ABOUT
Microwave Furnaces
Introduction
Microwave furnaces are a type of specialised heating equipment which generates their heat through electromagnetic radiation in the microwave region of the electromagnetic spectrum (2.45 GHz). This is achieved through dielectric heating where the microwave energy penetrates the dielectric material and causes the dielectric molecules to vibrate. Microwaves generate heat internally by rapidly vibrating the molecules, immediately creating heat. This more advanced technology has a number of advantages over conventional electric furnaces; including higher energy efficiency, shorter heating cycles, and better temperature uniformity. Tempsens Instruments is the leading microwave furnace manufacturer, manufactures advanced microwave heating systems that can heat materials up to 1600°C, and are therefore suitable for materials processing, sintering, calcination and semiconductor manufacturing in laboratory and industrial environments.
About Microwave Furnaces
Working Principle Of Microwave Furnace
The microwave furnace principle is based on dielectric heating. A microwave furnace uses magnetrons to emit electromagnetic waves to the furnace chamber at a frequency of 2.45 Gigahertz. The microwaves penetrate the dielectric materials in the chamber and excite the polar molecules to oscillate rapidly, producing heat through friction. This heating method is known as volumetric heating because it heats the entire part of the piece rather than just being in contact with the heating element. Hence, the speed of heating, the energy efficiency of heating, and the ability to achieve uniform temperature distribution throughout the sample are much higher than with a conventional heating method and there is no need for the piece being heated to be in contact with the heating element.
Microwave Furnace Feature
- Rapid Heating Technology – Rapidly heat samples directly by exciting the molecules with high-frequency 2.45 GHz magnetron.
- Energy-Efficient Operation – The microwave furnace provides superior energy efficiency because the material is being heated, not the surrounding environment.
- Precision Temperature Control – The microwave furnace is equipped with a Eurotherm microprocessor controlled PID programmer and an infrared non-contact pyrometer, providing accuracy of +/- 2 degrees Celsius.
- High Temperature Range Capability – The microwave furnace operates up to 1200 degrees Celsius or can be configured for advanced applications at 1600 degrees Celsius.
- Even heating: Even heating in the unit allows for very consistent temperature distribution in the chamber giving consistently repeatable results.
- Magnetron System: There are two (2), 900 watt magnetrons creating a total output of 1800 watts of power delivered to the chamber for efficient heating.
- Construction: The main chamber is made from stainless steel, SS316 grade, with a high-quality mild steel (MS) constructed body and the exterior is finished with powder coating paint.
- Heating Rates: The programmable heating rate feature allows for creating and utilizing customizable heating profiles for specific materials being processed.
- Controlled Atmosphere: This unit has the capability of doing gas purging applications (Ar, N2, O2, H2, CO) with the addition of stainless steel fittings and needle valves.
- Space Efficient Design: The compact design of this machine takes very little space on the shop floor and it has an added convenience of an integrated control panel box.
- Door Interlock Safety: A limit switch is used to automatically turn off the heating element when the door is opened.
- Ambient Temperatures: Water and air-cooling options can be added to reduce the outside surface temperatures of this unit to near ambient conditions.
Microwave Furnace Applications
- Dielectrics: Efficiency in processing ceramic, oxide, and composite dielectric materials
- Rapid Densification by Sintering Operations: Densification of powdered metal components and ceramic products at a faster rate with improved characteristics
- Calcination: Thermal decomposition of various materials for the creation of oxide products or the restructuring of material
- Drying: Fast evaporation of moisture from samples through uniform heating
- Pasteurizing and Sterilizing: Using controlled heating for food and pharmaceutical processing and sterilizing medical instruments
- Semiconductors: The processing of highly precision electronic components using this technology
- Glass: Provides more efficient melting and heating processes for glass applications.
Why Tempsens is the Best Microwave Furnace Manufacturer?
- Offer three decades of experience within the temperature and thermal industry.
- Eurotherm provides both the PID programming function, as well as digital indicators.
- Designed for durability with premium-grade SS316 chambers and insulation materials manufactured overseas.
- Globally certified to ISO9001:2015, ISO14001:2015, and ISO45001:2018; our company operates in India, Germany, Indonesia and UAE.
- Custom developed solutions with fast response times, superior quality and built to meet individual customer application specifications.
FAQ
Frequently Asked Questions
Find answers to frequently asked questions related to Microwave Furnaces.
Microwave heating uses 2.45 GHz Electromagnetic radiation to create oscillating molecules that provide heat energy within the material. Electric ovens (wire electrical conductive heating methods such as resistance) rely on heating the outside of the object using conduction and convection. Therefore, microwave heating is faster and more efficient than traditional electric heating methods.
To protect themselves from exposure to microwave radiation when operating the microwave furnace, operators must wear thermal protection gloves, safety glasses and heat-resistant clothing; make sure that the door interlock functions correctly; and, never operate the furnace when it has damaged seals.
