Light heat-insulated flake-like honeycomb ceramics and preparation method thereof

Abstract

The invention discloses light heat-insulated flake-like honeycomb ceramics and a preparation method thereof. The light heat-insulated flake-like honeycomb ceramics are prepared from the following raw materials in parts by weight: 5-10 parts of aluminum oxide hollow spheres, 40-50 parts of cordierite, 1-3 parts of clay, 3-6 parts of glass beads, 5-10 parts of ZrO2 powder, 5-10 parts of CrO2 powder, 10-15 parts of talcum powder, 3-5 parts of magnesium carbonate, 3-8 parts of epoxidized soybean oil, 4-8 parts of sodium carbonate, 1-3 parts of stearic acid, an appropriate amount of 1mol / L HNO3 solution, 50-60 parts of nanometer aluminum oxide sol, 1-3 parts of 1mol / L La(NO3)3, 1-2 parts of 1mol / L Sr(NO3)2, 0.5-1 part of 1mol / L Co(NO3)2, 2-6 parts of 1mol / L citric acid, and 100-200 parts of deionized water. The light heat-insulated flake-like honeycomb ceramics disclosed by the invention have the advantages of being high in compressive strength, resistant to high temperature, good in chemical stability, high in corrosion resistance and the like.

Description

technical field [0001] The invention relates to ceramic materials, in particular to a light-weight heat-insulating sheet-shaped honeycomb ceramic and a preparation method thereof. technical background [0002] Motor vehicle pollution has become an important source of air pollution in my country and an important cause of haze and photochemical smog pollution. Vehicle exhaust is mainly nitrogen oxides (NO x ), hydrocarbons (HC), carbon monoxide (C0), particulate matter, etc., have become the main air pollutants. Therefore, the most important thing to solve the air pollution problem is to solve the problem of automobile exhaust pollution. [0003] The automobile exhaust purifier is mainly composed of three parts: the shell, the carrier and the catalyst, among which the selection of the catalyst is very important. Three-way catalyst refers to the ability to remove NO at the same time x , HC, CO these three main pollutants catalysts, a large number of experimental studies have...

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Problems solved by technology

Zhu Jie used cordierite honeycomb ceramics as the carrier in his master's thesis "Study on the Catalytic Performance of Cordierite Honeycomb Ceramics Loaded La-Sr-Co-O on Automobile Exhaust Gas", La-Sr-Co-O perovskite composite oxidation As the active component of the catalyst, a monolithic automobile exhaust catalyst has been prepared, but the heat resistance of the prepared ceramic carrier is not high enough, and once the monolithic catalyst is damaged, it needs to be replaced as a whole, which wastes resources and increases the cost of use.