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Self-propagating synthesis method for submicron-grade TiB2 powder

A submicron-scale, synthetic method technology, applied in the direction of boron/boride, metal boride, etc., can solve the problems of high preparation cost, high cost of raw materials and equipment, and difficulty in controlling the purity of boron thermal reduction method, and achieve low production cost , high production efficiency and simple operation

Inactive Publication Date: 2016-08-24
BEIJING GUANGKEBOYE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Borothermic reduction method has high preparation cost and difficult to control the purity
Gas-phase reaction method can prepare nano-sized TiB 2 Powder, but the cost of raw materials and equipment is high, the production capacity is small, and the production efficiency is low
In summary, the existing TiB 2 There are certain technical bottlenecks in the preparation technology in terms of quality, cost and industrialization efficiency

Method used

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  • Self-propagating synthesis method for submicron-grade TiB2 powder
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  • Self-propagating synthesis method for submicron-grade TiB2 powder

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Effect test

Embodiment 1

[0028] TiO 2 , B 2 o 3 and magnesium powder according to the mass ratio TiO 2 :B 2 o 3 :Mg=80:105:120 ingredients, namely B 2 o 3 Excessive 50%, metal magnesium excessive 5%. After preliminary mixing in the stainless steel barrel, put it into a drum mixer with alumina lining, add zirconia balls with a diameter of 10mm, zirconia balls and TiO 2 , B 2 o 3 The mass ratio to the sum of the total weight of the metal magnesium powder is 1:1, and the materials are mixed for 2 hours at a speed of 25 rpm, and the raw materials are mixed evenly. The material is pressed into a cylindrical green body with a diameter of 50 mm under a pressure of 5 MPa using a stainless steel mold. Put the pressed cylindrical green body into the graphite boat, insert the plug-in board, put the graphite boat into the self-propagating reaction chamber, and then pass the flowing Ar gas to protect the self-propagating reaction chamber after evacuating the self-propagating reaction chamber. After elec...

Embodiment 2

[0030] TiO 2 , B 2 o 3 and magnesium powder according to the mass ratio TiO 2 :B 2 o 3 :Mg=80:91:132 ingredients, ie B 2 o 3 Excessive 30%, metal magnesium excessive 10%. After preliminary mixing in the stainless steel barrel, put it into a drum mixer with alumina lining, add zirconia balls with a diameter of 10mm, zirconia balls and TiO 2 , B 2 o 3The mass ratio to the sum of the total weight of the metal magnesium powder is 1:1, and the materials are mixed for 2 hours at a speed of 25 rpm, and the raw materials are mixed evenly. The material is pressed into a cylindrical green body with a diameter of 50 mm under a pressure of 7 MPa using a stainless steel mold. Put the pressed cylindrical green body into the graphite boat, insert the plug-in plate, put the graphite boat into the self-propagating reaction chamber, and put the flowing Ar gas into the reaction chamber for protection after evacuating the reaction chamber. After electrification, the white-hot electric ...

Embodiment 3

[0032] TiO 2 , B 2 o 3 and magnesium powder according to the mass ratio TiO 2 :B 2 o 3 :Mg=80:105:132 ingredients, namely B 2 o 3 Excessive 50%, metal magnesium excessive 10%. After preliminary mixing in the stainless steel barrel, put it into a drum mixer with alumina lining, add zirconia balls with a diameter of 10mm, zirconia balls and TiO 2 , B 2 o 3 The mass ratio to the sum of the total weight of the metal magnesium powder is 1.5:1, and the raw materials are mixed evenly at a speed of 25 rpm for 2 hours. The material is pressed into a cylindrical green body with a diameter of 50 mm under a pressure of 10 MPa using a stainless steel mold. Put the pressed cylindrical green body into the graphite boat, insert the plug-in plate, put the graphite boat into the self-propagating reaction chamber, and put the flowing Ar gas into the reaction chamber for protection after evacuating the reaction chamber. After electrification, the white-hot electric heating wire ignites...

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Abstract

The invention belongs to the field of preparation of ceramic materials and boride powder and in particular relates to a self-propagating synthesis method for submicron-grade TiB2 powder. The self-propagating synthesis method comprises the following steps: mixing materials, compacting, igniting, breaking and grinding, carrying out acid pickling, filtering, drying, and carrying out airflow pulverization. When the self-propagating synthesis method is adopted for preparing the submicron-grade TiB2 powder, the obtained submicron-grade TiB2 powder is high in purity, low in granularity and relatively high in sintering activity; the purity can reach 98.5% or more, industrial production can be realized, a synthesis technology is mature, and production cost is relatively low; and the synthesis method is easy to operate, production efficiency is high, dust output is low, and the prepared TiB2 powder is high in purity, low in granularity and relatively high in sintering activity.

Description

technical field [0001] The invention belongs to the field of preparation of ceramic materials and boride powders, in particular to a submicron TiB 2 Self-propagating synthesis of powders. Background technique [0002] Titanium diboride (TiB 2 ) has a high melting point (2980°C), low density (4.5g / cm3), high hardness (HV=34GPa), high flexural strength and fracture toughness, excellent thermal conductivity, electrical conductivity, wear resistance and chemical stability , especially resistant to molten metal corrosion. Titanium diboride can be completely wetted by metal aluminum liquid, which is the only material system known to be completely wet in the ceramic / metal system. The hardness of titanium diboride is second only to diamond, cubic boron nitride (c-BN) and boron carbide, and higher than oxide and nitride ceramic materials. Based on the above excellent characteristics, TiB2 has shown excellent use in some unique application fields such as cutting tools, wear-resist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/58C04B35/626C01B35/04
CPCC04B35/58071C01B35/04C01P2002/72C01P2004/62C01P2006/80C04B35/6267C04B2235/3232C04B2235/3409C04B2235/401
Inventor 田陆黄郁君
Owner BEIJING GUANGKEBOYE SCI & TECH
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