Saggar for roller kiln for soft ferromagnet production and preparation method of saggar
A technology of soft magnets and roller kiln, which is applied in applications, household utensils, ceramic products, etc. It can solve the problems of affecting the appearance quality of ferrite soft magnets, circular cracks on the surface, and the inability to continue to use. The preparation method is simple and feasible. , less reaction, easy to achieve effect
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[0025] Example 1
[0026] Weigh 30 parts of 2-1mm sintered mullite, 10 parts of 1-0mm sintered mullite, 15 parts of 1-0mm andalusite, 2.5 parts of 325 mesh kaolin, 19 parts of 325 mesh low sodium alumina, 1500 mesh active oxidation 8 parts of aluminum, 15 parts of 325-mesh aluminum-rich spinel, 0.5 part of zirconia refractory fiber, plus 0.4 part of dextrin and 0.5 part of calcium lignosulfonate, put them in a mud mixer, at 15 rpm speed, stir for 5-10 minutes, add 12 parts of water, stir and mix for 20 minutes, discharge, put it into the raw material bucket, and leave it for 24 hours to trap the material. Use a friction press to form, the pressure is 2-5 tons, and the beating is 10-15 times to form. After the green body is left to dry naturally for 24 hours, it enters the drying room for drying at 110℃×24 hours. Then put the saggar into a high-temperature kiln for firing at 1420℃×4 hours. See the entire process flow figure 1 .
[0027]It can be seen from Table 1 that the ...
Example Embodiment
[0031] Example 2
[0032] Weigh 30 parts of 2-1mm sintered mullite, 10 parts of 1-0mm sintered mullite, 15 parts of 1-0mm andalusite, 2.5 parts of 325 mesh kaolin, 19 parts of 325 mesh low sodium alumina, 1500 mesh active oxidation 8 parts of aluminum, 25 parts of 325-mesh aluminum-rich spinel, 0.5 part of zirconia refractory fiber, plus 0.4 part of dextrin and 0.5 part of calcium lignosulfonate, put into a mud mixer, at 15 rpm speed, stir for 5-10 minutes, add 12 parts of water, stir and mix for 20 minutes, discharge, put it into the raw material bucket, and leave it for 24 hours to trap the material. The raw material is dry due to hydration of the aluminum-rich spinel, and the fluidity is poor. After 1% water is added, it is formed by a friction press, with a pressure of 2-5 tons, and beating for 10-15 times. The green body was allowed to stand for 24 hours, and then entered the drying room for drying at 110°C for 24 hours. Then put the saggar into a high-temperature kiln ...
Example Embodiment
[0036] Example 3
[0037] Weigh 30 parts of 2-1mm sintered mullite, 10 parts of 1-0mm sintered mullite, 15 parts of 1-0mm andalusite, 2.5 parts of 325 mesh kaolin, 12 parts of 325 mesh low sodium alumina, 1500 mesh active oxidation 15 parts of aluminum, 15 parts of 325 mesh aluminum-rich spinel, 0.5 part of zirconia refractory fiber, plus 0.4 part of dextrin and 0.5 part of calcium lignosulfonate; speed, stir for 5-10 minutes, add 12 parts of water, stir and mix for 20 minutes, discharge, put it into the raw material bucket, and leave it for 24 hours to trap the material. Use a friction press to form, the pressure is 2-5 tons, and the beating is 10-15 times to form. The green body was allowed to stand for 24 hours, and then entered the drying room for drying at 110°C for 24 hours. Then put the saggar into a high-temperature kiln for firing at 1420℃×4 hours.
[0038] This example mainly investigates the influence of low-sodium alumina and activated alumina on product perform...
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