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Preparation method of columnar hexagonal potassium titanate

A columnar technology of potassium hexatitanate, which is applied in the field of preparation of columnar potassium hexatitanate, can solve the problems of harsh deionized water boiling conditions, difficulty in separating potassium hexatitanate, and small aspect ratio of potassium hexatitanate. Achieve the effect of low cost, large length-to-diameter ratio, and improved purity

Inactive Publication Date: 2013-01-02
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 1. It can be seen from the content of the patent that the potassium hexatitanate produced by this method has a small aspect ratio and a low yield;
[0006] 2. There are titanium dioxide impurities in the produced potassium hexatitanate, and it is not easy to separate the potassium hexatitanate
The main disadvantages of this method are: 1. The product production cycle is long; 2. The boiling conditions in deionized water are too harsh

Method used

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  • Preparation method of columnar hexagonal potassium titanate
  • Preparation method of columnar hexagonal potassium titanate
  • Preparation method of columnar hexagonal potassium titanate

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preparation example Construction

[0024] The preparation method of columnar potassium hexatitanate of the present invention comprises the following steps:

[0025] a. Put -100 mesh titanium-containing raw materials and potassium-containing raw materials according to TiO 2 :K 2 The molar ratio of O=4~7 is mixed evenly;

[0026] b. Sintering the uniformly mixed material in step a at a temperature of 1100-1300°C for 1-4 hours to fully react the material;

[0027] c. Rapidly cool the sintered material in step b, then fully dissociate the cooled material with water under a constant temperature environment of 60-80°C, and finally filter and dry to obtain the columnar potassium hexatitanate product.

[0028] 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 to TiO...

Embodiment 1

[0036] Mix metatitanic acid (water content 20%) and -100 mesh potassium hydroxide according to TiO 2 :K 2 Weigh the molar ratio of O=5.5, and mix the two evenly;

[0037] 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;

[0038]The above-mentioned sintered product is taken out, and immediately put into a water container to cool;

[0039] 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;

[0040] 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.

[0041] See the SEM figure...

Embodiment 2

[0044] Put -100 mesh anatase titanium dioxide and potassium hydroxide in accordance with TiO 2 :K 2 Weigh the molar ratio of O=5.5, and mix the two evenly;

[0045] 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;

[0046] The above-mentioned sintered product is taken out, and immediately put into a water container to cool;

[0047] 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;

[0048] 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.

[0049] See the SEM image and X...

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Abstract

The invention discloses a preparation method of columnar hexagonal potassium titanate, which belongs to the field of the chemical industry. The method comprises the steps of: a, uniformly mixing a -100 mesh titaniferous containing material and a potassium containing material according to a molar ratio of TiO2:K2O=4-7; b, placing the material mixed uniformly in the step a in an environment at 1100-1300 DEG C for sintering for 1-4 hours for adequate reaction of the material; and c, quickly cooling the sintered material in the step b, then adequately dissociating the cooled material by water at a constant temperature of 60-80 DEG C, and finally filtering and drying to obtain a columnar hexagonal potassium titanate product. The method provided by the invention is simple in process flow, easy to operate, low in cost and high in yield, and the prepared columnar hexagonal potassium titanate is large in draw ratio and high in 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 columnar potassium hexatitanate. Background technique [0002] Potassium titanate whiskers can be expressed as K 2 O nTiO 2 , n can be 2, 4, 6 and 8, representing potassium dititanate, potassium tetratitanate, potassium hexatitanate and potassium octatitanate respectively. In 1994, Professor Huang Jifen introduced in the article "Inorganic Reinforcing Fiber I Potassium Titanate Fiber" published in "Salt Lake Research" (see P69-75): Potassium hexatitanate (K 2 Ti 6 o 13 ), showing a tunnel structure, composed of TiO 6 Octahedrons are connected by coplanarity and common edges to form a crystal with a wind tunnel structure. K ions occupy the wind tunnel, and the wind tunnel axis is parallel to the fiber axis. The K ions in potassium hexatitanate are wrapped in this wind tunnel-like structure to isolate it from the environment. Even in soluti...

Claims

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Application Information

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IPC IPC(8): C01G23/00
Inventor 张树立王本菊刘黔蜀王海波孙青竹罗燕白桂华
Owner PANZHIHUA UNIV
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