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Method for preparing potassium hexatitanate whisker

A potassium hexatitanate whisker and purpose technology, which is applied in the field of preparation of potassium hexatitanate whisker, can solve problems such as long production cycle, high fuel consumption, complex process flow, etc., to improve product yield and purity, improve Purity and yield, the effect of simple process flow

Inactive Publication Date: 2012-12-26
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: 1. The process steps are complicated, which is not conducive to industrial production; 2. The product production cycle is long; 3. Recrystallization conversion is required, the fuel consumption is high, and the production cost is too high; 4. During the recrystallization sintering process, there will be The agglomeration phenomenon requires a special crushing process, and then sieving and grading. Such mechanical crushing will inevitably lead to the breakage of some whiskers, which affects the uniformity of potassium titanate whiskers.
Repeated washing with deionized water at 5.1~4℃, the conditions are relatively harsh, and it is difficult to achieve in Panzhihua area
This process has the following disadvantages: the production cycle is long; the preparation of the precursor is more complicated, and the production process is more complicated
This method mainly has the following disadvantages: the technological process is complicated, difficult to operate, and unfavorable for industrialized production

Method used

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  • Method for preparing potassium hexatitanate whisker
  • Method for preparing potassium hexatitanate whisker
  • Method for preparing potassium hexatitanate whisker

Examples

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preparation example Construction

[0028] The method for preparing potassium hexatitanate whiskers of the present invention includes the following steps:

[0029] a. The -100 mesh titanium-containing raw material and potassium-containing raw material are in accordance with TiO 2 : K 2 O=3~6 molar ratio and mix well;

[0030] b. Place the uniformly mixed materials in step a for sintering in a temperature environment of 1100 to 1300°C for 1 to 5 hours to fully react the materials;

[0031] c. The sintered material in step b is rapidly cooled, and then the cooled material is fully dissociated with water in a constant temperature environment of 60-80°C, and finally filtered and dried to obtain the product potassium hexatitanate whiskers.

[0032] The particle size of the raw material of the invention is -100 mesh, so that the loose volume of the titanium-containing raw material and the potassium-containing raw material is basically the same, which is beneficial to uniform mixing and sufficient contact of the raw materials. ...

Embodiment 1

[0040] -100 mesh anatase titanium dioxide and anhydrous potassium carbonate are 2 : K 2 Weigh with a molar ratio of O=5.5 and mix the two evenly;

[0041] Put the above mixed raw materials into a crucible of appropriate size, and put the crucible into a high temperature box-type resistance furnace at 1150℃ for 3 hours;

[0042] Take out the above sintered product and immediately put it into a water container to cool;

[0043] After the product has cooled down, take the product out of the water, put the product in the crucible into a beaker containing 400ml of water, and put the beaker into a water bath set at a temperature of 70℃, and stir the product in the beaker to make a whisker product Fully dissociated, the dissociation time is 2h;

[0044] After the above-mentioned dissociated product is suction filtered, it is put into an oven at 90°C and dried to be the finished product.

[0045] See the SEM image of the prepared potassium hexatitanate whiskers ( figure 1 ), the length of the ...

Embodiment 2

[0047] -100 mesh anatase titanium dioxide and anhydrous potassium carbonate are 2 : K 2 Weigh with a molar ratio of O=5.5 and mix the two evenly;

[0048] Put the above mixed raw materials into a crucible of appropriate size, and put the crucible into a high temperature box-type resistance furnace at 1200°C for 3 hours;

[0049] Take out the above sintered product and immediately put it into a water container to cool;

[0050] After the product has cooled down, take the product out of the water, put the product in the crucible into a beaker containing 400ml of water, and put the beaker into a water bath set at a temperature of 70℃, and stir the product in the beaker to make a whisker product Fully dissociated, the dissociation time is 2h;

[0051] After the above-mentioned dissociated product is suction filtered, it is put into an oven at 90°C and dried to be the finished product.

[0052] See the SEM image and XRD image of the prepared potassium hexatitanate whiskers ( figure 2 with ...

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Abstract

The invention discloses a method for preparing a potassium hexatitanate whisker, belonging to the field of chemical industry. The method comprises the following steps of: a, uniformly mixing 100-mesh titanium-containing raw material and potassium-containing raw material according to mole rate of TiO2 to K2O being 3-6; b, placing the materials in an environment at temperature of 1100-1300 DEG C and sintering for 1-5 hours to make the materials fully reacted; and c, rapidly cooling the sintered materials, fully dissociating in an environment at constant temperature of 60-80 DEG C by using water, filtering, drying, and thus obtaining the potassium hexatitanate whisker. The process flow is simple, production period is short, yield is high, meanwhile, a production process of a precursor or a post-period recrystallization conversion process in the prior art is reduced, energy consumption is saved, and production cost is reduced. The cooled materials are fully dissociated in the environment at constant temperature of 60-80 DEG C by using the water, so that the potassium hexatitanate whisker has good purity and is suitable for industrial production.

Description

Technical field [0001] The invention belongs to the field of chemical engineering, and specifically relates to a method for preparing potassium hexatitanate whiskers. Background technique [0002] Whiskers are fibrous single crystals with almost uniform cross-sections, high internal and external structures, length-to-diameter ratios generally above 5~1000, diameters usually between 200nm~100μm, but whiskers with special properties are generally in diameter Between 1~10μm. Potassium titanate whiskers, also called potassium titanate fibers, are white needle-like crystals with a density of 3.2g / cm 3 , Has excellent heat resistance, chemical stability and chemical resistance, and has high surface strength (> 700kg / mm 2 ) And high elastic modulus (> 2800kg / mm 2 ). It was first synthesized by DuPont of the United States in the 1950s. It was first developed as a raw material for heat and heat insulation and used in space and military applications. At present, potassium titanate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/32C30B29/62C30B1/10
Inventor 张树立王本菊刘黔蜀罗燕白桂华袁波王亚军
Owner PANZHIHUA UNIV
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