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Preparation method of machinable ceramic surface hydrophobic membrane

A technology of ceramic surface and hydrophobic film, applied in the direction of coating, etc., can solve the problem of poor bonding effect between the film layer and epoxy resin, and achieve good bonding performance

Active Publication Date: 2021-06-18
BEIJING INST OF AEROSPACE CONTROL DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the better the hydrophobic effect of the hydrophobic film prepared by these methods, the worse the bonding effect between the film layer and the epoxy resin, which is very unfavorable especially for the process that needs to be bonded and assembled later.

Method used

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  • Preparation method of machinable ceramic surface hydrophobic membrane
  • Preparation method of machinable ceramic surface hydrophobic membrane
  • Preparation method of machinable ceramic surface hydrophobic membrane

Examples

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preparation example Construction

[0025] Such as figure 1 As shown, the invention provides a method for preparing a machinable ceramic surface hydrophobic film, comprising the following steps:

[0026] Step (1), cleaning the machinable ceramic surface.

[0027] The surface cleaning of the machinable ceramics includes: placing the machinable ceramics in a plasma cleaning machine, setting the power to 70-100%, and cleaning time for 2-5 minutes to obtain the machinable ceramics after surface cleaning.

[0028] Step (2), treating the surface of the machinable ceramic with a coupling agent to obtain a machinable ceramic modified by the coupling agent.

[0029] Machinable ceramic surface coupling agent treatments, including:

[0030] Add the coupling agent to an aqueous solution of ethanol for hydrolysis, use acetic acid to adjust the pH value to 3-4, and reflux for 1 hour under stirring conditions; the ratio of coupling agent, water, and ethanol in the ethanol solution of the coupling agent is 1: 1:18 (mass rati...

Embodiment 1

[0040] 1. The embodiment of the present invention provides a machinable ceramic with a hydrophobic film attached to the surface. The specific preparation method is as follows:

[0041] Place the machinable ceramic material in the plasma cleaning machine cabin, set the power of the plasma cleaning machine to 70%, and the cleaning time to 3 minutes, and perform plasma cleaning on the machinable ceramic material.

[0042] Use an analytical balance to weigh 10.0g deionized water, 10.0g organosilane KH-560, and 180.0g absolute ethanol in a flask. After stirring evenly, add an appropriate amount of acetic acid to adjust the pH to 3-4. Under stirring conditions, 80 ℃ reflux reaction for 1h.

[0043] Put the machinable ceramics after plasma cleaning into the organic silane solution to ensure that the surface of the machinable ceramics is completely soaked, keep it for 10 minutes, take it out and put it in a blast drying oven at 100°C for 1 hour, and get the surface coupling agent afte...

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Abstract

The invention relates to a preparation method of a machinable ceramic surface hydrophobic membrane. The preparation method comprises the following steps: (1) cleaning a machinable ceramic surface; (2) performing coupling agent treatment on the surface of the machinable ceramic to obtain coupling agent modified machinable ceramic; and (3) uniformly spraying an amine solution on the coupling agent modified machinable ceramic surface for reaction, then placing in an air dry oven, drying at 120 DEG C for 1 hour, and cooling to room temperature to obtain the machinable ceramic surface hydrophobic membrane. The amine solution is an ethanol solution of an alcohol amine reagent, and the mass concentration of the alcohol amine reagent is 0.5-2%. According to the machinable ceramic hydrophobic membrane layer prepared by the method, the infiltration of water vapor to machinable ceramic in a high-humidity environment is isolated, and the relatively good adhesive property with epoxy glue is also ensured.

Description

technical field [0001] The invention belongs to the field of surface engineering and application, and relates to a method for preparing a hydrophobic film on a machinable ceramic surface. Background technique [0002] Machinable ceramics is a composite polycrystalline material composed of fluorine phlogopite microcrystals and glass. It has the characteristics of excellent insulation performance, high and low temperature resistance, thermal shock resistance, and no outgassing. Drilling, cutting, tapping and other mechanical processing can achieve high processing accuracy, and it is often used as the skeleton material of precision components. However, the material has poor moisture resistance, and electrical materials prepared from this material are prone to insulation quality degradation in an environment with a relative humidity greater than 75%, which may cause faults such as power transmission errors and abnormal feedback signals in severe cases. [0003] Building a hydro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/34
CPCC03C17/3405C03C2217/78C03C2218/111C03C2218/112
Inventor 李彦博崔庆龙康军李宁
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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