As a potential high-quality high-temperature ceramic structure refractory material-aluminum titanate (Al2TiO5), although it has the disadvantages of low strength and easy to decompose, but it has low expansion and high temperature resistance that other high-temperature materials cannot have, and is subject to attention.
Performance analysis, characteristics and application of aluminum titanate refractories
Since its discovery, scientists have made a lot of research on aluminum titanate refractory materials, whether in theory or in practice, there are breakthroughs, but in order to make aluminum titanate more widely used, scientists must further Two issues are discussed in depth.
First, how to better overcome the contradiction between low expansion and low strength of aluminum titanate, that is, in order to obtain low expansion, there must be cracks in the material, and increasing the strength of the material requires that the crack size must be as small as possible contradiction.
Secondly, how to improve the decomposition resistance of aluminum titanate ceramics, especially the decomposition aging between 800 ～ 1300 ℃.
1. Performance characteristics of aluminum titanate (Al2TiO5) refractories:
Stable aluminum titanate can be made into a product alone, or it can be made into a composite with other materials. Sometimes a small amount of aluminum titanate can be added to modify other materials, and there are also aluminum titanate-based composite materials with its main component.
The prepared stabilized aluminum titanate and its composite materials can be widely used in harsh environments such as high temperature resistance, thermal shock resistance, wear resistance, corrosion resistance, and alkali resistance.
2. Application status of aluminum titanate (Al2TiO5) refractories:
It can be used in ceramic kilns as kiln furniture materials, thereby changing the current status of kiln furniture materials with low service life and dependence on imports in my country;
It can be made into a honeycomb ceramic body for purifying automobile exhaust catalyst carrier or heat exchanger;
In short, aluminum titanate has attracted the attention of materials scientists at home and abroad as a high-quality high-temperature structural material.
By rationally selecting additives, raw material composition and process, and controlling the material organization structure, optimization of material properties can be achieved.