Graphene/leucite nano-composite ceramic material generated in high-temperature in-situ mode and preparation method thereof

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 dispersion and poor performance, and achieve the effects of good dispersion, uniform distribution and low price

Active Publication Date: 2015-04-22
HARBIN INST OF TECH
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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 p

Method used

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  • Graphene/leucite nano-composite ceramic material generated in high-temperature in-situ mode and preparation method thereof

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specific Embodiment approach 1

[0023] 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 volume ratio of the quality of the graphene oxide powder to deionized water is (1~20)mg:1mL;

[0025] The alkali excitation solution is formed by mixing alkali hydroxide and silica sol with a mass concentration of 25% to 45%; the metal elements in the alkali hydroxide and the mass concentration are 25% to 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 nano-composite ceramic material generated in situ at high temperature is (1.5-2.5):1.

[0028...

specific Embodiment approach 2

[0031]Embodiment 2: This embodiment is different from Embodiment 1 in that: the alkaline hydroxide is potassium hydroxide. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0032] Specific embodiment three: specific embodiment A kind of preparation method of the graphene / garnet nano-composite phase ceramic material of high temperature in-situ generation 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 brown-yellow graphene oxide suspension;

[0034] The mass of described graphene oxide powder and the volume ratio of deionized water are (1~20) mg:1mL;

[0035] 2. Preparation of alkali excitation solution: adding alkali hydroxide to silica sol with a mass concentration of 25% to 45%, magnetic stirring and mixing 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. Preparation of the graphene oxide / alkal...

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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 present invention relates to ceramic materials and methods for their preparation. 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 retardancy. It is environmentally friendly, simple preparation process, and low consumption. It has low energy consumption and shows good application prospects in the fields of construction and aviation. It is worth noting that it can also be used as a precursor material similar to chemically synthesized raw materials. After appropriate simple high-temperature treatment, it can be directly transformed into a garnet ceramic material with superior performance. This is a low-cost preparation of complex shapes. High-performance ceramic materials open up new avenues. At present, our research group has adopted this method to prepare garnet...

Claims

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Application Information

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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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