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Preparation method of one-dimensional hierarchical-structure thin-wall BN microtube, and product thereof

A hierarchical structure, micro-tube technology, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., to achieve the effect of improving yield and purity, improving product purity, and high product purity

Active Publication Date: 2020-02-21
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing literature has not reported the BN one-dimensional hollow hierarchical structure with a micron-scale diameter

Method used

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  • Preparation method of one-dimensional hierarchical-structure thin-wall BN microtube, and product thereof
  • Preparation method of one-dimensional hierarchical-structure thin-wall BN microtube, and product thereof
  • Preparation method of one-dimensional hierarchical-structure thin-wall BN microtube, and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for preparing a thin-walled BN micron square tube with a one-dimensional hierarchical structure, comprising the following steps:

[0037] (1) According to MgCl 2 ·6H 2 O, H3 BO 3 With the molar ratio of fluxing agent NaCl 1:3.2:4.5, take by weighing 29.664g H 3 BO 3 and 30.5gMgCl 2 ·6H 2 O, 39.487gNaCl, after mixing, fully grind for 15min, put it into a muffle furnace and heat it to 1000°C, keep it warm for 6 hours, and cool to room temperature with the furnace to obtain the precursor;

[0038] (2) Take the above-prepared precursors and evenly scatter them in the alumina ark, put them into the tube furnace, pass through the ammonia gas after vacuuming, keep the temperature at 1150°C for 5h, cool down to 200°C with the furnace, and close Breathing valve, naturally cool to room temperature, obtain crude product;

[0039] (3) Disperse the crude product in 150ml of distilled water, add 100ml of 12mol / L hydrochloric acid, heat and stir at 80°C for 12h, then w...

Embodiment 2

[0045] A method for preparing a thin-walled BN micron square tube with a one-dimensional hierarchical structure, comprising the following steps:

[0046] (1) According to MgCl 2 ·6H 2 O, H 3 BO 3 With the molar ratio of flux KCl 1:3:5, weigh 18.54g H 3 BO 3 , 20.33 g MgCl 2 ·6H 2 O and 37.25g KCl were mixed and ground for 15 minutes, put into a muffle furnace and heated to 1000°C, kept for 5 hours, and cooled to room temperature with the furnace to obtain the precursor;

[0047] (2) Take the above-prepared precursors and evenly scatter them in the alumina ark, put them into the tube furnace, pass through the ammonia gas after vacuuming, keep the temperature at 1200°C for 2h, cool down to 200°C with the furnace, and close Breathing valve, naturally cool to room temperature, obtain crude product;

[0048] (3) Disperse the crude product in 150ml of distilled water, add 100ml of 12mol / L hydrochloric acid, heat and stir at 80°C for 12h, then wash with deionized water and ce...

Embodiment 3

[0051] A preparation method of a one-dimensional hierarchical structure thin-walled BN microtube, which comprises the following steps:

[0052] (1) According to MgCl 2 ·6H 2 O, H 3 BO 3 With the molar ratio of fluxing agent NaCl 1:3.5:5.5, weigh 21.63g H 3 BO 3 , 20.33 g MgCl 2 ·6H 2 O and 32.175g NaCl, mixed and fully ground for 15 minutes, put into a muffle furnace and heated to 800°C, kept for 4 hours, and cooled to room temperature with the furnace to obtain the precursor;

[0053] (2) Take the above-prepared precursors and evenly scatter them in the alumina ark, put them into the tube furnace, pass through the ammonia gas after vacuuming, keep the temperature at 1100°C for 3h, cool down to 200°C with the furnace, and close Breathing valve, naturally cool to room temperature, obtain crude product;

[0054] (3) Disperse the crude product in 150ml of distilled water, add 100ml of 12mol / L hydrochloric acid, heat and stir at 80°C for 12h, then wash with deionized water...

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Abstract

The invention relates to a preparation method of a hierarchical-structure thin-wall BN microtube. The preparation method mainly comprises the following steps: putting a boron-containing precursor intoa tube furnace, introducing nitriding reaction gas, carrying out heating to 1000-1200 DEG C, and keeping the temperature for 2 hours or more to obtain a large batch of high-quality one-dimensional boron nitride hierarchical-structure materials. According to the method, a substrate is not needed; the preparation method is simple and effective in process and low in energy consumption and uses cheapand non-toxic raw materials; and the purity of a purified target product is high, which is favorable for batch production of the boron nitride micro-nano hierarchical structure materials.

Description

technical field [0001] The invention relates to a preparation method of a thin-walled BN microtube with a one-dimensional hierarchical structure and a product thereof. Background technique [0002] Hexagonal boron nitride (h-BN) has excellent corrosion resistance, high temperature resistance, high thermal conductivity, low thermal expansion coefficient, and wave transmission and insulation properties. It is a new type of function that is widely used Materials have extremely important applications in fields such as hydrogen storage, heat conduction, lubrication, battery separator materials, catalysis, and high-temperature anti-oxidation coatings. Hexagonal boron nitride is a compound with a lattice structure and properties similar to graphene, so it is often called "white graphite", and it is also the main raw material for the synthesis of cubic boron nitride (c-BN). In recent years, with the development of micro-nano materials, the research on boron nitride micro-nano mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/064C01B3/00B82Y30/00B82Y40/00B01J20/02B01J20/30B01J27/138
CPCC01B21/064C01B3/001B82Y30/00B82Y40/00B01J20/0248B01J20/0259B01J27/138C01P2004/03C01P2004/04C01P2002/72C01P2004/64C01P2004/13Y02E60/32
Inventor 王吉林刘兵赛顾远平吉钰纯唐祥龙郑国源马飞文龙飞吴一周炳
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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