Toughened alumina ceramic mobile phone backboard and preparation method thereof

A technology of alumina ceramics and high-purity alumina, which is applied in the field of ceramic materials to achieve the effects of improving fracture toughness, increasing fracture strength, and simple manufacturing process

Active Publication Date: 2018-10-19
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, materials that only rely on phase change toughening are only suitable for use in lower temperature applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take aluminum sulfate (Al 2 (SO4) 3 ), zirconium oxychloride (ZrOCl 2 ·8H 2 O, purity 99.9%), ammonia (NH 4 OH, 28%). Dissolve aluminum sulfate in distilled water and heat to 90°C, cool to 25°C, adjust the pH of the solution to 8, use ammonia water as a precipitant to precipitate, and set the temperature of the obtained precipitate in a drying oven to 80°C and low temperature Dry for 60h. The obtained powder was calcined at 1200° C. for 1 h. Obtain high-purity alumina powder.

[0035] Then dissolve zirconium oxychloride in distilled water at room temperature, stir well and slowly add ammonia water to obtain Zr(OH) 4The precipitate was washed away with distilled water to remove excess chloride ions, and the alumina powder and dispersant PEG6000 obtained above were added to the precipitate, wherein the mass of the dispersant was 9.5% of the mass of the alumina powder. After the mixture was fully mixed, it was suction-filtered with absolute ethanol and then placed ...

Embodiment 2

[0042] Take aluminum sulfate (Al 2 (SO4) 3 ), zirconium oxychloride (ZrOCl 2 ·8H 2 O, purity 99.9%), ammonia (NH 4 OH, 28%). Dissolve aluminum sulfate in distilled water and heat to 90°C, cool to 25°C, adjust the pH of the solution to 9, use ammonia water as a precipitant to precipitate, and set the temperature of the obtained precipitate in a drying oven to 85°C and low temperature Dry for 60h. The obtained powder was calcined at 1200° C. for 1 h. Obtain high-purity alumina powder. Then dissolve zirconium oxychloride in distilled water at room temperature, stir well and slowly add ammonia water to obtain Zr(OH) 4 The precipitate was washed with distilled water to remove excess chloride ions, and the alumina powder and dispersant PEG6000 obtained above were added to the precipitate, wherein the mass of the dispersant was 9.5% of the mass of the alumina powder. After the mixture was fully mixed, it was suction-filtered with absolute ethanol and then placed in an oven fo...

Embodiment 3

[0047] Take aluminum sulfate (Al 2 (SO4) 3 ), zirconium oxychloride (ZrOCl 2 ·8H 2 O, purity 99.9%), ammonia (NH 4 OH, 28%). Dissolve aluminum sulfate in distilled water and heat to 90°C, cool to 25°C, adjust the pH of the solution to 8, use ammonia water as a precipitant to precipitate, and set the temperature of the obtained precipitate in a drying oven to 80°C and low temperature Dry for 60h. The obtained powder was calcined at 1200° C. for 3 h. Obtain high-purity alumina powder. Then dissolve zirconium oxychloride in distilled water at room temperature, stir well and slowly add ammonia water to obtain Zr(OH) 4 The precipitate was washed with distilled water to remove excess chloride ions, and the alumina powder and dispersant PEG6000 obtained above were added to the precipitate, wherein the mass of the dispersant was 9.5% of the mass of the alumina powder. After the mixture was fully mixed, it was suction-filtered with absolute ethanol and then placed in an oven fo...

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PUM

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Abstract

The invention relates to a toughened alumina ceramic mobile phone backboard and a preparation method thereof. The toughened alumina ceramic mobile phone backboard is prepared from the following components: doped toughening component, doped color changing component, graphene and high purity Al2O3; wherein each component accounting for the total mass percentage of materials is as follow: 12 to 25% of doped toughening component, 0.25 to 1% of graphene, 1.25 to 4.25% of doped color changing component, and the balance of high purity Al2O3; wherein, the doped toughening component is ZrO2; the dopedcolor changing component is one, two or three of high purity Fe2O3, high purity CoO , high purity MnO2, high purity NiO. The fracture toughness of the alumina ceramic material can reach 4.75 MPam <1 / 2>, and is 35% higher than that of a conventional Al 2 O 3 based ceramic, and the wave permeability is 80 to 87%.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to a multi-component doped alumina ceramic material, a mobile phone back plate and a preparation method and application thereof. Background technique [0002] At this stage, the mainstream mobile phone backplane materials are glass and zirconia, and metal has been completely abandoned. The mobile phone back panel made of glass has the advantages of low cost, high wave transmission rate, and simple process, but its thermal conductivity at room temperature is very poor, which will have a great impact on the performance of the mobile phone. Zirconia has good performance in terms of hardness and fracture toughness, but its wave transmittance and thermal conductivity are poor, which cannot well meet the requirements of 5G communication mobile phones. With the development of 5G wireless communication technology, signal transmission has entered the era of high frequency, which puts forwar...

Claims

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Application Information

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IPC IPC(8): C04B35/78C04B35/10C04B35/622C04B35/626C04B35/638
CPCC04B35/10C04B35/622C04B35/62605C04B35/638C04B35/78C04B2235/3244C04B2235/425C04B2235/60C04B2235/6567C04B2235/661C04B2235/96
Inventor 陈洪建马旺王佳
Owner HEBEI UNIV OF TECH
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