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Welding connection method of oxide ceramic and metal

An oxide ceramic and metal welding technology, applied in the field of ceramic and metal welding, can solve the problems of difficult processing cost, the inability to widely produce and apply ceramic back shell mobile phones, etc., and achieve small residual stress, small difference in thermal expansion coefficient, and good toughness. Effect

Inactive Publication Date: 2018-09-18
GUANGDONG UNIV OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

According to reports, mobile phone manufacturers such as Samsung, Huawei, and Xiaomi are working on the application of ceramics in mobile phones, and have produced 3D ceramic back shells. However, due to the cost and difficult processing characteristics, ceramic back shell mobile phones cannot be widely produced and applied. It provides a great application prospect for the sealing technology of ceramics and metals

Method used

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  • Welding connection method of oxide ceramic and metal
  • Welding connection method of oxide ceramic and metal
  • Welding connection method of oxide ceramic and metal

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Embodiment

[0032] The preparation of ceramics is sintered according to the following process: powder preparation—mixing and ball milling—drying and sieving—dry pressing molding—isostatic pressing—normal pressure sintering.

[0033]The specific steps are as follows: Weigh a certain amount of alumina ceramic powder with weighing paper, mix it with absolute ethanol and pour it into the ball milling tank, add a certain amount of zirconia grinding balls, put it on the ball mill for 2 hours, and then filter out the grinding balls, Pour the uniformly mixed ceramic powder solution into an eggplant-shaped bottle, put it into a rotary evaporator to evaporate and dry to obtain a dry ceramic powder, weigh 30g of the mixed ceramic powder, and put it in a 50×50mm stainless steel mold. Dry press molding, and then vacuum packaging for isostatic pressing to further reduce the voids in the green body; put the pressed green body into a muffle furnace for air sintering.

[0034] The temperature setting of t...

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Abstract

The invention discloses a welding connection method of oxide ceramic and metal, using brazing filler metal as an interlayer to connect ceramic and stainless steel metal in a vacuum high temperature environment. The method comprises the following steps: step S1: preparing the ceramic; step S2: making a brazing sample; step S3: performing high-temperature high-vacuum brazing on the sample. The invention relates to the field of connection between different materials, in particular to a connection method of the oxide ceramic and the stainless steel metal, integrating performance advantages of bothceramic and metal in application. Particularly a brazing connection method of aluminum oxide ceramic as well as composite ceramic thereof and the stainless steel metal is disclosed; the used interlayer adopts (Ag72-Cu28)96Ti4 brazing filler metal. The toughness, strength, wear resistance and the like can meet the application requirements in fields such as kitchenware, mobile phone cover plates, auto parts and aviation.

Description

technical field [0001] The invention relates to a method for welding ceramics and metals, in particular to a method for welding and connecting oxide ceramics and metals. Background technique [0002] Alumina ceramics are commonly used structural ceramics, which have the advantages of high hardness, high temperature resistance, corrosion resistance, and wear resistance, but are brittle and insufficient in toughness. By welding ceramics and metals, the advantages of both can be combined, thereby expanding the application range of these two materials. [0003] The connection between metal and ceramics can not only overcome some performance shortcomings of ceramics, but also play a vital role in improving the internal stress distribution of components and reducing production costs. The connection of ceramic materials is easy to obtain various complex structure assemblies, which has a profound impact on ceramic precision devices. Among all kinds of electronic devices, ceramics ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622C04B37/02
CPCC04B35/10C04B35/622C04B37/023C04B2235/6562C04B2235/6567C04B2235/661
Inventor 赵哲伍尚华刘炳耀蒋强国吴士永欧剑华
Owner GUANGDONG UNIV OF TECH
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