crucible
一种坩埚、粉末的技术，应用在制造用于硅锭生产的坩埚领域，能够解决尚未取得成功等问题，达到改善寿命、高抗弯强度、高热传导率的效果
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example 1
[0061] The mixture was prepared from silicon powder having a particle size of less than 10 microns and a particle size of less than 45 microns (weight ratio 1 : 1 ) together with about 25% by weight of water on solids and an aqueous polymer dispersion binder.
[0062] Flat elements were formed from the mixture and allowed to dry at room temperature for about 24 hours. The necessary dimensions are cut by a high pressure water jet cutter to form elements for the side walls and bottom of the crucible. The components are held together by using the example slurry. The green body is heated to about 600°C for 6 hours, then the temperature is slowly increased to about 1050°C until the pressure in the kiln drops. A nitrogen atmosphere of about 500 mbar was used during the firing process. During the next 4 days, the temperature was slowly increased to 1250°C during further heating, and finally, up to 1400°C. The crucible was then maintained at a temperature of 1400°C for the remainin...
example 2
[0064] Metal silicon powder with a particle size of less than 45 microns is mixed with 20% by weight of SiC powder with a particle size of less than 100 microns and a particle size of less than 10 microns (weight ratio 1:3). Water was added at 25% solids weight and the mixture was filled into molds, which were the outer surface of the crucible. The inner surface is formed by pressing a plunger into the material. After drying at room temperature for 30 minutes, the green body can be removed from the mold and plunger and fired according to the conditions of Example 1.
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