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A kind of hollow structure magnesium potassium titanate whisker material and preparation method thereof

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 magnesium potassium titanate, and achieve low production cost, uniform size, The effect of high crystallinity

Inactive Publication Date: 2017-09-22
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 to 2 hours under the same conditions to obtain heat treatment material I; then crush, grind and sieve the heat treatment 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.

[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 ...

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Abstract

The invention relates to a hollow structure magnesium potassium titanate whisker material and a preparation method thereof. The technical plan is: mix titanium-containing raw materials, magnesium-containing raw materials and binders, shape them, grind them after heat treatment, and obtain material A with a particle size of 0.088~1mm and material B with a particle size of less than 0.088mm; The titanium raw material and the binder are mixed, shaped, and ground after heat treatment to obtain material C with a particle size of less than 0.088mm; then, material A, material B, material C and potassium-containing raw material are mixed, and ground after heat treatment to obtain powder and abrasive material; finally Add material C, potassium-containing raw materials and water to the grinding material, stir, press into a green body, dry the green body, wash with water after heat treatment, filter, and dry to obtain a hollow structure magnesium potassium titanate whisker material. The whisker outer diameter of the hollow structure magnesium potassium titanate whisker material prepared by the present invention is 0.1-5 μm, the inner diameter of the whisker is 0.05-1 μm, and the length of the whisker is 3-30 μm. High crystallinity and uniform 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 Patents(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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