Preparation method for potassium titanate crystal whisker

A potassium titanate whisker and whisker technology, applied in the field of materials, can solve the problems of high manufacturing cost, low thermal stability, complex preparation process of potassium titanate whisker, etc.

Inactive Publication Date: 2008-03-26
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The results showed that potassium tetratitanate (K 2 Ti 4 o 9 ) is less thermally stable than potassium hexatitanate (K 2 Ti 6 o 13 ), K 2 Ti 4 o 9 When calcined at high temperature, the K 2 Ti 6 o 13 transformation, the critical temperature of which is about 1100°C
[0003] The preparation process of the above-mentioned potassium titanate whiskers is relatively complicated, and the manufacturing cost is high, which is not conducive to the mass production of potassium titanate whiskers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0006] The preparation method of potassium titanate whisker of the present invention, step is as follows:

[0007] 1. Put potassium compound and titanium compound according to K 2 O / TiO 2 Molar ratio 1:3~6.0 Weigh and mix thoroughly;

[0008] 2. Mix the mixture in step 1 with the whisker growth accelerator fluoride in a ratio of 100:2 to 10 in parts by mass to obtain a mixture containing fluoride;

[0009] 3. Put the mixture in step 2 into a closed ceramic crucible, calcinate it at a temperature of 900-1150° C., keep it warm for 2-10 hours, and then cool it naturally to obtain a calcined block of the mixture.

[0010] 4. The calcined block of the mixed material in step 3 is pulverized, and ball milled in a ball mill for 1 to 4 hours with water as the medium, and the obtained slurry is washed with water until the clear liquid is nearly neutral. Then dehydrate, dry and sieve to obtain potassium titanate whiskers.

[0011] The ball milling time in the above step 4 can be adju...

Embodiment 1

[0018] 1. Put industrial pure potassium carbonate and anatase titanium dioxide according to K 2 O / TiO 2 Weigh at a molar ratio of 1:3.5 and mix thoroughly;

[0019] 2. Weighing and mixing the mixture in step 1 and the whisker growth promoter potassium fluoride in parts by mass of 100:10 to obtain a mixture containing fluoride;

[0020] 3. Put the mixture in step 2 into a closed ceramic crucible, calcinate it at a temperature of 1050° C., keep it warm for 4 hours, and then cool it naturally to obtain a calcined block of the mixture.

[0021] 4. The calcined block of the mixed material in step 3 is pulverized, and ball milled in a ball mill for 3 hours with water as the medium, and the obtained slurry is washed with water until the clear liquid is nearly neutral. Then dehydrate, dry and sieve to obtain whiskers of potassium tetratitanate, the whiskers have a diameter of 1-3 μm and a length of 10-30 μm.

Embodiment 2

[0023] 1. Put industrial pure potassium chloride and anatase titanium dioxide according to K 2 O / TiO 2 Weigh at a molar ratio of 1:6 and mix thoroughly;

[0024] 2. Weigh and mix the mixture in step 1 and potassium fluoride in parts by mass of 100:8 to obtain a mixture containing fluoride;

[0025] 3. Put the mixture in step 2 into a closed ceramic crucible, calcinate at a temperature of 1100° C., keep it warm for 8 hours, and then cool naturally to obtain a calcined block of the mixture.

[0026] 4. The calcined block of the mixed material in step 3 is pulverized, and ball milled in a ball mill for 4 hours with water as the medium, and the obtained slurry is washed with water until the clear liquid is nearly neutral. Then dehydrate, dry and sieve to obtain potassium hexatitanate whiskers, the whiskers have a diameter of 1-3 μm and a length of 10-30 μm.

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Abstract

The preparation process of potassium titanate crystal whisker belongs to the field of new material technology. The potassium titanate crystal whisker is prepared with technological pure potassium compound and titanium compound powder material and fluoride as the crystal whisker growth promoter, and through high temperature solid phase reaction in a sealed ceramic crucible. The potassium titanate crystal whisker has low cost and excellent performance, and the preparation process is simple and suitable for industrial production.

Description

technical field [0001] The invention relates to a method for preparing potassium titanate whisker material by adopting a solid-phase reaction method, and belongs to the field of material technology. Background technique [0002] Potassium titanate whisker is a new type of needle-like short fiber, which is a new generation of high-performance composite material reinforcement. There are many patents and literature reports on potassium titanate whiskers. CN1093760 (ZL 93111038.6) disclosed the "preparation method of potassium titanate whiskers" on October 19, 1994, using anatase titanium dioxide and potassium chloride, according to the formula of Ti / K molar ratio 2.5-3.8, adding 20 % sodium chloride, mixed, in an electric furnace at 1000-1300°C, heat for 30 minutes to 2 hours, and cool with the furnace; put the burnt product in 10 times of water, soak and crush, filter, remove water, dry to obtain white needles Potassium hexatitanate whiskers. CN1259593 (ZL 99114005.2) discl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/32C30B29/62C30B1/10
Inventor 张玉军龚红宇谭砂砾宋云娜魏红康聂立芳
Owner SHANDONG UNIV
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