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Preparation method of high-temperature oxidation-resistant TiB2 whiskers with high melting point

A high-temperature oxidation-resistant, high-melting point technology, applied in chemical instruments and methods, single crystal growth, crystal growth, etc., can solve problems such as difficult to obtain high-density whisker products, and can not strictly control the reaction process and product performance, to achieve the formation of The effect of clear mechanism, multiple choices of molten salt system, high migration rate and diffusion rate

Inactive Publication Date: 2019-04-16
TAIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the TiB2 whisker preparation method in the improved technical scheme is not easy to obtain high-density whisker products, and cannot strictly control its reaction process and product performance
In addition, the raw materials used in the SHS method are often flammable, explosive or toxic substances, requiring special safety measures

Method used

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  • Preparation method of high-temperature oxidation-resistant TiB2 whiskers with high melting point
  • Preparation method of high-temperature oxidation-resistant TiB2 whiskers with high melting point
  • Preparation method of high-temperature oxidation-resistant TiB2 whiskers with high melting point

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Effect test

Embodiment 1

[0034] The preparation method of a kind of anti-high temperature oxidation high melting point TiB whisker disclosed in this embodiment comprises the following steps:

[0035] S1, take TiB2 and KCl of the process proportioning number, wherein the molar ratio of TiB2 and KCl is 1:1, mix the TiB2 and KCl after weighing into the grinding machine, add a small amount of dehydrated alcohol simultaneously, without The amount of water alcohol added is adjusted according to the total amount of processing. The purpose is to achieve a better grinding effect. Usually, it is preferred to use 1 / 10 of the total amount of anhydrous alcohol. The total amount of anhydrous alcohol can be based on the liquid index of the reaction raw materials The ratio is obtained by corresponding calculation. To be ground into powder particles, which are in the state of powder particles of 70 mesh to 100 mesh, add the remaining anhydrous alcohol and stir evenly to obtain thick reaction raw materials. The liquid i...

Embodiment 2

[0041] The preparation method of a kind of anti-high temperature oxidation high melting point TiB whisker disclosed in this embodiment comprises the following steps:

[0042]S1. Weigh TiB2 and molten salt in the proportion of the process. The molten salt is a mixed powder of ZnSO4 7H2O and Na2CO3, wherein the molar ratio of TiB2 and molten salt is 1:1, and ZnSO4 7H2O and Na2CO3 in the molten salt system The molar ratio is 1:1.2. Mix the weighed TiB2 and molten salt into a grinder for grinding, and add a small amount of absolute alcohol at the same time. The amount of absolute alcohol added is adjusted according to the total amount of processing. The purpose is to achieve For a better grinding effect, it is usually preferred to use 1 / 10 of the total amount of anhydrous alcohol. The total amount of anhydrous alcohol can be obtained by corresponding calculation based on the liquid index ratio in the reaction raw materials. To be ground into powder particles, it is at 70 mesh~ In ...

Embodiment 3

[0048] The preparation method of a kind of anti-high temperature oxidation high melting point TiB whisker disclosed in this embodiment comprises the following steps:

[0049] S1, take by weighing TiB2 and molten salt of process proportioning number, molten salt selects Na2SO4, KCl mixed powder, wherein the molar ratio of TiB2 and molten salt is 1:0.8, wherein in the molten salt system Na2SO4 and the molar ratio of KCl are 1.5:1, mix the weighed TiB2 and molten salt into a grinder for grinding, and add a small amount of absolute alcohol at the same time, the amount of absolute alcohol added is adjusted according to the total amount of processing, the purpose is to achieve better grinding Effect, usually preferably 1 / 10 of the total amount of anhydrous alcohol, the total amount of anhydrous alcohol can be obtained by corresponding calculation based on the liquid index rate of the reaction raw materials, to be ground into powder particles, in the form of 70 mesh to 100 mesh powder...

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Abstract

The invention discloses a preparation method of high-temperature oxidation-resistant TiB2 whiskers with a high melting point. The preparation method comprises the following steps of weighing several parts of titanium diboride and molten salts according to a process ratio, mixing the weighed titanium diboride and molten salts, pouring the mixture into a grinding machine for grinding, adding an alcohol solution, conducting stirring uniformly, obtaining a thick reaction raw material, placing the reaction raw material in a vacuum tubular furnace, and conducting calcining treatment to obtain a sintered product; adding the sintered product into deionized water, filtering the mixture to obtain a solid powder cake product, and drying the solid powder cake product in a vacuum drying box to constantweight to obtain a finished product. In conclusion, the method has the advantages of simple process flow, moderate calcination temperature, low manufacturing cost and high product yield and is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of novel inorganic functional materials, in particular to a preparation method of high-temperature oxidation-resistant TiB2 whiskers with high melting point. Background technique [0002] Titanium diboride (TiB2) is the most stable compound of boron and titanium. It is a hexagonal crystal system and belongs to the C32 structure. It is a metalloid compound. The parameters of the TiB2 crystal structure are a=3.028 Å, c=3.228 Å. The crystal structure of TiB2 has a two-dimensional network structure similar to graphite, in which boron atoms and titanium atom faces appear alternately, so TiB2 has good thermal conductivity and electrical conductivity, so it can be processed by EDM; and B ions and B ions are directly pressed It is bound by covalent bond, and B ion and Ti ion are combined by ionic bond. Due to the existence of covalent bond and ionic bond, TiB2 material has high hardness, high melting point and exce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/10C30B29/62C30B9/12
CPCC30B9/12C30B29/10C30B29/62
Inventor 方一航张平冯尚申吴建波王天乐薛双喜刘壕东霍颜秋詹兴宇赵子栋
Owner TAIZHOU UNIV
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