Zhengzhou Runda Heating Element Co.,Ltd.

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Type DB Silicon Carbide Rod

Silicon carbide heating elements are rod-shaped non-metallic high-temperature heating elements made from high-quality green silicon carbide as the main raw material, processed through embryo making, high-temperature silicification, and recrystallization. Compared to metal heating elements, these elements feature high operating temperature, oxidation resistance, corrosion resistance, long lifespan, minimal deformation, and convenient installation and maintenance. Therefore, they are widely used in various high-temperature electric furnaces and other electric heating equipment for magnetic materials, powder metallurgy, ceramics, glass, and more.

Category:

SiC Heating Element

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Details

DB(rod)type elements

Type:DB

Diameter:Dl/D2,mm

Hot zone length:HZ,mm

Cold Zone length:Cz,mm

Overall length:OL,mm

Physical properties of silicon carbide heating elements:

The linear expansion coefficient, thermal conductivity, and specific heat of silicon carbide heating elements vary with temperature, and the relevant data are as follows:

Temperature (℃)	Linear expansion coefficient（10-6m/℃）	Heat conductivity（Kcal/M hr℃）	Specific heat (cal/g℃）
0	/	1	0.148
300	3.8	/	/
400	/	/	0.255
600	4.3	14-18	/
800	/	/	0.294
900	4.5	/	/
1100	/	12-16	/
1200	4.8	/	0.325
1300	/	10-14	/
1500	5.2	/	/

1. Oxidation resistance of components:

The component begins to oxidize when used in air at 800℃. When the temperature reaches 1000-1300℃, a protective layer of silicon dioxide forms on the surface of the heating part. At 1300℃, cristobalite crystallizes. At 1500℃, the protective layer reaches a certain thickness, significantly slowing down the oxidation rate of the component and stabilizing it. If the temperature continues to rise above 1627℃, the protective layer is damaged, leading to a significant increase in the oxidation rate and premature failure of the component.

2. The impact of alkali and alkaline metal oxides on components:

At around 1300℃, alkali and alkaline metal oxides react with silicon carbide, forming silicates, a process known as alkali-chemical attack, which significantly affects the red-hot degree of component heating.

3. The impact of molten metal on components

Some metals, such as cobalt, nickel, and chromium, can erode components when melted at high temperatures, affecting their lifespan.

Application

Optical Glass

They ensure high thermal efficiency, producing consistent quality in lenses, prisms, and other glass components, while minimizing defects and reducing maintenance costs through stable, long-term performance.

Specialty Ceramics

They deliver uniform heating to enhance strength and durability, reduce defects, and ensure production stability, providing a reliable solution for high-performance ceramic applications.

Lithium Battery Materials

They improve material consistency, increase production efficiency by shortening sintering cycles, and provide durable, high-temperature stability to meet the exacting standards of the battery industry.

Aerospace

Designed for lightweight and durable thermal protection, they ensure engine components withstand extreme temperatures and mechanical stress, offering long-lasting reliability and meeting the rigorous demands of the aerospace industry.

Semiconductor Manufacturing

They ensure exceptional thermal stability and consistency, minimizing defects in silicon wafers and other semiconductor materials, while their durability supports high-throughput production, helping manufacturers achieve superior quality and efficiency in cleanroom environments.

Electronics Manufacturing

Capable of reaching temperatures up to 1850°C, they offer uniform heating to enhance the precision and durability of electronic components, reducing thermal stress and improving yield rates, all while ensuring long-term stability to meet the demanding standards of the electronics industry.

Photovoltaic Industry

They provide uniform heating to ensure consistent crystal quality, enhancing the efficiency of solar cells while reducing energy waste, and their robust design supports long-term stability, helping manufacturers achieve higher yields and sustainable production.

Metallurgical Industry

They ensure uniform temperature distribution to improve material strength and quality, while their exceptional durability withstands harsh conditions, enabling efficient and consistent production in demanding metallurgical environments.

Advantage

Product Quality

Committed to providing high-performance and reliable high-temperature electric heating elements for high-temperature kilns such as ceramics, glass, and refractory materials.

OEM Customised Service

We provide customized designs to meet the specific needs of our customers, enabling personalized customization and efficient production of our products.

Advanced Technology

With advanced production equipment, rigorous quality control system, and professional production technology team, we always prioritize product quality, service life, and stability.

Global Market

We are willing to work hand in hand with domestic and foreign customers to become your trusted partner for high-temperature furnace component solutions.

Service

A comprehensive service system to safeguard you

12 months

Restless Year Round

24 hours

Hotline

365 days

Restless Year Round

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Contact Number

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8613938469990

info@rundaheater.com

+86-15225065656 +86-13938469990

+86-371-62737311

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