Low-cost liquid SiC precursor for SiC ceramic-based composite material and preparation method of low-cost liquid SiC precursor

The invention discloses a low-cost liquid SiC precursor for a SiC ceramic-based composite material and a preparation method thereof, the preparation method comprises the following steps: taking phenyl dichlorosilane and dihalogenated alkane as polymeric monomers, carrying out dechlorination polymerization reaction under the action of alkali metal, and then utilizing chlorosilane and alcohol substances to react with the polymeric monomers to improve the molecular weight and branching degree of the polymeric monomers, so as to obtain the low-cost liquid SiC precursor for the SiC ceramic-based composite material. And finally, removing the solvent by adopting a reduced pressure distillation method to obtain the liquid SiC precursor. The liquid SiC precursor is prepared by adopting simple reaction steps, the cost is low, the product performance is excellent, and the method is suitable for preparing the SiC ceramic-based composite material. 本发明公开了一种SiC陶瓷基复合材料用低成本液态SiC前驱体及制备方法，制备方法包括将苯基二氯硅烷和二卤代烷烃作为聚合单体，在碱金属的作用下发生脱氯聚