Potassium hexatitanate whisker and its prepn process

A potassium hexatitanate whisker and whisker technology, applied in the field of materials, can solve the problems of high risk and high pressure, and achieve the effect of good shape, good quality and large aspect ratio

Inactive Publication Date: 2007-06-06
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pressure of this method is as high as 14-45MPa, which is very dangerous.

Method used

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  • Potassium hexatitanate whisker and its prepn process
  • Potassium hexatitanate whisker and its prepn process
  • Potassium hexatitanate whisker and its prepn process

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 1. Raw material preparation: industrial anatase titanium dioxide (TiO 2 ), analytically pure potassium hydroxide (KOH) as raw material, wherein K 2 O:TiO 2 =2: 1 molar ratio, 2. Loading: mix the prepared materials evenly, put into a stirred reactor, add distilled water, adjust the weight percentage concentration of KOH to be 10%, then tighten and seal the reactor; 3. Reaction: Heat the reactor, and raise the temperature of the reactor at a heating rate of 3°C / min, so that the temperature rises to 320°C, while stirring at a speed of 100r / min, and keep at 320°C for 2h; 4. Product treatment: After the above After the reaction product was separated from solid and liquid by filtration, it was washed with distilled water to pH ≈ 7.2, then ultrasonically dispersed for 5 minutes, and dried in an oven at 80°C for 4 hours to obtain potassium hexatitanate whiskers.

[0031] K obtained above 2 Ti 6 o 13 The whiskers have a diameter of about 200nm, a length of about 20um, an as...

Embodiment 2

[0033] 1. Raw material preparation: industrial rutile TiO 2 , Analytical pure KOH is the raw material, where K 2 O:TiO 2 =5:1 molar ratio, 2. Loading: Mix the prepared materials evenly, put them into a stirred reactor, add distilled water, adjust the weight percentage concentration of KOH to be 53%, tighten and seal the reactor; 3. Reaction : Heating the reaction kettle, and heating the reaction kettle at a heating rate of 3°C / min, so that the temperature rises to 250°C, while stirring, the rotating speed is 300r / min, and kept at 250°C for 5h; 4. Product treatment: After the above After the reaction product was separated from solid and liquid by filtration, it was washed with distilled water to pH ≈ 7.3, dispersed by ultrasound for 15 minutes, and dried in an oven at 120°C for 2 hours to obtain potassium hexatitanate whiskers.

[0034] K obtained above 2 Ti 6 o 13 The whiskers have a diameter of about 200nm, a length of about 20-30um, an aspect ratio of 100, and a yield of ...

Embodiment 3

[0036] 1. Raw material preparation: industrial anatase TiO 2 , analytically pure KOH is the raw material, where K 2 O:TiO 2 =7:1 molar ratio, 2. Loading: Mix the prepared materials evenly, put them into a stirred reactor, add distilled water, adjust the weight percentage concentration of KOH to be 13%; tighten and seal the reactor, 3. Reaction : Heating the reaction kettle, and heating the reaction kettle at a heating rate of 3°C / min, so that the temperature is 300°C, and at the same time, stirring is started, and the rotation speed is 350r / min, and the temperature is kept at 300°C for 6h; 4. Product treatment: The product obtained through the above reaction was filtered for solid-liquid separation, washed with distilled water to pH ≈ 7.5, dispersed by ultrasound for 10 minutes, and dried in an oven at 100°C for 3 hours to obtain potassium hexatitanate whiskers.

[0037] K obtained above 2 Ti 6 o 13 The whiskers have a diameter of about 500nm, a length of about 20um, an a...

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Abstract

The present invention relates to potassium hexatitanate whisker and its hydrothermal preparation process, and belongs to the field of material technology. The potassium hexatitanate (K2Ti6O13) whisker has diameter of 200-500 nm and length of 20000-30000 nm. It is prepared with titanium compound and potassium compound with the corresponding K2O/TiO2 molar ratio of 2-20, and through the technological steps of reaction, solid-liquid separation, washing, ultrasonic dispersion, drying, etc. The preparation process of the present invention has mild reaction condition, great operation flexibility, simple course and easy control, and the synthesized potassium hexatitanate whisker has high dispersion, homogeneous diameter, great length/diameter ratio and whisker yield over 83 %.

Description

technical field [0001] The invention relates to a potassium titanate whisker and a preparation method thereof, in particular to a potassium hexatitanate whisker and a method for preparing the potassium hexatitanate whisker by a hydrothermal method, belonging to the field of materials. Background technique [0002] Potassium titanate whiskers are a family of synthetic fiber materials with excellent properties, and their composition is usually expressed in K 2 O nTiO 2 (n=1, 2, 4, 6, 8) represent. Among them, potassium hexatitanate (K 2 O·6TiO 2 ) is a chain tunnel structure with very stable chemical properties, excellent mechanical and physical properties, excellent wear resistance, corrosion resistance and heat resistance and heat insulation properties. Therefore, potassium hexatitanate whiskers are widely used in automobile brake pads, insulation Heat and various composite reinforcements and other materials. [0003] The preparation methods of potassium hexatitanate wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/32C30B29/62C30B7/10
Inventor 梁斌李春王菊
Owner SICHUAN UNIV
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