Aluminum magnesium oxynitride/boron nitride diphase refractory materials and preparing process thereof

A technology of aluminum magnesium oxynitride and refractory materials, which is applied in the field of structural ceramics and refractory materials, and can solve problems such as low thermal shock resistance and difficult control of MgAlON synthesis conditions

Inactive Publication Date: 2005-04-06
ZHONGYUAN WEIYE NEW MATERIAL
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the synthesis condition

Method used

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  • Aluminum magnesium oxynitride/boron nitride diphase refractory materials and preparing process thereof
  • Aluminum magnesium oxynitride/boron nitride diphase refractory materials and preparing process thereof
  • Aluminum magnesium oxynitride/boron nitride diphase refractory materials and preparing process thereof

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Experimental program
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Effect test

Embodiment Construction

[0021] according to figure 1 Definite process route, the present invention has carried out the synthetic test of series MgAlON / BN composite material, to analyze pure Al 2 o 3 , AlN, MgO and BN were used as raw materials, and hot-pressed and normal-pressure synthesis tests were carried out. The raw material composition of the synthetic test is shown in Table 1. Natural raw materials were used as raw materials, and the normal-pressure synthesis test was carried out. The raw material components are shown in Table 2. In Table 1-2, Al 2 o 3 , AlN, MgO or bauxite, aluminum powder, and magnesia are the raw materials for the synthesis of MgAlON. According to the calculation of the theoretical density of MgAlON and the theoretical density of BN, it can be known that the volume content of BN in Table 1 and Table 2 varies from about 10% to 90%.

[0022] no

al 2 o 3 (mass%)

AlN(mass%)

MgO(mass%)

BN(mass%)

1

79.74

9.16

4.4...

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Abstract

The invention belongs to structural ceramics and refractory technology field. It relates to a MgAlON/ BN poly-phase refractory material. While compounding MgAlON and BN proportion poly-phase material, if MgAlON is base, the addition quantity of BN is 10% to 40%; if BN is base, the addition quantity is 5% to 25%. The technology request is: sintering temperature is about 1500 degree centigrade to 2000 degree centigrade; sintering pressure is about 0.1Mpa to 50Mpa, nitrogen gas protection while sintering or compounding; the ratio of oxygen partial pressure and nitrogen partial pressure is between 10 negative quintic power to 10 negative fifteen power; temperature keeping span is between 0.5 hour to 10 hour. The compounding of MgAlON/BN can make the most of both features to make the material has good mechanical property, chemical property and high temperature shock stability. The invention may be a new high performance structure ceramics or a new type workable refractory.

Description

Technical field: [0001] The invention belongs to the technical field of structural ceramics and refractory materials, and relates to an aluminum magnesium oxynitride / boron nitride composite refractory material. technical background: [0002] Aluminum magnesium oxynitride (hereinafter referred to as MgAlON) is a stable ceramic material developed in the past ten years. It has good mechanical properties, high temperature resistance, oxidation resistance, and corrosion resistance. Therefore, MgAlON is expected to be used as a high-performance high-temperature ceramic and refractory material. However, the synthesis conditions of MgAlON are not easy to control, and its thermal shock resistance is not high, which limits its wide application to a certain extent. Hexagonal boron nitride (hereinafter referred to as BN) is a ceramic material with superior performance, which has excellent thermal shock resistance, corrosion resistance, high temperature chemical stability and machinabil...

Claims

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Application Information

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IPC IPC(8): C04B35/01C04B35/583C04B35/5835C04B35/622
Inventor 王习东张作泰张梅李文超
Owner ZHONGYUAN WEIYE NEW MATERIAL
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