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Method for preparing SiC nanometre wires and nanometre belts

A nanobelt and nanowire technology, which is applied in the field of preparing SiC nanowires and nanobelts, can solve the problems of SiC nanowires and nanobelts with complex preparation process, impure products, and difficult control, and achieve environmental protection and large-scale production. The effect of low production cost and easy operation

Active Publication Date: 2012-06-13
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of complex preparation process of SiC nanowires and nanobelts in the current technology, high cost, difficult control, and impure products, the invention provides a method for preparing SiC nanowires and nanobelts

Method used

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  • Method for preparing SiC nanometre wires and nanometre belts
  • Method for preparing SiC nanometre wires and nanometre belts
  • Method for preparing SiC nanometre wires and nanometre belts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The block graphite was washed with absolute ethanol and dried in an oven for later use.

[0026] Weigh 75g of Si powder, 15g of SiC powder, 15g of C powder, 10g of Al 2 o 3 pink. Place in a turpentine ball mill jar, put agate balls of different numbers and diameters into the ball mill jar, and perform ball milling and mixing treatment on a planetary ball mill for 4 hours to obtain a mixed powder.

[0027] Put half of the mixed powder into the graphite crucible, put the prepared block graphite, then put the other half of the mixed powder, shake the crucible slightly to make the powder evenly embed the block graphite, and then put the graphite crucible Put graphite into the hot-press vacuum reaction furnace with graphite as the heating element. After evacuating for 30 minutes, make the vacuum degree reach -0.09MPa, keep the vacuum for 30 minutes, and observe whether the indication of the vacuum gauge changes. If there is no change, it means that the system is well seal...

Embodiment 2

[0030] The block graphite was washed with absolute ethanol and dried in an oven for later use.

[0031] Weigh 78g of Si powder, 10g of SiC powder, 11g of C powder, 6g of Al 2 o 3 pink. Place in a turpentine ball mill jar, put agate balls of different numbers and diameters into the ball mill jar, and perform ball milling and mixing treatment on a planetary ball mill for 3 hours to obtain a mixed powder.

[0032] Put half of the above mixed powder into the graphite crucible, put the prepared block graphite, then put the other half of the sintered material, shake the crucible slightly to make the mixed powder evenly embed the block graphite, and then put the graphite crucible Put graphite into a hot-pressed vacuum reaction furnace with graphite as a heating element. After evacuating for 30 minutes, make the vacuum degree reach -0.09MPa, keep the vacuum for 30 minutes, and observe whether the indication of the vacuum gauge changes. If there is no change, it means that the syste...

Embodiment 3

[0035] The block graphite was washed with absolute ethanol and dried in an oven for later use.

[0036] Weigh 85g of Si powder, 5g of SiC powder, 7g of C powder, 3g of Al 2 o 3 pink. Place in a turpentine ball mill jar, put agate balls of different numbers and diameters into the ball mill jar, and perform ball milling and mixing treatment on a planetary ball mill for 2 hours to obtain a mixed powder.

[0037] Put half of the above mixed powder into the graphite crucible, put the prepared block graphite, then put the other half of the embedding material, shake the crucible slightly to make the mixed powder evenly embed the block graphite, and then put the graphite The crucible is placed in a hot-press vacuum reactor with graphite as a heating element. After evacuating for 30 minutes, make the vacuum degree reach -0.09MPa, keep the vacuum for 30 minutes, and observe whether the indication of the vacuum gauge changes. If there is no change, it means that the system is well sea...

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Abstract

The invention relates to a method for preparing SiC nanometre wires and nanometre belts. The method comprises the following step of: preparing the SiC nanometre wires and nanometre belts on a Si-Sic composite ceramic matrix by a two-step method combining reaction sintering with in-situ reaction. A plurality of high-purity SiC nanometre wires and nanometre belts can be prepared in the method with low cost, simplicity and high efficiency, so that the problems such as a complicated preparation process, high cost, difficult control, impurity of prepared products, and the like, of the SiC nanometre wires and nanometre belts in the prior art are solved.

Description

technical field [0001] The invention relates to a method for preparing SiC nanowires and nanobelts. The SiC nanowires and nanobelts are synthesized on a Si-SiC composite ceramic matrix by a two-step method combining reaction sintering and in-situ reaction. The method can be low-cost , Simple and efficient preparation of a large number of high-purity SiC nanowires and nanobelts, which solves the problems of complex preparation process, high cost, difficult control, and impure products of SiC nanowires and nanobelts in the current technology. Background technique [0002] In recent years, due to the potential application value of nanomaterials in the field of modern science and technology, the preparation technology of one-dimensional nanomaterials (including: nanotubes, nanowires, nanorods, nanobelts, etc.) has received extensive attention. Among them, one-dimensional SiC nanomaterials have excellent electrical, optical and mechanical properties, and have great potential appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/36B82Y40/00C01B32/984
Inventor 李贺军褚衍辉付前刚李克智
Owner NORTHWESTERN POLYTECHNICAL UNIV
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