Products Thermal Equipment Vacuum Furnace Molybdenum Vacuum furnace
Molybdenum Vacuum furnace

Vacuum Furnace

Molybdenum Vacuum furnace

Item Number : KT-VM

Price varies based on specs and customizations


Max. temperature
1400 ℃
Constant work temperature
1300 ℃
Heating rate
0-10 ℃/min
Effective volume
4.5-253 L
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Introduction

A molybdenum vacuum furnace is a type of high-temperature heat treatment equipment used in various industrial applications. It utilizes molybdenum foil as a heating element and provides a vacuum environment to prevent contamination of the heated materials. This furnace exhibits high-temperature stability, excellent vacuum performance, efficient heat transfer, and high durability. It is commonly employed in fields such as vacuum sintering and vacuum brazing, where high-purity and vacuum requirements are crucial.

Applications

The molybdenum vacuum furnace finds applications in various fields, including:

  • Vacuum sintering
  • Vacuum brazing
  • Sapphire crystal growth
  • Special brazing
  • Heat treatment
  • Casting aircraft components
  • Refining high purity metals and alloys
  • Electrodes for remelting
  • Powder roasting
  • Ceramic sintering
  • High-temperature experiments
  • Material treatment
  • High-temperature atmosphere sintering
  • Ceramic glue discharge
  • Flue gas treatment
  • Annealing and sintering

Detail & Parts

Molybdenum plate of heat insulation material in vacuum furnace

Molybdenum plate of heat insulation material in vacuum furnace
Molybdenum plate of heat insulation material in vacuum furnace
Molybdenum plate of heat insulation material in vacuum furnace

Small thermal expansion;High melting point;High thermal conductivity.

Features 

The molybdenum foil vacuum furnace provides various benefits that cater to specific customer needs:

  • High-temperature stability: Guarantees consistent heating temperatures for reliable heat treatment processes, even under demanding conditions.
  • Excellent vacuum performance: Maintains a high vacuum level and prevents contamination, ensuring the integrity of heated materials.
  • Efficient heat transfer: Facilitates faster heating rates and improved thermal uniformity, enhancing process efficiency.
  • High durability: Resists high temperatures and oxidation, ensuring prolonged usage without performance degradation.

Principle

The molybdenum vacuum furnace utilizes the high-temperature resistance and excellent vacuum performance of molybdenum foil as the heating element and furnace liner. It operates by creating a high-temperature vacuum environment through resistive heating of the molybdenum foil, which effectively isolates the heated materials from external contaminants and enables precise temperature control. This unique design allows for high-temperature heat treatment processes in a clean and controlled atmosphere, making it ideal for applications such as vacuum sintering and vacuum brazing.

Advantages

  • High-temperature stability: The molybdenum foil vacuum furnace exhibits remarkable temperature stability, maintaining a consistent heating temperature and ensuring a reliable heat treatment process under high-temperature conditions.
  • Excellent vacuum performance: The molybdenum foil material possesses exceptional sealability and corrosion resistance, enabling the furnace to maintain a high vacuum level and prevent contamination of the heated materials.
  • Efficient heat transfer: Utilizing molybdenum foil material, the vacuum furnace facilitates efficient heat transfer, resulting in faster heating rates and improved thermal uniformity.
  • High durability: The molybdenum foil material exhibits excellent resistance to high temperatures and oxidation, allowing for prolonged usage at elevated temperatures without failure.

Safety Advantage

  • Kindle Tech vacuum furnace owns over current protection, over temperature alarming function, furnace will turn off the power automatically
  • Furnace build in thermal couple detecting function, furnace will stop heating and alarm will be on once broken or failure detected
  • Power failure restarting function,furnace will resume the furnace heating program when power is incoming after failure

Technical specifications

Furnace model KT-VM
Max. temperature 1400 ℃
Constant work temperature 1300 ℃
Chamber insulation material molybdenum heat shied  
Heating element Molybdenum Strip
Heating rate 0-10℃/min
Temperature sensor Build in S type thermal couple
Temperature controller Touch screen PID controller with PLC
Temperature control accuracy ±1℃
Temperature uniformity ±5℃
Electric power supply AC110-440V,50/60HZ
Standard Chamber Sizes Stocks
Chamber size  (mm) Effective volume  (L) Chamber size  (mm) Effective volume  (L)
150x150x200 4.5 400x400x500 80
200x200x300 12 500x500x600 125
300x300x400 36 600x600x700 253
Customer design sizes and volume is accepted

Optional Setup

  • Independent furnace temperature monitoring and recording
  • RS 485 communication port for PC remote control and data exporting
  • Optional pneumatic vacuum valve linkage with temperature controller
  • Touch screen temperature controller with versatile operator friendly functions
  • Cold water circulation cooling machine for furnace shell jacket cooling system

Precautions and maintenance

The molybdenum foil vacuum furnace consists of key components such as the furnace chamber, molybdenum strips, vacuum gauge, vacuum system, and water cooler. The following precautions and maintenance guidelines should be observed:

Furnace Chamber
  • Regularly inspect the chamber’s interior surface for brightness.
  • Ensure dryness and cleanliness inside the chamber to prevent oxidation and product contamination.
  • Avoid rapid heating rates that may cause thermal expansion deformation of the insulation screen.
  • Verify the leak rate and ultimate vacuum before initiating heating.
  • Maintain a vacuum in the chamber when not in use, and perform chamber baking if volatiles are present.
  • Implement a slower heating rate during high-temperature stages.
Molybdenum Strips Heater
  • Molybdenum Strips Heater
  • Take care not to drop objects onto the molybdenum strips when removing products, as it may cause breakage.
  • Prevent low-melting point iron-containing products from volatilizing onto the molybdenum strips, as it can lead to strip melting and breakage over time.
  • Securely hold the product with both hands or appropriate tools when taking it out.
  • Strictly control the impurity content in the product.
Pirani Gauge and Ionisation Gauge
  • Adhere to safety regulations for electrical equipment when operating and maintaining pirani gauges.
  • Avoid forcibly disassembling the gauge tubes while the furnace is under vacuum.
  • Do not pressurize the gauge (above 0.05Pa); if necessary, turn off the gauge power.
  • Refrain from introducing corrosive gas atmospheres.
  • Calibrate the vacuum gauge with dry air or nitrogen, as other atmospheres may cause measurement deviations.
  • Avoid turning on the ionization gauge under atmospheric pressure, as it may result in damage.
  • Clean the seals and contact surfaces with acetone or alcohol when disassembling, and apply vacuum grease before reassembling.
  • Perform zero point and full-scale calibration for the first use or after a period of use to match the vacuum and pirani gauges.
Mechanical Pump
  • Ensure the pump temperature does not exceed 45 degrees to prevent non-wear of the pump cavity and detrimental effects on the vacuum.
  • Monitor the oil color in the oil window regularly.
  • Check for oil splashing from the exhaust when starting the vacuum pump, and inspect the oil level.
  • Measure the pump temperature before and during operation, and monitor the cooling water temperature.
  • Change the oil every three months (model: HFV-100).
  • If the oil level is high, open the drain valve to lower it to the standard level.
Roots Pump
  • Maintain cleanliness inside the pump cavity.
  • Monitor the quality of pump oil.
  • Ensure proper pump rotation.
  • Avoid placing products with high moisture or large particles in the furnace chamber.
  • Promptly replace the diffusion pump oil if it becomes discolored or emulsified.
  • Immediately contact the manufacturer if any abnormal conditions occur with the pump.
Diffusion Pump
  • Check if the diffuser oil in the oil window requires replacement.
  • Monitor the pumping speed after starting.
  • Ensure adequate cooling water supply to the pump.
  • Replace the diffusion pump oil with the appropriate model (HFV-3).
  • Verify that the heater temperature, oil level, and pump core installation are normal.
  • Maintain the pump surface temperature between 10-35 degrees Celsius and humidity below 65%.
Water Cooler
  • Thoroughly read the manual before operating the water cooler.
  • Pay attention to the rotation directions of the inlet and outlet water pumps.
  • Confirm that the furnace water inlet pressure is displayed correctly after starting.
  • Establish an effective heat dissipation system.
  • Regularly check the water quality inside the water tank.
  • Clean the heat dissipation system every 3-5 months.
  • Avoid overloading the set temperature; for example, if the set temperature is 20 degrees, it should not go below 21 degrees. Adjust the set point above 21 degrees.
  • Ensure proper ventilation for the cooler’s placement.
  • Occasionally open the side cover and clean the inside water tank with diluted hydrochloric acid.

In summary, the molybdenum foil vacuum furnace is an efficient, stable, durable, and safe device. However, it requires regular vacuum maintenance, safe operation, and diligent maintenance practices to ensure its long-term stable operation.

Warnings

Operator safety is the top important issue! Please operate the equipment with cautions. Working with inflammable& explosive or toxic gases is very dangerous, operators must take all necessary precautions before starting the equipment. Working with positive pressure inside the reactors or chambers is dangerous, operator must fellow the safety procedures strictly. Extra caution must also be taken when operating with air-reactive materials, especially under vacuum. A leak can draw air into the apparatus and cause a violent reaction to occur.

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Would you please drop your ideas to us, our engineers are ready for you now!

FAQ

What is a vacuum furnace used for?

A vacuum furnace is used for high-temperature processing of materials in a controlled environment without any contamination. It operates by surrounding the product with a vacuum, which prevents oxidation and heat loss from the product through convection. This furnace is commonly used for heat treatment of steel alloys at temperatures below 1200 °C. High-temperature vacuum furnaces can reach temperatures up to 3000°C and are used for industrial processes such as sintering, brazing, annealing, and heat treatment with high consistency and low contamination. The ability to achieve uniform heating across the entire workpiece is a key benefit of using a high-temperature vacuum furnace.

What is the process of a vacuum furnace?

The process of a vacuum furnace involves loading the parts into the chamber and creating a vacuum inside it by utilizing a vacuum pump. The next step is to heat the parts using temperature controls, which can reach between 1,500 and 5,400 degrees Fahrenheit. This process eliminates the possibility of oxidation and contamination, resulting in a higher purity end product. After heating, the parts are cooled and finished before being removed from the vacuum furnace. The furnace consists of various components, including the vacuum system, furnace shell, electric heating element, temperature controls, power supply system, and transport apparatus.

What gas is used in a vacuum furnace?

Different gases can be used in a vacuum furnace depending on the application. In general, vacuum furnaces can work with gases or mixtures such as Argon, Nitrogen, Hydrogen, Carbon Monoxide, Helium, among others. The use of these gases allows for heat treatment in a defined, mostly non-oxidizing atmosphere, which is required for various applications such as vacuum soldering and brazing, vacuum annealing, and sintering. Additionally, it is possible to work with a defined oxygen concentration that is different from the air composition.

What is the heating element used in a vacuum furnace?

The heating element in a vacuum furnace is critical to its proper functioning, and is dependent on factors such as maximum operating temperature, power load, partial pressure and quench gases, and life expectancy. Vacuum furnaces are heated by electric resistance elements made from a variety of materials, including high-temperature metallic alloys such as stainless steel, nickel-chromium, molybdenum, tungsten, tantalum, or of non-metallic materials such as graphite and silicon carbide. The choice of material for the heating element is important in maximizing its longevity, reliability, efficiency, and ultimately the process results.
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The molybdenum vacuum furnace from KINTEK SOLUTION is a game-changer for our laboratory. It's efficient, precise, and incredibly durable.

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4.7

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Anika Nguyen

4.8

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The molybdenum vacuum furnace from KINTEK SOLUTION is a top-notch piece of equipment. It's well-built, easy to operate, and delivers exceptional performance.

Lucas Brandt

4.9

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We recently upgraded to the molybdenum vacuum furnace from KINTEK SOLUTION, and we're thrilled with the results. It's faster, more efficient, and produces better-quality products.

Isabella Patel

4.7

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The KINTEK SOLUTION molybdenum vacuum furnace is a great choice for labs that demand precision and reliability. It's a well-made, high-quality product that delivers consistent results.

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4.8

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We've been using the molybdenum vacuum furnace for several months now, and it's exceeded our expectations. It's easy to use, maintains temperature accurately, and produces high-quality results.

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4.9

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The molybdenum vacuum furnace from KINTEK SOLUTION is a fantastic addition to our lab. It's user-friendly, efficient, and produces excellent results. We highly recommend it.

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4.7

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We're very impressed with the molybdenum vacuum furnace from KINTEK SOLUTION. It's a well-built, reliable piece of equipment that delivers exceptional performance.

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4.8

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The molybdenum vacuum furnace from KINTEK SOLUTION is a great investment for any lab. It's efficient, accurate, and produces high-quality results. We're very happy with our purchase.

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