Introduce the classification of laboratory pyrolysis tube furnace
Laboratory pyrolysis tube furnaces can be classified from different perspectives:
**First, classification by heating method**
1. **Resistance heating tube furnace**:
- Principle: Heat is generated by the resistance wire to heat the furnace tube. The resistance wire is usually wound around a ceramic tube or other insulating material. When the current passes through the resistance wire, the resistance wire heats up and transfers the heat to the furnace tube and the sample inside the tube.
- Features:
- The temperature range is wide, generally ranging from several hundred degrees Celsius to more than one thousand degrees Celsius.
- The temperature control is relatively precise, and the heating rate and temperature can be more accurately controlled by adjusting the current.
- The equipment cost is relatively low, the structure is relatively simple, and the maintenance is relatively easy.
- Application: Suitable for most conventional pyrolysis experiments, such as pyrolysis research on some organic matter, biomass, etc.
2. **Induction heating tube furnace**:
- Principle: The electromagnetic induction principle is used to generate eddy currents in the metal furnace tube, so that the furnace tube itself heats up to heat the sample. It generates an alternating magnetic field through a high-frequency power supply. When the magnetic lines of force in the magnetic field pass through the metal furnace tube, countless small eddy currents are generated inside the furnace tube, causing the furnace tube itself to heat up at a high speed.
- Features:
- Fast heating speed, the furnace tube can be heated to the required temperature in a short time.
- Good temperature uniformity. Since the furnace tube is heated as a whole, the temperature distribution inside the tube is relatively uniform.
- High energy utilization rate. Only the metal furnace tube and the internal sample are heated, which reduces the loss of heat to the surrounding environment.
- Application: Commonly used in experiments with high requirements for temperature uniformity and heating speed, such as pyrolysis and synthesis experiments of some special materials.
3. **Microwave Heating Tube Furnace**:
- Principle: Microwave energy is used to make the polar molecules (such as water molecules) in the sample vibrate rapidly and generate heat, thereby heating the sample. Microwaves are transmitted to the furnace cavity through a waveguide and interact with the sample to produce a thermal effect.
- Features:
- Uniform and fast heating can heat up the inside and outside of the sample at the same time, avoiding the problem of temperature gradient from outside to inside in traditional heating methods.
- Can be heated selectively. Different substances have different microwave absorption abilities. Certain components in the sample can be heated in a targeted manner as needed.
- Energy-saving and efficient. Microwaves can act directly on the sample with less energy loss.
- Application: It is widely used in the preparation of some new materials, rapid pyrolysis of organic matter, and other fields, especially for experiments that require rapid and uniform heating.
**Second, classification by furnace tube material**
1. **Quartz tube furnace**:
- Principle: Quartz tube is used as the furnace tube. Quartz has good heat resistance and chemical stability. It can maintain good physical and chemical properties at high temperatures and is inert to most chemicals.
- Features:
- High transparency, which makes it easy to observe the changes in the sample in the furnace.
- High heat resistance temperature, generally up to more than 1000 degrees Celsius, which can meet the temperature requirements of most laboratory pyrolysis experiments.
- Good chemical stability, not easy to react chemically with the sample, suitable for pyrolysis experiments of many different types of samples.
- Application: It is often used in experiments that require observation of sample appearance, as well as some conventional pyrolysis and chemical reaction experiments, such as pyrolysis of organic matter, heat treatment of materials, etc.
2. **Corundum tube furnace**:
- Principle: The furnace tube is made of corundum material, which has the characteristics of high hardness, high melting point and good insulation performance.
- Features:
- Excellent high temperature resistance, can withstand higher temperatures, generally up to 1600℃ or even higher, suitable for high temperature pyrolysis experiments.
- High mechanical strength, can withstand certain pressure and impact, and is not easy to damage.
- It has good tolerance to chemical substances such as acids and alkalis, and is suitable for pyrolysis experiments in a variety of complex chemical environments.
- Application: It is widely used in some pyrolysis experiments that require high temperature and high strength environments, such as high temperature pyrolysis and synthesis experiments of certain ceramic materials, metal oxides, etc.
3. **Stainless steel tube furnace**:
- Principle: Stainless steel tubes are used as furnace tubes. Stainless steel has good mechanical properties and certain corrosion resistance.
- Features:
- High mechanical strength, the furnace tube is relatively strong and not easy to deform.
- It has good sealing performance, can better prevent gas leakage, and is suitable for some pyrolysis experiments that require a specific atmosphere environment.
- The price is relatively low, and it is easy to process and maintain.
- Application: It is often used in some pyrolysis experiments that require atmosphere and do not require particularly high temperatures. For example, in the pyrolysis reaction of organic matter with the participation of some gases, the good sealing performance of the stainless steel tube furnace can be used to control the atmosphere.
**Three, classification by temperature range**
1. **Low-temperature tube furnace (<600℃)**:
- Features:
- Temperature control is relatively simple, and the requirements for heat insulation and heat dissipation of the equipment are relatively low.
- Generally suitable for some low-temperature pyrolysis experiments, such as low-temperature decomposition research of certain organic matter, low-temperature drying and pretreatment of materials, etc.
- Application: For example, in the low-temperature drying process of some biological samples, the low-temperature tube furnace can slowly remove moisture from the sample at a lower temperature while keeping the structure and composition of the sample intact.
2. **Medium-temperature tube furnace (600℃ - 1200℃)**:
- Features:
- It can meet the temperature requirements of most conventional pyrolysis experiments, and the temperature control accuracy requirements are relatively high.
- The heating elements and insulation materials of the equipment need to have good performance to ensure uniform and stable temperature in the furnace.
- Application: Widely used in experiments such as pyrolysis and calcination of various materials, such as pyrolysis treatment of ceramic materials before medium-temperature sintering, medium-temperature decomposition research of certain metal compounds, etc.
3. **High-temperature tube furnace (＞1200℃)**:
- Features:
- Special heating elements and high-temperature resistant materials are required, such as tungsten wire, molybdenum wire, etc. as heating elements, and graphite felt, etc. as insulation materials.
- High requirements are placed on the structure and manufacturing process of the equipment to ensure the safety and stability of the equipment at high temperatures.
- Temperature control is difficult, and advanced temperature control systems are usually required.
- Application: Mainly used for high-temperature pyrolysis and synthesis experiments of some special materials, such as high-temperature sintering and pyrolysis of high-melting-point metals and ceramic materials. For example, when preparing certain high-performance ceramic materials, it is necessary to carry out pyrolysis and sintering processes in a high-temperature tube furnace to obtain the required material properties.
English
简体中文
Русский язык
Français
日本語
한국어
Português
Español
Position:
E-mail:
Tell:
Whatapp:
Address:Room 1505, Building 9, No. 26 Dongqing Street, Zhengzhou High-tech Industrial Development Zone
Website navigation
