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SrZrO3 preparation method and SrZrO3 ceramic

A powder and billet technology, which is applied in the field of ceramic preparation, can solve the problems of infrared emissivity, thermal conductivity, expansion coefficient, high temperature resistance and insufficient performance to meet the needs of use, and achieve good chemical stability, low emissivity, and high thermal expansion. The effect of the coefficient

Active Publication Date: 2020-02-21
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current skin materials of military weapons are not enough to meet the needs of use in terms of infrared emissivity, thermal conductivity, expansion coefficient, and high temperature resistance.

Method used

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  • SrZrO3 preparation method and SrZrO3 ceramic
  • SrZrO3 preparation method and SrZrO3 ceramic
  • SrZrO3 preparation method and SrZrO3 ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Using SrCO 3 and ZrO 2 Press n(SrCO 3 ): n(ZrO 2 )=1.02:0.98 molar ratio is fully mixed as a raw material. Mixed SrCO 3 and ZrO 2 The powder is pressed into a billet under a pressure of 8Mpa through a tablet press.

[0040] The green body is placed in a microwave sintering furnace. In order to make the green body heated evenly, ZrO 2 or Al 2 o 3 As a powder buried and fired, the sintering temperature is 1400°C, the heating rate is 10°C / min, and the holding time is 30min to obtain the final SrZrO 3 ceramic block.

Embodiment 2

[0042] Using SrCO 3 and ZrO 2 Press n(SrCO 3 ): n(ZrO 2 )=1.04:0.96 molar ratio fully mixed as raw material; mixed SrCO 3 and ZrO 2 The powder is pressed into a billet by a tablet press under a pressure of 10Mpa.

[0043] The green body is placed in a microwave sintering furnace. In order to make the green body heated evenly, ZrO 2 or Al 2 o 3 The powder is buried and fired, the sintering temperature is 1500°C, the heating rate is 15°C / min, and the holding time is 1h to obtain the final SrZrO 3 ceramic block.

Embodiment 3

[0045] Using SrCO 3 and ZrO 2 Press n(SrCO 3 ): n(ZrO 2 )=1.02:0.98 molar ratio is fully mixed as a raw material; the mixed SrCO 3 and ZrO 2 The powder is placed in an isostatic pressing press with a pressure of 25Mpa to form a billet.

[0046] The green body is placed in a microwave sintering furnace, ZrO 2 or Al 2 o 3 Powder assisted burying and sintering, the sintering temperature was 1500°C, the heating rate was 15°C / min, and the holding time was 30min to obtain the final SrZrO 3 ceramic block.

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Abstract

The invention provides an SrZrO3 preparation method. The preparation method comprises the steps that SrCO3 and ZrO2 are mixed and pressed into a blank, then the blank is placed in a microwave environment to be treated, and the treatment comprises powder treatment or block treatment, wherein the powder treatment comprises the steps: heating the blank to 1100-1400 DEG C, carrying out heat preservation for not less than 30 min, and thus obtaining SrZrO3 powder; and the block treatment comprises the steps: adding powder, burying and sintering, heating to 1200-1650 DEG C at the rate of 5-25 DEG C / min, sintering, and carrying out heat preservation for not less than 30 min to obtain an SrZrO3 block. The prepared SrZrO3 block has the excellent characteristics of good chemical stability, mechanicalstrength, high-temperature sintering resistance and the like, and can be used as an infrared stealth skin material for military weapons such as aircraft, tanks and the like with low emissivity, low thermal conductivity, high expansion coefficient and high temperature resistance. Meanwhile, the invention also provides the SrZrO3 ceramic prepared by the method.

Description

technical field [0001] The invention relates to the technical field of ceramic preparation, in particular to a method for preparing SrZrO 3 method and SrZrO 3 ceramics. Background technique [0002] With the development of modern military detection technology and guidance technology, the importance of stealth technology in modern information warfare is increasing day by day. As an important auxiliary means of radar detection technology, infrared detection technology occupies an irreplaceable position in modern warfare. Infrared imaging has strong advantages in distance, precision, concealment and anti-interference, and has been widely used in military affairs. By weakening the infrared radiation characteristic signal of the target by coating on the target surface, etc., the probability of the target being discovered and identified is effectively reduced, and the battlefield survivability of the target is improved. However, the current skin materials of military weapons a...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622C04B35/64
CPCC04B35/48C04B35/622C04B35/64C04B2235/3213C04B2235/667C04B2235/6562
Inventor 王俊马小波于浩洋孟祥博马文新巴雅尔
Owner INNER MONGOLIA UNIV OF TECH
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