Fabrication of novel SiCN@ZrO2 core-shell ceramic microspheres by using a polymeric precursor

Fabrication of novel SiCN@ZrO2 core-shell ceramic microspheres by using a polymeric precursor
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利用聚合物前驱体制备新型SiCN@ZrO2核壳陶瓷微球

DOI:
10.1080/00150193.2017.1390990
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发表时间:
2017-12
期刊:
影响因子:
0.8
通讯作者:
何翔
何翔
中科院分区:
材料科学4区
文献类型:
--
作者:
刘洪丽;魏宁;张海媛;李婧;何翔

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摘要以聚乙烯硅氮烷(PVSZ)和四丁二氧化锆(ZBT)为原料,采用乳液法制备了新型PVSZ@ZrO2核壳陶瓷微球。将PVSZ@ZrO2核壳微球在500 ~ 1400℃氮气气氛下热解,转化为SiCN@ZrO2陶瓷微球。采用扫描电镜(SEM)、透射电镜(TEM)、能谱仪(EDS)和傅里叶变换红外光谱(FT-IR)对制备的PVSZ@ZrO2核壳微球和SiCN@ZrO2陶瓷微球的尺寸和表面形貌进行了表征。所得SiCN@ZrO2核壳陶瓷微球由ZrO2、β-SiC和Si3N4晶相组成,平均尺寸为0.75 μm。
ABSTRACT A novel type of PVSZ@ZrO2 core-shell ceramic microspheres were fabricated via emulsion technique, using polyvinylsilazane (PVSZ) and zirconium tetrabutoxide (ZBT) as raw materials. The PVSZ@ZrO2 core-shell microspheres were then converted to SiCN@ZrO2 ceramic microspheres through pyrolysis at 500–1400°C under nitrogen atmosphere. The size and the surface morphology of the obtained PVSZ@ZrO2 core-shell microspheres and SiCN@ZrO2 ceramic microspheres were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), and Fourier transform infrared spectroscopy (FT-IR). The resultant SiCN@ZrO2 core-shell ceramic microspheres are composed of ZrO2, β-SiC and Si3N4 crystalline phases, with an average size of 0.75 μm.
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