What vacuum pumps are used in vacuum ceramic sintering furnaces?

When selecting a vacuum pump for a vacuum ceramic sintering furnace, factors such as specific sintering process requirements, required vacuum degree, pumping speed, reliability, maintenance costs, and working environment are usually considered comprehensively. Here are some commonly used types of vacuum pumps and their characteristics:

Roots vacuum pump:
Widely used: It is widely used in ceramic sintering and can meet the requirements of quickly establishing a vacuum environment for ceramic sintering.
Stable pumping performance: It has stable pumping performance in the medium to high vacuum range and can be used in conjunction with other types of vacuum pumps to form a vacuum unit, further improving the vacuum degree.
Not sensitive to impurities: Not sensitive to dust, fibers, and other impurities contained in the gas, suitable for environments with small particles that may be generated during ceramic sintering processes.
Need to cooperate with the front stage pump: When used alone, it cannot directly obtain high vacuum and needs to be combined with the front stage pump.
Cooling is required: During operation, a certain amount of heat is generated and needs to be cooled.
Rotary vane vacuum pump:
Low cost: If considering cost and ease of operation, rotary vane vacuum pumps can be chosen.
Provide high vacuum degree and high pumping rate: Seal various working clearances through the circulation flow of oil, while also providing cooling and lubrication effects.
Regular maintenance is required, such as replacing oil and filters, to ensure performance.
Water ring vacuum pump:
Handling gases containing water vapor: If it is necessary to handle gases containing water vapor, a water ring vacuum pump can be considered.
Dry vacuum pump:
High cleanliness: If high cleanliness is required, dry vacuum pumps such as dry screw vacuum pumps are preferred. This pump has the advantages of no oil pollution, low noise, and low vibration.
Diffusion pump:
High vacuum degree: It can achieve extremely high vacuum degree, but the pumping rate is relatively low and requires preheating time, usually used in high vacuum fields.
Molecular vacuum pump:
Low ultimate pressure: It has the advantages of low ultimate pressure and fast pumping speed, especially suitable for applications in high vacuum fields. But it is more sensitive to gas types and temperatures, and has a higher price.
In summary, the selection of vacuum pumps for vacuum ceramic sintering furnaces needs to be comprehensively considered based on specific needs. Different types of vacuum pumps play their respective advantages and roles in different application scenarios.