High-quality, high-temperature resistant, customizable Silicon Carbide Heating Element

Overview of Silicon Carbide Heating Element

Silicon Carbide Heating Element is an electric heating element with silicon carbide as its main component. It has the advantages of high temperature resistance, oxidation resistance and good thermal stability, and can work stably for a long time in a high temperature environment. At the same time, Silicon Carbide Heating Element also has good mechanical strength and thermal shock resistance, making it less prone to be damaged due to temperature changes, widely used in metallurgy, chemical industry, electronics, and other fields of heating process.

Features of Silicon Carbide Heating Element

Silicon Carbide Heating Element has the following significant features:

High heating efficiency: the resistance value of the silicon carbide heating element is stable, and it can heat up quickly after being energized, converting electric energy into heat energy efficiently, which can effectively shorten the heating time, improve the production efficiency, and reduce the energy loss at the same time.

Strong oxidation resistance: when heated at high temperatures in the air, the surface of the silicon carbide heating element will form a dense layer of silicon dioxide protective film, preventing the internal silicon carbide from being further oxidized, so that it has a longer service life, reducing the frequency of replacement of the heating element and cost.

Good chemical stability: silicon carbide heating element is not easy to react with most chemical substances, in different chemical environments, can maintain stable performance, suitable for a variety of corrosive environments of the heating process.

High mechanical strength: Silicon carbide heating element has good compressive and flexural strength, is not easy to be damaged by external impact or thermal stress, can withstand a certain degree of vibration and shock, easy to install and use.

Good temperature uniformity: Silicon Carbide heating element generates heat uniformly, which can make the heated object obtain a more consistent temperature distribution in a wide range, which is conducive to improving the consistency of product quality.

Specifications Table of Silicon Carbide Heating Element

Specification	Details
Material	Silicon carbide (SiC)
Temperature range	200℃ – 1625℃
Diameter	10mm – 55mm
Hot zone length	Up to 4.2m
Element length	100mm – 6m
Shape	Slot type, U type, SGR type, SG type, M type, ED type, DB type, etc.
Coating	Alkali – resistant coating, A coating, B coating, etc.
Specific gravity	2.6 – 2.8 g/cm³
Bend strength	>300 kg
Hardness	>9 Moh’s
Tensile strength	>150 kg/cm³
Porosity rate	<30%
Radiancy	0.85
Thermal conductivity	14 – 19 W/m·℃ (at 1000℃)
Specific heat	1.0 kJ/kg·℃ (25 – 1300℃)

Play

Applications of Silicon Carbide Heating Element

Silicon Carbide Heating Element has a wide range of applications in many fields due to its excellent performance:

Industrial heating field: In metal heat treatment, Silicon Carbide Heating Element can be used in quenching, tempering, annealing and other processes to provide a precise high-temperature heating environment for metal materials to improve the performance of metals. In ceramic firing process, it can meet the requirements of high temperature sintering, so that the ceramic products achieve the required hardness, density and color. It can also be used in glass melting furnaces to provide stable heat for glass melting and molding to ensure uniformity of glass quality.

Electronic industry: In semiconductor manufacturing, silicon carbide heating elements are used in the annealing and oxidizing process of silicon wafers to provide high-precision temperature control for chip manufacturing and ensure the performance and reliability of semiconductor devices. It can also be used for the aging test of electronic components, simulating high high-temperature working environment, detecting the stability and life of electronic components.

Laboratory research field: as a heating element in high-temperature furnaces to provide high-temperature conditions for research and experiments on various materials, such as research on the synthesis and thermal properties of new materials. It can also be used as a heating component in analytical instruments, such as a graphite furnace in an atomic absorption spectrometer, to provide heat for the atomization of samples.

Other fields: In the petrochemical industry, silicon carbide heating elements are used to heat reaction kettles, pipelines, etc., to promote chemical reactions. In the food processing industry, silicon carbide heating elements are used in baking, drying and other processes to provide a stable heat source for food processing. In the aerospace industry, silicon carbide heating elements can be used to simulate high-temperature environments and test the thermal performance of aviation materials and components.

Company Profile

RBOSCHCO is a trusted global chemical material supplier & manufacturer with over 12 years of experience in providing super high-quality chemicals and Nanomaterials. The company exports to many countries, such as the USA, Canada, Europe, UAE, South Africa, Tanzania, Kenya, Egypt, Nigeria, Cameroon, Uganda, Turkey, Mexico, Azerbaijan, Belgium, Cyprus, Czech Republic, Brazil, Chile, Argentina, Dubai, Japan, Korea, Vietnam, Thailand, Malaysia, Indonesia, Australia, Germany, France, Italy, Portugal etc. As a leading nanotechnology development manufacturer, RBOSCHCO dominates the market. Our professional work team provides perfect solutions to help improve the efficiency of various industries, create value, and easily cope with various challenges. If you are interested, please send an email to sales1@rboschco.com

Payment Term

T/T, Western Union, Paypal, Credit Card etc.

Shipment Term

By air, by sea, by express, as customers request.

5 FAQs of  Silicon Carbide Heating Element

Q1: What is the maximum operating temperature for silicon carbide heating elements?

The maximum operating temperature of silicon carbide heating elements varies depending on the model and process design. Long-term service temperatures of 1450°C to 1500°C are typical for common models, while specially designed elements (e.g., recrystallized silicon carbide) can be operated for short periods of time at 1600°C to 1625°C. The maximum operating temperature of a silicon carbide heating element is 1627°C. It should be noted that at temperatures above 1627°C, the protective film of silica on the surface is destroyed, accelerating oxidation and shortening life. In addition, when used in water vapor or reducing atmosphere (e.g., H₂, CO), the temperature should be controlled below 1000 ℃ to avoid violent reaction leading to component damage.

Q2: How can I extend the service life of silicon carbide heating elements?

Control the surface loading density: too high a loading density will lead to a sudden rise in surface temperature, accelerating the growth of resistance and aging. It is recommended to control the load density at 6- 8W/8W/cm², which should be further reduced under high-temperature environments. Optimize the use environment: Avoid use in environments containing corrosive gases such as sulfur, sodium, boron, etc., and prevent molten metal spattering or alkaline erosion. Choose continuous operation: Intermittent furnaces can damage the protective film of silica due to repeated temperature fluctuations, resulting in shorter life. Continuous operation extends life to 6-8 months, while intermittent use is typically only 3-4 months. Regular maintenance: Inspect element surfaces regularly for cracks or corrosion, clean up any adhesions, and make sure the terminals are making good contact.

Q3: What should I pay attention to when installing silicon carbide heating elements?

Size matching: the length of the heating element should be equal to the width of the furnace chamber, and the cold end part should extend 50-150mm out of the furnace wall to ensure easy heat dissipation and wiring. Avoiding stress: The inner diameter of the furnace hole should be 1.4-1.6 times the outer diameter of the cold end part to prevent the element from breaking when subjected to thermal expansion. The installation should be assisted by a heat-resistant steel pipe to avoid one-sided stress. Wiring method: Priority should be given to the parallel connection to avoid uneven loading due to the series connection. Aluminum braid or aluminum foil should be used to connect the cold end part with the circuit, and make sure the fixture is clamped tightly. Furnace baking treatment: New furnaces or furnaces that have been out of use for a long time need to be baked with old rods or other heat sources first to prevent the components from blowing up due to the rapid temperature rise.

Q4: Can silicon carbide heating elements be used in vacuum or inert gas?

Yes, but the following points should be noted:

Vacuum environment: When the element is used in a vacuum (<10-³ Pa), the maximum temperature can be raised to 1700°C. However, it is necessary to avoid contact with carbon materials to prevent the carbonization reaction. : Inert gas: In nitrogen (N₂), temperatures exceeding 1200 ℃ may react to generate silicon nitride (Si₃N₄); it is recommended to control below 1200 ℃; in argon (Ar) is no such limitation.

Q5: How can I tell if a silicon carbide heating element needs to be replaced?

Replacement is recommended when the resistance has increased to more than 4 times its initial value and the temperature cannot be maintained by voltage regulation. Visible cracks, flaking, or distortion on the surface, affecting heating uniformity. Reddening of the cold end of the element, indicating that the cold end resistance is too high, which may lead to localized overheating