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Preparation method of aluminum borate whisker

A technology of aluminum borate whiskers and boric acid, which is applied in the field of preparation of aluminum borate whiskers, can solve problems such as small size of aluminum borate whiskers, uneven distribution of whiskers, and influence on practical application, so as to reduce production costs, broaden industrialization prospects, easy to control effects

Inactive Publication Date: 2015-02-04
JIANGXI FENGZHU NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aluminum borate whiskers prepared by this method are small in size, low in length and diameter, and uneven in whisker distribution, resulting in poor strengthening performance when the whiskers are used as a reinforcing agent, which affects practical applications.

Method used

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  • Preparation method of aluminum borate whisker
  • Preparation method of aluminum borate whisker
  • Preparation method of aluminum borate whisker

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Mix the pretreated alum, boric acid, and potassium sulfate in a molar ratio of 3:1:4, fully mix them by ball milling, put the mixed ingredients into a mold with a diameter of 30mm, adjust the pressure to 30kN, and press the ingredients into tablets. A cylindrical batch with a diameter of 30 mm was produced. Put the prepared cylindrical ingredients into a corundum crucible, place them in a temperature-programmed furnace, raise the temperature to 1100°C at a heating rate of 5°C / min, keep the temperature constant for 4 hours, and cool naturally after the reaction to obtain a sintered block. Soak and stir the agglomerate in hot water at 80°C, the mass ratio of water to agglomerate is 10:1, and filter after 4 hours; soak and stir the obtained filter cake in hot water at 80°C again, and after 1 hour Filtration; the obtained filter cake was immersed in hot water at 80° C. for the third time, stirred, and filtered again after 1 hour. The obtained white filter cake was dried in...

Embodiment 2

[0032] Mix the pretreated alum, boric acid, and potassium sulfate in a molar ratio of 2:1:3, fully mix them by ball milling, put the mixed ingredients into a mold with a diameter of 30mm, adjust the pressure to 60kN, and press the ingredients into tablets. A cylindrical batch with a diameter of 30 mm was produced. Put the prepared cylindrical ingredients into a corundum crucible, place them in a temperature-programmed furnace, raise the temperature to 1200°C at a heating rate of 10°C / min, keep the temperature constant for 2 hours, and cool naturally after the reaction to obtain a sintered block. Soak and stir the sintered block in hot water at 80°C, the mass ratio of water to sintered block is 8:1, filter after 4 hours; soak and stir the obtained filter cake in 1mol / L hydrochloric acid at 80°C again, 1 Filter after 1 hour; the obtained filter cake is soaked and stirred again in hot water at 80° C. for the third time, and then filtered again after 1 hour. The obtained white fi...

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Abstract

The invention relates to a preparation method of aluminum borate whisker, and particularly relates to a preparation method of the aluminum borate whisker. The preparation method of the aluminum borate whisker comprises the following steps of (1) pretreating alumen: calcining the alumen for 2-6 hours at a temperature of 250-350 DEG C, grinding or ball-milling and screening with a 120-mesh sieve; (2) mixing auxiliary materials: mixing pretreated alumen with boric acid and a fluxing agent by fully grinding or ball-milling, wherein a molar ratio of the pretreated alumen to boric acid is (1-4.5):1 and a molar ratio of the pretreated alumen and boric acid to the fluxing agent is 1:(0.5-2); and (3) tabletting the auxiliary materials: putting the mixed auxiliary materials in a mold with a diameter of 10-30 mm, regulating a pressure to 20-80 kN, tabletting the auxiliary materials to obtain a cylindrical auxiliary material; and sintering, leaching and drying the cylindrical auxiliary material to obtain the aluminum borate whisker. The preparation method is simple in process; the produced aluminum borate whisker has excellent qualities; an alum mineral product of alumen and boron resource in Qarhan salt lake are fully utilized; production cost is reduced; and the preparation method has wide industrialization prospects.

Description

technical field [0001] The invention relates to a method for preparing whiskers, in particular to a method for preparing aluminum borate whiskers. Background technique [0002] Aluminum borate whiskers, molecular formula: nAl 2 o 3 mB 2 o 3 , it has many types, but the three common forms are 9Al 2 o 3 2B 2 o 3 , 2Al 2 o 3 ·B 2 o 3 、Al 2 o 3 ·B 2 o 3 . Al 2 o 3 ·B 2 o 3 Exist in natural minerals, 9Al 2 o 3 2B 2 o 3 , 2Al 2 o 3 ·B 2 o 3 It is an artificial product. Since 9Al 2 o 3 2B 2 o 3 Whiskers have excellent properties, industrial whiskers mainly refer to 9Al 2 o 3 2B 2 o 3 . [0003] Aluminum borate whiskers have the properties of light weight, high strength, fire resistance, corrosion resistance, heat insulation and electrical insulation. Its composite materials are widely used in automotive, aerospace, medical, chemical and other fields. beard material. Compared with other whisker materials, it is cost-effective, and its price is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/10C30B29/62C30B9/12
CPCC30B29/10C30B9/12C30B29/62
Inventor 罗新峰黄意漆鸿飞
Owner JIANGXI FENGZHU NEW MATERIAL TECH
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