Method for preparing amorphous silicon-boron-carbon-nitrogen-zirconium-aluminum ceramic material

A silicon-boron-carbon-nitride-zirconium-aluminum, ceramic material technology, applied in the field of ceramic materials, can solve the problems of uneven chemical composition of ceramic materials, material designability and low machinability, and achieve low cost, simple method and mild conditions Effect

Active Publication Date: 2018-02-27
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the process of mechanical alloying is simple and the cost is low, the chemical composition of the obtained ceramic material is not uniform

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Under a nitrogen atmosphere, dissolve 96.6g of hexamethyldisilazane in 0.3L of n-hexane to form a hexamethyldisilazane solution, add it to a three-necked flask with a constant pressure separatory funnel, and place In an absolute ethanol reaction bath at -15°C, dissolve 11.7g of boron trichloride and 13.5g of trichlorosilane in 0.1L of n-hexane to form a mixed solution, add the mixed solution into a constant pressure separatory funnel, and stir The hexamethyldisilazane solution was slowly added dropwise to the mixed solution of boron trichloride and trichlorosilane at the same time, after the dropwise addition, the temperature of the reaction solution was raised to room temperature, stirred for 12 hours, and the three-neck flask was placed in an oil bath, The three-necked flask was heated, stirred at 130° C. for 3 h, cooled to room temperature, and a pale yellow liquid was obtained.

[0024] (2) Under a nitrogen atmosphere, 14.6g of zirconocene dichloride and toluene...

Embodiment 2

[0027] (1) Under a nitrogen atmosphere, dissolve 193.2g of hexamethyldisilazane in 0.6L of n-hexane to form a hexamethyldisilazane solution, add it to a three-necked flask with a constant pressure separatory funnel, and place In an absolute ethanol reaction bath at -15°C, dissolve 23.4g of boron trichloride and 27g of trichlorosilane in 0.2L of n-hexane to form a mixed solution, add the mixed solution into a constant pressure separatory funnel, and stir The hexamethyldisilazane solution was slowly added dropwise to the mixed solution of boron trichloride and trichlorosilane at the same time. After the dropwise addition, the temperature of the reaction solution was raised to room temperature, stirred for 16 hours, and the three-neck flask was placed in an oil bath. The three-necked flask was heated, stirred at 130° C. for 3 h, cooled to room temperature, and a pale yellow liquid was obtained.

[0028] (2) Under a nitrogen atmosphere, 29.2g of zirconocene dichloride and toluene ...

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Abstract

The invention relates to a method for preparing an amorphous silicon-boron-carbon-nitrogen-zirconium-aluminum ceramic material. The preparation method comprises the following steps: taking hexamethyl-disilazane, boron trichloride and trichlorosilane as raw materials, carrying out a condensation polymerization reaction to obtain light yellow liquid, adding trimethylamine-aluminum hydride and biszirconium dichloride to obtain a yellow precursor, and finally performing hot-pressing sintering, thereby obtaining the amorphous silicon-boron-carbon-nitrogen-zirconium-aluminum ceramic material. The method disclosed by the invention is simple, mild in conditions and low in cost; the prepared amorphous silicon-boron-carbon-nitrogen-zirconium-aluminum ceramic material is uniform in texture structureand high in chemical purity and has excellent high-temperature resistance and oxidation resistance, and the comprehensive performance of the ceramic material can be further regulated by regulating thecontent of Zr and Al in the amorphous silicon-boron-carbon-nitrogen-zirconium-aluminum ceramic material.

Description

technical field [0001] The invention belongs to the field of ceramic materials, in particular to a method for preparing an amorphous silicon boron carbon nitrogen zirconium aluminum ceramic material. Background technique [0002] Silicon boron carbon nitride (SiBCN) ceramics have good high temperature resistance, corrosion resistance, oxidation resistance and mechanical properties, and have broad application prospects in the aerospace field. However, in an oxidizing atmosphere with a temperature exceeding 1500 °C, the amorphous oxide layer in the SiBCN ceramic material will crystallize and form B during oxidation. 2 o 3 It may volatilize and lose a large amount of B elements, further reducing the high temperature resistance and oxidation resistance of the material. In order to improve the oxidation resistance of SiBCN ceramic materials, metal elements such as Zr and Al are generally introduced into the SiBCN multiphase ceramic system to form high temperature resistant phas...

Claims

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Application Information

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IPC IPC(8): C04B35/515C04B35/622
CPCC04B35/515C04B35/622C04B2235/6562
Inventor 刘勇彭帅崔永杰常雪峰张晨宇韩克清张辉余木火
Owner DONGHUA UNIV
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