High-temperature resistant low dielectric phosphorus-containing inorganic resin capable of compositing with fiber, preparation and application

A composite technology of inorganic resin and fiber, applied in the direction of radiation unit cover, etc., can solve the problems of short stable period of aluminum phosphate, high curing temperature, easy crystallization, etc.

Inactive Publication Date: 2012-07-04
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the higher curing temperature needs to be 500°C, and the stable period of aluminum phosphate is shorter and it is easy to crystallize.

Method used

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  • High-temperature resistant low dielectric phosphorus-containing inorganic resin capable of compositing with fiber, preparation and application
  • High-temperature resistant low dielectric phosphorus-containing inorganic resin capable of compositing with fiber, preparation and application
  • High-temperature resistant low dielectric phosphorus-containing inorganic resin capable of compositing with fiber, preparation and application

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preparation example Construction

[0025] (1) Preparation of silica pellets

[0026] Mix ammonia water, water and ethanol in the reactor, and stir in a constant temperature heating magnetic stirrer at room temperature 25°C for 10 minutes, then slowly drop in tetraethyl orthosilicate, wherein the molar concentration of tetraethyl orthosilicate is 0.01-0.06mol / L, The molar concentration of ammonia water is 0.1-0.4mol / L, the concentration of deionized water is 0.5-1.0mol / L, and then airtightly stirred until the reaction is completed. The reaction time is 240-480min, the stirring speed is 200-1000r / min, and the standing aging is 3-6h , centrifuged, and finally the SiO 2 The precipitate is washed to neutrality and dried at room temperature -100°C to obtain monodisperse SiO with different particle sizes of 100-600nm 2 small ball;

[0027] (2) Surface treatment of quartz fibers

[0028] ① Ablation

[0029] Place the quartz fiber in a muffle furnace for heat treatment, burn candles at 300-500°C, keep the temperatur...

Embodiment 1

[0037] (1) Take by weighing the phosphoric acid 100g that mass concentration is 85%, deionized water 42g, add in the reactor together constantly stir, then weigh the Al(OH) of 16.93g 3 Add to the above solution, keep the temperature at about 80°C for 30min, until the solution is clear and transparent; weigh 7.24g of CrO 3 Add and stir, until the dissolution is complete, the solution turns dark red, the temperature drops below 60°C, slowly add 30% H 2 o 2 , the addition amount is 22g, the whole process temperature is controlled at about 60°C, the reduction reaction is carried out for 40min, then the temperature is raised to boiling for 5min and then the heating is stopped, the temperature rises to 101°C, and a viscous solution of grass green can be obtained, and its mass concentration is 52.6%; Cool the solution temperature to 50°C, then weigh 13.86g of AlN with a particle size of 5μm and add it, stir for 10min, then weigh 119g of alumina powder with a particle size of 5μm and...

Embodiment 2

[0040] (1) Take by weighing the phosphoric acid 100g that mass concentration is 85%, deionized water 45g, add in the reactor together constantly stir, then weigh the Al(OH) of 22.55g 3 Add it into the above solution, slowly raise the temperature to about 80°C, and react for 20 minutes until the solution is clear; then weigh 9.6g of CrO 3 Add the solution, stir for 20min, CrO 3 After the dissolution is complete, the solution turns dark red, and the temperature drops to 80°C. Slowly add 4.81g of methanol to the mixture in batches, during which the temperature is controlled at 80-90°C, the reduction reaction is carried out for 8 minutes, and then the temperature is raised to boiling and then the heating is stopped. At 102°C, grass green viscous solution can be obtained with a mass concentration of 52.2%; the temperature is cooled to 60°C, then 7g of AlN with a particle size of 3μm is weighed and added, stirred for 5min, and then 70g of AlN with a particle size of 3μm is weighed. ...

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Abstract

The invention discloses a high-temperature resistant low dielectric phosphorus-containing inorganic resin capable of compositing with fiber, and a preparation method and application of the inorganic resin, which belongs to the technical field of inorganic resin. The high-temperature resistant low dielectric phosphorus-containing inorganic resin capable of compositing with fiber comprises a chrome-alumina phosphate solution, melted quartz powder, alumina powder and aluminium nitride. The preparation method comprises the following steps: adding chromium trioxide and selecting different reductants to reduce Cr6+ to Cr3+ based on preparation of an aluminium phosphate solution to prepare the chrome-alumina phosphate solution; and adding oxide and nitride with high- temperature resistance and low dielectric constant to obtain the high-temperature resistant low dielectric phosphorus-containing inorganic resin. The high-temperature resistant low dielectric phosphorus-containing inorganic resin capable of compositing with fiber has a simple preparation technology and a universal device, is easy to achieve industrial production, can be completely cured at 150 DEG C, and has better high-temperature mechanical property, excellent dielectric property and moisture absorption resistant property. A wave-transmitting material used for making an antenna housing can be obtained by soaking quartzfibers or quartz fiber fabrics with surfaces being specially treated in the inorganic resin, airing in room temperature and hot-pressing.

Description

technical field [0001] The invention relates to a high-temperature-resistant low-dielectric phosphorus-containing inorganic resin capable of being combined with fibers, its preparation and application, and belongs to the technical field of inorganic resins. Background technique [0002] High-temperature wave-transparent material is a material with both high-temperature resistance and wave-transparency properties. It is a multifunctional dielectric material that protects missiles from working normally in harsh environments such as communication, telemetry, guidance, and detonation. It is used in missile radio systems. be widely used. The dielectric constant of excellent aerospace wave-transparent materials is generally required to be less than 4, and the dielectric loss is 10 -1 ~10 -3 . According to its structure, wave-transparent materials can be divided into two categories: antenna window and radome. The wave-transparent materials used to make radomes mainly include or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B12/02H01Q1/42
Inventor 史翎张莹莹张军营程珏
Owner BEIJING UNIV OF CHEM TECH
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