Unlock instant, AI-driven research and patent intelligence for your innovation.

Sialon bicrystal nanoribbon and method for preparing same

A nanobelt, dry method, applied in nanotechnology and other directions, to achieve the effect of clean surface, perfect structure and high purity

Inactive Publication Date: 2014-04-30
HARBIN INST OF TECH AT WEIHAI
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the synthesis method of Sialon twin crystal nanobelts.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sialon bicrystal nanoribbon and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0014] The preparation method of the above-mentioned Sialon twin-crystal nanobelt of the present invention comprises the following steps: a. Mixing Si-Al-O-N-C powder and carbon powder to make a mixed powder, and the weight ratio of carbon powder to the mixed powder is 2 -10%; b. Perform dry or wet ball milling of the mixed powder; c. Mold the ball-milled powder into a circular prefabricated block with a height of 2-20mm and an outer diameter of 12-16mm , the diameter of the inner circle is 8-10mm; d. The annular prefabricated block is placed in a graphite crucible, placed in an atmosphere pressure sintering furnace, evacuated, then heated to 150-200 ° C, and nitrogen is introduced, and the nitrogen pressure in the furnace is controlled At 0.5-1.0MPa; e. When the pressure in the furnace is stable, continue to heat up, and keep the temperature at 1200-1600°C for 1-3 hours to form Sialon twin-crystal nanobelts around the annular prefabricated block.

[0015] During the heating p...

Embodiment 1

[0017] Embodiment 1: a kind of preparation method of Sialon twin crystal nanobelt: a. Mix 98 grams of Si-Al-O-N-C powder with 2 grams of graphite powder, add 500ml of dehydrated alcohol and carry out planetary ball milling for 6 hours, then take out and dry to obtain Mixed powder; b. Mold the mixed powder into a ring-shaped preform, the height of the ring-shaped preform is 10mm, the diameter of the outer circle is 12mm, and the diameter of the inner circle is 10mm; d. The ring-shaped preform is placed in a graphite crucible and placed in the atmosphere In the pressure sintering furnace, vacuumize and then heat it to 200°C, feed nitrogen, and control the nitrogen pressure in the furnace at 0.8MPa; e. When the pressure in the furnace is stable, continue to heat up, and keep the temperature at 1450°C for 1 hour. Sialon twinned nanoribbons were formed around the annular preform. Through scanning electron microscope observation, the obtained Sialon double crystal nanobelt has a thi...

Embodiment 2

[0018] Example 2: A preparation method of a Sialon twin-crystal nanobelt: a. Mix 90 grams of Si-Al-O-N-C powder with 10 grams of amorphous carbon powder, add 500 ml of absolute ethanol, perform planetary ball milling for 10 hours, and then take out the oven. Dry to obtain mixed powder; b. Mold the mixed powder into an annular preform, the height of the annular preform is 10mm, the diameter of the outer circle is 16mm, and the diameter of the inner circle is 10mm; d. The annular preform is placed in a graphite crucible and placed Put it into the atmosphere pressure sintering furnace, evacuate and then heat it to 200°C, feed nitrogen, and control the nitrogen pressure in the furnace at 0.8MPa; e. When the pressure in the furnace is stable, continue to heat up and keep the temperature at 1450°C for 2 hours, Sialon twinned nanoribbons were formed around the annular preform. Through scanning electron microscope observation, the obtained Sialon double crystal nanobelt is 40 nm thick...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a Sialon bicrystal nanoribbon and a method for preparing the same, wherein Si-Al-O-N-C powder and carbon powder are compressed into a circular precast block, and then the Sialon bicrystal nanoribbon is formed at the periphery of the circular precast block through growth by the chemical vapor deposition method in the high-pressure nitrogen environment; and the Sialon bicrystal nanoribbon is 10-800 nm thick, 0.1-10 microns wide and 1-15 mm long. The obtained Sialon bicrystal nanoribbon has unique properties and application prospect that other nanoribbons do not have, for example, excellent dielectric property, thermal conductivity and mechanical strength. As the unique bicrysal structure is formed in the growth direction, the Sialon bicrystal nanoribbon can be applied to light conversion and can also be used to establish a light detection device and the like.

Description

technical field [0001] The invention relates to a nanobelt and a preparation method thereof, in particular to a Sialon twin crystal nanobelt with a double crystal structure in the growth direction and a preparation method thereof. Background technique [0002] As a novel one-dimensional nanostructure, double-crystal nanoribbons have special confinement effects, which will lead to their different mechanical strength, electrical and optical properties from single-crystal nanoribbons, such as extremely high near double-crystal grain boundaries. Resistive steric hindrance can effectively block the movement of dislocations, so that the tensile strength of the Cu nano-twin structure is more than 10 times higher than that of polycrystalline Cu. In addition, the nano-twin structure of Cu can effectively retard copper at the grain boundaries. Electromigration of atoms, which means that if copper wires with a high-density Cu nano-twin structure are introduced into integrated circuit c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/599C04B35/622B82Y40/00
Inventor 覃春林温广武王鑫宇宋亮夏龙王春雨钟博
Owner HARBIN INST OF TECH AT WEIHAI