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Synthesis method of nano hexaboride

A synthesis method and hexaboride technology, which is applied in the field of synthesis of nano-hexaboride materials, can solve the problems of high cost, complex process, and high energy consumption, and achieve the effects of reducing energy consumption, reducing reaction temperature, and simple operation

Inactive Publication Date: 2007-03-07
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the disadvantages of high cost, high energy consumption and complex process in the traditional method for preparing hexaboride, and provides a synthesis method of hexaboride with low reaction temperature and cost, short cycle and easy controllable grain size. method

Method used

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  • Synthesis method of nano hexaboride

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Experimental program
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Effect test

Embodiment 1

[0026] Proportional ingredients weigh analytically pure raw materials, LaCl 3 (2.326g) and NaBH 4 (2.1527g), mixed thoroughly and placed in a quartz tube reaction vessel. Put the quartz tube reaction vessel into a stainless steel autoclave and seal it; heat the autoclave to 550°C, keep it warm for 6 hours to fully proceed the reaction, and then cool it to room temperature; after collecting the product, use distilled water, 5% hydrochloric acid and distilled water in sequence Cleaning, and then drying the product obtained after filtration in a vacuum oven to obtain nano boride LaB 6 .

[0027] As can be seen from Figure 1, the resulting product is LaB 6 .

Embodiment 2

[0029] Proportional ingredients weigh analytically pure raw materials, CeCl 3 (2.1854g) and NaBH 4 (2.0126g), mixed well and placed in a quartz tube reaction vessel. Put the quartz tube reaction vessel into the stainless steel autoclave and seal it; heat the autoclave to 600°C, keep it warm for 3 hours to make the reaction fully proceed, and then cool it to room temperature; after collecting the product, use distilled water, 5% hydrochloric acid and distilled water in sequence Cleaning, and then drying the product obtained after filtration in a vacuum oven to obtain nano boride CeB 6 .

Embodiment 3

[0031] Proportional ingredients weigh analytically pure raw materials, CaCl 2 (1.2011g) and KBH 4 (3.5024g), fully mixed and then put into a stainless steel autoclave and then sealed; the autoclave was heated to 500 ° C, kept warm for 10 hours to allow the reaction to fully proceed, and then cooled to room temperature; Wash with hydrochloric acid and distilled water, and then dry the product obtained after filtration in a vacuum oven to obtain nano boride CaB 6 .

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Abstract

The invention discloses a synthesizing method of nanometer hexaboride (RB6), which comprises the following steps: adopting chloride of random one or two combinations of 57-71 rare earth metal elements, metal Y, alkaline earth Ba, Sr and Ca as raw material; making NaBH4 or KBH4 as reducer; reacting under low-temperature condition at 500-600 deg.c; washing; filtering; drying to obtain high-purity RB6 nanometer crystal powder.

Description

technical field [0001] The invention belongs to the technical field of material synthesis, in particular to a nanometer hexaboride (RB 6 ) Synthetic method of the material. Background technique [0002] Has CaB 6 A class of borides with a cubic crystal structure has the characteristics of high melting point, high strength and high chemical stability. They also have many special functions, such as: low electronic work function, constant specific resistance, strong anti-poisoning ability, and Strong ion bombardment ability, strong emission ability and high neutron absorption coefficient, etc. These superior properties make it widely used in national defense and civilian industries, and also have broad application prospects in high-tech fields such as military industry and aerospace. The best example is lanthanum hexaboride (LaB 6 ), it has been widely used as a cathode component in electron microscopes and energy spectrometers. Use LaB 6 Good electrical and thermal conduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/02C01B35/04
Inventor 霍德璇黄春云赵金涛
Owner HANGZHOU DIANZI UNIV
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