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Preparation method of titanium boride ceramic powder based on ferrosilicon-titanium alloy

A technology of titanium silicon ferrosilicon alloy and ceramic powder, which is applied in the field of preparation of titanium boride ceramic powder, which can solve the problems of high impurity content in the product powder that is difficult to remove, production efficiency and cost unfavorable for industrialization, and difficulty in controlling the size of ceramic powder. , to achieve the effects of narrow particle size distribution, widening the source of raw materials, and improving kinetic conditions

Inactive Publication Date: 2019-01-22
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there are high-energy ball milling alloying methods, molten electrolysis methods, sol-gel methods, and vapor deposition methods, etc., but they are all in the experimental research stage, and their production efficiency and cost are not conducive to industrialization.
[0004] Based on the above analysis, the existing TiB 2 There are different degrees of problems in the synthesis method of ceramic powder, such as high cost of raw materials, high reaction temperature, synthetic TiB 2 The size of ceramic powder is difficult to control, the activity is low, the impurity content of the product powder is high and it is difficult to remove, and the subsequent acid treatment purification process is seriously polluted by the environment, etc.

Method used

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  • Preparation method of titanium boride ceramic powder based on ferrosilicon-titanium alloy
  • Preparation method of titanium boride ceramic powder based on ferrosilicon-titanium alloy
  • Preparation method of titanium boride ceramic powder based on ferrosilicon-titanium alloy

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Experimental program
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preparation example Construction

[0026] The preparation method of the titanium ferrosilicon alloy is as follows: the titanium-containing blast furnace slag is cold or hot titanium-containing blast furnace slag produced by blast furnace smelting with vanadium-titanium magnetite as the main raw material; 2 The content is 12-30wt%.

[0027] The particle size of the titanium-silicon-iron alloy is ≤0.088mm.

[0028] The titanium-containing blast furnace slag is cold or hot titanium-containing blast furnace slag produced by blast furnace smelting with vanadium-titanium magnetite as the main raw material; 2 The content is 12-30wt%.

[0029] SiO in the sodium silicate 2 with Na 2 The molar ratio of O is ≤1.

Embodiment 1

[0031] A method for preparing titanium boride ceramic powder based on titanium silicon ferroalloy. The preparation method described in this embodiment is:

[0032] According to the mass ratio of titano-silicon alloy: boron source: the molten salt of alkali metal compound is 1.0: (0.5~1.0): (0.2~5.0), the described titano-silicon alloy, the boron source and the alkali metal compound The molten salt is mixed evenly, heat treated in a protective atmosphere at 1000-1300°C for 6-8 hours, then dissolved in water at 95-200°C, washed, sorted, and dried to prepare titanium boride ceramics based on titanium-silicon-iron alloy Powder.

[0033] The boron source is one of boron gangue, boric acid, sodium tetraborate, potassium tetraborate and lithium tetraborate.

[0034] The molten salt containing alkali metal compound is one of lithium chloride, sodium chloride, potassium chloride, lithium fluoride, sodium fluoride, potassium fluoride, sodium hydroxide, sodium silicate and sodium carbo...

Embodiment 2

[0036] A method for preparing titanium boride ceramic powder based on titanium silicon ferroalloy. The preparation method described in this embodiment is:

[0037] According to the mass ratio of titano-silicon alloy: boron source: the molten salt of alkali metal compound is 1.0: (0.5~1.0): (0.2~5.0), the described titano-silicon alloy, the boron source and the alkali metal compound The molten salt is mixed evenly, heat-treated in a protective atmosphere at 1000-1300°C for 6-8 hours, then dissolved with an alkali solution at 95-200°C, washed, sorted, and dried to obtain boride based on titanium-silicon-iron alloy Titanium ceramic powder.

[0038] The boron source is a mixture of boron gangue, boric acid, sodium tetraborate, potassium tetraborate and lithium tetraborate.

[0039] The molten salt containing alkali metal compound is a mixture of two substances in lithium chloride, sodium chloride, potassium chloride, lithium fluoride, sodium fluoride, potassium fluoride, sodium ...

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Abstract

The invention relates to a preparation method of titanium boride ceramic powder based on a ferrosilicon-titanium alloy. The preparation method comprises the steps: mixing the ferrosilicon-titanium alloy, a boron source and a molten salt containing an alkali metal compound uniformly according to the mass ratio of the ferrosilicon-titanium alloy to the boron source to the molten salt containing thealkali metal compound of 1.0:(0.5-2.5):(0.2-20.0), carrying out heat treatment for 0.5-8 h under conditions of a protective atmosphere and the temperature of 600-1300 DEG C, dissolving in water or analkali solution under a condition of room temperature-250 DEG C, washing, sorting and drying, to prepare the titanium boride ceramic powder based on the ferrosilicon-titanium alloy. The preparation method has the advantages of low reaction temperature, simple process, low production cost, environmental friendliness and easy industrialized production, and the prepared TiB2 ceramic powder has the advantages of high activity, high purity, small particle size and narrow particle size distribution.

Description

technical field [0001] The invention belongs to the technical field of boride ceramic powder. Specifically relates to a preparation method of titanium boride ceramic powder based on titanium silicon ferroalloy. Background technique [0002] Titanium boride (TiB 2 ) has a high melting point, high hardness, high thermal conductivity, and good chemical stability and electrical conductivity. It can be used to prepare wear-resistant materials, electronic and electrical components, protective armor, metal composite reinforcement materials and modified ceramic additives. [0003] TiB 2 The particle size, particle size distribution, agglomeration and purity of powder are one of the key factors affecting the performance of ceramic products. The current industrial production of TiB 2 The high-temperature solid-phase carbothermal reduction process is adopted, and the particle size of the product is several microns to more than ten microns, which cannot meet the requirements of hig...

Claims

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Application Information

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IPC IPC(8): C04B35/58C22B5/02C04B35/626
CPCC04B35/58071C04B35/62605C04B2235/3201C04B2235/3409C04B2235/40C22B5/02
Inventor 柯昌明张锦化程登峰秦智王景然
Owner WUHAN UNIV OF SCI & TECH
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