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A new type of sp3 carbon material and its high-pressure preparation method

A carbon material and a new technology, applied in the field of sp3 carbon material preparation, to achieve the effect of simple and safe preparation process, excellent mechanical properties, and good sample crystallinity

Inactive Publication Date: 2018-11-27
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, the preparation of carbon materials with superhard properties is still a challenging work

Method used

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  • A new type of sp3 carbon material and its high-pressure preparation method
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  • A new type of sp3 carbon material and its high-pressure preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A diamond anvil with an anvil surface of 200 μm was used to pre-press a metal rhenium sheet, and a small hole with a diameter of 60 μm was drilled in the center of the indentation as a sample cavity. Will C 70 The @SWNTs sample fills the sample cavity, uses diamond as a pressure calibration substance, and adopts a hard pressing method without adding any pressure transmission medium for pressurization. When the pressure rises to 70GPa, the pressure is released to normal pressure, and a new carbon material with superhard properties is obtained, and the hardness reaches 90GPa in Vickers hardness. The electron micrographs and X-ray diffraction spectra of the new carbon materials are shown in Figure 5 with Image 6 .

Embodiment 2

[0035] Raw material, press and sample cavity are the same as embodiment 1. Will C 70 The @SWNTs sample fills the sample cavity, uses diamond as a pressure calibration substance, and adopts a hard pressing method without adding any pressure transmission medium for pressurization. When the pressure rises to 60GPa, the pressure is released to normal pressure, and a new carbon material with superhard properties is obtained. The X-ray diffraction spectrum of the new carbon material obtained is shown in Figure 7 .

[0036] Conclusion: When the pressure reaches 60GPa, the new superhard carbon material can still be obtained after the pressure is released.

Embodiment 3

[0038] Raw material, press and sample cavity are the same as embodiment 1. Will C 70 The @SWNTs sample fills the sample cavity, uses diamond as a pressure calibration substance, and adopts a hard pressing method without adding any pressure transmission medium for pressurization. When the pressure was raised to 50GPa, the pressure was released to normal pressure, and the X-ray diffraction spectrum of the product obtained was shown in Figure 8 .

[0039] Conclusion: When the pressure reaches 50GPa, the X-ray diffraction peak of the unloaded sample is the signal of the raw material carbon nanotubes, and a new type of carbon material with superhard properties cannot be obtained.

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Abstract

The invention relates to a novel sp3 carbon material and a high-pressure preparation method thereof, and belongs to the technical field of the preparation of superhard carbon materials. C60 @ SWNTs or C70 @ SWNTs is used as a raw material, a diamond anvil cell is used as a pressurizing device, a sample is filled into a sample chamber for pressurizing to greater than or equal to 60GPa in a transmission-medium-free hard pressurizing manner, and then depressurized to normal pressure to obtain the novel sp3 carbon material with super hard characteristics. The raw material used in the novel sp3 carbon material is common, reactant cost is low, the preparation process is safe and simple, the method does not need to add temperature variables, the prepared ultra hard carbon material has clearly differentiable X ray diffraction peaks, good crystallization and excellent mechanical properties, and can be stable under the normal pressure.

Description

technical field [0001] The invention belongs to sp 3 The technical field of carbon material preparation, specifically related to the use of C 60 doped carbon nanotubes or C 70 A new method for preparing superhard carbon materials with a new structure by using doped carbon nanotubes as raw materials through a high-pressure method. Background technique [0002] Carbon is a very common element. Due to its flexible bonding pattern, it can exist in a wide variety of forms. With the subsequent discovery of fullerenes, carbon nanotubes, and graphene, their excellent physical and chemical properties have been widely used in various fields. The properties of a material depend on its structure, so designing and synthesizing carbon materials with novel structures has aroused intense scientific interest, especially the synthesis of carbon materials with superhard properties. [0003] At present, people use different carbon nanomaterials as precursors, and use high pressure to explo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05B01J3/06
CPCB01J3/062C01P2002/01C01P2002/72C01P2002/82C01P2004/04
Inventor 刘冰冰姚明光杨西贵刘世杰刘然吴香英
Owner JILIN UNIV
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