High-purity silicon carbide ceramic vacuum hot pressing sintering process

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In the vast field of modern materials science, high-purity silicon carbide ceramics have become a hot spot in research and application due to their unique properties and wide application prospects. Among them, vacuum hot pressing sintering, as an advanced preparation process, can significantly improve the density and mechanical properties of silicon carbide ceramics, further broadening its application fields.

1.Basic characteristics of high-purity silicon carbide ceramics

Chemical stability: Silicon carbide ceramics have extremely high chemical stability and can remain stable in harsh environments such as acids and alkalis and are not easily corroded.

Mechanical strength: Silicon carbide ceramics have extremely high hardness and bending strength, and can withstand large external forces without being easily broken.

Thermal properties: Silicon carbide ceramics have excellent high temperature resistance and good thermal conductivity, and can maintain stable performance in high temperature environments.

2.Vacuum hot pressing sintering process and its impact on the properties of silicon carbide ceramics

Vacuum hot press sintering is a process in which powder particles undergo plastic deformation, diffusion and recrystallization at high temperatures by applying pressure and heating to form a dense body. For high-purity silicon carbide ceramics, hot-press sintering can significantly improve its density, flexural strength, fracture toughness and other properties. Specifically:

Improved density: During the vacuum hot-pressing sintering process, the powder particles are closely arranged under pressure, reducing the existence of pores, thereby increasing the density of the material.

Enhanced flexural strength: As the density increases, the flexural strength of silicon carbide ceramics is also significantly enhanced and can withstand greater external forces.

Improved fracture toughness: Vacuum hot pressing sintering can also improve the fracture toughness of silicon carbide ceramics, making it less likely to break when impacted or bent.

3.Application fields of vacuum hot pressing sintering of high-purity silicon carbide ceramics

Aerospace field: Because high-purity silicon carbide ceramics have excellent high temperature resistance and mechanical strength, they are widely used in key components such as engine components and combustion chamber linings in the aerospace field.

Electronic industry: High-purity silicon carbide ceramics can also be used to manufacture high-frequency circuit substrates, semiconductor device packaging and other electronic components to meet the electronics industry’s demand for high-performance materials.

Chemical industry: In the chemical industry, high-purity silicon carbide ceramics can be used to manufacture key components such as corrosion-resistant pumps and valves to improve the service life and reliability of equipment.

Energy field: With the development of new energy technology, high-purity silicon carbide ceramics also show broad application prospects in solar panels, fuel cells and other fields.

Vacuum Hot Pressing Furnace

Spec\Model	RVP-3312	RVP-5513	RVP-5518
Working Zone Size (W*H*L)	320*320*1200mm	500*500*1300mm	500*500*1800mm
Max. Weight	250Kg	500Kg	800Kg
Max.Temperature	1800°C	1800°C	1800°C
Temperature uniformity under vacuum	±5°C	±5°C	±5°C
Temperature uniformity under pressure	±7.5°C	±10°C	±10°C
Heating Power	210Kw	300Kw	360Kw
Ultimate Vacuum	2Pa	2Pa	2Pa
Pressure Rising Rate	0.67Pa/h	0.67Pa/h	0.67Pa/h
Working pressure	20/60/100Bar	20/60/100Bar	20/60/100Bar
Process gas	Ar/N2/H2/CH4	Ar/N2/H2/CH4	Ar/N2/H2/CH4
The above specifications are defined according to cemented carbide part. The above parameters can be adjusted to the process requirements, they are not as acceptance standard, the detail spec. will be stated in the technical proposal and agreements.