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Low-oxygen liquid SiHfBCN ceramic precursor, preparation method and SiHfBCN ceramic
The invention relates to a novel low-oxygen liquid SiHfBCN ceramic precursor and a preparation method thereof. A SiBCN precursor and a hafnium precursor are dissolved in an organic solvent to form a homogeneous solution, a free radical initiator is added, heating is performed to initiate a free radical polymerization reaction of double bonds between the two precursors, and heating or vacuumizing is performed to remove the solvent to obtain viscous liquid, namely a SiHfBCN ceramic precursor. After the SiHfBCN ceramic precursor is subjected to pyrolysis treatment, homogeneous SiHfBCN ceramic canbe obtained. According to the method, the problem of poor solubility of the hafnium precursor is solved, meanwhile, a silicon-hafnium-boron-carbon-nitrogen precursor is prepared through free radicalpolymerization of unsaturated bonds, introduction of an oxygen element is avoided, no byproduct is generated, the preparation process is simple, and the problem that a traditional refractory metal hafnium compound is high in preparation temperature and difficult to sinter is solved.
本发明涉及一种新型低氧、液态SiHfBCN陶瓷前驱体及其制备方法，利用有机溶剂将SiBCN前驱体和铪前驱体溶解，形成均一溶液，加入自由基引发剂，加热引发两种前驱体间双键的自由基聚合反应，加热或抽真空除去溶剂得到粘稠状液体即为SiHfBCN陶瓷前驱体，SiHfBCN陶瓷前驱体经热解处理后可得到均相的SiHfBCN陶瓷，本发明解决了铪前驱体溶解性差的问题，同时利用不饱和键的自由基聚合制备硅铪硼碳氮前驱体避免氧元素的引入，无副产物产生，制备工艺简单，且该法避免了传统难熔金属铪化物制备温度高，烧结困难的问题。
Low-oxygen liquid SiHfBCN ceramic precursor, preparation method and SiHfBCN ceramic
The invention relates to a novel low-oxygen liquid SiHfBCN ceramic precursor and a preparation method thereof. A SiBCN precursor and a hafnium precursor are dissolved in an organic solvent to form a homogeneous solution, a free radical initiator is added, heating is performed to initiate a free radical polymerization reaction of double bonds between the two precursors, and heating or vacuumizing is performed to remove the solvent to obtain viscous liquid, namely a SiHfBCN ceramic precursor. After the SiHfBCN ceramic precursor is subjected to pyrolysis treatment, homogeneous SiHfBCN ceramic canbe obtained. According to the method, the problem of poor solubility of the hafnium precursor is solved, meanwhile, a silicon-hafnium-boron-carbon-nitrogen precursor is prepared through free radicalpolymerization of unsaturated bonds, introduction of an oxygen element is avoided, no byproduct is generated, the preparation process is simple, and the problem that a traditional refractory metal hafnium compound is high in preparation temperature and difficult to sinter is solved.
本发明涉及一种新型低氧、液态SiHfBCN陶瓷前驱体及其制备方法，利用有机溶剂将SiBCN前驱体和铪前驱体溶解，形成均一溶液，加入自由基引发剂，加热引发两种前驱体间双键的自由基聚合反应，加热或抽真空除去溶剂得到粘稠状液体即为SiHfBCN陶瓷前驱体，SiHfBCN陶瓷前驱体经热解处理后可得到均相的SiHfBCN陶瓷，本发明解决了铪前驱体溶解性差的问题，同时利用不饱和键的自由基聚合制备硅铪硼碳氮前驱体避免氧元素的引入，无副产物产生，制备工艺简单，且该法避免了传统难熔金属铪化物制备温度高，烧结困难的问题。
Low-oxygen liquid SiHfBCN ceramic precursor, preparation method and SiHfBCN ceramic
一种低氧液态SiHfBCN陶瓷前驱体、制备方法及SiHfBCN陶瓷
FENG ZHIHAI (author) / XU YIFEN (author) / HU JIDONG (author) / FENG XIANG (author) / TIAN YUELONG (author) / LI YUAN (author)
2020-07-10
Patent
Electronic Resource
Chinese
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