High-strength high-ductility ceramic slab and preparation method thereof

Abstract

The invention relates to a high-strength high-ductility ceramic slab and a preparation method thereof. The preparation method includes the steps such as preparation of green bodies, assembling of facilities for a ceramic production line and a glazing line, digital printing and high-temperature firing. By application of the optimum formula with high aluminum, high potassium and low calcium and magnesium, loss on ignition is low; through the improved firing process, the green bodies have low shrinkage, wide range of temperature and high quenching-cracking resistance performance; since polishingis carried out through rigid abrasive blocks and flexible abrasive blocks alternatively, polishing cutting output is reduced and cutting output of the green bodies can be controlled effectively accurately. The ceramic slab prepared by the method has the advantages of high strength and high ductility, and its modulus of rupture is up to 52Mpa.

Description

technical field [0001] The invention relates to the field of ceramic slabs, in particular to a high-strength and high-toughness ceramic slab and a preparation method thereof. Background technique [0002] "No big slab, no big brand", we can see the current trend of ceramic slabs (bricks). In recent years, whether it is at the CERSAIE exhibition in Bologna, Italy, or at various technical seminars related to the ceramic industry at home and abroad, or even in the promotion of large-scale ceramic equipment and production enterprises, ceramic slabs (bricks) and their forming equipment have become the most popular products without exception. Most compelling product. According to the standard of GB / T23266-2009, ceramic slabs (bricks) refer to ceramic tile products with a thickness not greater than 6mm and a surface area not less than 1.62m2. Compared with stone, ceramic slabs (bricks) have many advantages, such as uniform texture, high strength, isotropy, low water absorption, a...

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Problems solved by technology

[0003] In the prior art, CN107827435A invented a ceramic slab, including the following raw materials by weight ratio: fly ash 35-60%, waste glass 5-10%, kaolin 5-12%, foaming agent 0.1-0.5% %, potassium feldspar 10-20%, albite 10-2%, ceramic tile polishing waste 5-30%, electrolyte 0.1-0.2%; in addition, CN108424111A invented a large ceramic slab, the green body of which is according to the chemical composition The points include 17~24% Al2O3, 60~70% SiO2, 3~7% K2O+Na2O, 1~3% MgO and 7~17% loss on ignition by weight percentage; Ceramic slabs are weak in strength and poor in toughness. Furthermore, problems such as shrinkage, rapid cooling cracking, and deformation and bending are prone to occur during the calcination process. This is also a difficult point in the preparation of ceramic slabs, which also limits the batch size of domestic ceramic slabs. production, which affects the broadening of the market