Boron nitride-based ceramic composite material and preparation method thereof

A ceramic composite material and boron nitride-based technology, applied in the field of boron nitride-based ceramic materials and their preparation, can solve the problems of high cost, difficulty in large-sized products, long production cycle, etc., and achieve short production cycle and easy processing. , The effect of simple equipment structure

Active Publication Date: 2010-06-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of high cost, long production cycle and difficulty in making large-sized products in the preparation of existing boron nitride-based ceramic materials, the present invention provides a boron nitride-based ceramic composite material and a preparation method thereof

Method used

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0024] Embodiment 1: The boron nitride-based ceramic composite material in this embodiment is made of 20%-80% boron carbide powder, 5%-70% silicon powder and 0%-70% diluent powder according to weight percentage.

[0025] Both the boron carbide powder and the silicon powder in this embodiment are purchased from the market.

[0026] The boron nitride-based ceramic composite material in this embodiment can withstand high temperatures above 2500°C; the boron nitride-based ceramic composite material in this embodiment has extremely good thermal shock resistance, and can be cycled hundreds of times at room temperature -1000°C. The product is not damaged; the boron nitride-based ceramic composite material in this embodiment has excellent machinability, and can be processed by using different machine tools; the bending strength of the boron nitride-based ceramic composite material in this embodiment can reach 60-150MPa, Under the condition of high temperature of 2000 ℃, the bending st...

specific Embodiment approach 2

[0027] Embodiment 2: The boron nitride-based ceramic composite material in this embodiment is made of 30%-70% boron carbide powder, 20%-60% silicon powder and 0%-60% diluent powder according to weight percentage. Others are the same as in the first embodiment.

[0028] The bending strength of the boron nitride-based ceramic composite material in this embodiment can reach 60-150 MPa, and the bending strength can reach 40-90 MPa under the high temperature condition of 2000°C.

specific Embodiment approach 3

[0029] Embodiment 3: The boron nitride-based ceramic composite material in this embodiment is made of 30%-60% boron carbide powder, 20%-50% silicon powder and 20%-50% diluent powder according to weight percentage. Others are the same as in the first embodiment.

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Abstract

The invention relates to a boron nitride-based ceramic composite material and a preparation method thereof. The invention solves the problems that the preparation of the traditional boron nitride-based ceramic composite material has high cost, long production period and difficulty in manufacturing products with large size. The boron nitride-based ceramic composite material is prepared from carbonized boron powder, silicon powder and diluent powder. The boron nitride-based ceramic composite material is prepared by the steps of raw material drying, ball milling and mixing, blank production and self-propagating synthesis of the blank. The method has short production period and low cost and can realize the production of products with large size.

Description

technical field [0001] The invention relates to a boron nitride-based ceramic material and a preparation method thereof. Background technique [0002] Boron nitride (BN) products have high temperature resistance, corrosion resistance, electrical insulation properties, and excellent thermal shock resistance and processability, so they are widely used in industry. Using the non-wetting and corrosion resistance of BN to glass and metal melts, it can be used as crucibles, vessels, channels, delivery pumps and other components for melting various non-ferrous metals, precious metals and rare metals in special smelting; as melting boron single crystal Utensils; in the manufacture of film capacitors and cigarette wrapping paper, using BN as a molten aluminum evaporation container can receive high-quality and high-yield effects; BN products can also be used as molds for cast steel and poured glass. It can be used as high-temperature insulating parts for plasma welding tools, bushing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/563C04B35/515C04B35/622
Inventor 郑永挺赫晓东
Owner HARBIN INST OF TECH
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