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Preparation method of high strength high aluminum ceramic thin plate

A technology of high-alumina ceramics and thin plates, which is applied in the field of architectural ceramics, can solve the problems of increasing costs, and achieve the effects of reducing firing temperature, saving raw material costs, and high strength

Inactive Publication Date: 2020-04-10
XIANGYANG GAOMING MINING IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical composition of high alumina reinforced porcelain is A1 2 o 3 The higher the content, the larger the corundum crystal phase with high elastic modulus will be produced in the ceramic body, which will endow the green body with higher strength, but at the same time, it will also increase the firing temperature
For example, "The Development of Medium-temperature High-alumina Reinforced Porcelain" (Foshan Ceramics, 2007, 17(6): 5-7.) prepared A1 with kaolin and industrial alumina as raw materials. 2 o 3 The reinforced porcelain with a content of 30.26% has a fracture strength of 97MPa, but the minimum firing temperature must still reach 1250°C after adding sintering aids. In addition, the introduction of industrial A1 2 o 3 Being an aluminum source also adds to the cost

Method used

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  • Preparation method of high strength high aluminum ceramic thin plate
  • Preparation method of high strength high aluminum ceramic thin plate
  • Preparation method of high strength high aluminum ceramic thin plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Raw material processing: Coal-series kaolin, calcined bauxite, ordinary Henan kaolin, potassium feldspar, albite and talc are ball-milled for 16 hours respectively, and passed through a 250-mesh sieve to obtain ordinary kaolin powder, coal-series kaolin powder, and calcined bauxite powder, potassium feldspar powder, albite feldspar powder and talcum powder, set aside. The specification of the calcined bauxite used is 300 mesh sieve, and the calcining temperature is 1500°C. The chemical composition on the calcined bauxite and the coal measures kaolin is shown in the following table:

[0022] Element SiO 2

al 2 o 3

Fe 2 o 3

TiO 2

CaO MgO K 2 o

Na 2 o

I / L total Calcined bauxite 7.68 85.11 0.85 4.22 0.32 0.24 0.69 0.07 0.38 99.5 Coal series kaolin 48.9 35.46 0.12 0.4 0.038 0 0.03 0 14.7 99.75

[0023] 2) Raw material ratio and mixing: according to the mass percentage of each raw mate...

Embodiment 2

[0031] Raw material processing: Coal-series kaolin, calcined bauxite, ordinary Henan kaolin, potassium feldspar, albite and talc are ball-milled for 20 hours respectively, and passed through a 250-mesh sieve to obtain ordinary kaolin powder, coal-series kaolin powder, and calcined bauxite powder, potassium feldspar powder, albite feldspar powder and talcum powder, set aside. The specification of the calcined bauxite used is 325 mesh sieve, and the calcining temperature is 1500°C. The chemical composition on the calcined bauxite and the coal measures kaolin is shown in the following table:

[0032] Element SiO 2

Al 2 o 3

Fe 2 o 3

TiO 2

CaO MgO K 2 o

Na 2 o

I / L total Calcined bauxite 7.68 85.11 0.85 4.22 0.32 0.24 0.69 0.07 0.38 99.5 Coal series kaolin 48.9 35.46 0.12 0.4 0.038 0 0.03 0 14.7 99.75

[0033] 2) Raw material ratio and mixing: according to the mass percentage of each raw mate...

Embodiment 3

[0041] Raw material processing: Coal-series kaolin, calcined bauxite, ordinary Henan kaolin, potassium feldspar, albite and talc were ball-milled for 18 hours respectively, and passed through a 250-mesh sieve to obtain ordinary kaolin powder, coal-series kaolin powder, and calcined bauxite powder, potassium feldspar powder, albite feldspar powder and talcum powder, set aside. The specification of the calcined bauxite used is 310 mesh sieve, and the calcining temperature is 1500°C. The chemical composition on the described calcined bauxite and on the coal measures kaolin is shown in the table below:

[0042] Element SiO 2

al 2 o 3

Fe 2 o 3

TiO 2

CaO MgO K 2 o

Na 2 o

I / L total Calcined bauxite 7.68 85.11 0.85 4.22 0.32 0.24 0.69 0.07 0.38 99.5 Coal series kaolin 48.9 35.46 0.12 0.4 0.038 0 0.03 0 14.7 99.75

[0043]2) Raw material ratio and mixing: according to the mass percentage of each...

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Abstract

The invention relates to a preparation method of a high strength high aluminum ceramic thin plate. The preparation method comprises following steps: (1) processing raw materials: ball-milling coal based kaolin, calcined bauxite, common kaolin, potash feldspar, soda feldspar, and talcum in a ball-milling machine, sieving, and saving the powder for later use; (2) proportioning and mixing raw materials: weighing raw materials according to percentages by weight, adding a blank enhancer, and mixing to obtain a mixture; (3) carrying out granulation and aging; (4) carrying out semi-dry pressing and moulding; (5) drying; (6) glazing; and (7) sintering: placing a dried blank in a roller kiln, and sintering to obtain the high strength high aluminum ceramic thin plate. Calcined bauxite is used to replace industrial alumina to introduce Al2O3 into the system; densely grown short rod like mullite of coal based kaolin is used to enhance the strength of the thin plate; the impurity namely TiO2 of calcined bauxite and added TiO2 are used to reduce the sintering temperature; the prepared thin plate has the characteristics of high strength and low sintering temperature, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of architectural ceramics, in particular to a method for preparing a high-strength and high-alumina ceramic sheet. Background technique [0002] Ceramic sheet is an energy-saving and environmentally friendly green building material. GB / 723266-2009 "Ceramic Plate" stipulates that it is a kind of thickness not greater than 6m, and the upper surface area is not greater than 1.62m 2 Thin bricks, such a large size requires a greater breaking strength. Chinese invention patent "Manufacturing Method of Large Silicon Oxide Ceramic Plate" (CN201110039459.9) uses acicular wollastonite as the main raw material to prepare a large high-silicon ceramic plate with a fracture strength of 45-50 MPa. The chemical composition of high alumina reinforced porcelain is A1 2 o 3 The higher the content, the larger the corundum crystal phase with high elastic modulus will be produced in the ceramic body, which will endow the green...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/04C04B33/13C04B35/14C04B35/622C04B41/86
CPCC04B33/04C04B33/13C04B33/131C04B35/14C04B35/622C04B41/009C04B41/5022C04B41/86C04B2235/3217C04B2235/3472C04B2235/349C04B2235/5436C04B2235/602C04B2235/656C04B2235/77C04B2235/94C04B2235/95C04B2235/96
Inventor 高世明梁铎张晨毛业勤杨月红
Owner XIANGYANG GAOMING MINING IND CO LTD
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