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Making method of amorphous aluminum phosphate-based high temperature-resistant wave transmitting ceramic coat on metal surface

An aluminum phosphate-based, metal surface technology is applied in the field of preparation of high temperature resistant wave-transmitting ceramic coatings on metal surfaces. The effect of good performance and short production cycle

Active Publication Date: 2014-11-05
HARBIN INST OF TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing an amorphous aluminum phosphate-based high-temperature-resistant wave-transmitting ceramic coating on a metal surface in order to solve the problems of low high-temperature resistance and low wave-transmittance at high temperatures in the existing organic coating system

Method used

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specific Embodiment approach 1

[0016] Specific implementation mode 1: A method for preparing an amorphous aluminum phosphate-based high-temperature-resistant wave-transmitting ceramic coating on a metal surface in this implementation mode is achieved through the following steps:

[0017] 1. Weigh raw materials: Weigh 30 to 50 parts of aluminum nitrate, 2 to 10 parts of phosphorus pentoxide, 30 to 90 parts of absolute ethanol and 60 to 80 parts of wave-permeable ceramic fillers in parts by weight for later use;

[0018] 2. Preparation of amorphous AlPO 4 Binder solution: ① Divide the absolute ethanol weighed in step 1 into two parts at a volume ratio of 1:2, that is, divide the absolute ethanol weighed in step 1 into 10-30 parts of absolute ethanol and 20-60 parts Two parts of dehydrated ethanol, then dissolve the aluminum nitrate weighed in step 1 in 10 to 30 parts of dehydrated ethanol, stir until completely dissolved, and obtain solution A; ②The phosphorus pentoxide weighed in step 1 Dissolve in 20-60 pa...

specific Embodiment approach 2

[0026] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step one, take by weight 40 parts of aluminum nitrate, 5 parts of phosphorus pentoxide, 70 parts of dehydrated alcohol and wave-permeable ceramic filler aluminum borate Whisker 70 backup. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0027] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the wave-transparent ceramic filler described in step one is aluminum borate whisker, magnesium borate whisker, silicon nitride particles and boron nitride particles one or a mixture of several. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a making method of a high temperature-resistant wave transmitting ceramic coat on a metal surface, and concretely relates to a making method of an amorphous aluminum phosphate-based high temperature-resistant wave transmitting ceramic coat on the metal surface. The purpose of the invention is solving the problems of low high temperature resistance temperature and low wave transmittance of present organic coat systems. The method comprises the following steps: 1, weighing a raw material; 2, preparing an amorphous AlPO4 adhesive solution; 3, preparing a wave transmitting ceramic coating; and 4, preparing the amorphous aluminum phosphate-based high temperature-resistant wave transmitting ceramic coat on the metal surface. The coat obtained in the invention has good dielectric properties, and the dielectric constant is small, so the dielectric loss angle is small, thereby the electromagnetic wave transmittance is improved, and the wave transmittance is greater than 80% in 1-18GHz; and the high temperature resistance is good, the high temperature resistance temperature is 500-1300DEG C, and the amorphous aluminum phosphate-based high temperature-resistant wave transmitting ceramic coat has the advantages of environmentally-friendly and nontoxic raw material, good film forming property, low cost, simple preparation method and short period.

Description

technical field [0001] The invention relates to a method for preparing a high-temperature-resistant wave-transmitting ceramic coating on a metal surface. Background technique [0002] With the development of aerospace technology, the requirements for materials are becoming more and more stringent. At present, the main materials of various spacecraft are still metal materials, but due to the low melting point of metal materials and poor high temperature resistance, the metal surface is coated with a heat-resistant coating that is resistant to high temperature and oxidation, which can effectively increase the service temperature of metal materials . In addition, electronic devices such as missiles, aircraft radomes, antenna windows and radar radomes, wave windows of medical instruments, and microwave communications all need good high-temperature wave-transmitting properties. Traditionally used organic coatings are carbonized and decomposed at high temperatures, resulting in ...

Claims

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Application Information

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IPC IPC(8): C04B35/447C04B35/622
Inventor 王亚明邹永纯贾德昌欧阳家虎周玉
Owner HARBIN INST OF TECH
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