Preparation method of spherical ceramic powder for vehicle-mounted copper-clad plate

Abstract

The invention discloses a preparation method of spherical ceramic powder for a vehicle-mounted copper-clad plate. According to the method, angular glass powder with low hardness, low conductivity and low ion content is taken as a raw material, then surface treatment is carried out to enable the angular glass powder to be good in dispersity and fluidity, and then high-temperature spheroidization is carried out to obtain the spherical ceramic powder with small specific surface area, high sphericity degree, few cavities and stable components. Compared with an angular glass powder raw material, the prepared ceramic powder has the advantages that the specific surface area is reduced, the pH is neutral, the conductivity and the ion content are further reduced, when the ceramic powder is applied to vehicle-mounted copper-clad plates and plate processing, the hole wall quality of drilled holes is good, meanwhile, the abrasion of the drilled holes is smaller, and better CAF resistance is achieved.

Description

technical field [0001] The invention belongs to the technical field of preparation of fillers, and relates to a method for preparing spherical ceramic powder for vehicle-mounted copper-clad boards. Background technique [0002] In order to improve the safety and comfort of automobiles, and realize energy conservation and environmental protection, automobiles are becoming increasingly electronic and intelligent. The rapid development of automotive electronics has driven the continuous progress of automotive copper clad laminate substrate technology. Compared with ordinary copper clad laminate base materials, automotive copper clad laminate base materials pay more attention to reliability. Specifically, the performance of the plate is mainly the resistance to conductive anodic filament (CAF), and there are many factors that affect the resistance to CAF. The processability of the plate will not only affect the wear of the drill bit and increase the processing cost, but also af...

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Problems solved by technology

[0004] Chinese patent application CN103360621A discloses a preparation method of an angular glass powder filler, but due to the high conductivity and ion content of the glass powder, it will have a negative impact on CAF, and the processability of the glass powder needs to be improved

[0005] Chinese patent application CN106633648A uses a glass substrate with a pH of 6-7 and a Mohs hardness of 4-5 to prepare a copper-clad laminate ion migration-resistant filler by crushing and surface modification. The filler has problems of high conductivity and ion content. And the processing performance needs to be improved

Due to SiO 2 (70-85%) content is too high, the hardness of the product and SiO 2 closer (SiO 2 Mohs hardness is 6.5-7.0), so the processing performance is also poor when used for copper clad laminates

[0008] Chinese patent CN106242302B prepares high-strength glass microspheres by chemical molten salt strengthening method, but Na in the product 2 O and K 2 O (13-25% Na 2 O, 3-5% K 2 O) is high, and the particle size is also coarse (20 mesh-70 mesh), which cannot be used in copper clad laminates

Although this method can obtain spherical microbeads with a high solid rate, subsequent washing and drying are required, and there is also the problem of high alkali content (18%-22%), which cannot be used in CCL

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