Preparation method of grain boundary layer type structure ceramic membrane

A technology of ceramic film and grain boundary layer is applied in the field of preparation of grain boundary layer type structure ceramic film, which can solve the problems of complex preparation process of grain boundary layer type structure, high preparation cost, difficult process control, etc., and avoid oxygen diffusion rate. Too fast, evenly distributed, tightly combined effect

Inactive Publication Date: 2013-04-03
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with the preparation of the surface layer structure, the preparation process of the grain boundary layer structure is relatively complicated, especially for such as BaTiO 3 Materials such as high calcination temperature, and the difference between the grain boundary and the oxygen diffusion rate inside the grain are too small and the speed is fast, the process is difficult to control, and the preparation cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of the grain boundary layer structure ceramic membrane comprises the following steps:

[0029] The first step is to dissolve ethyl orthosilicate in c volume parts of absolute ethanol to configure solution C, and then dissolve ammonia water with a mass concentration of 25% that is 5 times the volume of orthosilicate in d volume parts of anhydrous ethanol. Water and ethanol are configured into solution D, c:d=1:1, then, solution C is placed in a magnetic stirring device, and solution D is added in solution C under constant stirring, and the concentration of ethyl orthosilicate in the mixed solution is 0.6mol / L, after 22 hours of reaction, the precipitate was separated, washed by centrifugation and dried at 50°C to obtain SiO 2 Nano or submicron spheres;

[0030] In the second step, first add deionized water to the round bottom flask, and after blowing nitrogen, add styrene, control the concentration of styrene to 5mol / L, continue to blow nitrogen a...

Embodiment 2

[0037] The preparation method of the grain boundary layer structure ceramic membrane comprises the following steps:

[0038]The first step is to dissolve ethyl orthosilicate in c volume parts of absolute ethanol to configure solution C, and then dissolve an equal volume of tetraethyl orthosilicate in ammonia water with a mass concentration of 28% in d volume parts of anhydrous Ethanol is configured into solution D, c:d=1:1, then, solution C is placed in a magnetic stirring device, solution D is added to solution C under constant stirring, and the concentration of ethyl orthosilicate in the mixed solution is 0.5 mol / L, after 22 hours of reaction, the precipitate was separated, washed by centrifugation and dried at 60°C to obtain SiO 2 Nano or submicron spheres;

[0039] In the second step, add deionized water to the round bottom flask first, and then add styrene to control the concentration of styrene to 2mol / L, continue to pass nitrogen and keep the temperature at 80°C, and t...

Embodiment 3

[0046] The preparation method of the grain boundary layer structure ceramic membrane comprises the following steps:

[0047] The first step is to dissolve ethyl orthosilicate in c volume parts of absolute ethanol to configure solution C, and then dissolve ammonia water with a mass concentration of 25% twice the volume of tetraethyl orthosilicate in d volume parts of anhydrous ethanol Water and ethanol are configured into solution D, c:d=1:2, then, solution C is placed in a magnetic stirring device, and solution D is added in solution C under constant stirring, and the concentration of ethyl orthosilicate in the mixed solution is 0.6mol / L, after 22 hours of reaction, the precipitate was separated, washed by centrifugation and dried at 50°C to obtain SiO 2 Nano or submicron spheres;

[0048] In the second step, first add deionized water to the round bottom flask, and after blowing nitrogen, add styrene, control the concentration of styrene to 2mol / L, continue to blow nitrogen a...

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Abstract

The invention relates to a preparation method of a grain boundary layer type structure ceramic membrane. In the prepared grain boundary layer type structure, a core is made of barium titanate, a shell layer is made of copper oxide, polystyrene and SiO2 are adopted to prepare double-sized colloid crystals, non-close packed inverse opal type colloid crystals are obtained after the polystyrene is calcinated to be removed, the barium titanate is filled in the colloid crystals, the non-close packed inverse opal type colloid crystals are soaked in a prepared copper oxide reaction precursor after SiO2 colloid crystal templates are removed, and the grain boundary layer type structure ceramic membrane is obtained after drying, dehydration and calcination.

Description

technical field [0001] The invention relates to a preparation method of a ceramic membrane, in particular to a preparation method of a grain boundary layer structure ceramic membrane. Background technique [0002] With the development of electronic technology towards miniaturization and high density, electronic ceramics have attracted attention due to their unique properties of electricity, magnetism, sound, light, heat and force. According to the structure and principle, semiconductor ceramic capacitors can be divided into two types: surface layer type and grain boundary layer type. The insulating layer is formed at the grain boundary of the ceramic crystal, thereby forming a plurality of series and parallel capacitor networks. Compared with the surface layer structure, the grain boundary layer structure has the following advantages: (1) It has a high apparent dielectric constant; (2) It has high reliability. In the preparation process of boundary layer ceramics, The coat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/622
Inventor 伍媛婷王秀峰
Owner SHAANXI UNIV OF SCI & TECH
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