伟2
1. 天津市软土特性与工程环境重点实验室, 天津 300384;
2. 天津城建大学 材料科学与工程学院, 天津 300384
Preparation and Characterization of SiO2/SiCN Core-shell Ceramic Microspheres
ZHANG Hai-yuan1,2, LIU Hong-li1,2, LI Jing2, KANG Wei2
1. Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment, Tianjin 300384, China;
2. School of Materials Science and Engineering, Tianjin Chengjian University, Tianjin 300384, China
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摘要 采用乳液技术和先驱体转化法相结合,利用改性后SiO2颗粒表面的双键引发聚硅氮烷(PSN)原位聚合,得到SiO2/PSN核壳结构微球,经高温裂解过程成功制备SiO2/SiCN核壳陶瓷微球。研究SiO2与PSN原料的质量比、固化时间和热解温度对核壳微球形成过程和形貌的影响,并采用SEM,EDS,TEM,FT-IR,XRD对微球的微观形貌、化学成分及物相进行表征。结果表明:SiO2与PSN质量比为1:4时,200℃固化4h得到表面颗粒分布均一、包覆完全的SiO2/PSN核壳微球;经800~1200℃热处理后,得到能保持原来形貌的非晶态SiO2/SiCN核壳陶瓷微球;1400℃热解产物发生结晶,生成了SiO2,SiC和Si3N4晶相。
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张海媛
刘洪丽
李婧
康伟
关键词 聚硅氮烷乳液法先驱体转化法核壳陶瓷微球    
Abstract:The SiO2/PSN core-shell microspheres were prepared via an emulsion reaction combined with the polymer-derived ceramics (PDCs) method using polysilazane (PSN) in situ polymerization on the surface of SiO2 modified by silane coupling agents MPS, followed by pyrolysis process to obtain SiO2/SiCN core-shell ceramic microspheres. The effects of raw mass ratio, curing time and pyrolysis temperature on the formation and the morphology of core-shell microspheres were studied. The morphology, chemical composition and phase transformation were characterized by SEM, EDS, TEM, FT-IR and XRD. The results show that after reaction for 4h at 200℃, SiO2 completely coated PSN forms a core-shell microsphere with rough surface when the mass ratio of SiO2 and PSN is 1:4; when pyrolysis temperature is at 800-1200℃, amorphous SiO2/SiCN core-shell ceramic microspheres are prepared; at 1400℃, the amorphous phase partially crystallizes to produce SiO2, SiC and Si3N4 phase.
Key wordspolysilazane    emulsion method    polymer-derived ceramics method    core-shell ceramic microsphere
收稿日期: 2015-09-10      出版日期: 2017-05-17
中图分类号:  TQ174  
通讯作者: 刘洪丽(1971-),女,教授,博士,主要从事隔热、高性能阻燃材料等方面的研究工作,联系地址:天津城建大学材料科学与工程学院(300384),E-mail:liuhonglitianjin@163.com     E-mail: liuhonglitianjin@163.com
引用本文:   
张海媛, 刘洪丽, 李婧, 康伟. SiO2/SiCN核壳陶瓷微球的制备及表征[J]. 材料工程, 2017, 45(5): 7-12.
ZHANG Hai-yuan, LIU Hong-li, LI Jing, KANG Wei. Preparation and Characterization of SiO2/SiCN Core-shell Ceramic Microspheres. Journal of Materials Engineering, 2017, 45(5): 7-12.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.000641      或      http://jme.biam.ac.cn/CN/Y2017/V45/I5/7
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