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Process for preparing aluminium boroxide nano thread

A nanowire, aluminum boron technology, used in boron oxide compounds, chemical instruments and methods, borates, etc., can solve the problems of complex equipment, many impurities, difficult to remove, etc., to achieve excellent performance, simple process, enhanced toughness and the effect of strength

Inactive Publication Date: 2006-05-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But these methods have many disadvantages, such as the amount produced by the thermal evaporation method is less, and requires complicated equipment, and the impurities produced by the catalyst method are more, which are not easy to remove.

Method used

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  • Process for preparing aluminium boroxide nano thread
  • Process for preparing aluminium boroxide nano thread
  • Process for preparing aluminium boroxide nano thread

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Aluminum nitrate (Al(NO 3 ) 3 Analytical purity 99%), boric acid (H 3 BO 3 Analytical purity 99%) and citric acid (C 6 h 8 o 7 ·H 2 (Analytical purity 99%) is made into solution by molar ratio of aluminum nitrate: boric acid: citric acid=1:4:5, dried at 150°C to make a gel; then roasted at 750°C for 4 hours to generate white powder solid; dissolve the white powder in water and centrifuge to remove soluble B 2 o 3 Impurities, aluminum boron oxide (Al 4 B 2 o 9 ) nanowires.

[0022] will dissolve B 2 o 3 Aluminum boron oxide (Al 4 B 2 o 9 ) Nanowires are detected by XRD, the results are shown in figure 1 , the diffraction peaks are sharp, indicating that the nanowires are well crystallized; observed with a transmission electron microscope, the results are shown in figure 2 , indicating that aluminum boron oxide (Al 4 B 2 o 9 ) The diameter of nanowires is relatively uniform, and they are basically single crystals, which belong to the orthorhombic cry...

Embodiment 2

[0024] Aluminum nitrate (Al(NO 3 ) 3 Analytical purity 99%), boric acid (H 3 BO 3 Analytical purity 99%) and citric acid (C 6 h 8 o 7 ·H 2 (Analytical purity 99%) is made into solution by molar ratio of aluminum nitrate: boric acid: citric acid=1:3:5, dried at 150°C to make a gel, then roasted at 1050°C for 4 hours to generate white powder The white powder is dissolved in water, and the soluble B is removed by centrifugation 2 o 3 Impurities, aluminum boron oxide (Al 18 B 4 o 33 ) nanowires.

[0025] will dissolve B 2 o 3 Aluminum boron oxide (Al 18 B 4 o 33 ) Nanowires are detected by XRD, the results are shown in image 3 , Observed with a transmission electron microscope, the results are shown in Figure 4 ; From the results of XRD and transmission electron microscopy, it can be seen that the aluminum boron oxide (Al 18 B 4 o 33 ) The diameter of nanowires is relatively uniform, and they are basically single crystals, which belong to the orthorhombic cr...

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Abstract

The aluminum-boron-oxygen nanowires prepared by the present invention include Al 4 B 2 o 9 and Al 18 B 4 o 33 Two kinds, what adopted is sol-gel method, and step is as follows: 1) with 99% analytically pure aluminum nitrate, boric acid and citric acid, by molar ratio aluminum nitrate: boric acid: citric acid=1: 1: 1~1: Make a solution at a ratio of 10:10, and dry it at 10°C to 150°C to obtain a gel-like product; 2) Roast the gel-like product at 750°C to 1000°C for 4 hours to 200 hours to form a white powder material to obtain Al4B2O9 nanowires; or bake the gel-like product at 1050°C to 2000°C for 4 hours to 200 hours to form a white powder to obtain Al18B4O33 nanowires; 3) dissolve the above-mentioned nanowires in water , centrifuged to remove soluble B 2 o 3 Impurities, that's it. The process of the invention is simple, easy to be mass-produced, and the prepared aluminum-boron-oxygen nano-wire has excellent performance. The organic combination of the prepared aluminum-boron-oxygen nano-wire and other bulk materials is expected to enhance the toughness and strength of the ceramic material.

Description

technical field [0001] The invention relates to a preparation method of aluminum boron oxide nanowires. Background technique [0002] Due to the unique mechanical, electrical, optical, magnetic and other properties of one-dimensional nanomaterials, there is a wide range of industrial application prospects, and it has become a hot spot in recent materials research. One-dimensional nanowires have attracted great attention due to their many unique mechanical properties. Compared with bulk materials, whiskers have greatly enhanced mechanical properties due to fewer defects per unit length. Compared with whiskers, the mechanical properties of one-dimensional nanomaterials are also greatly improved. The mechanical properties of the whiskers of SiC, a commonly used sewing material, are far from the theoretical value. [0003] Aluminum boron oxide (Al 4 B 2 o 9 、Al 18 B 4 o 33 ) is a better ceramic material. Alboron whiskers and SiC whiskers have si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B35/12C01B35/10C01B35/18C04B35/622
Inventor 杨德仁杨青王俊沙健
Owner ZHEJIANG UNIV