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Dielectric property acceleration stabilization method for silicon dioxide based composite material

A technology of dielectric properties and composite materials, which is applied in the field of accelerating and stabilizing the dielectric properties of silica-based composite materials, can solve problems such as the increase of dielectric constant, and achieve the effect of improving work efficiency and shortening the production cycle

Active Publication Date: 2009-08-12
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the above formula that absorbing a small amount of water will greatly increase the dielectric constant of the material

Method used

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  • Dielectric property acceleration stabilization method for silicon dioxide based composite material
  • Dielectric property acceleration stabilization method for silicon dioxide based composite material
  • Dielectric property acceleration stabilization method for silicon dioxide based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: First test the initial weight and dielectric properties of the composited material, and determine that the initial state of the material is dielectric constant: 3.35, dielectric loss: 0.05; then put the material in a temperature of 30°C and a humidity of 70 % accelerated aging environment, accelerate moisture absorption for 10 days, and then carry out weight test and dielectric property test to get moisture absorption rate: 1.90%, dielectric constant: 3.70, dielectric loss: 0.28, satisfying dielectric constant: 3.55~3.95 , Dielectric loss ≤ 0.35 stipulated in the use requirements.

Embodiment 2

[0022] Example 2: First test the initial weight and dielectric properties of the composited material, and determine that the initial state of the material is dielectric constant: 3.35, dielectric loss: 0.05; then put the material in a temperature of 70 ° C and a humidity of 90 % accelerated aging environment, accelerate moisture absorption for 4 days, then carry out weight test and dielectric performance test to get moisture absorption rate: 1.95%, dielectric constant: 3.75, dielectric loss: 0.30, satisfying dielectric constant: 3.55~3.95 , Dielectric loss ≤ 0.35 stipulated in the use requirements.

Embodiment 3

[0023] Example 3: First test the initial weight and dielectric properties of the composited material, and determine that the initial state of the material is dielectric constant: 3.35, dielectric loss: 0.05; then put the material in a temperature of 50 ° C and a humidity of 80 % accelerated aging environment, accelerated moisture absorption for 7 days, and then carried out weight test and dielectric performance test to get moisture absorption rate: 1.93%, dielectric constant: 3.73, dielectric loss: 0.29, satisfying dielectric constant: 3.55~3.95 , Dielectric loss ≤ 0.35 stipulated in the use requirements.

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Abstract

The invention belongs to a method for accelerating and stabilizing dielectric performance, in particular relating to a method for accelerating and stabilizing the dielectric performance of a silicon dioxide based composite material. The method comprises the following steps: (1) firstly, testing the initial weight and the dielectric performance of a material which completes recombination, and determining the initial state of the material; and (2) secondly, placing the material in an accelerated aging environment with temperature ranging from 30 to 70 DEG C and humidity ranging from 70 to 90 percent to be subjected to accelerated moisture absorption for 4 to 10 days; or, placing the material in an environment with temperature ranging from 20 to 80 DEG C and humidity ranging from 70 to 95 percent to be subjected to accelerated moisture absorption for 4 to 15 days, so that the material reaches a saturated state, and the material naturally recovers in atmosphere with indoor humidity less than or equal to 45 percent for 10 to 30 days. The method ensures the moisture absorption balance point of accelerated aging is in accordance with natural aging, can meet the requirement of the material product on limitation period, shortens the production period of the material and related products, and improves the working efficiency.

Description

technical field [0001] The invention belongs to a method for accelerating and stabilizing dielectric properties, in particular to a method for accelerating and stabilizing dielectric properties of silicon dioxide-based composite materials. Background technique [0002] Aerospace wave-transparent materials are dielectric materials that can protect aerospace vehicles from normal communication, telemetry, guidance, and detonation under harsh environmental conditions. At present, aerospace wave-transparent materials have developed from simple wave-transparent materials to fiber-reinforced silica-based wave-transparent composite materials with multiple functions such as heat insulation, load bearing, wave transmission, and impact resistance. Silica-based wave-transparent composite materials can be divided into three types of quartz, 2.5D quartz, high silicon oxygen puncture and other types according to the reinforced structure and material. [0003] The silica matrix of the sili...

Claims

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Application Information

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IPC IPC(8): C04B40/00C04B41/60C04B41/80H01B3/10H01B3/12G01N27/00
Inventor 赖文恩陈桂才张大海
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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