A kind of preparation method of graphene conductive alumina ceramics

A technology of alumina ceramics and graphene, which is applied in the field of composite functional ceramic materials, can solve problems such as limited application development, high cost, and production difficulties, and achieve the effects of improving economic and practical value, overcoming bubbling, and broadening the application surface

Active Publication Date: 2021-07-30
SHANGHAI LEVSON ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This conductor material is mainly used in SOFC electrode materials, oxygen sensors and oxygen-permeable membrane materials, etc. This kind of multi-phase mixed conductor material not only requires the material to have good the

Method used

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  • A kind of preparation method of graphene conductive alumina ceramics
  • A kind of preparation method of graphene conductive alumina ceramics

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Dispersion of graphene in liquid silica gel:

[0036] The selected features are: lamellar structure, number of layers ≤ 5 layers, stack thickness -3 Ω·cm graphene powder 5g; divided into two parts on average, added to the AB two-component addition type liquid silicone gel that meets the conditions, that is, 2.5g graphene powder was added to component A, and 2.5g graphene powder was added to component B. Add 2.5g graphene powder (if the two components are mixed in advance, it is easy to be partially overheated and vulcanized during the ultrasonic treatment process, and because there is a certain room temperature operating time, in order to prevent the silicone gel from vulcanizing in advance, so in Before the graphene is completely dispersed, the two parts cannot be mixed together), and then use 1KW ultrasonic power to ultrasonically disperse the silicone gels of components A and B added with graphene for 2hrs, and keep the temperature of the system <30°C ; The preferre

Embodiment 2

[0047] (1) Dispersion of graphene in liquid silica gel:

[0048] The selected features are: lamellar structure, number of layers ≤ 5 layers, stack thickness -3 Ω·cm graphene powder 5g; divided into two parts on average, added to the AB two-component addition type liquid silicone gel that meets the conditions, that is, 2.5g graphene powder was added to component A, and 2.5g graphene powder was added to component B. Add 2.5g of graphene powder, and then use 1KW of ultrasonic power to ultrasonically disperse the silicone gels of components A and B added with graphene for 2hrs, and keep the temperature of the system <30°C; The mass ratio of the two-component silica gel is: graphene: two-component silica gel (component A + component B) = 1:12.5.

[0049] (2) Compounding, surface treatment and drying of alumina powder:

[0050] Four alumina powders with different particle sizes that meet the characteristic conditions are selected to be packed according to the Horsfield dense packing t

Embodiment 3

[0059] (1) Dispersion of graphene in liquid silica gel:

[0060] The selected features are: lamellar structure, number of layers ≤ 5 layers, stack thickness -3 Ω·cm graphene powder 5g; divided into two parts on average, added to the AB two-component addition type liquid silicone gel that meets the conditions, that is, 2.5g graphene powder was added to component A, and 2.5g graphene powder was added to component B. Add 2.5g of graphene powder, and then use 1KW of ultrasonic power to ultrasonically disperse the silicone gels of components A and B added with graphene for 2hrs, and keep the temperature of the system <30°C; The mass ratio of the two-component silica gel is: graphene: two-component silica gel (component A + component B) = 1:12.5.

[0061] (2) Compounding, surface treatment and drying of alumina powder:

[0062] Five kinds of alumina powders with different particle sizes that meet the characteristic conditions are selected to be packed according to the Horsfield dense

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Abstract

The invention provides a preparation method of graphene conductive alumina ceramics, which utilizes the physical and chemical stability, unique sheet structure and excellent electrical conductivity of graphene materials to improve the strength and toughness of alumina ceramics, and endows alumina ceramics with conductive function; the invention belongs to the field of inorganic functional composite materials, and its preparation method is: (1) dispersion of graphene in liquid silica gel; (2) coordination, surface treatment and drying of alumina powder; (3) ) uniform mixing of silica gel dispersed with graphene and aluminum oxide powder through compounding and surface treatment; (4) molding and hot molding vulcanization and product size modification of materials mixed in step (3); 5) Preliminary hot-pressing cracking to form the vulcanized product in (4); (6) Vacuum high-temperature sintering of the preliminary cracked product to finally obtain an alumina ceramic material product with good compactness, excellent mechanical properties, and electrical conductivity.

Description

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Claims

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Application Information

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Owner SHANGHAI LEVSON ENTERPRISE GRP
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