High temperature and creep resistance corundum-mullite load bearing board and preparation method thereof

A creep-resistant and setter technology, applied in the field of refractory material preparation and ceramics, can solve the problems of easy deformation and low use temperature of corundum-mullite setter, so as to improve the service temperature and improve the thermal vibration resistance. Effect

Active Publication Date: 2009-05-06
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the shortcomings of the current corundum-mullite setter plate, which is low in service temperature and easy to deform at high temperature, and to provi

Method used

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  • High temperature and creep resistance corundum-mullite load bearing board and preparation method thereof
  • High temperature and creep resistance corundum-mullite load bearing board and preparation method thereof
  • High temperature and creep resistance corundum-mullite load bearing board and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 85% of α-Al with a particle size of 5-0.088mm 2 o 3 Granular material, 7.5% fused mullite fine powder with particle size less than 0.088mm, 7.5% aluminum-silicon sol 700°C calcined material (Al 2 o 3 Content 72%), plus 4% PVA as a binding agent,

[0029] Its process steps are as follows:

[0030] 1) Mixing: Put the raw materials into the mixer according to the above ratio and mix evenly;

[0031] 2) Trapped material: put the above-mentioned homogeneously mixed material in a closed state for 12 hours;

[0032] 3) Molding: weigh the material prepared in step 2 and put it into a mold for molding with a molding pressure of 150Mpa;

[0033] 4) Drying: the molded green body is first dried naturally for 2 days, and then dried at 110°C for 24 hours;

[0034] 5) Firing: After drying, heat preservation at 1500°C for 6 hours to obtain setter products.

[0035] The properties of the obtained high temperature creep resistant corundum-mullite setter plate are shown in Table 2 ...

Embodiment 2

[0039] 80% of α-Al with a particle size of 5-0.088mm 2 o 3 Granular material, 10% fused mullite fine powder with particle size less than 0.088mm, 10% aluminum-silicon sol 700°C calcined material (Al 2 o 3 Content 78%), plus 4% sulfurous acid pulp waste liquid as a binding agent.

[0040] Its process steps are as follows:

[0041] 1) Mixing: Put the raw materials into the mixer according to the above ratio and mix evenly;

[0042] 2) Trapped material: put the above-mentioned homogeneously mixed material in a closed state for 12 hours;

[0043] 3) Molding: weigh the material prepared in step 2 and put it into a mold for molding with a molding pressure of 100Mpa;

[0044] 4) Drying: the molded green body is first dried naturally for 2 days, and then dried at 110°C for 24 hours;

[0045]5) Firing: After drying, heat preservation at 1600°C for 6 hours to obtain setter products.

[0046] The properties of the obtained high temperature creep resistant corundum-mullite setter p...

Embodiment 3

[0050] From 70% particle size 5-0.088mm α-Al 2 o 3 Granular material, 15% fused mullite fine powder with particle size less than 0.088mm, 15% aluminum-silica sol 700°C calcined material (Al 2 o 3 Content 76), plus 4% sulfurous acid pulp waste liquid as a binding agent.

[0051] Its process steps are as follows:

[0052] 1) Mixing: Put the raw materials into the mixer according to the above ratio and mix evenly;

[0053] 2) Trapped material: put the above-mentioned homogeneously mixed material in a closed state for 12 hours;

[0054] 3) Molding: weigh the material prepared in step 2 and put it into a mold for molding with a molding pressure of 150Mpa;

[0055] 4) Drying: the molded green body is first dried naturally for 2 days, and then dried at 110°C for 24 hours;

[0056] 5) Firing: After drying, heat-preserve at 1550°C for 4 hours and fire to obtain setter products.

[0057] The properties of the obtained high temperature creep resistant corundum-mullite setter plate...

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Abstract

The invention belongs to the technical field of ceramic kiln furniture and provides a corundum-mullite load bearing board and a preparation method. The corundum-mullite load bearing board comprises raw material compositions in the following mass percentage: 70 to 85 percent of alpha-Al2O3 particle material with the grain diameter of between 5 and 0.088 mm, 5 to 15 percent of alumina-silica sol fine powder with the grain diameter less than 0.08 mm, 5 to 15 percent of fused mullite fine powder with the grain diameter less than 0.088 mm, and 3 to 5 percent of bonding agent which is externally added. The characteristics of high purity and small particle size of alumina-silica sol are utilized to prepare the high-temperature creep-resistant load bearing board which has high purity and is formed by large-grained mullite bonded with corundum through high-temperature calcination, and the load bearing board does not deform and has good thermal shock resistance when the load bearing board is used at high temperature, and can be taken as the load bearing board used at a temperature higher than 1,650 DEG C in the fields of electronic ceramics and high temperature ceramics.

Description

technical field [0001] The invention belongs to the technical field of preparation of ceramics and refractory materials, in particular to a 2 o 3 The invention relates to a high-temperature corundum-mullite setter plate with mullite formed by reaction as a binding phase and a preparation method thereof. The prepared corundum-mullite setter is suitable for the setter of electronic ceramics, high-temperature ceramics and various high-temperature kilns. Background technique [0002] Corundum-mullite kiln furniture has excellent high-temperature thermal and mechanical properties, and is mainly used for firing products in the fields of electronic ceramics and high-temperature ceramics. Due to the limitation of the purity of the raw material for forming the mullite phase, the corundum-mullite setter plate is easily deformed when used at a temperature greater than 1600 °C. At present, high-temperature kiln furniture with a temperature greater than 1600°C is mainly made of expens...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/10C04B35/622
Inventor 刘鹏周会俊王龙光张立明
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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