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Preparation of potassium hexatitanate whiskers

A potassium hexatitanate whisker and crystalline state technology, applied in the field of materials, can solve problems such as difficulties in large-scale production and difficult control of whisker morphology, and achieve benefits for popularization and application, good whisker quality, and low production costs Effect

Inactive Publication Date: 2004-02-04
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method overcomes the disadvantages of difficulty in controlling the amount of potassium ion dissolution and complicated processes in the multi-step sintering process, the morphology of whiskers is difficult to control, and because the thickness of the thin layer of raw materials must be controlled to be 0.1-0.3 cm, it leads to large-scale production. Difficult to produce; a large amount of acidic waste liquid is produced during whisker defibration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1. Raw material preparation: anatase type industrial metatitanic acid, chemically pure potassium carbonate, of which TiO 2 / K 2 O=6mol, add water to make a suspension with a water content of 50%; 2. Precursor preparation: the raw material suspension is dried by spin flash to make a spherical reaction precursor with a certain structure and composition and a relatively uniform size; 3. Reaction : Put the reaction precursor into the crucible and sinter at 1100°C for 12 hours; 4. Defiberization: Soak the sintered product in 15 times, 50°C deionized water for 10 hours and stir for 10 hours; 5. Filter, wash; 6.150°C Let dry for 2 hours.

[0016] The potassium hexatitanate whiskers obtained in the above process have a diameter of 1-3 um and a length of 30-60 um, with uniform quality and complete structure.

Embodiment 2

[0018] 1. Raw material preparation: anatase type hydrolyzed titanium dioxide, chemically pure potassium carbonate, of which TiO 2 / K 2 O=5mol, add water to make a suspension with a water content of 80%; 2. Precursor preparation: the raw material suspension is spray-dried to make a spherical reaction precursor with a certain structure and composition and a relatively uniform size; 3. Reaction: Put the reaction precursor into a crucible and sinter at 1200°C for 4 hours; 4. Defiberization: soak the sintered product in 10 times, 100°C deionized water for 2 hours and stir to disentangle; 5. Filter, wash; 6. Dry at 150°C for 2 hours Hour.

[0019] The potassium hexatitanate whiskers obtained in the above process have a diameter of 1-3 um and a length of 30-60 um, with uniform quality and complete structure.

Embodiment 3

[0021] 1. Raw material preparation: anatase type industrial metatitanic acid, industrial potassium carbonate, among which TiO 2 / K 2 O=6mol, add water to make a suspension with a water content of 95%; 2. Precursor preparation: the raw material suspension is spray-dried to make a spherical reaction precursor with a certain structure and composition and a relatively uniform size; 3. Reaction: The reaction precursor is pre-pressed and sintered at 1300°C for 0.5 hours; 4. Defiberization: Soak the sintered product in 5 times, 100°C deionized water for 5 hours and stir for 5 hours; 5. Filter, wash; 6. Dry at 150°C 2 hours.

[0022] The potassium hexatitanate whiskers obtained in the above process have a diameter of 1-3 um and a length of 30-60 um, with uniform quality and complete structure.

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Abstract

A process for preparing the crystal whiskers of potassium hexatitanate from titanium compound and potassium compound includes such steps as preparing spherical precursor from the crystal Ti compound and the K compound, sintering, hydrolyzing with deionized water, filtering, washing, and drying. Its advantages are high quality of crystal whisker, low cost and less discharged sewage.

Description

technical field [0001] The invention relates to a method for preparing potassium titanate whiskers, in particular to a method for preparing potassium hexatitanate whiskers, which belongs to the field of materials. Background technique [0002] Potassium titanate whiskers are widely used in the toughening and strengthening of resin-based and ceramic-based composites because of their excellent mechanical and high-temperature physical properties, good chemical stability and process performance, and high performance-price ratio. Heat insulation materials, friction materials, insulation materials and other fields. The sintering method is a method of mixing the raw materials and firing them at a high temperature. Due to the relatively low cost, it is widely used in industry. After literature search, it is found that the Chinese patent number is: 00112275.4, and the name is: manufacturing method of potassium hexatitanate whiskers. , which is characterized in that: the reaction pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/32C30B29/62
Inventor 程存康徐宏胡恒瑶古宏晨吴亚妮
Owner SHANGHAI JIAO TONG UNIV
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