Method of preparing functional ceramic part of complex structure by powder injection molding
A technology for powder injection molding and functional ceramics, applied in ceramic molding machines, manufacturing tools, metal processing equipment, etc., can solve the problems of increased powder cost, product performance impact, poor shape retention, etc., to improve product performance and reduce product performance. Quality, the effect of reducing the amount of machining
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[0030] (Example 1)
[0031] When preparing an alumina ceramic product with a product wall thickness of 2mm through powder injection molding, the present invention includes the following steps:
[0032] S1. Feed preparation: uniformly mix the alumina ceramic powder and the binder to form the feed, the volume of the alumina ceramic powder V 1 And binder volume V 2 The ratio is Tap density of alumina ceramic powder ρ 1 1.82g / cm 3 ,Theoretical density of alumina ceramic powder ρ 0 3.96g / cm 3 ; Particle size D of alumina ceramic powder 50 For: 2.3μm;
[0033] S2, injection molding: the feed prepared in step S1 is placed in a powder injection molding machine, and injected into the mold cavity under the conditions of 80-200MPa injection pressure and 160-200°C injection temperature to form an injection blank;
[0034] S3. Degreasing: The injection billet prepared in step S2 is catalytically degreasing to form a catalytic degreasing billet; the catalyst is nitric acid. The specific degreasing ...
Example Embodiment
[0043] (Example 2)
[0044] When preparing an alumina ceramic product with a product wall thickness of 4mm through powder injection molding, the present invention includes the following steps:
[0045] S1. Feed preparation: uniformly mix the alumina ceramic powder and the binder to form the feed, the volume of the alumina ceramic powder V 1 And binder volume V 2 The ratio is The tap density ρ1 of alumina ceramic powder is 1.62g / cm 3 , The theoretical density of alumina ceramic powder ρ0 is 3.96g / cm 3 ; Particle size D of alumina ceramic powder 50 For: 0.62μm;
[0046] S2, injection molding: the feed prepared in step S1 is placed in a powder injection molding machine, and injected into the mold cavity under the conditions of 80-200MPa injection pressure and 160-200°C injection temperature to form an injection blank;
[0047] S3. Degreasing: The injection billet prepared in step S2 is catalytically degreasing to form a catalytic degreasing billet; the catalyst is nitric acid. The specif...
Example Embodiment
[0056] (Example 3)
[0057] When preparing a zirconia ceramic product with a product wall thickness of 3.5 mm through powder injection molding, the present invention includes the following steps:
[0058] S1. Feed preparation: uniformly mix the zirconia ceramic powder and the binder to form the feed, the volume of the zirconia ceramic powder V 1 And binder volume V 2 The ratio is Tap density of zirconia ceramic powder ρ 1 2.89g / cm 3 ,Theoretical density of zirconia ceramic powder ρ 0 6.01g / cm 3 ; Particle size D of zirconia ceramic powder 50 Is: 1.85μm;
[0059] S2, injection molding: the feed prepared in step S1 is placed in a powder injection molding machine, and injected into the mold cavity under the conditions of 80-200MPa injection pressure and 160-200°C injection temperature to form an injection blank;
[0060] S3. Degreasing: The injection billet prepared in step S2 is catalytically degreasing to form a catalytic degreasing billet; the catalyst is nitric acid. The specific deg...
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