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Preparation method of geopolymer precursor and product, application and connection method of geopolymer precursor

A geopolymer and connection method technology, applied in the field of preparation of geopolymer precursors, can solve the problems of high preparation and assembly requirements, high temperature and pressure, high connection temperature, etc., and achieve easy operation, low connection cost and high connection strength high effect

Inactive Publication Date: 2020-08-14
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Brazing is usually carried out in a high-temperature sintering furnace with brazing material. The main problem is that the required connection temperature is high, so the cost is high and the energy consumption is high.
Diffusion welding has high requirements for the preparation and assembly of the surface of the weldment, and the size of the weldment is limited by the equipment. The temperature and pressure required for diffusion are high, so the requirements for the equipment are high, resulting in high costs.

Method used

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  • Preparation method of geopolymer precursor and product, application and connection method of geopolymer precursor
  • Preparation method of geopolymer precursor and product, application and connection method of geopolymer precursor

Examples

Experimental program
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Embodiment 1

[0024] The present embodiment provides a kind of preparation method of geopolymer precursor, and specific steps are as follows: Weigh 100g potassium silicate (wherein containing 88wt% K 2 O 3.3SiO 2 ; 2 wt% H 2 O; the rest are other oxide impurities), 5.7g of KOH and 105.3g of deionized water, then mix and place in a 40°C oven for 24h to obtain a transparent alkali activator; then weigh 7.9g of metakaolin and 20.2 The alkali activator described in g, the two are mixed in a stirrer, the stirrer speed is 900r / min, and the stirring time is 10min, the mixture obtained after mixing is the geopolymer precursor, wherein metakaolin contains 54wt % SiO 2 , 43wt% Al 2 o 3 and 3wt% for other oxide impurities (except SiO 2 and Al 2 o 3 Oxide other than), wherein potassium silicate contains 88wt% K 2 O 3.3SiO 2 ; 2 wt% H 2 O; the rest are other oxide impurities (except K 2 O and SiO 2 other oxides).

[0025] Grind the surfaces to be connected of the two alumina ceramic parts t...

Embodiment 2

[0031] The present embodiment provides a kind of preparation method of geopolymer precursor, concrete steps are as follows: 1) take by weighing 100g potassium silicate (wherein containing 88wt% K 2 O 3.3SiO 2 ; 2 wt% H 2 O; the rest are other oxide impurities), 5.7g of KOH and 105.3g of deionized water, then mix and place in a 40°C oven for 24h to obtain a transparent alkali activator; then weigh 8.5g of metakaolin (wherein Contains 54wt% SiO 2 , 43wt% Al 2 o 3 and 3wt% are other oxide impurities) and 21.6g of the alkali activator, the two are mixed in a stirrer, the stirrer speed is 700r / min, and the stirring time is 14min, and the mixture obtained after mixing is geopolymerization precursors.

[0032] Grind the surfaces to be connected of the two ceramic aluminum parts to be connected. If there is oil stain on the polished surface after polishing, use ethanol to clean and remove the oil. After the oil removal is completed, dry it for use.

[0033] Coat the geopolymer p...

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Abstract

The invention provides a preparation method of a geopolymer precursor and a product, application and a connection method of the geopolymer precursor. The preparation method of the geopolymer precursorcomprises the following steps that a1, potassium silicate, KOH and deionized water are taken to be made into an alkali activator, and the mass ratio of potassium silicate to KOH to deionized water is100: 4.9-6.5: 90-115; and a2, metakaolin and the alkali activator prepared in the step a1 are mixed and stirred uniformly to prepare a geopolymer precursor, and the mass ratio of metakaolin to the alkali activator is 70-100: 195-222. The preparation method of the geopolymer precursor provided by the technical scheme of the invention is simple and easy to operate, and the synthetic raw materials are low in cost; connection can be successful at a low temperature by using a drying oven, the connection cost is low, energy is saved, and the environment is protected; and when a ceramic aluminum piece is connected by using the product, the combination is firm without no obvious cracks, and the connection strength of the joint is relatively high.

Description

technical field [0001] The invention belongs to the field of alumina ceramics, and in particular relates to a preparation method of a geopolymer precursor and its product, application and connection method. Background technique [0002] Alumina ceramics are widely used in many fields due to their excellent properties such as high resistivity, high thermal conductivity, corrosion resistance and wear resistance. Due to the poor processing performance of alumina ceramics, it is necessary to connect them when preparing large-sized and complex-shaped products. [0003] The commonly used methods for the connection of alumina ceramics mainly include brazing and diffusion welding. Brazing is usually carried out in a high-temperature sintering furnace using brazing material. The main problem is that the required connection temperature is high, so the cost is high and energy consumption is high. Diffusion welding has high requirements for the preparation and assembly of the surface ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B12/00C04B37/00
CPCC04B12/005C04B37/001C04B2237/30Y02P40/10
Inventor 毛样武康雨航金柏希
Owner WUHAN INSTITUTE OF TECHNOLOGY
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