Preparation method and application of ferrocenyl silicone ceramic

Abstract

The invention belongs to the field of ceramic materials, and particularly relates to a preparation method and application of a ferrocenyl silicone ceramic. The preparation method comprises the steps:synthesizing a high-activity ferrocenyl dilithium salt from n-butyl lithium and ferrocene through the lithiation property of n-butyl lithium at a low temperature, performing a reaction further betweenthe ferrocenyl dilithium salt and dimethyl monochlorosilane so as to form monomer ferrocenyldimethylsilane, then performing a Piers-Rubinsztajn reaction for polymerization with tetraethyl orthosilicate so as to obtain a silicone polymer precursor, and then performing high temperature sintering so as to obtain the ferrocenyl silicone ceramic (Fe-Si-C). The prepared ferrocenyl silicone ceramic (Fe-Si-C) precursor has a hyperbranched topological structure, good solubility and high ceramic yield; and due to introduction of transition metal Fe, the ceramic not only has certain electromagnetic properties, but also has good catalytic properties, and can be applied to electromagnetic materials and catalytic materials.

Description

technical field [0001] The invention belongs to the field of ceramic materials, and in particular relates to a preparation method and application of a ferrocene-based organosilicon ceramic. Background technique [0002] Silicon carbide (SiC) ceramics have excellent properties such as high strength, high modulus, high temperature resistance, oxidation resistance, wear resistance and chemical corrosion resistance, and are widely used in many fields such as aviation, aerospace and weaponry. The introduction of heterogeneous metal elements will not only improve the high temperature resistance and oxidation resistance of SiC ceramics, but also make them have better magnetic properties, electrical properties or catalytic properties, which can effectively broaden the application fields of SiC ceramics. [0003] Metal-organic polymers as ceramic precursors are a very efficient and advanced method for preparing ceramics with different functions. Metal-organic polymers not only have ...

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Problems solved by technology

However, the linear PFS has a low ceramic yield and is not suitable for use as a ceramic precursor

In order to improve the ceramic yield of PFS, there are two common ways: 1. Make the Si atoms contain active substituents, such as hydrogen and vinyl, which are cross-linked during the pyrolysis process, thereby improving its ceramic yield. 2. directly synthesize the ferrocene-based polymer of network structure to improve its ceramic yield, such as highly branched polyferrocenyl silane, although highly branched polyferrocenyl silane has a higher Ceramic productivity, but its solubility is significantly reduced or even insoluble, which affects its processing performance as a precursor, and it cannot be an ideal precursor of ferrocene-based organosilicon ceramics

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