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Composite shell, preparation method and system thereof

A composite shell and shell technology, applied in the field of composite ceramics, to achieve high hardness, improved drop resistance, and good thermal shock resistance

Pending Publication Date: 2019-09-20
SHENZHEN TAOTAO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ceramic materials are brittle materials. How to further improve the fracture toughness index reflecting the anti-drop performance has become an urgent problem to be solved for the expansion of its application range.
At this stage, the primary toughening methods mainly include stress-induced phase transformation toughening, microcrack toughening, bending of microcracks, bifurcation and bridging toughening, whisker toughening, dispersion toughening, fine grain strengthening, and fiber toughening. To improve the fracture toughness of zirconia ceramics, and there are few reports on secondary toughening

Method used

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  • Composite shell, preparation method and system thereof
  • Composite shell, preparation method and system thereof
  • Composite shell, preparation method and system thereof

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Experimental program
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preparation example Construction

[0048] According to the method for preparing a composite shell according to the embodiment of the present invention, by pretreating the ceramic body, on the one hand, the side of the ceramic body to be vacuum-bonded with the glass fiber plate can be properly bonded; on the other hand, The surface of the ceramic body that is in contact with the vacuum bonding device during the subsequent bonding process can be protected from high temperature to avoid damage to the body during the bonding process; after vacuum bonding, the glass fiber plate adheres to the ceramic body , can significantly improve the anti-drop performance and explosion-proof performance of the ceramic body, so that the obtained composite shell not only has high hardness of ceramic materials, good thermal shock resistance, good heat dissipation, high bending strength, good fracture toughness, wear resistance Strong, good corrosion resistance, beautiful appearance, smooth surface, warm and jade-like color, etc., and...

Embodiment 1

[0063] Take a zirconia ceramic flat body with a specification of 156×75×0.45mm, and cut a glass fiber plate with a specification of 156×75×0.5mm for lamination; degrease, clean, dry and dry the ceramic body. Paste a high temperature protective film to obtain the pretreated ceramic body; evenly coat the surface of the pretreated ceramic body (non-film surface) with a 0.3±0.01mm hot melt adhesive layer, and then combine the glass fiber plate with the pretreated ceramic The green body is aligned and placed on the hot melt adhesive layer, and moved to an intelligent vacuum bonding device for curing and compounding. The bonding temperature is 110°C, the pressing time is 180s, and the vacuum degree is -0.095MPa to obtain a composite toughened green body Carry out CNC trimming and drilling of the composite toughened body, and finely grind and polish the ceramic surface and the glass fiber surface of the composite toughened body to obtain a composite shell with a mirror effect on the c...

Embodiment 2

[0067] Take a zirconia ceramic 3D body with an outer size of 152×70mm, an inner size of 149×67mm, a total height of 6.70mm, and a wall thickness of 0.45mm, and cut out a glass fiber profile that matches the inner cavity of the 3D ceramic body. For lamination; degreasing, cleaning, drying and attaching a high temperature protective film to the ceramic body to obtain the pretreated ceramic body; evenly coat the surface of the pretreated ceramic body (non-film surface) with 0.3±0.01mm The hot melt adhesive layer, and then slowly press the glass fiber sheet into the 3D cavity, and move it to the intelligent vacuum bonding device for curing and compounding. The bonding temperature is 110°C, the pressing time is 180s, and the vacuum degree is - 0.095MPa to obtain a composite toughened green body; carry out CNC trimming and drilling of the composite toughened green body, and finely grind and polish the ceramic surface and glass fiber surface of the composite toughened green body to ob...

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Abstract

The invention discloses a composite shell, a preparation method and system thereof. The method includes: (1) pretreating a ceramic green body to obtain a pre-treated ceramic green body; (2) subjecting a glass fiber sheet to vacuum lamination with the pre-treated ceramic green body through a hot melt adhesive to obtain a composite toughened green body; and (3) conducting post-treatment on the composite green body to obtain the composite shell. The method adopts vacuum lamination technology to bond the ceramic green body and the glass fiber sheet into a whole, realizes secondary toughening of the ceramic green body, is simple in process, and has remarkable toughening effect.

Description

technical field [0001] The invention belongs to the field of composite ceramics, in particular, the invention relates to a composite casing and a preparation method and system thereof. Background technique [0002] Ceramic materials have the characteristics of high hardness, good thermal shock resistance, good heat dissipation, high bending strength, good fracture toughness, strong wear resistance, and good corrosion resistance. At the same time, they have beautiful appearance, smooth surface, and warm color like Jade and other "high-value" features are favored by consumers. With the finalization of the 5G communication standard, the shortcomings of the metal shell's significant shielding effect on millimeter waves will be further enlarged, and it will be relatively certain to withdraw from the high-end mobile phone backplane market that was once prosperous, leaving a huge market space. The application competition among 5G mobile phone backplane materials has also entered t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B37/04
CPCC04B37/047C04B2237/343C04B2237/348
Inventor 杨青松吴沙鸥李毅徐信林贺鹏华
Owner SHENZHEN TAOTAO TECH CO LTD