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Method for preparing mullite nanowire

A technology of nanowires and mullite, applied in the field of preparing mullite nanowires, can solve the problems of restricting large-scale industrial production, difficult to control the process, difficult to meet the application, etc., and achieve straight shape, easy process control, and complete surface. Effect

Inactive Publication Date: 2011-09-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The existing methods for preparing one-dimensional nano-mullite materials are mostly in the laboratory research stage due to the toxicity of raw materials, complicated process, and difficult control of the process, which limits its large-scale industrial production and is difficult to meet its application in production and life.

Method used

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  • Method for preparing mullite nanowire
  • Method for preparing mullite nanowire
  • Method for preparing mullite nanowire

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Using 3.11g of anhydrous aluminum sulfate, 0.55g of amorphous silicon dioxide, 0.11g of diboron trioxide, and 6.23g of anhydrous sodium sulfate, mechanically milled with high-purity zirconia balls for 4 hours to obtain uniformly mixed powder. The obtained powder was passed through a 200-mesh sieve, kept at 1050°C for 6 hours, and the sintered powder was cooled to room temperature with the furnace. The obtained product was repeatedly rinsed with water and filtered to remove sodium sulfate in the product until no precipitation occurred after titration with barium nitrate solution. The obtained product was acid-washed with hydrofluoric acid and then dried at 100°C.

Embodiment 2

[0026] Using 3.2 g of anhydrous aluminum sulfate, 0.37 g of amorphous silicon dioxide, 0.02 g of diboron trioxide, and 6.41 g of anhydrous sodium sulfate, mechanically milled with high-purity zirconia balls for 5 hours to obtain uniformly mixed powder. The obtained powder was passed through a 400-mesh sieve, kept at 900°C for 3 hours, and the fused powder was cooled to room temperature with the furnace. The obtained product was repeatedly rinsed with water and filtered to remove sodium sulfate in the product until no precipitation occurred after titration with barium nitrate solution. The obtained product was acid-washed with hydrofluoric acid and then dried at 100°C.

Embodiment 3

[0028] Using 3.15 g of anhydrous aluminum sulfate, 0.42 g of amorphous silicon dioxide, 0.08 g of diboron trioxide, and 6.35 g of anhydrous sodium sulfate, mechanically milled with high-purity zirconia balls for 4 hours to obtain uniformly mixed powder. The obtained powder was passed through a 500-mesh sieve, kept at 950° C. for 4 hours, and the sintered powder was cooled to room temperature with the furnace. The obtained product was repeatedly rinsed with water and filtered to remove sodium sulfate in the product until no precipitation occurred after titration with barium nitrate solution. The obtained product was acid-washed with hydrofluoric acid and then dried at 100°C.

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Abstract

The invention discloses a method for preparing mullite nanowire, comprising the following steps: (1) carrying out ball milling on raw materials to gain uniformly-mixed powder; wherein, the raw materials include 31-32 per cent of anhydrous aluminum sulfate, 3-6 per cent of silicon dioxide, 0.2-1.5 per cent of diboron trioxide and 62-65 per cent of anhydrous sodium sulfate by weight; (2) uniformly heating the powder prepared in the step (1) to 900-1050 DEG C, and keeping warm for 3-6h; (3) cooling the powder to room temperature, washing the powder with water, cleaning the resulting product withacid, and drying by heat. The preparation method has the advantages of low cost of raw materials, simple process and easily-controlled flow. The prepared mullite nanowire has uniform grain size distribution and high dispersion, and the size can meet the requirements of one-dimensional nanomaterials.

Description

technical field [0001] The present invention relates to a method for preparing nanowires, more specifically, relates to a method for preparing mullite nanowires. Background technique [0002] One-dimensional nanostructured materials, including nanotubes, nanorods, nanowires, and nanoribbons, have attracted widespread attention because of their applications in optoelectronic nanodevices, biomaterials, and nanostructured composites. Compared with traditional large-sized whiskers or aggregates, one-dimensional nanomaterials have higher elastic modulus and strength due to their special structure of single crystals. Therefore, one-dimensional nanomaterials are considered to be more effective reinforcement materials. In addition, due to the nano-size effect affecting the band structure of the original wide-bandgap semiconductor, one-dimensional nanomaterials have specific optical and electrical properties. Such as the ability to emit fluorescence in the ultraviolet band at room ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/26C04B35/185B82B3/00
Inventor 刘家臣张鹏宇李莎许睿贾启辉
Owner TIANJIN UNIV
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