MA-MF composite spinel reinforced magnesium oxide based foam ceramic filter and preparation method thereof
A technology of magnesia-based ceramics and foam ceramics, which is applied in the field of metal materials and metallurgy, can solve the problems of reducing sintering temperature of magnesia ceramics, operating restrictions, increasing matrix distortion of magnesia matrix, etc., and achieves lower sintering temperature and good strength , The effect of simple process
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Embodiment 1
[0048] Account for the proportioning of 1% of the ceramic powder quality according to nanometer ferric oxide, be that the nanometer ferric oxide of 30nm and particle diameter are 250 orders (middle diameter d 50 58 μm) light-burned magnesia powder was mixed to prepare ceramic powder; the mass ratio of polyvinyl butyral and hydroxypropyl methylcellulose was mixed to prepare a rheological agent at a ratio of 1:1.
[0049] According to mass percentage, 25% of nano-alumina sol with a solid content of 25% (select a commercial nano-alumina sol with a nearly neutral pH value, the same below), 0.8% of rheological agent, and the rest are ceramic powders for batching. First add the light-burned magnesia powder into the ball mill tank according to the proportioning ratio, and add nano-alumina sol, nano-ferric oxide, rheological agent and an appropriate amount of absolute ethanol (the addition amount is determined according to the solid content of the ceramic slurry, the following Mix wit...
Embodiment 2
[0053] Account for the proportioning of 2% of the ceramic powder quality according to nanometer ferric oxide, be that the nanometer ferric oxide of 60nm and particle diameter are 500 orders (middle diameter d 50 The ceramic powder is prepared by mixing lightly burned magnesia powder with a thickness of 25 μm; the rheological agent is prepared by mixing the mass ratio of polyvinyl butyral and hydroxypropyl methylcellulose at a ratio of 1:1.
[0054] According to mass percentage, 15% of nano-alumina sol with a solid content of 20%, 1.5% of rheological agent, and the rest are ceramic powder for batching. First, add the light-burned magnesia powder into the ball mill tank according to the proportion, mix the nano-aluminum sol, nano-ferric oxide, rheological agent and an appropriate amount of absolute ethanol and ultrasonically treat it for 60 minutes to fully disperse the nano-lanthanum oxide powder Then add it into the ball mill jar, then add corundum balls according to the ratio...
Embodiment 3
[0058]Account for the proportioning of 1.5% of the ceramic powder quality according to nanometer ferric oxide, be that the nanometer ferric oxide of 50nm and particle diameter are 325 orders (medium diameter d 50 The ceramic powder is prepared by mixing light-burned magnesia powder with a thickness of 45 μm; the rheological agent is prepared by mixing the mass ratio of polyvinyl butyral and hydroxyethyl cellulose at a ratio of 1:1.
[0059] According to mass percentage, 20% of nano-alumina sol with a solid content of 22%, 1.0% of rheological agent, and the rest are ceramic powder for batching. First, add the light-burned magnesia powder into the ball mill tank according to the proportion, mix the nano-alumina sol, nano-ferric oxide, rheological agent and an appropriate amount of absolute ethanol and ultrasonically treat it for 45 minutes to fully disperse the nano-lanthanum oxide powder Then add it into the ball mill tank, then add corundum balls according to the ratio of ball...
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