Heat-insulating ceramic fiber material and preparation method thereof

Abstract

The invention relates to a heat-insulating ceramic fiber material and a preparation method thereof. The preparation method comprises the following steps: mixing ferric nitrate and chromium nitrate with deionized water, citric acid and ethylene glycol into sol, dipping ceramic fiber into the sol, and taking out and drying as well as carrying out heat treatment at the temperature of 250 to 600 DEG C to obtain the heat-insulating ceramic fiber material coated with high near infrared reflecting pigment layer. The heat-insulating ceramic fiber material and the preparation method have the advantages that the process is simple, the thermal conductivity of the materials manufactured is low and can reach 0.048W / (M.K), and the heat-insulating effect is good.

Description

technical field

[0001] The invention relates to a ceramic fiber thermal insulation material and a preparation method thereof, belonging to the technical field of material science. Background technique

[0002] Ceramic fiber products have been widely used in aerospace and other fields in recent years due to their good high-temperature thermal insulation properties. With the rapid development of technologies such as aerospace and advanced weapons and equipment, the demand for low thermal conductivity heat insulation materials is becoming more and more urgent, and the performance requirements for heat insulation materials are also getting higher and higher. With the development of high-tech equipment such as ultra-high-speed aircraft and high-power engines, the problem of heat insulation has become a hot spot that people pay more and more attention to, and it has also become one of the key factors restricting the development of high-tech equipment. For many industrial equipmen...