Preparation method of TiB2 ultrafine powder material

An ultra-fine powder, powder technology, applied in the direction of boron/boride, metal boride, etc., can solve the problems of material oxidation, volatilization loss, etc., and achieve the effect of low energy consumption, short production process, and cost reduction

Inactive Publication Date: 2013-08-28
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has a very high melting point, high chemical stability and excellent wear resistance. It is used as hard tool materials, abrasives, protective materials, cemented carbide additives and wear-resistant parts, etc., and has been widely used in these applications. research; meanwhile, TiB 2 It also has excellent electrical properties, and its conductivity is even better than that of metal titanium, which makes it able to make up for the deficiency of most ceramic materials. It is an important electronic ceramic material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] The present invention is a TiB 2 The preparation method of superfine powder material, its step is:

[0016] (1) In terms of mass percentage, according to Mg: 33.76 ~ 43.96, B 2 o 3 : 18.42~23.98, TiO 2 : 16.89~22.00, NaCl: 10.07~30.92 ratio for batching;

[0017] (2) Put the weighed raw material powder into a stainless steel ball mill tank, and mill it on the ball mill for 8-24 hours to make the powder mix evenly;

[0018] (3) Put the uniformly mixed reaction materials in the mold, and press them into a round cake-shaped billet under a pressure of 15-30 MPa; put the igniter tablet in the copper crucible in the reaction kettle, and then smooth the formed billet placed on the igniter;

[0019] (3) At room temperature, fill the reaction vessel with 0.5-1.5MPa argon gas, and exhaust it after 10 minutes to remove the air in the kettle; then turn on the heating control switch of the reaction vessel, when the temperature of the reaction vessel rises to 180-200 Exhaust ag...

Example Embodiment

[0024] Example 1:

[0025] According to mass percentage Mg: 43.96, B 2 o 3 : 23.98, TiO 2 : 22.00, NaCl: 10.06 Weigh each reactant powder, then put the body into a stainless steel ball mill tank, mix evenly on a planetary ball mill, the ball milling time is 10h under the condition of 100r / min rotating speed, and the ball milling medium is Al 2 o 3 The mass ratio of ball to material is 1:2. Put the uniformly mixed reaction materials in the mold, and press it into a round cake-shaped blank under the pressure of 15MPa on the press; place the igniter tablet in the copper crucible in the reaction kettle, and then place the round cake-shaped blank smoothly Then the reaction kettle is sealed, and 0.5MPa argon is filled into the kettle, and the gas in the kettle is discharged after 10 minutes to remove the air existing in the kettle; the heating switch is turned on, and the gas is discharged again when the temperature in the kettle rises to 180°C. Then fill it with 1.5MPa arg...

Example Embodiment

[0026] Example 2:

[0027] According to mass percentage Mg: 39.94, B 2 o 3 : 21.78, TiO 2 : 19.99, NaCl: 18.29 Weigh each reactant powder, then put the body into a stainless steel ball mill jar, mix evenly on a planetary ball mill, the ball milling time is 15h under the condition of 120r / min rotating speed, and the ball milling medium is Al 2 o 3 The mass ratio of ball to material is 1:2.5. Put the uniformly mixed reaction materials in the mold, and press it into a round cake-shaped blank under the pressure of 20MPa on the press; place the igniter tablet in the copper crucible in the reaction kettle, and then place the round cake-shaped blank smoothly Then the reaction kettle is sealed, and 1.0MPa argon gas is filled into the kettle, and the gas in the kettle is discharged after 10 minutes to remove the air existing in the kettle; the heating switch is turned on, and the gas is discharged again when the temperature in the kettle rises to 190°C. Then fill it with 2MPa ...

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Abstract

The invention relates to a preparation method of a TiB2 ultrafine powder material. The preparation method comprises the following steps of: (1) blending the following components by mass percent: 33.76-43.96% of Mg, 18.42-23.98% of B2O3, 16.89-22.00% of ZrO2 and 10.07-30.92% of NaCl; (2) uniformly mixing weighed raw material powders on a ball grinding mill; (3) placing uniformly mixed powder into a mould, and pressing the powder into a cake blank at the pressure of 15-30MPa; placing an ignition agent into a copper crucible in a reaction kettle, and then placing the cake blank on the ignition agent; introducing argon into the reaction kettle at room temperature; turning on a heating switch, exhausting again when temperature in the reaction kettle is increased to 180-220 DEG C, and then introducing 1.5-3MPa argon; and combusting the ignition agent when the temperature in the reaction kettle is increased to 250-300 DEG C, initiating a self-propagating combustion reaction of the blank by virtue of heat produced by combustion of the ignition agent, and turning off the heating switch at the moment until all the materials react completely and are converted into a product containing TiB2 blocks; and (4) taking out the product and grinding the product into powder, then leaching TiB2 with hydrochloric acid, and carrying out vacuum drying to obtain TiB2 ultrafine powder.

Description

technical field [0001] The present invention relates to TiB 2 Preparation technology of powder materials. Background technique [0002] TiB 2 It is an important boride material with special physical and chemical properties. It has a very high melting point, high chemical stability and excellent wear resistance. It is used as hard tool materials, abrasives, protective materials, cemented carbide additives and wear-resistant parts, etc., and has been widely used in these applications. research; meanwhile, TiB 2 It also has excellent electrical properties, and its conductivity is even better than that of metal titanium, which makes it able to make up for the deficiency of most ceramic materials. It is an important electronic ceramic material and can be used as an inert electrode material and high-temperature electrical components; TiB 2 Good oxidation resistance, it decomposes at 450°C to produce decomposition product B 2 o 3 The melting point is low (450°C), and it melts...

Claims

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Application Information

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IPC IPC(8): C01B35/04
Inventor 喇培清韩少博卢学峰欧玉静郭鑫魏玉鹏
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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