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
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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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