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A large amount of non-destructive bending alumina ceramic foil and its preparation method

A technology of alumina ceramics and alumina, applied in anodizing, coating, surface reaction electrolytic coating, etc., can solve the problem of not being able to deform substantially without damage, and achieve the effect of eliminating the cumbersome process

Inactive Publication Date: 2018-09-21
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an alumina ceramic foil that can be bent largely without damage and a preparation method thereof, to solve the problem in the prior art that alumina ceramics cannot be deformed largely without damage in special service environments such as flexible circuits

Method used

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  • A large amount of non-destructive bending alumina ceramic foil and its preparation method
  • A large amount of non-destructive bending alumina ceramic foil and its preparation method
  • A large amount of non-destructive bending alumina ceramic foil and its preparation method

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Embodiment 1

[0029] Embodiment 1 of the present invention provides an alumina ceramic foil with a thickness of about 80 μm, a length and a width of 10 cm, and a large-scale non-destructive bending and a preparation method thereof, which are implemented according to the following steps:

[0030] Step 1. Pretreatment and clamping of aluminum foil

[0031] Firstly, the No. 1060 aluminum foil with a length and width of 10 cm and a thickness of 40 μm was used as the precursor, and it was firmly connected to the positive electrode of the power supply. At the same time, the edge of the aluminum foil was fixed to prevent the sample from moving during the micro-arc oxidation process; the aluminum foil and The distance between the stainless steel cathode is about 20cm, and the area ratio to the cathode is 1.0. The micro-arc oxidation electrolyte uses an aqueous solution containing 25-30g / L sodium silicate, 15-20g / L sodium hexametaphosphate and 3g / L sodium hydroxide, and the conductivity is 35000-400...

Embodiment 2

[0036] Embodiment 2 of the present invention provides a small-sized alumina ceramic foil with a thickness of about 100 μm, a length and a width of 3 cm and 2 cm, and a preparation method thereof, which are implemented according to the following steps:

[0037] Step 1. Pretreatment and clamping of aluminum foil

[0038] Cut the 8011 aluminum foil with a thickness of about 50 μm into a small size sample of 3cm×2cm, connect it to the positive electrode of the power supply and place it in the micro-arc oxidation electrolyte; the distance between the sample and the stainless steel cathode is 10cm, and the area ratio of the cathode to the cathode is 0.5. The micro-arc oxidation electrolyte uses a silicate solution, which contains 45g / L sodium silicate, 3g / L sodium tungstate, and 4g / L ammonium metavanadate. The conductivity of the solution is about 30000μS / cm, and the pH value is 12.0 , The electrolyte temperature is lower than 40°C during the micro-arc oxidation process.

[0039] S...

Embodiment 3

[0042] Embodiment 3 of the present invention provides an alumina ceramic foil with a thickness of about 130 μm, a length and a width of 20 cm, and a large amount of non-destructive bending and a preparation method thereof, which is implemented according to the following steps:

[0043] Step 1. Pretreatment and clamping of aluminum foil

[0044] 1100 aluminum foil with a length and width of 20 cm and a thickness of about 80 μm was used as the precursor, which was fixed on a special insulating frame and connected to the positive electrode of the power supply; the distance between the aluminum foil and the stainless steel cathode was 20 cm, and the area ratio to the cathode was 0.5. The micro-arc oxidation electrolyte uses an aqueous solution containing 25-30g / L sodium silicate, 15-20g / L trisodium phosphate, 4g / L sodium molybdate and 3g / L sodium hydroxide, and the conductivity is 20000-24000μS / cm , the pH value is 12, and the electrolyte temperature is lower than 40°C during the ...

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Abstract

The invention discloses an alumina ceramic foil that can be bent without damage and a preparation method thereof. The thickness of the aluminum ceramic foil is 80-150 μm, and the total thickness of the alumina microlayer is 60%-70% of the thickness of the alumina ceramic foil. In the present invention, the aluminum foil material is used as the precursor, and the micro-arc oxidation method is used to prepare an aluminum oxide foil material with a volume resistivity greater than 1012 Ω cm and capable of large-scale non-destructive bending deformation, which can provide a new type of ceramic substrate material for flexible circuits .

Description

technical field [0001] The invention relates to the field of ceramic materials, and more specifically relates to an alumina ceramic foil capable of large and non-destructive bending and a preparation method thereof. Background technique [0002] Alumina ceramics are widely used because of their high hardness, high strength, corrosion resistance, wear resistance, oxidation resistance, electrical insulation and light weight. They are especially used as integrated circuit substrates or high-frequency insulating materials in the electronics industry. However, as a typical brittle material, it is difficult for alumina ceramics to undergo large-scale non-damage deformation during stretching or bending, and usually breaks without forming obvious elastic or plastic deformation. [0003] At present, with the rapid development of new functional devices such as smart wearables, the use of flexible circuits is also increasing. In addition to the need for electrical insulation, the subs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/04
CPCC25D11/026C25D11/04
Inventor 蔡辉徐苗麻凤娇郭倩
Owner XIAN UNIV OF SCI & TECH