High-porosity thin microporous composite ceramic plate and preparation method thereof

Abstract

The invention discloses a high-porosity composite ceramic plate, which is composed of a matrix layer, a transition layer and a nano metal particle surface layer, the transition layer is a combinationlayer of the surface layer and the matrix layer and is used for forming a transition plane between a microbubble material and the metal particle surface layer, and the matrix layer structure containscombined closed pores with alternate large and small pores. And a cured metal coating is attached to the upper surface of the matrix layer, so that the matrix layer has antibacterial and bacteriostatic properties and photocatalytic degradation performance of organic pollutants. The ceramic plate is formed by secondary foaming and firing and comprises a low-temperature pre-foaming stage and a medium-high-temperature foaming stage, wherein the pre-foaming is completed by a granular organic foaming agent, and the medium-high temperature foaming is completed by a composite inorganic foaming agent.The prepared composite ceramic plate is high in closed porosity, low in heat conductivity coefficient and low in volume density, and the preparation method can effectively reduce the firing temperature and shorten the firing time.

Description

technical field [0001] The invention relates to the field of foamed composite ceramic plates, in particular to a high-porosity thin foamed composite ceramic plate with alternating large and small holes and a preparation process thereof. Background technique [0002] Foamed ceramics is a honeycomb ceramic material mixed with solid phase and gas phase, which is produced by mixing foaming agent with clay, quartz and other inorganic raw materials, through grinding, powdering, molding, sintering and other processes. Due to its unique properties of heat insulation, heat preservation, sound insulation, fire prevention, moisture resistance, and light weight, it is widely used in the field of construction and heat insulation. At present, a variety of high-temperature foamed ceramic insulation boards for building exterior wall insulation and roof insulation have been gradually developed, but the current products still have many problems such as poor heat insulation effect, high water ...

AI Technical Summary

Problems solved by technology

[0011] 1) The foaming degree of the product is low, and there are a large number of communicating holes, which makes the product have a high thermal conductivity and poor thermal insulation effect;

[0012] 2) Lack of industrial standard control of raw materials and quality: In the existing technology, various tailings materials and factory ceramic wastes are usually used as the main materials. Although the cost can be reduced, the performance of the product varies with the quality of the raw materials. Larger, unable to obtain products with stable performance, resulting in poor industrial applicability;

[0013] 3) There are few studies on composite ceramic panels containing foamed materials. In the existing composite technology, one side of the foamed ceramics is usually coated with an adhesive, and the decorative material layer is pasted to obtain a composite panel; or the foamed material is directly spread on ceramic tiles, etc. The surface of the molding material is simply pasted and bonded or fired directly to obtain a composite panel

Obviously, the existing bonding layer of this composite process is not

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