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Aluminate-metal-aluminum oxide composite material coating and preparation method thereof

A composite material and aluminate technology, which is applied in the field of aluminate-metal-alumina composite material coating and its preparation, can solve the problem of uneconomical energy consumption, difficult to control aluminate/metal ratio, and no composite material has been found yet. and other problems, to achieve the effect of strong broadband light responsiveness

Inactive Publication Date: 2011-06-15
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the methods for synthesizing single-component spinel aluminate crystals include: sol-gel method, solid-phase high-temperature reaction, chemical co-deposition, etc. A common feature of these methods is that the spinel structure can only be obtained at high temperature aluminate crystals, and it is difficult to control the aluminate / metal ratio, the process is also uneconomical in terms of energy consumption
[0004] After searching the prior art, no large-scale synthesis of aluminate-metal-alumina composite with special optical properties has been found at room temperature

Method used

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  • Aluminate-metal-aluminum oxide composite material coating and preparation method thereof

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Embodiment 1

[0025] In the prepared copper aluminate / copper / alumina ternary composite film, the copper aluminate is in the spinel phase, and the copper is in nanoscale crystals. The content of copper aluminate accounts for 36.25%, the content of copper accounts for 18.75%, and the content of alumina accounts for 45.00%.

[0026] The aluminum sheet was annealed in air at 500°C to eliminate internal stress, then the annealed aluminum sheet was immersed in acetone and ultrasonicated at 60 Hz for 10 minutes; then electrochemical surface planing treatment was performed: the surface planed aluminum sheet was placed in Anodic oxidation in dilute phosphoric acid, aluminum sheet as anode, graphite plate as cathode, electrolyte temperature controlled at 19±1°C, anodic oxidation voltage controlled at 15±1V, anodic oxidation time of 15 minutes, that is, a dense layer is formed on the surface of aluminum sheet porous alumina template. Use the alumina template as the working electrode and the graphite ...

Embodiment 2

[0028] In the prepared cobalt aluminate / cobalt / alumina ternary composite film, the cobalt aluminate is in the spinel phase, and the cobalt is in the nanoscale crystal. The content of cobalt aluminate accounts for 41.05%, the content of cobalt accounts for 16.00%, and the content of alumina accounts for 42.95%.

[0029] The aluminum sheet was annealed in air at 500°C to eliminate internal stress, then the annealed aluminum sheet was immersed in acetone and ultrasonicated at 60 Hz for 10 minutes; then electrochemical surface planing treatment was performed: the surface planed aluminum sheet was placed in Anodic oxidation in dilute phosphoric acid, aluminum sheet as anode, graphite plate as cathode, electrolyte temperature controlled at 19±1°C, anodic oxidation voltage controlled at 15±1V, anodic oxidation time of 15 minutes, that is, a dense layer is formed on the surface of aluminum sheet porous alumina template. Using alumina template as working electrode, graphite plate as c...

Embodiment 3

[0031] In the prepared zinc aluminate / zinc / alumina ternary composite film, the zinc aluminate is in the spinel phase, and the zinc is in the nanoscale crystal. The content of zinc aluminate accounts for 33.42%, the content of zinc accounts for 10.58%, and the content of aluminum oxide accounts for 56.00%.

[0032] The aluminum sheet was annealed in air at 500°C to eliminate internal stress, then the annealed aluminum sheet was immersed in acetone and ultrasonicated at 60 Hz for 10 minutes; then electrochemical surface planing treatment was performed: the surface planed aluminum sheet was placed in Anodic oxidation in dilute phosphoric acid, aluminum sheet as anode, graphite plate as cathode, electrolyte temperature controlled at 19±1°C, anodic oxidation voltage controlled at 15±1V, anodic oxidation time of 20 minutes, that is to form a dense layer on the surface of aluminum sheet porous alumina template. Use the alumina template as the working electrode, graphite plate as the...

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Abstract

The invention relates an aluminate-metal-aluminum oxide composite material coating and a preparation method thereof; the preparation method comprises the following steps: placing aluminum sheet in 480-520 DEG C of air environment to perform annealing treatment so as to eliminate internal stress, then performing defatting treatment and electrochemical surface surfacing treatment in turn; then placing the treated aluminum sheet in dilute phosphoric acid to perform anodic oxidation treatment to form a layer of dense order porous aluminum oxide layer on the surface of the aluminum sheet; adoptingthe porous aluminum oxide layer as work electrode and graphite plate as cathode to perform electroplating treatment in electroplate liquid and forming aluminate-metal-aluminum oxide composite material on the surface of the porous aluminum oxide layer. The preparation method to the invention can prepare the composite material which is stable at high temperature and has wideband light responsivity through simple processes.

Description

technical field [0001] The invention relates to a coating in the technical field of composite materials and a preparation method thereof, in particular to an aluminate-metal-alumina composite coating and a preparation method thereof. Background technique [0002] The composition of inorganic materials with broadband photoresponse is often not single, but composed of small-sized metal particles and dielectrics that support these metal particles. The photoresponsiveness of composite materials is mainly determined by the size and distribution of metal particles. In addition, it is also affected by temperature. Because at high temperature, these nanometer-sized metal particles are easily oxidized into oxides, thereby reducing their photoresponse properties. Nanostructured spinel aluminates have the characteristics of high temperature resistance, high mechanical resistance and hydrophobicity, and have been widely used in the fields of ceramic pigments, coatings and catalysts. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/04C25D9/06
Inventor 蔡伟民丁大伟龙明策
Owner SHANGHAI JIAOTONG UNIV