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Environmentally-friendly and low-shrinkage ceramic and preparation method thereof

A technology for ceramic bricks and ceramic bodies, applied in the production of ceramic materials, clay products, other household appliances, etc., can solve the problems of unfavorable body size control, large body shrinkage, increased cost, etc., to reduce firing shrinkage, The effect of improving performance and environmental strength

Active Publication Date: 2020-01-17
MONALISA GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But when too much is added, the green body will shrink greatly, which is not conducive to the control of the size and shape of the green body, and the later processing. Therefore, the size of the green body is often increased by enlarging the mold, and each pressed green body needs more More powder, and the increase in the purchase of molds and powder will increase the cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The preparation method of the ceramic green body is not particularly limited, and can be prepared by methods known in the art, for example, the raw materials of the ceramic green body can be mixed and ball milled, granulated, and pressed to form a ceramic green body. The ball milling method may be wet ball milling or the like. The granulation method can be powder spraying granulation and the like. Iron removal and aging can be carried out before granulation. The pressing pressure can be 30000-70000KN.

[0027] The ceramic body can be fired to obtain ceramic tiles, and can also be post-processed on the ceramic body as required, such as pattern decoration, glazing, etc., and then fired to obtain ceramic tiles. The pattern decoration method is, for example, inkjet printing or the like. Before firing, the ceramic body can be dried first, for example, it can be dried at 200-250°C for 55-80 minutes. The highest firing temperature can be 1150-1180°C. The firing cycle can ...

Embodiment 1

[0037] Step 1: Proportioning and mixing of raw materials: according to the mass percentage of raw materials: ball clay 20%, medium temperature sand: 37%, high temperature sand: 19%, press filter residue 20%, calcined bauxite: 4%, and in the basic raw materials Add silicon carbide foaming agent: 0.005% on the basis of basic raw materials, add green body reinforcing agent: 0.2% on the basis of basic raw materials, and mix them uniformly by ball milling for 15 hours to obtain a mixture.

[0038] Step 2: stale and granulate: use spray drying, granulate and stale for 24 hours.

[0039] Step 3: Compression molding: compression molding by a press, and the compression pressure is 30000kN.

[0040] Step 4: Firing: After the body is inkjet printed and glazed, it is fired in a high-temperature roller kiln with a maximum firing temperature of 1160°C and a cycle of 63 minutes.

[0041] According to the national standard GB / T 3810 "Test Method for Ceramic Tiles", the water absorption rate ...

Embodiment 2

[0043] The difference from Example 1 is that the silicon carbide foaming agent is added in an amount of 0.01%.

[0044] According to the national standard GB / T 3810 "Test Method for Ceramic Tiles", the water absorption rate is 0.087%, the dry strength of the green body is 1.87MPa, the flexural strength reaches 48MPa, the shrinkage rate is 9.63%, and the appearance is smooth without warping, which is the same as that of Comparative Example 1. Ratio, the shrinkage rate is reduced by 1.21%, and it does not affect the drying and flexural strength of the green body. According to the drainage method test, the bulk density is 2.35g / cm 3 .

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Abstract

The invention provides environmentally-friendly and low-shrinkage ceramic and a preparation method thereof. A ceramic green body comprises the following raw materials: a basic raw material and siliconcarbide, wherein the silicon carbide is 0.005 to 0.01 percent of the mass of the basic raw material. A small amount of silicon carbide foaming agent is added, so the firing shrinkage of the green body is reduced under the condition of not influencing the strength of the green body.

Description

technical field [0001] The invention relates to low-shrinkage ceramics and a preparation method thereof, and belongs to the technical field of ceramic tile production and manufacture. Background technique [0002] The raw materials used in the body of ceramic wall and floor tiles include clay, feldspar and quartz raw materials. The raw materials are ball milled, granulated and pressed with a certain ratio, and fired at high temperature in a roller kiln to obtain low water absorption and High-strength ceramics. In response to the call for environmental protection, a high amount of waste slag is added to the formula to reduce the impact of waste slag on the environment and recycling of waste slag, and waste slag is a low-temperature material similar to feldspar. By substituting part of feldspar raw materials, production costs are reduced. But when too much is added, the green body will shrink greatly, which is not conducive to the control of the size and shape of the green bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/16C04B33/132C04B33/13C04B33/04C04B41/86
CPCC04B33/16C04B33/1324C04B33/13C04B33/04C04B41/86C04B41/5022C04B2235/96Y02P40/60
Inventor 萧礼标程科木王贤超杨元东汪庆刚
Owner MONALISA GRP CO LTD
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