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Ultrahigh-temperature ceramic precursor as well as preparation method and application thereof
The invention belongs to the technical field of ceramic materials, and particularly relates to an ultrahigh-temperature ceramic precursor and a preparation method and application thereof. The invention relates to an ultrahigh-temperature ceramic precursor, the structural formula of which is # imgabs0 #, and the value of m is 2-25; m is a refractory metal element. The preparation method comprises the following steps: by taking a bisphenol-containing aromatic compound, a silicon-containing compound and a metallocene compound as monomers, and triethylamine as a catalyst and an acid-binding agent, improving the reaction activity of phenolic groups, and realizing a polycondensation substitution reaction of-OH and Si-Cl or Zr-Cl through a polycondensation reaction to form a precursor connected through Si-O or Zr-O bonds; different organic silicon polymers are obtained by adjusting refractory metal elements on a main chain and the content ratio of the refractory metal elements to silicon elements, and the organic silicon polymers are rich in variety and good in thermal stability.
本发明属于陶瓷材料技术领域，特别涉及一种超高温陶瓷前驱体及其制备方法和应用。一种超高温陶瓷前驱体，其结构式为：#imgabs0#其中，m的取值为2‑25；M为难熔金属元素。本发明以含双酚基的芳香族化合物、含硅化合物以及茂金属化合物为单体，以三乙胺为催化剂和缚酸剂，提高酚基的反应活性，通过缩聚反应，实现‑OH与Si‑Cl或Zr‑Cl的缩聚取代反应，形成通过Si‑O或Zr‑O键连接起来的前驱体，通过调节主链上难熔金属元素以及难熔金属元素与硅元素的含量比来得到不同的有机硅聚合物，种类丰富且热稳定性好。
Ultrahigh-temperature ceramic precursor as well as preparation method and application thereof
The invention belongs to the technical field of ceramic materials, and particularly relates to an ultrahigh-temperature ceramic precursor and a preparation method and application thereof. The invention relates to an ultrahigh-temperature ceramic precursor, the structural formula of which is # imgabs0 #, and the value of m is 2-25; m is a refractory metal element. The preparation method comprises the following steps: by taking a bisphenol-containing aromatic compound, a silicon-containing compound and a metallocene compound as monomers, and triethylamine as a catalyst and an acid-binding agent, improving the reaction activity of phenolic groups, and realizing a polycondensation substitution reaction of-OH and Si-Cl or Zr-Cl through a polycondensation reaction to form a precursor connected through Si-O or Zr-O bonds; different organic silicon polymers are obtained by adjusting refractory metal elements on a main chain and the content ratio of the refractory metal elements to silicon elements, and the organic silicon polymers are rich in variety and good in thermal stability.
本发明属于陶瓷材料技术领域，特别涉及一种超高温陶瓷前驱体及其制备方法和应用。一种超高温陶瓷前驱体，其结构式为：#imgabs0#其中，m的取值为2‑25；M为难熔金属元素。本发明以含双酚基的芳香族化合物、含硅化合物以及茂金属化合物为单体，以三乙胺为催化剂和缚酸剂，提高酚基的反应活性，通过缩聚反应，实现‑OH与Si‑Cl或Zr‑Cl的缩聚取代反应，形成通过Si‑O或Zr‑O键连接起来的前驱体，通过调节主链上难熔金属元素以及难熔金属元素与硅元素的含量比来得到不同的有机硅聚合物，种类丰富且热稳定性好。
Ultrahigh-temperature ceramic precursor as well as preparation method and application thereof
一种超高温陶瓷前驱体及其制备方法和应用
LI BIN (author) / WANG CAIYAN (author) / SHI LEI (author)
2023-12-29
Patent
Electronic Resource
Chinese
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