Method for preparing mineral bonding materials and composite materials thereof from phosphoric acid and aluminium-silicon materials

Abstract

The present invention relates to one kind of mineral bonding material prepared with phosphoric acid and alumina and silica material at relatively low temperature and its composite material. At relatively low temperature, alumina and silica material with reaction activity and phosphoric acid produce bonding reaction to form one kind of amorphous solid mineral bonding Al-Si-P material. The mineral bonding Al-Si-P material may be used as base material and added with bauxite, silica powder, flyash, mineral slag, fiber, etc to prepare various kinds of composite material with different performances. The composite materials may be cast or pressed to form optionally without needing of introducing alkali earth ions, and the prepared material has high durability, high mechanical strength and good high temperature performance.

Description

technical field [0001] The invention relates to the preparation technology of functional inorganic non-metallic materials such as high-temperature materials, corrosion-resistant materials and structural materials, in particular to a method for preparing mineral bonding materials and composite materials thereof with phosphoric acid and aluminum-silicon materials. Background technique [0002] It is well known that the synthesis and preparation of solid-state materials often involve solid-state reactions. Traditional solid-state reactions need to be carried out under high temperature and high pressure conditions. However, under high temperature and other conditions, there are defects such as difficulty in controlling the macroscopic and microstructural characteristics of materials, low reaction speed, and unstable material properties. The technology of preparing solid materials by low-temperature solid-state reaction has become the direction that people pursue. [0003] The e...

AI Technical Summary

Problems solved by technology

The disadvantage is that the castable can only obtain higher strength (about 20MPa) under high temperature conditions (compiled by Guan Shiwen. High alumina refractory castables use kaolin, metakaolin and silica powder fillers, foreign refractory materials. 2003.28 (2): 12 ~17)

[0006] 3. The disadvantage of refractory castables that use phosphate as a chemical combination is that it is difficult to react with ordinary aluminum-silicon materials at room temperature. For this reason, MgO fine powder or aluminate cement is added to make the refractory castable harden (Han Xinglu Edited. Unshaped Refractories (Second Edition), Beijing: Metallurgical Industry Press, 2003)

The introduction of these metal ions often causes the problem of lower high temperature characteristics of the system

The autotrophic strength of the latter two is low, and the main reaction process of the solid phase needs to be carried out under high temperature conditions.