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Preparation method of flaky potassium hexatitanate

A technology for potassium hexatitanate and potassium magnesium titanate platelets, applied in chemical instruments and methods, titanium compounds, inorganic chemistry, etc., can solve the problems of uneven morphology and poor crystallinity, and achieve easy control and improved purity. And the effect of high quality and yield

Inactive Publication Date: 2012-03-28
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] U.S. Patent US6677041 describes the preparation method of flaky potassium titanate. The average size of the prepared product is 1-100 μm, the thickness is 50-1000 nm, the shape is uneven, the characteristic diffraction peak is not sharp, and the crystallinity is poor.

Method used

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  • Preparation method of flaky potassium hexatitanate
  • Preparation method of flaky potassium hexatitanate
  • Preparation method of flaky potassium hexatitanate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (a) TiO 2 , K 2 CO 3 And Mg(OH) 2 According to the molar ratio K 2 CO 3 : TiO 2 : Mg(OH) 2 =1:3.8:0.8, mix evenly, then add KCl, the mass content is 40%, put the mixture in a ball mill tank, add 200mL alcohol for wet grinding, the ball to material ratio is 1:3, and the ball mill speed is 200r / min , Time 2h, after ball milling and drying, the powder is sintered in a high-temperature furnace to 1050℃, kept for 1h, and then cooled with the furnace.

[0038] (b) The prepared potassium magnesium titanate is crushed, passed through a 20-mesh sieve, washed with boiling water, and filtered with suction. The obtained product was heated to 80°C in a 40% HCl solution and stirred for 3 hours.

[0039] (c) Solid-liquid separation and washing of the acid-treated product. Stir in KOH solution for 12h, adjust pH=12.0.

[0040] (d) Put the above products into the reaction kettle, and hydrothermally react at 200°C for 4 hours.

[0041] (e) After the hydrothermal product is separated by suction...

Embodiment 2

[0043] (a) TiO 2 , K 2 CO 3 And Mg(OH) 2 According to the molar ratio K 2 CO 3 : TiO 2 : Mg(OH) 2 =1:3.8:2.0 ratio is evenly mixed, then KCl is added, the mass content is 50%, the mixture is placed in a ball mill tank, 200mL of alcohol is added for wet grinding, the ball-to-material ratio is 1:3, and the ball mill speed is 200r / min , Time 2h, after ball milling and drying, sinter the powder in a high temperature furnace to 1050℃, keep it for 5h, and cool down with the furnace.

[0044] (b) The prepared potassium magnesium titanate is crushed, passed through a 20-mesh sieve, washed with boiling water, and filtered with suction. The obtained product was heated to 80°C in a 50% HCl solution and stirred for 3 hours.

[0045] (c) Solid-liquid separation and washing of the acid-treated product. Stir in KOH solution for 12h, adjust pH=12.0.

[0046] (d) Put the above products into the reaction kettle, and hydrothermally react at 200°C for 6 hours.

[0047] (e) After the hydrothermal produc...

Embodiment 3

[0049] (a) TiO 2 , K 2 CO 3 And Mg(OH) 2 According to the molar ratio K 2 CO 3 : TiO 2 : Mg(OH) 2 =1:4.8:2.0 ratio and evenly mix, then add KCl, the mass content is 60%, put the mixture in a ball mill tank, add 200mL alcohol for wet grinding, the ball to material ratio is 1:3, and the ball mill speed is 200r / min , Time 2h, after ball milling and drying, the powder is sintered in a high-temperature furnace to 900℃, kept for 8h, and cooled with the furnace.

[0050] (b) The prepared potassium magnesium titanate is crushed, passed through a 20-mesh sieve, washed with boiling water, and filtered with suction. The obtained product was heated to 80°C in a 60% HCl solution and stirred for 3 hours.

[0051] (c) Solid-liquid separation and washing of the acid-treated product. Stir in KOH solution for 12h, adjust pH=12.0.

[0052] (d) Put the above-mentioned product into a reaction kettle, and hydrothermally react at 200°C for 8 hours.

[0053] (e) After the hydrothermal product is separated ...

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Abstract

The invention discloses a preparation method of flaky potassium hexatitanate, belonging to the field of preparation of reinforced materials, frictional materials and heat-resisting materials. The preparation method comprises the following steps of: with potassium magnesium titanate lamellar crystals as a precursor, carrying out acid washing, alkaline washing, hydrothermal treatment, and calciningto generate the potassium magnesium titanate laminar crystals with the average diameter size of 2-3.5 mum and thickness of 100-200nm. The potassium hexatitanate produced by utilizing the preparation method disclosed by the invention has the advantages of small size, good dispersibility, high crystallinity, uniform shapes and benefit to industrial production.

Description

Technical field: [0001] The invention discloses a preparation method of flaky potassium hexatitanate, which belongs to the preparation field of reinforcing materials, friction materials and heat-resistant materials. Background technique: [0002] Potassium titanate whisker is a kind of synthetic fiber material with excellent performance. Its composition is usually K 2 ·NTiO 2 (n=1, 2, 3, 6, 8) means. Among them, potassium hexatitanate (K 2 ·6TiO 2 ) Is a special tunnel-like structure with very stable chemical properties, excellent mechanical properties and unique physical properties. Potassium hexatitanate whiskers have a wide range of applications in reinforced plastics, wear-resistant materials, and heat-resistant materials due to their high strength, high hardness, high modulus, and high heat resistance. With the rapid development of the automobile industry, potassium titanate has attracted widespread attention due to its excellent friction resistance. The new friction materi...

Claims

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Application Information

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IPC IPC(8): C01G23/00
Inventor 宋旎刘咏
Owner CENT SOUTH UNIV
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