Gel-casting moulding technique for preparing silicon nitride ceramics heating element
A technology of gel injection molding and silicon nitride ceramics, applied in the direction of ceramic molding machines, manufacturing tools, etc., can solve problems such as not being perfect, staying in the laboratory stage, and not being able to be popularized and used, so as to improve production efficiency and production costs The effect of reducing and not easily deforming
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Embodiment 1
[0031] The monomer solution is prepared as follows: the organic monomer used is acrylamide, and the crosslinking agent is N, N-methylenebisacrylamide. Acrylamide: N, N-methylenebisacrylamide is 24:1. After weighing the organic monomer and crosslinking agent according to the weight ratio of 24:1, add deionized water to prepare organic monomer (including organic monomer and cross-linking agent) content of 12% monomer solution, and 2% non-ionic water-soluble polymer solvent polyacrylamide is added to the above monomer solution as an anti-oxidation and anti-coagulation agent. Weigh 50 grams of α-Si 3 N 4 Ceramic powder, α phase > 92%, average particle size 20um, adding 0.5 grams of alumina, 0.5 grams of magnesium oxide and 1.0 grams of yttrium oxide as sintering aids. Add 40ml of the prepared monomer solution to the uniformly mixed solid phase powder, and the volume fraction of the solid phase in the prepared suspension slurry is about 56%. Then add 1.5 ml of dispersant tetrame...
Embodiment 2~ Embodiment 6
[0033] Table 1 shows other five more preferred specific embodiments of the present invention, and its process flow and steps are exactly the same as those in Example 1. See Table 1 for specific material components, proportioning and process parameters.
[0034] Table I
[0035]
[0036]
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