Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of large-sized compact silicon carbide ceramic plate

A large-scale technology of silicon carbide ceramics, applied in the field of silicon carbide ceramics, can solve the problems of easy cracking, uneven density, poor compactness, etc., and achieve the effects of improving production efficiency, ensuring sintering quality, and increasing density

Active Publication Date: 2018-02-09
WEIFANG HUAMEI FINE TECHN CERAMICS
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its ultra-long, ultra-wide, and ultra-thick structural characteristics, the preparation of large-scale silicon carbide ceramic plates encounters technical obstacles such as formulation, molding, drying, and firing, especially cracking, uneven density, and compactness. Problems such as poor performance and raw burning make it a technical difficulty and a blank in the industry

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 large-sized compact silicon carbide ceramic plate
  • Preparation method of large-sized compact silicon carbide ceramic plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Prepare a silicon carbide ceramic plate with a length×width×thickness of 600mm×400mm×40mm by the following method, including the following steps:

[0023] 1) Mixing mix 1 part by weight of graphite powder with a purity of 99.8 to 99.9% and 25 parts by weight of silicon carbide powder with a purity of 99.8 to 99.9%, and then add 2 parts by weight of zinc stearate and 15 parts by weight of The polyvinyl alcohol is uniformly stirred to obtain a mixture;

[0024] 2) Spray granulation adopts a centrifugal spray dryer to spray and granulate the mixture to obtain granulated powder;

[0025] 3) Hot-press forming Put the prepared granulated powder into a metal mold, use a 500-600T hot-press machine, pressurize and release pressure 4 times under the conditions of temperature 180°C and pressure 35MPa, and obtain a hot-press forming plate body;

[0026] 4) Humidification and drying Place the formed green body in a humidification and drying equipment, and slowly humidify and dry f...

Embodiment 2

[0031] Prepare a silicon carbide ceramic plate with a length×width×thickness of 700mm×500mm×50mm by the following method, including the following steps:

[0032] 1) Mixing mix 1.4 parts by weight of graphite powder with a purity of 99.8 to 99.9% and 28 parts by weight of silicon carbide powder with a purity of 99.8 to 99.9%, and then add 3 parts by weight of zinc stearate and 18 parts by weight of The polyvinyl alcohol is uniformly stirred to obtain a mixture;

[0033] 2) Spray granulation adopts a centrifugal spray dryer to spray and granulate the mixture to obtain granulated powder;

[0034] 3) Hot-press forming Put the prepared granulated powder into a metal mold, use a 500-600T hot-press machine, pressurize and release the pressure 5 times at a temperature of 190°C and a pressure of 45MPa, and obtain a hot-press-formed plate body;

[0035] 4) Humidification and drying Place the formed green body in a humidification and drying equipment, and slowly humidify and dry for 11...

Embodiment 3

[0040] Prepare a silicon carbide ceramic plate with a length×width×thickness of 800mm×600mm×60mm by the following method, including the following steps:

[0041] 1) Mixing After mixing 2 parts by weight of graphite powder with a purity of 99.8 to 99.9% and 30 parts by weight of silicon carbide powder with a purity of 99.8 to 99.9%, add 4 parts by weight of zinc stearate and 20 parts by weight of The polyvinyl alcohol is uniformly stirred to obtain a mixture;

[0042] 2) Spray granulation adopts a centrifugal spray dryer to spray and granulate the mixture to obtain granulated powder;

[0043]3) Hot-press forming Put the prepared granulated powder into a metal mold, use a 500-600T hot press, pressurize and release the pressure under the conditions of a temperature of 200°C and a pressure of 55MPa, and obtain a blank of a hot-pressed forming plate body;

[0044] 4) Humidification and drying Place the formed body in a humidification and drying equipment, and slowly humidify and ...

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
Login to View More

Abstract

The invention discloses a preparation method of a large-sized compact silicon carbide ceramic plate, and relates to the technical field of reaction sintering silicon carbide ceramics. The preparationmethod comprises the steps of mixing raw materials, carrying out spray granulation, carrying out hot-press forming, humidifying and drying, processing, drying at high temperature and carrying out reactive sintering; a super-conventional silicon carbide ratio is used, humidifying and drying are carried out after the spray granulation and the hot-press forming; during the reactive sintering, siliconpowder is added, and an oxygen-free environment is maintained, wherein the adding amount of the silicon powder is 200-300% of the weight of a blank body, so that the sintered silicon carbide ceramicplate is enabled not to crack and to be compact, uniform in density and high in yield; the preparation method overcomes the technical obstacles in a sintering process of large-sized silicon carbide ceramic plates which have the lengths of 600-800mm, the widths of 400-600mm and the thicknesses of 40-60mm, fills the domestic gap, successfully substitutes for imported goods, and lowers the use cost of the application field.

Description

technical field [0001] The invention relates to a method for preparing a silicon carbide ceramic plate, in particular to a method for preparing a large-scale dense silicon carbide ceramic plate with a length of 600-800 mm, a width of 400-600 mm, and a thickness of 40-60 mm, belonging to silicon carbide ceramics technology field. Background technique [0002] Silicon carbide ceramics have excellent characteristics such as high temperature strength, strong oxidation resistance, good wear resistance, good thermal stability, small thermal expansion coefficient, high thermal conductivity, high hardness, thermal shock resistance and chemical corrosion resistance. The performance (strength, creep resistance, etc.) is the best among known ceramic materials, so it has been used more and more widely. role, and has received increasing attention. [0003] According to different industrial fields and different working conditions, silicon carbide materials can be used to make different ...

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): C04B35/565C04B35/65
CPCC04B35/573C04B2235/425C04B2235/428C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/658C04B2235/6581C04B2235/96
Inventor 王明峰亓锡云王明祥石威
Owner WEIFANG HUAMEI FINE TECHN CERAMICS
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com