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An organic-based ceramic slurry suitable for tape casting

A technology of ceramic slurry and casting process, applied in the field of ceramic slurry, can solve the problems of lack of fluidity and sintering

Active Publication Date: 2018-10-19
KUANG CHI INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In summary, there is a lack of organic-based ceramic slurry suitable for tape casting process with good fluidity and sinterability in this area

Method used

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  • An organic-based ceramic slurry suitable for tape casting

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Embodiment approach

[0107] The contriver surprisingly finds that the mixed dispersant (castor oil, glycerol, and trioleic acid glyceride, its mass ratio is (1~1.2):(0.9~1.1):1) of the specific amount combination of the present invention, specific The combination of mixed solvent (10-16 parts by weight of ethanol, 8-12 parts by weight of butanone;) and specific plasticizer (dibutyl phthalate) can be combined with other components to obtain fluidity and An organic-based ceramic slurry suitable for tape casting with excellent sinterability.

[0108] Preparation

[0109] The present invention provides a kind of preparation method of described ceramic slurry, is characterized in that, comprises the steps:

[0110] Provide the solid phase ceramic material and liquid phase components;

[0111] Wherein the mixed solvent is premixed with the mixed dispersant to obtain a premixed liquid;

[0112] The premixed liquid is mixed with the solid-phase ceramic material, and the premixed slurry is obtained af...

Embodiment 1

[0134] Get 200g fused silica powder (equivalent to 50 parts by weight), add 60g alcohol (15 parts by weight), 40g butanone (10 parts by weight), 2.5g castor oil, 2.1g glycerol and 2.0g triolein (dispersion The sum of the agents is 1.65 parts by weight). After ball milling for 12 hours (one night), 50 g of PVB solution was added, and its concentration was 25 g of PVB (6.25 parts by weight). 100 g of alcohol-butanone mixed solvent was added. After ball milling for 8 hours, 20 g of dibutyl phthalate (5 parts by weight of plasticizer) was added, and the milling was continued for 6 hours, then 2 g of tributyl phosphate was added for defoaming (0.5 parts by weight), and mixed for 4 hours. During casting, it is found that the fluidity of the slurry is good, the thickness of the film (cast sheet) is controllable, and the cast sheet is not easy to be crushed, which is beneficial to subsequent processing.

Embodiment 2

[0136] Take 140g dielectric glass powder (TC-3; Beixu Electronic Glass Co., Ltd.) and 60g (grams) fused silica powder (50 parts by weight); add 55g alcohol (13.75 parts by weight), 35g butanone (8.75 parts by weight), 2.5 g castor oil, 2.2g glycerol and 2g triolein (1.675 parts by weight), ball milled for 10 hours, then added 50gPVB solution (25gPVB / 125g solution) (equivalent to 2.5 parts by weight of binder), ball milled and mixed for 6 hours , then add 20g dibutyl phthalate (5 parts by weight plasticizer), mix for 4 hours, finally add 2g defoamer (0.5 parts by weight), mix for 4 hours, and make a cast sheet of 220 μm after casting , uniform thickness, good flexibility (break resistance) and tensile strength, in line with the general LTCC process requirements.

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Abstract

The invention provides a ceramic slurry composition suitable for a casting technology. The composition comprise a solid ceramic material and a liquid component, the solid ceramic material is 45-55 parts by weight of oxide ceramic base material powder, and the liquid component comprises: a mixed solvent comprising 10-16 parts by weight of alcohol and 8-12 parts by weight of ketone; 1-2 parts by weight of a mixed dispersant, wherein the mixed dispersant is a castor oil, glycerol and glyceryl trioleate mixture with a mass ratio of (1-1.2):(0.9-1.1):1; 2.5-13 parts by weight of a binder; 3-10 parts by weight of a plasticizer, wherein the plasticizer is dibutyl phthalate; and 0.4-1 part by weight of an antifoaming agent. The invention also provides a ceramic slurry obtained through using the composition, and a preparation method thereof. The organic ceramic slurry obtained in the invention has good fluidity and good sintering property, and is suitable for the casting technology.

Description

technical field [0001] The invention relates to a ceramic slurry, in particular to an organic-based ceramic slurry suitable for tape casting. Background technique [0002] Tape casting is a process that can form thin ceramic substrates. The process includes pulping, casting, degreasing and sintering. The casting process includes injecting the slurry into the tank, passing the slurry through the bottom of the scraper, using a PET plastic film to transfer it to a heating zone for drying, and then making a casting sheet. Cast sheet can be used to make multi-layer structure materials, which can have patterns of metal conductor paste in between, so as to realize low temperature co-fired ceramics (LTCC). Needless to say, the degreasing and sintering process is mainly to remove the organic matter in the casting sheet and make the formed ceramic powder densely sintered. [0003] The key step is to prepare ceramic slurry with good fluidity and high concentration. Slurries are div...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/01C04B35/632
Inventor 不公告发明人
Owner KUANG CHI INST OF ADVANCED TECH
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