A tube furnace is a heating device used for laboratory applications, typically employed for heating, drying, baking, sintering, and other operations. It features a tubular heating chamber structure (often constructed from materials such as stainless steel, quartz, silicon carbide, or alumina depending on temperature requirements), internally filled with heating elements, capable of providing a stable heating environment.

The furnace chamber of the tubular furnace adopts ceramic fiber board as the refractory material, which possesses both high-temperature resistance and energy-saving effects. During electric heating, it is more energy-efficient compared to traditional refractory materials. The electricity consumption during insulation is approximately 40% of the design power, and slightly increases to around 70% of the design power under high temperatures (1600-1700℃).

Standard Features:

1. Tube structure: The heating chamber typically adopts a tube structure, usually made of high-temperature resistant materials such as stainless steel, quartz, silicon carbide, or high-purity ceramics. The tube structure helps provide uniform heating and can accommodate samples of different shapes and sizes.

2. Refractory materials: The furnace chamber is lined with ceramic fiber boards as refractory materials, and the outer layer is filled with ceramic fiber blankets or cotton, which not only insulates against high temperatures but also conserves energy.

3. Heating elements: Internal heating elements, usually resistance wires or silicon carbide rods and molybdenum disilicide rods, generate high temperatures to raise the temperature inside the heating chamber to the desired level.

4. Temperature control: The tube furnace is equipped with a temperature control system (temperature controller) to precisely control the temperature inside the heating chamber. This helps achieve precise control over the heating process of the samples.

5. Safety features: Laboratory tube furnaces typically include safety features such as overheat protection and safety door locks to ensure the safety of the experimental process.

6. Gas and vacuum: Tube furnaces typically include one gas inlet and a 4L mechanical vacuum pump under standard conditions. Additional customization can be made for larger vacuum requirements or gas inlet numbers as needed.

7. Vacuum pump selection: Depending on the specific vacuum requirements of the tube furnace, additional customization options such as diffusion pumps or molecular pump units can be provided, with a maximum vacuum degree of up to 0.0001 Pa.

Optional Features:

1.  Furnace chamber opening: Standard tube furnace chambers cannot be opened, but customizable openable chambers facilitate observation of the material entering the tube and offer other advantages. However, it's important to note that tube furnaces heated by molybdenum disilicide rods cannot be opened.

2. Gas inlet number: The number of gas inlets can be customized according to customer requirements, ranging from one to multiple inlets. Standard options include float flow meters, and digital flow meters can also be customized.

3. Gas atmosphere: Tube furnaces can introduce various atmospheres, from standard inert gases to custom gases such as hydrogen or chlorine.

4. Touchscreen control: In addition to standard temperature controller control, touchscreen control can be customized according to different customer needs, offering data visualization and convenient operation, with the ability to download and archive data at any time, eliminating the cumbersome traditional paper recorders.

5. Tilting and rotating: Tube furnaces can be customized with tilting and rotating structures to facilitate customers' control over the sintering process and product processing. Magnetic fluid or rotating seals can be considered under vacuum conditions.

6. Feeding methods: Tube furnaces can be customized with tilting/vibrating feeding methods for continuous processing of products under non-atmospheric and vacuum sintering conditions.

Standard Specifications:

1. The standard specifications of a tube furnace depend on the diameter of the furnace tube and the length of the heating zone. Generally, they can be divided into the following two cases:

   1. When operating at temperatures below 1200°C for extended periods, you can choose either stainless steel or quartz tubes as the furnace tube material. Tube diameters ranging from 30mm to 500mm are customizable, The overall heating zone can be extended through a splicing method, theoretically achieving lengths of several meters or even tens of meters.With each 500mm extension of the heating zone forming an independent temperature zone.

   2. When operating at temperatures above 1200 degrees Celsius, the furnace tube should be made of either silicon carbide or high-purity alumina. Due to limitations in tube size, the maximum diameter achievable is 80mm, with a heating zone length of 1.5 meters (total tube length 2.1 meters).

2. If customers have suggestions for better materials, they are welcome to contact us for further discussion.