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 the problems of long production cycle, high fuel consumption, high production cost, etc., to improve product yield and purity, and improve purity and yield, reducing the effect of the production process

Inactive Publication Date: 2015-06-17
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 preparation method of potassium hexatitanate whisker of the present invention, comprises the steps:

[0029] a. Put -100 mesh titanium-containing raw materials and potassium-containing raw materials according to TiO 2 :K 2 The molar ratio of O=3~6 is mixed evenly;

[0030] b. Sintering the homogeneously mixed material in step a under a temperature environment of 1100-1300° C. for 1-5 hours, so that the material can fully react;

[0031] c. Rapidly cool the sintered material in step b, then fully dissociate the cooled material with water at a constant temperature of 60-80°C, and finally filter and dry to obtain the product potassium hexatitanate whisker.

[0032] The particle size of the raw material of the invention is -100 mesh, so that the bulk volumes of the titanium-containing raw material and the potassium-containing raw material are basically the same, which is conducive to uniform mixing and sufficient contact of the raw materials. Raw material according t...

Embodiment 1

[0040] Put -100 mesh anatase titanium dioxide and anhydrous potassium carbonate according to TiO 2 :K 2 Weigh the molar ratio of O=5.5, and mix the two evenly;

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

[0042] The above-mentioned sintered product is taken out, and immediately put into a water container to cool;

[0043] After the cooling of the product is completed, take the product out of the water, put the product in the crucible into a beaker containing 400ml of water, put the beaker into a water bath set at a temperature of 70°C, and stir the product in the beaker to make the whisker product Full dissociation, the dissociation time is 2h;

[0044] After the above-mentioned dissociated products are suction-filtered, put them in an oven at 90°C and dry them to obtain the finished product.

[0045] See the SEM image (...

Embodiment 2

[0047] Put -100 mesh anatase titanium dioxide and anhydrous potassium carbonate according to TiO 2 :K 2 Weigh the molar ratio of O=5.5, and mix the two evenly;

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

[0049] The above-mentioned sintered product is taken out, and immediately put into a water container to cool;

[0050] After the cooling of the product is completed, take the product out of the water, put the product in the crucible into a beaker containing 400ml of water, put the beaker into a water bath set at a temperature of 70°C, and stir the product in the beaker to make the whisker product Full dissociation, the dissociation time is 2h;

[0051] After the above-mentioned dissociated products are suction-filtered, put them in an oven at 90°C and dry them to obtain the finished product.

[0052] See the SEM figure ...

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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 industry, and in particular relates to a preparation method of potassium hexatitanate whiskers. Background technique [0002] Whiskers (Whiskers) are a kind of fibrous single crystal with nearly uniform cross-section, highly complete internal and external structure, aspect ratio generally above 5-1000, and diameter usually between 200nm-100μm, but the diameter of whiskers with special properties is generally Between 1 and 10 μm. 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 originally synthesized by DuPont in the United States in the 1950s. It was first developed as a heat-resistant and heat-insulating raw material, and it was used in space and mili...

Claims

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Application Information

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Patent Type & Authority Patents(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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