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Preparation method of Y2O3-doped MA-CA2-CA6 composite material

A technology of MA-CA2-CA6 composite materials, which is applied in the field of preparation of MA-CA2-CA6 composite materials, can solve the problems of lack of research on refractory materials

Inactive Publication Date: 2018-12-07
QIDONG CHUANGLU NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Currently, for Al 2 o 3 -Related research on MgO-CaO-based refractory materials is mainly concentrated in the field of porous materials. 2 o 3 -Research on MgO-CaO refractories is relatively lacking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] a doped Y 2 o 3 MA-CA 2 -CA 6 The preparation method of composite material, comprises the steps: with 70 parts of Al 2 o 3 , 15 parts MgO and 20 parts CaCO 3 Mix, dry mix with a ball mill for 12 hours, and then dry in a desiccator; press the dried raw materials at 38MPa to make a sample, and then raise the temperature of the pressed sample to 1100°C for a sintering, keep it warm for 3.5 hours and then follow the furnace Cool slowly to room temperature, grind the sample after primary sintering, add 5 parts of Y 2 o 3 , after mixing, make a secondary sample at 140MPa, raise the temperature to 1550°C for secondary sintering, keep warm for 3h, and slowly cool to room temperature with the furnace; all raw materials are parts by weight.

Embodiment 2

[0018] a doped Y 2 o 3 MA-CA 2 -CA 6 The preparation method of composite material, comprises the steps: with 65 parts of Al 2 o 3 , 10 parts MgO and 15 parts CaCO 3 Mix, dry mix with a ball mill for 11 hours, and then dry in a desiccator; press the dried raw materials at 37MPa to form a sample, then raise the temperature of the pressed sample to 1050°C for a sintering, keep it warm for 3 hours, and slowly follow the furnace Cool to room temperature, grind the sample after primary sintering, add 4 parts of Y 2 o 3 , after mixing, make a secondary sample at 135MPa, raise the temperature to 1540°C for secondary sintering, keep warm for 2.5h, and slowly cool to room temperature with the furnace; all raw materials are parts by weight.

Embodiment 3

[0020] a doped Y 2 o 3 MA-CA 2 -CA 6 The preparation method of composite material, comprises the steps: with 75 parts of Al 2 o 3 , 20 parts MgO and 25 parts CaCO 3 Mix, dry mix with a ball mill for 13 hours, and then dry in a desiccator; press the dried raw materials at 39MPa to form a sample, then raise the temperature of the pressed sample to 1150°C for a sintering, keep it warm for 4 hours, and slowly follow the furnace Cool to room temperature, grind the sample after primary sintering, add 6 parts of Y 2 o 3 , after mixing, make a secondary sample at 145MPa, raise the temperature to 1560°C for secondary sintering, keep warm for 3.5h, and slowly cool to room temperature with the furnace; all raw materials are parts by weight.

[0021] The method is simple, quick and easy to operate, and the prepared doped Y 2 o 3 MA-CA 2 -CA 6 The composite material has compact structure, enhanced cold compressive strength, and can be prepared on a large scale.

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PUM

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Abstract

The invention discloses a preparation method of a Y2O3-doped MA-CA2-CA6 composite material. The preparation method comprises the following steps: mixing Al2O3, MgO and CaCO3, carrying out dry mixing by virtue of a ball mill for 11-13 hours, and putting the mixture into a dryer for drying; pressing the dried raw material at 37MPa-39MPa into a primary sample, heating the sample to 1050-1150 DEG C, carrying out primary sintering, maintaining the temperature for 3-4 hours, carrying out slow furnace cooling to the room temperature, finely grinding primarily sintered sample, adding Y2O3, uniformly mixing, and preparing a secondary sample at 135MPa-145MPa, heating to 1540-1560 DEG C, carrying out secondary sintering, maintaining the temperature for 2.5-3.5 hours, and carrying out slow furnace cooling to the room temperature. The preparation method is simple, convenient and easy in operation, the prepared Y2O3-doped MA-CA2-CA6 composite material is compact in structure and can be prepared in alarge scale, and the cold state compressive strength is improved.

Description

technical field [0001] The present invention relates to a doped Y 2 o 3 MA-CA 2 -CA 6 Methods of preparation of composite materials. Background technique [0002] The refractory materials used in the lining of industrial high-temperature kilns must have good density. Using refractory raw materials with low theoretical density or forming refractory phases with low theoretical density through reaction is an effective way to achieve its weight reduction. in Al 2 o 3 In the -MgO-CaO ternary phase diagram, the temperature at which the liquid phase appears is higher than 1730 ° C, which proves that high refractoriness refractory materials can be designed in this region, especially in the sub-system Al 2 o 3 --MgAl 2 o 4 -CaAl 4 o 7 In the region, the temperature of the liquid phase is as high as (1850±10) °C, and the mineral CaAl contained in the system 4 o 7 (or CaO 2Al 2 o 3 ) has a smaller true density. Therefore, to the currently widely used Al 2 o 3 -Introdu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/443C04B35/44C04B35/66
CPCC04B35/443C04B35/44C04B35/66C04B2235/3225C04B2235/442C04B2235/661
Inventor 不公告发明人
Owner QIDONG CHUANGLU NEW MATERIAL CO LTD
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