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Hollow structure potassium magnesium titanate whisker material and method for preparing the same

A technology of potassium magnesium titanate and hollow structure, which is applied in the growth of polycrystalline materials, chemical instruments and methods, single crystal growth, etc., can solve the problems that limit the popularization and application of potassium magnesium titanate, and achieve low production costs, wide sources, even size effect

Inactive Publication Date: 2015-09-30
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing preparation methods of potassium magnesium titanate are all in the form of particles, flaky particles or whiskers, which limits the popularization and application of potassium magnesium titanate in the fields of catalysis, heat insulation and heat preservation.
And the current preparation technology has not yet disclosed other forms, especially magnesium potassium titanate whiskers with a hollow structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A hollow structure magnesium potassium titanate whisker material and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0025] The first step is to mix 70~80wt% titanium dioxide, 10~20wt% magnesium hydroxide and 8~10wt% magnesium chloride hexahydrate evenly, press and form under the condition of 50~80MPa, and press in nitrogen atmosphere and 800~1000℃ Heat treatment for 0.5-1 hour under the same conditions to obtain heat-treated material I; then crush, grind and sieve the heat-treated material I to obtain material A with a particle size of 0.088-1 mm and material B with a particle size of less than 0.088 mm.

[0026] In the second step, 20~30wt% of anhydrous potassium carbonate, 60~70wt% of titanium dioxide and 8~10wt% of glucose powder were mixed evenly, and pressed under the condition of 50~80MPa. Heat treatment at ℃ for 1-2 hours, cool naturally to obtain heat-treated material II; then crush, grind, and sie...

Embodiment 2

[0030] A hollow structure magnesium potassium titanate whisker material and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0031] The first step is to mix 80~85wt% metatitanic acid, 10~15wt% magnesium carbonate and 5~8wt% industrial dextrin powder evenly, press and form under the condition of 80~100MPa, in the argon atmosphere and 500~ Heat treatment at 800°C for 1-2 hours to obtain heat-treated material I; then crush, grind, and sieve the heat-treated material I to obtain material A with a particle size of 0.088-1mm and material B with a particle size of less than 0.088mm.

[0032] In the second step, mix 30~40wt% potassium sulfate, 50~60wt% metatitanic acid and 8~10wt% glucose powder evenly, press and form under the condition of 80~100MPa, in nitrogen atmosphere and 800~1000℃ heat treatment for 0.5-1 hour, and natural cooling to obtain heat-treated material II; then crush, grind, and sieve the heat-treated mate...

Embodiment 3

[0036] A hollow structure magnesium potassium titanate whisker material and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0037] The first step is to mix 80~85wt% metatitanic acid, 5~10wt% magnesium sulfate and 8~10wt% glucose powder evenly, and press them under the condition of 50~80MPa, and press them under the condition of argon atmosphere and 500~800℃ Heat treatment for 1-2 hours under the same conditions to obtain heat-treated material I; then crush, grind and sieve the heat-treated material I to obtain A material with a particle size of 0.088-1 mm and B material with a particle size of less than 0.088 mm.

[0038] In the second step, 25~35wt% of potassium chloride, 60~70wt% of metatitanic acid and 5~8wt% of industrial dextrin powder are mixed evenly, and pressed and formed under the condition of 50~80MPa, in an argon atmosphere and 800 Heat treatment at ~1000°C for 1-2 hours, cool naturally to obtain heat-...

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Abstract

The invention relates to a hollow structure potassium magnesium titanate whisker material and a method for preparing the same. The technical scheme is that the method comprises evenly mixing a titanium-containing raw material, a magnesium-containing raw material and a binding agent, performing forming, performing heat treatment and then grinding the mixture to obtain a material A with the particle size of 0.088-1 mm and a material B with the particle size smaller than 0.088 mm; evenly mixing a potassium-containing raw material, a titanium-containing raw material and a binding agent, performing forming, performing heat treatment and then grinding the mixture to obtain a material C with the particle size smaller than 0.088 mm; evenly mixing the material A, the material B, the material C and a potassium-containing raw material, performing heat treatment and then grinding the mixture to obtain a ground material; finally adding the material C, the potassium-containing raw material and water to the ground material, mixing the mixture, pressing the mixture into green bodies, drying the green bodies, performing heat treatment, and then performing washing, filtration and drying to obtain the hollow structure potassium magnesium titanate whisker material. The external diameters of whiskers of the prepared hollow structure potassium magnesium titanate whisker material are 0.1-5 microns, the internal diameters of the whiskers are 0.05-1 micron, and the lengths of the whiskers are 3-30 microns. The hollow structure potassium magnesium titanate whisker material is high in crystallinity and uniform in size.

Description

technical field [0001] The invention belongs to the technical field of magnesium potassium titanate whisker materials. Specifically relates to a hollow structure magnesium potassium titanate whisker material and a preparation method thereof. Background technique [0002] Potassium magnesium titanate is a new type of high-performance inorganic material. Because of its special crystal structure, it has many unique physical and chemical properties. It can be used as friction material, reinforcing material, ion exchange material, catalytic carrier and thermal insulation material. Broad application prospects. Such as "a method for preparing potassium magnesium titanate from carnallite" (ZL200810023312.9) patented technology, which uses carnallite as the main raw material to prepare potassium magnesium titanate platelets and whiskers; "a The method of directly using magnesium oxide to prepare potassium magnesium titanate" (ZL201110161396.4) patent technology, this technology use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B1/10C30B29/32C30B29/62
Inventor 王周福陈美静刘浩王玺堂马妍
Owner WUHAN UNIV OF SCI & TECH
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