Preparation method of inorganic composite coating on the surface of quartz fiber reinforced quartz matrix composite material

A technology of quartz fiber and composite materials, applied in functional ceramics and special fields, can solve the problems of rough surface damage, deterioration of wave transmission performance, low surface hardness, etc., achieve good physical and chemical matching, improve dielectric properties, and moisture resistance Good results

Active Publication Date: 2011-12-14
ZHONGCAI HIGH NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the product has a high porosity, is not dense, and has a low surface hardness. During use, the ability to withstand rain erosion and airflow is poor, resulting in surface erosion and making the surface rough and damaged.
At the same time, the product will absorb moisture during long-term storage, resulting in deterioration of the wave-transmitting performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Preparation of coating materials

[0027] (1) Preparation of bottom material: Weigh 100g of lithium carbonate, 240g of boric acid, 95g of aluminum hydroxide, 135g of quartz, 1g of titanium oxide, 1g of zirconia, 1.5g of tin oxide, 0.75g of lanthanum oxide, 40g of calcium hydrogen phosphate and fluoride 15g of magnesium, mixed evenly, melted in a frit furnace at 1150°C, quenched in water, dried and pulverized.

[0028] (2) Preparation of surface material: Weigh 90g of lithium carbonate, 75g of aluminum hydroxide, 75g of quartz, 250g of boric acid, 5g of magnesium oxide, 5g of titanium oxide and 25g of zinc oxide, mix them evenly, and place them in a frit furnace at 900°C It is prepared by melting under water, drying and crushing after water quenching.

[0029] 2. Preparation of modified materials

[0030] Weigh 70g of inorganic silicone resin and 30g of curing agent, stir for 6 hours until colorless and transparent.

[0031] 3. Preparation of composite coating

[...

Embodiment 2

[0040] 1. Preparation of coating materials

[0041] (1) Preparation of bottom material: weigh 83g of lithium carbonate, 220g of boric acid, 80g of aluminum hydroxide, 150g of quartz, 1g of titanium oxide, 1g of zirconia, 3.5g of tin oxide, 1g of lanthanum oxide, 18g of calcium hydrogen phosphate and magnesium fluoride 8g, mixed evenly, melted in a frit furnace at 1200°C, dried and pulverized after water quenching.

[0042] (2) Preparation of surface material: weigh 114g of lithium carbonate, 63g of aluminum hydroxide, 60g of quartz, 300g of boric acid, 7g of magnesium oxide, 7g of titanium oxide and 18g of zinc oxide, mix them evenly, and place them in a frit furnace at 1000°C It is prepared by melting under water, drying and crushing after water quenching.

[0043] 2. Preparation of modified materials

[0044] Weigh 30g of inorganic silicone resin and 15g of curing agent, stir for 12 hours until colorless and transparent.

[0045] 3. Preparation of composite coating

[00...

Embodiment 3

[0054] 1. Preparation of coating materials

[0055] (1) Preparation of bottom layer material: Weigh 125g of lithium carbonate, 200g of boric acid, 65g of aluminum hydroxide, 100g of quartz, 1g of titanium oxide, 1.5g of zirconia, 1.4g of tin oxide, 1.5g of lanthanum oxide, 3g of calcium hydrogen phosphate and fluorine Magnesium chloride 1.6g, mixed evenly, melted in a frit furnace at 1050°C, quenched in water, dried and pulverized.

[0056] (2) Preparation of surface material: take lithium carbonate 40g, aluminum hydroxide 40g, quartz 18g, boric acid 100g, magnesium oxide 0.6g, titanium oxide 0.4g and zinc oxide 1g, mix evenly, place in frit furnace Melted at 900°C, quenched in water, dried and crushed.

[0057] 2. Preparation of modified materials

[0058] Weigh 30 g of inorganic silicone resin and 30 g of curing agent, stir for 8 hours until colorless and transparent.

[0059] 3. Preparation of composite coating

[0060] (1) Surface treatment: the surface of the quartz f...

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Abstract

The invention which belongs to the technical field of special functional ceramic materials relates to a preparation method of an inorganic composite coating on the surface of a silica fiber-reinforced silica-based composite material. The preparation method comprises procedures of surface treatment, coating slurry preparation, spray, thermal treatment, and coating with a material for modification,wherein the temperature of the thermal treatment is 500-650DEG C. According to the invention, a solid phase reaction is carried out on three substances of lithium carbonate, aluminum hydroxide, and silica when being calcined, and a low expansion ceramic material is prepared by controlling the ratio among the three substances; a borate or a phosphate and the like are simultaneously introduced to prepare a low temperature flux to reduce the melting temperature of the integral body of the low expansion ceramic material; and a solidification hydrolysis reaction is finally carried out on an inorganic silicone resin to form a compact protection layer on the surface of a transition layer to reach effects of modification and double layer protection. The preparation method of the invention is scientific and reasonable, and is easy to implement, the material of the inorganic composite coating obtained with the preparation method has a good moistureproof performance, and has a good physicochemical match with the silica fiber-reinforced silica-based composite material, and simultaneously can improve dielectric properties of the silica fiber-reinforced silica-based composite material.

Description

technical field [0001] The invention belongs to the technical field of special and functional ceramics, and relates to a method for preparing an inorganic composite coating on the surface of a quartz fiber-reinforced quartz-based composite material. Background technique [0002] The continuous development of aerospace technology has also put forward higher and higher requirements for the performance of wave-transparent materials. Due to their inherent shortcomings (such as low toughness and high brittleness), single-component ceramic materials can no longer meet the conditions of use. Therefore, Research on inorganic fiber fabric composites has become an inevitable trend. At present, the fibers used as reinforcing fabrics mainly include quartz fibers, alumina fibers, and boron nitride fibers. Their composite materials are widely used in many aviation and aerospace engineering components such as nose cones, heat shields, antenna windows, and radomes. use. [0003] Quartz fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/14C04B35/622
Inventor 翟萍陈达谦李伶高芳刘燕燕董波王洪升韦其红
Owner ZHONGCAI HIGH NEW MATERIAL
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