| What is the method of forming a corundum crucible? |
| [ Publish: 2018-11-27 ] |
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Alumina crucible is known as corundum crucible. Corundum crucible has the characteristics of high temperature resistance, rapid cooling heat collection and chemical corrosion, but it has no way of resisting acid and alkali. A corundum crucible is actually a cylindrical pot, like a small barrel. For all its virtues, corundum crucibles contain aluminum, which can cause alzheimer's. Corundum crucible forming is a variety of methods, today small make up to take you to understand what corundum crucible forming methods? (1) dry pressure method Due to the hydraulic press stroke pressure is uniform, so there is no difference in the height of pressure components when the powder filling is different. Powder particles with more than 60 microns, between 60 and 200 mesh between the maximum free movement, the loss of the best pressure molding effect. The press has hydraulic pressure type, machine type two kinds, may present the semi-active or the full active molding method. Iron oxide ceramics dry pressed silicon carbide furnace tube technology is limited to the appearance of pure and thin thickness of the inner wall over a millimeter, the length and diameter of the ratio of no more than four to one articles. Forming methods are uniaxial or bidirectional. The maximum pressure of the press is 200 mpa. However, the size of the pressure imposed by the mechanical press is changed by the amount of powder filling, which is easy to lead to the difference in the extension of sintering scale and reflect the quality of goods. The accuracy of the sagger's filling quantity has a great influence on the scale precision of the sagger. What is the method of forming a corundum crucible? Therefore, the uniform dispersion of powder particles during the dry pressing process is extremely important for last filling. It can be worth fifteen to fifty pieces per second. Corundum crucible (2)The grouting method Hollow grouting, is the mold wall adsorption slurry up to the requirements of thin thickness, surplus slurry should be poured out. In order to increase the elongation of the billet, the esoteric slurry should be used excessively. Grouting is the earliest molding method of iron oxide ceramics. Generally, water is used as the flux medium, and then the sagger of gangyumulaishi is added as the sagger and the binder, and the current exhaust gas is fully ground, and then poured into the plaster plaster mold. Due to the adoption of gypsum clinker mold, low profit and easy to form large scale, shape just jade crucible mixed elements. The key that grouting forms is the preparation of iron oxide slurry. As saggar sagger capillary adsorbed moisture, the slurry solidified in the mold. The above two corundum crucible forming methods are actually grouting forming methods used at the very beginning. The cost of this method is relatively low, but the most important thing is the preparation of the material itself, so this point should be noted. |
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