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Preparation method of zirconium diboride (ZrB2) ceramic precursor

A ceramic precursor, zirconium diboride technology, applied in the field of material chemistry, can solve the problems that cannot meet the requirements of C/C composite materials, cannot form a homogeneous impregnation solution, etc., achieve high ceramic conversion rate and broad application prospects Effect

Inactive Publication Date: 2018-03-20
SHAANXI SHENGMAI PETROLEUM
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Problems solved by technology

Due to the ZrB prepared by the above method 2 None of the ceramic precursors can form a homogeneous impregnation solution, which cannot meet the requirements of the PIP process for the preparation of ZrB 2 The requirements of ceramic modified C / C composites, so a new method was developed to prepare ZrB 2 Ceramic precursors are particularly necessary and important

Method used

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Embodiment Construction

[0020] A kind of preparation method of zirconium diboride ceramic precursor, adopts following steps:

[0021] Step 1: Ingredients:

[0022] Zirconium oxychloride octahydrate, o-hydroxybenzyl alcohol, acetylacetone and boric acid;

[0023] Step 2: Synthesis of zirconium-containing polymer PZS:

[0024] Acetylacetone (2g, 0.02mol), o-hydroxybenzyl alcohol, triethylamine (2.02g, 0.02mol) and methanol (25mL) were mixed evenly, and then added dropwise to a solution containing zirconium oxychloride (3.22 g , 0.01mol) methanol solution (50mL) in a three-necked flask;

[0025] After the dropwise addition, the reaction was stirred and reacted at room temperature for 6 hours; the reaction solution was sequentially subjected to steps such as rotary evaporation, THF dissolution, filtration, filtrate concentration, n-hexane precipitation, and vacuum drying at room temperature to obtain a light yellow zirconium-containing polymer powder;

[0026] Step 3: ZrB 2 Preparation of ceramic pre...

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Abstract

The invention relates to the technical field of material chemistry, in particular to a method for preparing a zirconium boride ceramic precursor. A preparation method of zirconium diboride ceramic precursor adopts the following steps: step 1: raw material; step 2: synthesis of zirconium-containing polymer PZS; step 3: preparation of ZrB2 ceramic precursor. In the present invention, zirconium oxychloride, acetylacetone and o-hydroxybenzyl alcohol undergo polycondensation reaction under alkaline conditions to generate a zirconium-containing polymer, and the polymer is blended with boric acid in a solution to obtain a ZrB2 ceramic precursor. The ceramic precursor prepared by this method can form a homogeneous impregnation solution, has a high ceramic conversion rate, meets the requirements of the PIP process, and has broad application prospects in the construction of ZrB2 ceramic modified C / C composites.

Description

technical field [0001] The invention relates to the technical field of material chemistry, in particular to a method for preparing a zirconium boride ceramic precursor. Background technique [0002] In recent years, carbon / carbon composites modified by refractory metal carbon / boride ceramics have attracted extensive attention because of their excellent properties such as low density, high specific strength, high specific modulus, anti-ablation, and thermal shock resistance. Its outstanding high-temperature oxidation resistance makes this type of composite material show attractive application prospects in hypersonic vehicles. At present, this carbon-ceramic composite material is mainly constructed by the precursor impregnation and cracking) process, that is, the porous low-density carbon fiber preform is first immersed in the refractory metal carbon / boride ceramic precursor solution, through molecular diffusion and osmosis. The macromolecules of the precursor enter the matri...

Claims

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Application Information

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IPC IPC(8): C04B35/58C04B35/622
CPCC04B35/58078C04B35/622C04B2235/6562C04B2235/658
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM
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