Powder laying technology and system for ceramic substrate blank body

Abstract

The invention discloses a powder laying technology for a ceramic substrate blank body and further discloses a powder laying system for the ceramic substrate blank body. The powder laying technology comprises the following steps that (1), a uniform adhesion agent film layer is formed on the surface of the ceramic substrate blank body, and a ceramic substrate blank body with the adhesion agent filmlayer is obtained; and (2), an adhesion preventing powder layer is formed on the surface of the ceramic substrate blank body with the adhesion agent film layer, and then a ceramic substrate blank bodysubjected to powder laying is obtained. According to the powder laying technology, an adhesion agent and adhesion preventing powder are implemented independently in two steps, and the situation thatthe adhesion agent forms liquid beads on the surface of the blank body under the effect of tension and thus the adhesion preventing powder is gathered on the surface of the blank body is effectively avoided; the adhesion preventing powder dispersion uniformity and the powder body density uniformity are improved; and meanwhile the adhesion preventing powder which is not laid on the surface of the blank body can be directly recovered for reutilizing, the utilizing rate of the adhesion preventing powder is remarkably increased, and the recovery difficulty of the adhesion preventing powder is reduced. Through the powder laying system, it can be ensured that a powder body on the surface of the ceramic substrate blank body is uniform.

Description

technical field [0001] The invention relates to a preparation process of a ceramic substrate, in particular to a powder application process and system of a ceramic substrate body. Background technique [0002] The existing production process of ceramic substrates for alumina is made through powder grinding→slurry→tape casting→stamping and scoring→powder coating and sintering→correction and releveling→size sorting process. In the powder coating process, first Prepare the adhesive powder slurry, that is, mix the adhesive powder and the prepared adhesive liquid in a certain proportion, form a uniform adhesive powder suspension after stirring and dispersing; then spray the adhesive powder suspension evenly through compressed air atomization The surface of the green body and the alumina ceramic substrate are dried to form a uniform layer of insulating powder. The traditional powder application process is easy to operate and the equipment occupies a small area; in addition, there...

AI Technical Summary

Problems solved by technology

[0003] In the existing powder coating process of the alumina ceramic substrate body, the uniformity of the powder on the surface of the body is poor, and it is difficult to recycle the sticky powder slurry that does not adhere to the surface of the body, and the recycling rate is low; The binder is easily bonded to the wall of the slurry supply pipe, causing the slurry supply pressure to fluctuate, resulting in large fluctuations in the number of powders (and powder density) per unit area

However, in the patent report, the use of humidifying rollers to wet the surface of the green body combined with vibration is difficult to control the speed and uniformity of powder coating, sticky powder sieving, and there is a hidden danger of large fluctuations in powder density on the product surface between sheets.

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