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Position:Jinlin fused alumina>>Industry News>> Alumina Powder Corresponding Modification Method

Alumina Powder Corresponding Modification Method

Author:Jinlin corundumTo update: 2016-10-14

See this title, you will be wondering, alumina powder can be modified? Will its use be modified after modification? Similar to this problem will appear in our minds, please follow our footsteps, let us to your question. The following is my company for the alumina powder corresponding modification methods of overview.
According to our understanding of white fused alumina powder and alumina powder how to distinguish, I believe you must have a new understanding of alumina powder. Alumina powder has a high melting point, excellent mechanical strength, hardness, high resistivity and thermal conductivity, can be widely used in electronic equipment, structural ceramics, refractories, wear-resistant materials, polishing materials and other industries.
I. To promote the sintering class of alumina modification
Alumina ceramic support is sintered by nano-alumina, which is made of α-alumina powder and sintered at high temperature. Alumina needs to be sintered at 1700 ° C, and energy consumption is very high. Although sintering temperature can be reduced by adding some low-temperature raw materials, liquid sintering is mainly used for low temperature sintering. Liquid phase material accumulates in the neck of alumina particles, Strength is not high, so that the overall strength of the sintered body decreased significantly.
Nano-alumina to promote the principle of sintering:
The principle of nano-alumina sintering is to form a layer of nanometer aluminum hydroxide sol on the surface of alumina particles by solvothermal method, then form a layer of nano-alumina coating on the surface of alumina powder by low-temperature calcination, aluminum coating to achieve sintering of the ceramic membrane support without introducing other impurities.
II. To improve the surface wetting of the modified particles

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1. Alumina powder particles toughened stainless steel-based materials;
Ceramic particle reinforced metal matrix composites are the hotspots of metal composites. In the corrosion-resistant stainless steel by adding stability, high hardness, wear-resistant corrosion-resistant alumina particles on one hand can make up for the lack of wear resistance of stainless steel, and can solve a single ceramic body molding difficulties, brittle fracture the problem. However, the liquid phase metal at the time of sintering is difficult to wet the surface of the alumina particles, leading to failure of the composite material to achieve the desired strength. The alumina particles are subjected to surface roughening treatment in advance and then chemically deposited on the surface of the alumina particles the method of surface modification coated with nickel can effectively improve the wettability of the particles and the matrix material and improve the performance of the composite material.
2. Alumina powder composite polymer materials
Alumina powder with high insulation, heat and abrasion resistance widely used as filler of polymer materials, with the sheet of alumina powder filled in engineering plastics, is conducive to improving the compressive strength of engineering materials, impact strength. However, the alumina powder and the resin also have a problem of wettability. Therefore, it is necessary to modify the surface of the alumina powder with a coupling agent before use so that the resin can well wet the surface of the alumina powder, performance of polymer composites.
Shizui Mountain Jinlin Fused Alumina Refractories Co., Ltd. is a diversified production plant, set the development, production, sales and service in one. The company mainly produces fused alumina products, brown fused alumina,white fused alumina, silicon carbide, bauxite, alumina ball, garnet, alumina powder, zircon sand, castable and other products specializing in the production and processing company, with a complete and scientific quality management system.
These are my company for alumina powder corresponding modified method of analysis, I hope you can help. Thank you for reading, please continue to pay attention to our website!

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