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Spinel film with controllable feature and preparation method thereof

A spinel and thin film technology, applied in the field of spinel thin film and its preparation, can solve the problems of cumbersome post-processing, thin film peeling, expensive raw materials, etc., and achieve the effects of improving efficiency, porous structure, and large specific surface area.

Inactive Publication Date: 2011-09-14
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Under the condition of no addition of surfactants and templates, zinc-aluminum spinel films are synthesized in situ on the surface of aluminum substrates at low temperature in one step, and the control of the surface morphology of the films is realized, which solves the problem of spinel films prepared in the past. Raw materials are expensive, high-temperature calcination, cumbersome post-processing, and the film is easy to fall off from the substrate and other problems

Method used

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  • Spinel film with controllable feature and preparation method thereof
  • Spinel film with controllable feature and preparation method thereof
  • Spinel film with controllable feature and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Pretreatment of the surface of the aluminum sheet: ultrasonically clean the aluminum sheet with ethanol and acetone for 10 minutes to remove impurities and oil on the surface, and then soak it in 1% hydrochloric acid or sodium hydroxide solution to remove the surface oxide layer;

[0027] Weigh 0.5956g of Zn(NO 3 ) 2 And the urea of ​​4.8048g, be dissolved in the mixed solution of the ethanol / water that 80ml equal volume mixes and prepare reaction solution, wherein urea and Zn 2+ The molar ratio is 40:1, where Zn 2+ The molar concentration of urea is 0.025mol / L, and the concentration of urea is 1mol / L.

[0028] Suspend the pretreated aluminum substrate in the reaction solution, place it at 180°C for 24 hours, take out the substrate, wash it with ethanol, and dry it naturally to obtain a spinel film grown in situ on the surface of aluminum and aluminum alloy. The molecular formula of the spinel film is ZnAl 2 o 4 .

[0029] The surface of the obtained film has a gr...

Embodiment 2

[0031] Pretreatment of the surface of the aluminum substrate: Ultrasonic cleaning of the aluminum parts with ethanol and acetone for 10 minutes to remove impurities and oil on the surface, and then soaking in 1% hydrochloric acid or sodium hydroxide solution to remove the surface oxide layer;

[0032] Weigh 1.1912g of Zn(NO 3 ) 2 And the urea of ​​4.8048g, be dissolved in the mixed ethanol / water mixed solution of 80ml equivolume and prepare reaction solution, wherein urea and Zn 2+ The molar ratio is 20:1, where Zn 2+ The molar concentration of urea is 0.05mol / L, and the concentration of urea is 1mol / L.

[0033] Suspend the pretreated aluminum substrate in the reaction solution, and place it at 180° C. for 24 hours. Then take out the aluminum substrate, wash it with ethanol, and dry it naturally to obtain a spinel film grown in situ on the surface of aluminum and aluminum alloy. The molecular formula of the spinel film is ZnAl 2 o 4 .

[0034] The surface of the obtained...

Embodiment 3

[0036] Pretreatment of the surface of the aluminum substrate: Ultrasonic cleaning of the aluminum parts with ethanol and acetone for 10 minutes to remove impurities and oil on the surface, and then soaking in 1% hydrochloric acid or sodium hydroxide solution to remove the surface oxide layer;

[0037] Weigh 1.1912g of Zn(NO 3 ) 2 And the urea of ​​9.6096g, be dissolved in the mixed ethanol / water mixed solution of 80ml equivolume and prepare reaction solution, wherein urea and Zn 2+ The molar ratio is 40:1, where Zn 2+ The molar concentration of urea is 0.05mol / L, and the concentration of urea is 2mol / L.

[0038] Suspend the pretreated aluminum substrate in the reaction solution, and place it at 180° C. for 24 hours. After taking out the aluminum substrate, cleaning it with ethanol, and drying it naturally to obtain a spinel film grown in situ on the surface of aluminum and aluminum alloy, the molecular formula of the spinel film is ZnAl 2 o 4 .

[0039] The surface of th...

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Abstract

The invention relates to a spinel film with controllable feature and a preparation method thereof. The spinel film is prepared by the following steps: adopting an in-situ synthesis technology, directly taking a metal aluminum sheet as a substrate, utilizing aluminum on the surface of the substrate for providing Al3+source needed by the growth of spinel, taking ethanol and water with equal volume ratio as a solvent, taking urea as a alkaline reagent, and controlling the concentration ratio of the urea to divalent metal salt, thus realizing the one-step synthesis of the spline film under low-temperature condition. According to the method, the process is simple, the raw materials can be obtained easily, the cost is low, the repeatability is good, the feature of the film is controllable, and the problems that in the original method for preparing the spinel film, the raw materials are expensive, high-temperature calcination and complex post process are needed, the film is easy to fall from the substrate, and the like are solved.

Description

technical field [0001] The invention relates to a shape-controllable spinel thin film and a preparation method thereof, in particular to an in-situ synthesis technology of a spinel thin film directly grown on an aluminum substrate. technical background [0002] As an important inorganic functional material, spinel-type composite metal oxides, the crystal structure and natural ore-magnesium-aluminum spinel (MgAl 2 o 4 ) similar in structure, are called spinel-type composite metal oxides, the crystal structure of spinel belongs to the cubic crystal system, and its chemical molecular formula can be AB 2 o 4 express. Magnesium aluminum spinel (MgAl 2 o 4 Mg in ) 2+ Can be absorbed by other metal ions such as Mn 2+ 、Ni 2+ , Zn 2+ , Fe 2+ , Li + Etc substitution, Al 3+ Can also be other trivalent metal ions Fe 3+ 、Cr 3+ etc., thus forming spinel-type composite metal oxides with different element compositions. The existence of A-O and B-O strong ionic bonds in the sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/68
Inventor 李峰范国利
Owner BEIJING UNIV OF CHEM TECH
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