High strength and low thermal conductivity ceramic fiber thermal insulation material and preparation method thereof

Abstract

The invention relates to a high-strength low-thermal conductivity ceramic fiber thermal insulation material and a preparation method thereof. According to the technical scheme of the high-strength low-thermal conductivity ceramic fiber thermal insulation material and the preparation method thereof, titaniferous raw material, magniferous raw material and binding agents are uniformly mixed, grinding is conducted after molding and thermal treatment are conducted, and A material with particle size ranging from 0.088-1 mm and B material with particle size smaller than 0.088 mm are obtained; potassic raw material, titaniferous raw material and the binding agent are uniformly mixed, grinding is conducted after molding and thermal treatment are conducted, and c material with particle size smaller than 0.088 mm is obtained; then the A material, the B material, the C material and the potassic raw material are mixed uniformly, grinding is conducted after thermal treatment is conducted, and D material with particle size ranging from 0.088-1 mm is obtained; the pretreated ceramic fiber, the B material, the C material, the D material, the binding agent and additive are mixed uniformly, water is added, stirring is conducted, the mixed solution is poured into a die, and the high-strength low-thermal conductivity ceramic fiber thermal insulation material is obtained through the steps of vacuum dewatering, drying and thermal treatment. The high-strength low-thermal conductivity ceramic fiber thermal insulation material and the preparation method thereof have the advantages are low in cost, the prepared product is low in volume density, high in breaking strength and low in high-temperature heat conductivity coefficient.

Description

technical field [0001] The invention belongs to the technical field of ceramic fiber thermal insulation materials. In particular, it relates to a high-strength and low-thermal-conductivity ceramic fiber thermal insulation material and a preparation method thereof. Background technique [0002] Thermal insulation is one of the important measures to save energy and ensure sustainable economic development. The development of high-temperature industry has put forward higher requirements for thermal insulation materials, such as high efficiency, energy saving, high strength, low conductivity, waterproof, etc. For this reason, people have been seeking and researching new thermal insulation materials for high-temperature industries with low thermal conductivity, high infrared reflectivity and microporosity. [0003] Ceramic fiber is a fibrous lightweight refractory material. The thermal insulation material made of it has the advantages of high temperature resistance, good thermal...

AI Technical Summary

Problems solved by technology

[0005] Although the above-mentioned technologies have obvious advantages, they still have the following disadvantages: (1) The introduced organic additives, adhesives or binders are carbonized and decomposed at high temperatures, which are prone to produce dense smoke and irritating gases, polluting the environment; (2) Some raw materials introduced Or the melting point of the additive is low, and the low melting point liquid phase produced intensifies the shrinkage of the ceramic fiber and reduces the service life of the product; (3) the strength is small, and it is prone to compression and deformation after being subjected to external stress, mechanical vibration or air flow, etc. Affect the structural stability of the thermal insulation lining and weaken the thermal insulation effect; (4) Potassium titanate whiskers, microbeads, etc. are introduced in the form of direct addition, and their distribution form cannot be controlled in the material, and can only be distributed in the form of "scattering" in the ceramic fiber between, making the thermal insulation effect of the material greatly reduced