Preparation method for conglobated molybdenum disilicide powder

A molybdenum disilicide and powder technology, which is applied in the field of the preparation of agglomerated spherical molybdenum disilicide powder, can solve the problems such as the decrease of product strength, the influence of service performance, restricting the application of molybdenum and its alloys, etc. Effect

Inactive Publication Date: 2017-12-29
张家港市思杰五金工具有限公司
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although metal molybdenum and its alloys are good materials for preparing high-temperature furnace heating elements and structural parts, they will be violently oxidized when the temperature is above 600°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 for conglobated molybdenum disilicide powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation method of agglomerated spherical molybdenum disilicide powder

[0021] 1. Disperse molybdenum disilicide powder and dispersant in a solvent to make a suspension, and use an ultrasonic cleaner to disperse fine molybdenum disilicide powder in the liquid medium;

[0022] 2. Add an aqueous solution of 4wt.% polyvinyl alcohol to the liquid medium of dispersed molybdenum disilicide powder to prepare a slurry;

[0023] 3. Spray and granulate the slurry through atomization and granulation equipment to obtain spherical particles. The atomization and drying granulation meets the conditions: centrifugal atomizer speed 20,000rpm, feed temperature 25°C, drying inlet temperature 300°C, drying outlet Temperature 100°C;

[0024] 4. Vacuum heat treatment is carried out on the spherical particles obtained by granulation in a vacuum environment to remove the organic binder in the powder particles and make them densified, so as to improve the powder density and strength. 100 ...

Embodiment 2

[0028] Preparation method of agglomerated spherical molybdenum disilicide powder

[0029] 1. Disperse molybdenum disilicide powder and dispersant in a solvent to make a suspension, and use an ultrasonic cleaner to disperse fine molybdenum disilicide powder in the liquid medium;

[0030] 2. Add an aqueous solution of 3wt.% polyvinyl alcohol to the liquid medium of dispersed molybdenum disilicide powder to prepare a slurry;

[0031] 3. Spray and granulate the slurry through atomization and granulation equipment to obtain spherical particles. The atomization and drying granulation meets the conditions: centrifugal atomizer speed 20,000rpm, feed temperature 20°C, drying inlet temperature 300°C, drying outlet Temperature 100°C;

[0032] 4. Vacuum heat treatment is carried out on the spherical particles obtained by granulation in a vacuum environment to remove the organic binder in the powder particles and make them densified, so as to improve the powder density and strength. 100 ...

Embodiment 3

[0034] Preparation method of agglomerated spherical molybdenum disilicide powder

[0035] 1. Disperse molybdenum disilicide powder and dispersant in a solvent to make a suspension, and use an ultrasonic cleaner to disperse fine molybdenum disilicide powder in the liquid medium;

[0036] 2. Add an aqueous solution of 4wt.% polyvinyl alcohol to the liquid medium of dispersed molybdenum disilicide powder to prepare a slurry;

[0037] 3. The slurry is sprayed and granulated through the atomization granulation equipment to obtain spherical particles, and the atomization drying granulation meets the conditions: the rotational speed of the centrifugal atomizer is 18000rpm, the feed temperature is 25°C, the drying inlet temperature is 300°C, and the drying outlet Temperature 100°C;

[0038] 4. Vacuum heat treatment is carried out on the spherical particles obtained by granulation in a vacuum environment to remove the organic binder in the powder particles and make them densified, so ...

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
Densityaaaaaaaaaa
Fluidityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method for conglobated molybdenum disilicide powder. The method comprises the following steps: (1) preparing a suspension by dispersing molybdenum disilicide powder and dispersing agent into a solvent and using an ultrasonic cleaner for dispersing fine molybdenum disilicide powder in a liquid medium; (2) adding a polyvinyl alcohol aqueous solution into the liquid medium with dispersed molybdenum disilicide powder, thereby acquiring a sizing agent; (3) using an atomizing pelletizing device for atomizing and pelletizing the sizing agent, thereby acquiring a spherical particle; (4) performing vacuum heat treatment on the spherical particle acquired by pelletizing under vacuum environment, thereby removing the organic binding agent in the powder particle, compacting the powder particle and increasing the density and strength of the powder. The powder acquired by atomizing and pelletizing according to the invention has high degree of sphericity, is of spherical shape and has higher liquidity. The grain size of the thermally treated powder is within 50-80um; the density of the silicon dioxide powder is 1.68g/cm3; the liquidity is 38s/50g.

Description

technical field [0001] The application belongs to the technical field of materials, in particular to a preparation method of agglomerated spherical molybdenum disilicide powder. Background technique [0002] Metal molybdenum and its alloys have the advantages of high strength, high melting point, corrosion resistance and wear resistance, and are used to manufacture alloy components and parts of warships, tanks, guns, rockets, and satellites. In addition, metal molybdenum and its alloys are often used to manufacture heating elements and structural materials for high-temperature furnaces, such as electrodes for furnaces and high-temperature structural materials for glass melting in the glass and refractory fiber industries, and electrodes and smelting materials in the rare earth industry. Stirring stick etc. [0003] Although metal molybdenum and its alloys are good materials for preparing high-temperature furnace heating elements and structural parts, they will be violently ...

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
IPC IPC(8): C01B33/06
CPCC01B33/06C01P2004/32C01P2004/61C01P2006/10C01P2006/22
Inventor 范佳晨
Owner 张家港市思杰五金工具有限公司
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
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap