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A kind of preparation method of sol-gel synthesis sizrboc ceramics

A technology of sol-gel method and ceramics is applied in the field of preparation of SiZrBOC ceramics synthesized by sol-gel method, which can solve problems such as poor thermal stability, and achieve the effects of good high temperature stability and high weight loss rate

Active Publication Date: 2022-07-26
HEILONGJIANG UNIV
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Problems solved by technology

[0003] The present invention will solve the existing technical problem of poor thermal stability in the SiZrBOC precursor crosslinking process, and provide a preparation method for SiZrBOC ceramics synthesized by sol-gel method

Method used

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  • A kind of preparation method of sol-gel synthesis sizrboc ceramics
  • A kind of preparation method of sol-gel synthesis sizrboc ceramics
  • A kind of preparation method of sol-gel synthesis sizrboc ceramics

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specific Embodiment approach 1

[0025] Embodiment 1: The present embodiment is a preparation method for synthesizing SiZrBOC ceramics by sol-gel method, which is specifically carried out according to the following steps:

[0026] 1. Add methylvinyldichlorosilane into toluene and stir in an ice bath to obtain solution A;

[0027] 2. Adding borane dimethyl sulfide to the solution A obtained in step 1, and stirring at room temperature to form solution B;

[0028] 3. The solution B obtained in step 2 is subjected to vacuum distillation to obtain an intermediate product;

[0029] 4. adding the intermediate product obtained in step 3 into tetrahydrofuran, and stirring in an ice bath to obtain solution C;

[0030] 5. Mix anhydrous ethanol and deionized water, and stir at room temperature to obtain an ethanol solution;

[0031] 6. Add zirconium n-propoxide into the ethanol solution, stir to prepare solution D;

[0032] Seven, adding solution D to solution C, stirring at room temperature to obtain solution E;

[...

specific Embodiment approach 2

[0035] Embodiment 2: The difference between this embodiment and Embodiment 1 is that: in step 1, the volume ratio of methylvinyldichlorosilane to toluene is 1:(0.9-1.3). Others are the same as the first embodiment.

specific Embodiment approach 3

[0036] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is: in step 2, the volume ratio of borane dimethyl sulfide to methylvinyldichlorosilane in solution A is 1:(3.8~4.3) . Others are the same as in the first or second embodiment.

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Abstract

A preparation method for synthesizing SiZrBOC ceramics by a sol-gel method, the invention relates to the technical field of inorganic non-metallic materials, in particular to a preparation method for synthesizing SiZrBOC ceramics by a sol-gel method. The present invention aims to solve the technical problem of poor thermal stability during the cross-linking process of the SiZrBOC precursor. Methods: First, the SiZrBOC polymer precursor was synthesized by sol-gel method; then the ceramic material was obtained by high temperature pyrolysis. The invention is a preparation method of high-yield SiZrBOC ceramics. Through the micro-control of the changes of process parameters in the synthesis process, the maximum combination of each element in the precursor is ensured, and the large-volume SiZrBOC ceramic precursor is conveniently obtained for later preparation. Complex phase ceramics. The present invention is used for preparing SiZrBOC ceramic material.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic materials, in particular to a preparation method for synthesizing SiZrBOC ceramics by a sol-gel method. Background technique [0002] Polymer-derived ceramics (PDCs) are a class of ceramic materials that do not require sintering aids and have excellent high-temperature oxidation resistance and heat resistance. In the research of precursor transformation ceramics, the main research object is silicon-based precursor ceramics. The currently known precursor ceramics can be roughly divided into binary system ceramics, ternary system ceramics, quaternary system ceramics and pentad system ceramics. Among them, SiZrBOC five-element ceramics and silicon-based precursor ceramics begin to undergo a carbothermic reduction reaction at around 1300 °C. Therefore, how to improve the high-temperature stability of silicon-based precursor ceramics is the focus of current research. SUMMARY OF THE IN...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/515C04B35/622C04B35/624
CPCC04B35/515C04B35/622C04B35/624C04B2235/486C04B2235/48C04B2235/656C04B2235/6562C04B2235/6565C04B2235/6567
Inventor 赵广东张婉莹韩文波吕杨张志新曲灵犀
Owner HEILONGJIANG UNIV