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A graphene/garnet nanocomposite ceramic material produced in situ at high temperature and its preparation method

A technology of in-situ generation and multiphase ceramics, which is applied in the field of ceramic materials and its preparation, can solve the problems of poor performance and poor dispersion, and achieve the effects of uniform distribution, good dispersion and low ceramicization temperature

Active Publication Date: 2016-07-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that the existing graphene has poor dispersion when added to ceramics, resulting in poor performance, and provides a graphene / garnet nano-composite ceramic material generated in situ at high temperature and a preparation method thereof

Method used

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  • A graphene/garnet nanocomposite ceramic material produced in situ at high temperature and its preparation method

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specific Embodiment approach 1

[0023] Specific embodiment 1: In this embodiment, a graphene / garnet nanocomposite ceramic material generated in situ at high temperature is prepared from graphene oxide suspension, alkali excitation solution and metakaolin powder;

[0024] The graphene oxide suspension is formed by mixing graphene oxide powder and deionized water; the mass ratio of the graphene oxide powder to the volume of deionized water is (1-20) mg: 1 mL;

[0025] The alkali excitation solution is made by mixing alkali hydroxide and silica sol with a mass concentration of 25%-45%; the metal element and mass concentration in the alkali hydroxide is 25%-45% The molar ratio of silicon in the silica sol is 1:(0.5~1.5);

[0026] The volume ratio of the graphene oxide suspension to the alkali excitation solution is 1: (1.5-2.5);

[0027] The molar ratio of silicon element to aluminum element in the graphene / garnet nanocomposite ceramic material generated in situ at high temperature is (1.5-2.5):1.

[0028] The deionized ...

specific Embodiment approach 2

[0031] Specific embodiment two: This embodiment is different from the specific embodiment one in that the alkaline hydroxide is potassium hydroxide. Others are the same as the first embodiment.

specific Embodiment approach 3

[0032] Specific embodiment three: specific embodiment A method for preparing a graphene / garnet nanocomposite ceramic material generated in situ at a high temperature is carried out according to the following steps:

[0033] 1. Preparation of graphene oxide suspension: uniformly disperse graphene oxide powder in deionized water and ultrasonically treat it for 2h-6h to obtain a brown-yellow graphene oxide suspension;

[0034] The mass ratio of the graphene oxide powder to the volume of deionized water is (1-20) mg: 1 mL;

[0035] 2. Preparation of alkaline excitation solution: Add alkaline hydroxide to silica sol with a mass concentration of 25% to 45%, and mix with magnetic stirring for 24h to 72h to obtain an alkali excitation solution;

[0036] The molar ratio of the metal element in the alkaline hydroxide to the silicon element in the silica sol with a mass concentration of 25% to 45% is 1: (0.5 to 1.5);

[0037] 3. The preparation of graphene oxide / alkali excitation mixture: add the ...

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Abstract

The invention relates to a ceramic material and a preparation method of the ceramic material, in particular to a graphene / leucite nano-composite ceramic material generated in a high-temperature in-situ mode and a preparation method of the graphene / leucite nano-composite ceramic material. The graphene / leucite nano-composite ceramic material and the preparation method aim to solve the problem that because graphene added into ceramic is poor in dispersity, the ceramic is poor in performance. The graphene / leucite nano-composite ceramic material generated in the high-temperature in-situ mode is prepared from a graphene oxide suspension, an alkali-activated solution and metakaolin powder. The preparation method comprises the steps of preparing the graphene oxide suspension, preparing the alkali-activated solution, preparing graphene oxide / alkali-activated mixed liquor, preparing graphene / aluminosilicate polymer precursor slurry, carrying out curing forming of a precursor, and carrying out high-temperature treatment. The preparation method can be used for preparing the graphene / leucite nano-composite ceramic material generated in the high-temperature in-situ mode.

Description

Technical field [0001] The invention relates to a ceramic material and a preparation method thereof. Background technique [0002] Aluminosilicate polymer is a special kind of inorganic polymer material with amorphous structure. It has the advantages of low density, low cost, high temperature resistance, heat resistance, and good flame retardant performance. It is environmentally friendly, simple in preparation process, and consumes Low energy consumption, showing good application prospects in construction and aviation. It is worth noting that it can also be similar to the raw material of chemical synthesis, and can be used as a precursor material. After appropriate simple high-temperature treatment, it can be directly transformed into a garnet ceramic material with superior performance. This is both for low-cost preparation of complex shapes. High-performance ceramic materials opened up new ways. At present, our research group has used this method to prepare garnet ceramic mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/44C04B35/52C04B35/622
Inventor 何培刚闫姝段小明杨治华贾德昌周玉
Owner HARBIN INST OF TECH
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