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Preparation method of novel silicon carbide ceramic precursor
The invention discloses a preparation method of a novel silicon carbide ceramic precursor. The preparation method comprises the following steps: firstly, carrying out olefin metathesis on silane containing (X)nSi(Y)m to obtain (Y)m(Z)nSi(Y)m, wherein X is CH2=CH-CH2- or CH2=CH-, Y is one or more of Cl, Br, I and alkoxy, and Z is one or more of -CH=CH-, CH2=CH-CH2- and -CH2-CH=CH-CH2-, silane containing (Y)m(Z)nSi(Y)m and silane undergo a hydrosilylation reaction so that a first intermediate product is obtained, and the first intermediate product is reduced to obtain a second intermediate product, and the solid is removed to obtain the novel silicon carbide ceramic precursor. According to the method, the content of silicon-hydrogen bonds in polycarbosilane can be increased, the activity ofsilicon-hydrogen can be improved, and the silicon-carbon ratio can be adjusted.
本发明公开了一种新型碳化硅陶瓷先驱体的制备方法，包括先将含有（X）nSi（Y）m的硅烷进行烯烃复分解反应获得（Y）m（Z）nSi（Y）m，其中，X为CH2=CH‑CH2‑或CH2=CH‑，Y为Cl、Br、I、烷氧基中的一种或多种，Z为‑CH=CH‑、CH2=CH‑CH2‑、‑CH2‑CH=CH‑CH2‑中的一种或多种；再将含有（Y）m（Z）nSi（Y）m的硅烷与硅烷通过硅氢加成反应获得第一中间产物；再还原所述第一中间产物制得第二中间产物后，再除去固体从而制得所述新型碳化硅陶瓷先驱体。该方法不仅可以增加聚碳硅烷中硅氢键含量和提高硅氢的活性还可调节硅碳比。
Preparation method of novel silicon carbide ceramic precursor
The invention discloses a preparation method of a novel silicon carbide ceramic precursor. The preparation method comprises the following steps: firstly, carrying out olefin metathesis on silane containing (X)nSi(Y)m to obtain (Y)m(Z)nSi(Y)m, wherein X is CH2=CH-CH2- or CH2=CH-, Y is one or more of Cl, Br, I and alkoxy, and Z is one or more of -CH=CH-, CH2=CH-CH2- and -CH2-CH=CH-CH2-, silane containing (Y)m(Z)nSi(Y)m and silane undergo a hydrosilylation reaction so that a first intermediate product is obtained, and the first intermediate product is reduced to obtain a second intermediate product, and the solid is removed to obtain the novel silicon carbide ceramic precursor. According to the method, the content of silicon-hydrogen bonds in polycarbosilane can be increased, the activity ofsilicon-hydrogen can be improved, and the silicon-carbon ratio can be adjusted.
本发明公开了一种新型碳化硅陶瓷先驱体的制备方法，包括先将含有（X）nSi（Y）m的硅烷进行烯烃复分解反应获得（Y）m（Z）nSi（Y）m，其中，X为CH2=CH‑CH2‑或CH2=CH‑，Y为Cl、Br、I、烷氧基中的一种或多种，Z为‑CH=CH‑、CH2=CH‑CH2‑、‑CH2‑CH=CH‑CH2‑中的一种或多种；再将含有（Y）m（Z）nSi（Y）m的硅烷与硅烷通过硅氢加成反应获得第一中间产物；再还原所述第一中间产物制得第二中间产物后，再除去固体从而制得所述新型碳化硅陶瓷先驱体。该方法不仅可以增加聚碳硅烷中硅氢键含量和提高硅氢的活性还可调节硅碳比。
Preparation method of novel silicon carbide ceramic precursor
一种新型碳化硅陶瓷先驱体的制备方法
GU XISHUANG (author) / ZHOU YONGJIANG (author) / JIA BAOQI (author) / CAO YI (author) / ZHANG XIONGJUN (author) / SHANG LAIDONG (author)
2020-11-13
Patent
Electronic Resource
Chinese
IPC:
C07F
Acyclische, carbocyclische oder heterocyclische Verbindungen, die andere Elemente als Kohlenstoff, Wasserstoff, Halogen, Sauerstoff, Stickstoff, Schwefel, Selen oder Tellur enthalten
,
ACYCLIC, CARBOCYCLIC, OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
/
C04B
Kalk
,
LIME
/
C08G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
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