Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Sialon quasi monodimension nanometer material and its preparation method

A technology of nanomaterials and raw materials, which is applied in the field of Sialon quasi-one-dimensional nanomaterials and its preparation, can solve problems such as low yield, many impurities, and complicated processes, and achieve high yield, good crystallization uniformity, and simple preparation process Effect

Inactive Publication Date: 2008-12-03
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

At present, the synthesis methods of quasi-one-dimensional silicon nitride nanomaterials similar to Sialon structure mainly include: (1) carbon nanotube confinement growth method: carbon nanotubes are used as membrane plates, and silicon oxides or halides are used as silicon sources , synthesized Si in a large amount of nitriding atmosphere 3 N 4 Nanowires, this method needs to synthesize carbon nanotubes first, and the process is more complicated; (2) arc discharge method, laser ablation method: synthesize Si at high temperature by arc discharge or laser ablation technology 3 N 4 Nanowires, the disadvantage of this method is low yield and more impurities; (3) chemical vapor deposition (CVD) method: this method is generally formed by silicon powder, silicon oxide powder or silicon-containing halogen in a high temperature or plasma environment Silicon vapor reacts with the nitriding atmosphere, and grows silicon nitride nanomaterials by the VLS mechanism through impurity nucleation on a certain cooling substrate. This method has a low yield and certain impurities; (4) hydrothermal synthesis method; ( 5) Carbothermal reduction method

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The Sialon quasi-one-dimensional nanomaterial is composed of the following components according to weight percentage: 55% hydrogen-containing silicone oil, 43% ethylenediamine, and 2% Al powder. The preparation method of Sialon quasi-one-dimensional nanomaterials, a. Mix 198ml of hydrogen-containing silicone oil, 155ml of ethylenediamine and 6 grams of Al powder, and react in a reaction kettle. The reaction temperature is controlled at 0-100°C, and the solvent used is 500ml of tetrahydrofuran. and n-hexane 250ml, stirring continuously at room temperature for 8 to 12 hours, reacting to form Si-Al-O-N-C polymer; Inject nitrogen, the nitrogen flow rate is 200-400ml / min, the temperature process is within the temperature range of room temperature to 750°C, the heating rate is 5°C / min, and the temperature is kept at 750°C for 1 hour, and within the temperature range of 750-1000°C, The heating rate is 5°C / min, and the temperature is kept at 1000°C for 1 hour to obtain Si-Al-O-...

Embodiment 2

[0019] A Sialon quasi-one-dimensional nanometer material and its preparation method. Its raw materials are composed of the following components according to weight percentage: 37% of hydrogen-containing silicone oil, 60% of ethylenediamine, and 3% of Al powder. The steps are: a. Mix 169ml of hydrogen-containing silicone oil, 274ml of ethylenediamine and 15g of Al powder, and react in a reaction kettle. The reaction temperature is controlled at 0-100°C. Under constant stirring for 8 to 12 hours, the reaction forms Si-Al-O-N-C polymer. Other steps and processing condition are identical with specific embodiment 1. Sialon nanobelts with a thickness of 50nm, a width of 300nm, and a length of hundreds of μm were formed by crystallization in a graphite crucible.

Embodiment 3

[0021]A Sialon quasi-one-dimensional nanometer material and its preparation method. Its raw materials are composed of the following components according to weight percentage: 45% of hydrogen-containing silicone oil, 45% of ethylenediamine, and 10% of Al powder. The steps are: a. Mix 68ml of hydrogen-containing silicone oil, 70ml of ethylenediamine and 15g of Al powder, and react in a reaction kettle. The reaction temperature is controlled at 0-100°C. Under constant stirring for 8 to 12 hours, the reaction forms a Si-Al-O-N-C polymer; b. The product obtained in the previous step is placed in a graphite crucible, and the graphite crucible is placed in an atmosphere pressure sintering furnace, and nitrogen gas is introduced, and the nitrogen pressure in the furnace Controlled at 1.5MPa, controlled temperature at 1200°C for 3 hours, and crystallized in a graphite crucible to form Sialon quasi-one-dimensional nanomaterials, which are Sialon nanobelts with a thickness of 80nm, a widt...

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
widthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

This invention involves a Sialon quasi-one dimensional material, its raw material accordance to weight percentage includes: hydrogen silicone 37% to 55%, ethylenediamine 43% ~ 60%, Al powder 2% ~ 10%; Their preparation methods include the following steps : 1.in accordance with the percentage of weight take hydrogen silicone, ethylenediamine, Al powder, mixed in Reactor reaction, the reaction temperature is controlled at 0 ~ 00deg, under the conditions of constant stirring for 8 to 12 hours, obtain Si-Al-O-N - C polymer; 2. put the product of above step in graphite crucible, and then put the graphite crucible in atmosphere pressure sintering furnace, leads to nitrogen, control the furnace nitrogen pressure at 0.5 to 1.5 MPa and temperature at 1200 ~ 1500 deg for two to three hours, to obtain sialon quasi-dimensional materials in graphite crucible by crystallization. Its excellent dielectric properties, high mechanical strength, heat-resistance properties and thermal conductivity, and preparation of simple, low production cost, high yield, good uniformity of crystallization.

Description

technical field [0001] The invention relates to a nano material and a preparation method thereof, in particular to a Sialon quasi-one-dimensional nano material and a preparation method thereof. Background technique [0002] Nanotechnology is considered to be the most important science and technology in the 21st century. Nanoscience and technology will change the properties of almost every man-made substance, and major improvements in material performance and major changes in manufacturing methods will cause a new industrial revolution in the new century. In 1991, Iijima discovered carbon nanotubes, and its unique structural characteristics and physical and chemical properties set off a research boom worldwide. After that, people prepared MoS 2 、WS 2 , BN, GaN nanotubes and Si, Ag, CdTe, GaN nanowires and other new one-dimensional nanomaterials, and developed a series of new preparation methods for one-dimensional nanomaterials. Due to the special transmission characteris...

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): C04B35/599C04B35/626
Inventor 温广武覃春林
Owner HARBIN INST OF TECH AT WEIHAI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products