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

Preparation method of SiC@Ti (C, N) core-shell structure ceramic powder

A technology of ceramic powder and core-shell structure is applied in the field of preparation of SiC@Ti core-shell structure ceramic powder, which can solve the problems of poor bonding, high brittleness, low toughness of silicon carbide materials, etc., to achieve low cost and improve fracture toughness. , the effect of low preparation temperature

Active Publication Date: 2020-12-29
HUAQIAO UNIVERSITY
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, silicon carbide materials have low toughness and high brittleness, and the fracture toughness of silicon carbide wafers is generally 2.5-3MPa.m 1 / 2 Between; the sintering temperature of reaction sintered pure silicon carbide powder is between 1450-1700 °C, and the bonding of pure silicon carbide powder is poor below 1450 °C

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
  • Preparation method of SiC@Ti (C, N) core-shell structure ceramic powder
  • Preparation method of SiC@Ti (C, N) core-shell structure ceramic powder
  • Preparation method of SiC@Ti (C, N) core-shell structure ceramic powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Dissolve 2.00 g of titanyl sulfate in 50 mL of distilled water, stir in a water bath at 30° C. until clarified, remove insoluble matter by filtration, and dilute to 0.01 g / mL to obtain an aqueous solution of titanyl sulfate;

[0031] (2) Mix 2.00g of SiC powder, 20mL of ethylene glycol and 100mL of distilled water, and disperse them ultrasonically (frequency 20kHZ, power 300W) for 20-60min to obtain a mixed solution;

[0032] (3) Add 4.00g CO(NH 2 ) 2 Stir evenly, and at the same time slowly add 80mL of the above-mentioned titanyl sulfate aqueous solution, stir in a water bath for 24h until all the precipitates are precipitated, and then stand at room temperature for 48h;

[0033] (4) Centrifuge the material obtained in step (3), remove the supernatant, and obtain a precipitate. After repeated ultrasonic and centrifugal washing of the precipitate with distilled water and absolute ethanol, it is dried and ground to obtain SiC@Ti(C, N) precursor powder;

[0034] (5...

Embodiment 2

[0036] (1) Dissolve 2.00 g of titanyl sulfate in 50 mL of distilled water, stir in a water bath at 30° C. until clarified, remove insoluble matter by filtration, and dilute to 0.01 g / mL to obtain an aqueous solution of titanyl sulfate;

[0037] (2) Mix 2.00g of SiC powder, 20mL of ethylene glycol and 100mL of distilled water, and disperse them ultrasonically (frequency 20kHZ, power 300W) for 20-60min to obtain a mixed solution;

[0038] (3) Add 3.00g CO(NH 2 ) 2 Stir evenly, and at the same time slowly add 30mL of the above titanyl sulfate aqueous solution, stir in a water bath for 24h until all the precipitates are precipitated, and then stand at room temperature for 48h;

[0039] (4) Centrifuge the material obtained in step (3), remove the supernatant, and obtain a precipitate. After repeated ultrasonic and centrifugal washing of the precipitate with distilled water and absolute ethanol, it is dried and ground to obtain SiC@Ti(C, N) precursor powder;

[0040] (5) Put the ...

Embodiment 3

[0042] (1) Dissolve 2.00 g of titanyl sulfate in 50 mL of distilled water, stir in a water bath at 30° C. until clarified, remove insoluble matter by filtration, and dilute to 0.01 g / mL to obtain an aqueous solution of titanyl sulfate;

[0043] (2) Mix 2.00g of SiC powder, 20mL of ethylene glycol and 100mL of distilled water, and disperse them ultrasonically (frequency 20kHZ, power 300W) for 20-60min to obtain a mixed solution;

[0044] (3) Add 6.00g CO(NH 2 ) 2 and 2.00g g-C 3 N 4 Stir evenly, and at the same time slowly add 100mL of the above titanyl sulfate aqueous solution, stir in a water bath for 24 hours until all the precipitates are precipitated, and then stand at room temperature for 48 hours;

[0045] (4) Centrifuge the material obtained in step (3), remove the supernatant, and obtain a precipitate. After repeated ultrasonic and centrifugal washing of the precipitate with distilled water and absolute ethanol, it is dried and ground to obtain SiC@Ti(C, N) precurs...

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
thicknessaaaaaaaaaa
hardnessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of SiC@Ti (C, N) core-shell structure ceramic powder. The method comprises the following steps: (1) dissolving titanyl sulfate in distilled water to obtaina titanyl sulfate water solution; (2) mixing and dispersing SiC powder, an organic solvent and distilled water to obtain a mixed solution; (3) adding a carbon-nitrogen raw material into the mixed solution, simultaneously adding the titanyl sulfate aqueous solution, stirring in a water bath until all precipitates are separated out, and standing at room temperature; (4) centrifuging the material obtained in the step (3) to obtain a precipitate, fully washing with distilled water and absolute ethyl alcohol, drying and grinding to obtain SiC@Ti (C, N) precursor powder; and (5) calcining the SiC@Ti (C, N) precursor powder in a nitrogen atmosphere, and carrying out high-temperature annealing to obtain the product. The method is simple and easy to operate, and has the advantages of low preparation temperature, low cost, energy conservation, environmental protection and the like.

Description

technical field [0001] The invention belongs to the technical field of material synthesis, and in particular relates to a method for preparing SiC@Ti(C,N) core-shell structure ceramic powder. Background technique [0002] Silicon carbide has various excellent properties, such as superhard wear resistance, high thermal conductivity and mechanical strength, low thermal expansion coefficient, chemical corrosion resistance, high temperature stability (up to the decomposition temperature of 2500 ° C), useful resistance characteristics, etc. Silicon carbide is widely used as a structural material in various fields. However, silicon carbide materials have low toughness and high brittleness, and the fracture toughness of silicon carbide wafers is generally 2.5-3MPa.m 1 / 2 Between; the sintering temperature of reaction sintered pure silicon carbide powder is between 1450-1700 °C, and the bonding of pure silicon carbide powder is poor below 1450 °C. Contents of the invention [000...

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 Applications(China)
IPC IPC(8): C04B35/626C04B35/565
CPCC04B35/62685C04B35/62675C04B35/6268C04B35/565C04B2235/3843C04B2235/3886C04B2235/5454
Inventor 李东旭黄绍锋陆静
Owner HUAQIAO UNIVERSITY