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Method for preparing aluminum borate nanowire

A nanowire and aluminum borate technology, which is applied in the field of preparation of aluminum borate nanowires, can solve the problems of inconsistent product morphology, harsh preparation conditions, and dispersed dimensional distribution, and achieve uniform size distribution, complete product crystal form, and easy operation.

Inactive Publication Date: 2009-11-25
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many defects in these methods: complex equipment, harsh preparation conditions (must be carried out under the protection of inert gas), low yield, inconsistent product morphology (dispersion of dimension distribution)

Method used

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  • Method for preparing aluminum borate nanowire
  • Method for preparing aluminum borate nanowire
  • Method for preparing aluminum borate nanowire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 3.75g Al(NO 3 ) 3 9H 2 O was dissolved in 100ml of distilled water, stirred magnetically for 2 hours to obtain mixed solution A, weighed 1.87g of boric acid and 5.62g of glucose, and stirred in 100ml of distilled water for 1 hour to obtain solution B, slowly added solution B to mixed solution A After mixing evenly, dry at 150°C to obtain light yellow xerogel. The gel was calcined at 750°C for 4 hours to form a white powder, which was washed three times with hot water and dried at 60°C to obtain Al 4 B 2 o 9 Nanowires, Al detected by TEM and XRD 4 B 2 o 9 It is a nanowire with a single crystal structure, the size of the nanowire is uniformly distributed, the diameter is 25nm, and the length is 200-300nm.

Embodiment 2

[0019] Weigh 3.75gAl(NO 3 ) 3 9H 2 Dissolve O in 200ml distilled water, stir magnetically for 24 hours to obtain mixed solution A, weigh 1.25g boric acid and 5.0g sucrose, mix them uniformly in 200ml distilled water for 6 hours to obtain solution B, slowly add solution B to mixed solution A After mixing evenly, evaporate at 120°C for 8 hours to obtain dark brown xerogel. The gel was calcined at 1200°C for 2 hours to form a white powder, which was washed with hot water for 5 times and dried at 100°C to obtain Al 18 B 4 o 33 Nanowires, Al detected by TEM and XRD 18 B 4 o 33 The nanowire is a single crystal structure with a diameter of 50-90 nm and a length of 2-3 μm.

Embodiment 3

[0021] Weigh 2.46g of aluminum sec-butoxide and dissolve it in 100ml of distilled water, stir magnetically for 36 hours to obtain mixed solution A, weigh 1.24g of boric acid and 3.7g of glucose, and magnetically stir in 100ml of distilled water for 1 hour to obtain solution B. Slowly add it dropwise into the mixed solution A, mix well and dry at 100°C to obtain a light yellow xerogel. The gel was calcined at 750°C for 4 hours to form a white powder, which was washed three times with hot water and dried at 60°C to obtain Al 4 B 2 o 9 Nanowires. Al was detected by TEM and XRD 4 B 2 o 9 The nanowire is a single crystal structure with a diameter of about 30nm and a length of 100-200nm.

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Abstract

The invention relates to a method for preparing aluminum borate nanowire which is Al4B2O9 or Al18B4O33 nanowire. The preparation method is implemented according to the following steps of: (1) adding the formula amount of aluminum salt into water for being dissolved sufficiently so that the concentration of aluminum salt solution is 0.01-2.0mol / L, called solution A; (2) adding the formula amount of boric acid and sugar into water for being dissolved sufficiently so that the concentration of boric acid solution is 0.01-2.0mol / L, called solution B; (3) slowly adding the solution B into the solution A for agitation for 2-72 hours, and then drying at 40-300 DEG C to obtain faint yellow xerogel; (4) calcining the xerogel obtained in the step (3) for 2-72 hours at 400-1500 DEG C in an atmosphere of air in order to generate white powder; (5) washing the white powder obtained in the step (4) with hydrochloric acid at first and then with hot water, and drying at 40-200 DEG C to obtain the aluminum borate nanowire. The method is simple in process, easy in operation, high in yield, complete in crystal formation of the product, relatively even in size distribution and high in purity.

Description

(1) Technical field [0001] The invention relates to a method for preparing aluminum borate nanowires. (2) Background technology [0002] Inorganic materials play an important role in the national economy and national defense construction. Aluminum borate whiskers, as a new type of inorganic application materials, have many special functions and are relatively cheap. They have received widespread attention in recent years. Because of its light weight and hardness, it has excellent characteristics in alloy strengthening, which can make the alloy obtain high strength, high hardness, excellent wear resistance, low thermal expansion coefficient, and low cost. As early as 1990, the Japanese developed the method of adding Al to aluminum alloys. 18 B 4 o 33 The method of whiskers to improve the properties of alloys. In addition, aluminum borate whiskers are oxide-type whiskers, which have excellent properties such as high temperature resistance, acid and alkali resistance, chemi...

Claims

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Application Information

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IPC IPC(8): C01B35/12B82B3/00
Inventor 陈爱民倪哲明徐淑芬
Owner ZHEJIANG UNIV OF TECH
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