Silicon Carbide (SiC) Heating Elements for High Temperature Furnace

• Certification: Factory Certification
• Type: Heater
• Material: Silicon Carbide
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: jx0001
• Form: Tube
• Shape: Tube
• Install: Easy
• Maintain: Easy
• Life: Long
• Temperature: High
• Stability: Good
• Transport Package: Polywood Case
• Specification: 8~60
• Trademark: JIAXIN
• Origin: China
• HS Code: 69039000
• Production Capacity: 5000000
• Package Size: 80.00cm * 60.00cm * 40.00cm
• Package Gross Weight: 15.000kg

Product Description

Silicon Carbide (SiC) heating elements is a non-metal electric heating element made from SiC as its main raw materials.  It has some specific properties, such as low expansion coefficient, little deformation, stable chemical property, long service life, easy installation and maintenance, etc.

Silicon Carbide (SiC) heating elements can usually make use for furnace which temperature from 600degree celsius-1600.degree celsius It can be directly used in an air atmosphere without any protection atmosphere. It is extensively used in the fields of metallurgy, ceramics, glass, machinery, analysis test, semiconductor, science & research and so on

 

Advantages

 

1. High working temperature: 1500C (Surface Temperature)

2. Various shapes: Rod, U, W, Single Spiral, Doule Spiral shapes are availible.

3. Large size range: Diameter 14-54mm, Length 200-4500mm.

4. Fast Delivery:  Normal quantity can be ready in 10 days.

5. Very competitive prices.

 

Product Parameters

Physical Property
 

Specific Gravity	2.6~2.8g/cm3	Bend Strength	>300kg
Hardness	>9MOH'S	Tensile Strength	>150Kg.cm3
Porosity Rate	<30%	Radiancy	0.85

Chemistry Property

1.Antioxidation Property of Elements
The element start to being oxidized when heat to 800°C in air, and a SiO2 protect film will be generated in surface of hot zone when temperature get to 1000-1300°C ; cristobalite will be crystallized at 1300°C; the protect film get to a certain thickness when the temperature get go 1500°C which make the oxidation speed being very slowly to stable. if continue to heat to over 1627°C ,the protect film will be damaged and oxidation speed will be more rapid evidently and make the element damaged earlier.
Thought the element will be oxidized very slowly in course of application, it also will make the resistance increased following long time application, this phenonenon calls ageing , in order to lower the ageing speed, we use special technology to spread a protect film on the surface of hot zone in the course of production, which enhance the antioxidant property of element evidently and lengthen the service life.

2.The effects of alkali and alkaline metal oxide to elements.
The alkali and alkaline metal oxide will react with SiC at about 1300°C and generate silicate, which calls alkali-chemical corrosion, and can influence the glowing of element. 

Electric Property
SIC heating elements has rather large specific resistance , when it is heated in air and the surface temperature of the hot zone reaches 1050ºC, it's resistance rate is 600-1400 mm2/mm (square millimetre , its resistance value changes as the temperature rises. From room-temperature to 800ºC is negative value , over 800ºC is positive value nature curve. 


 

Product Specification

 

SiC heating elements Standard Sizes .

Diameter	Heating zone Length	Cold zone Length	Overall length	Range of resistance
14mm	100-500mm	150-350mm	400-1200mm	0.7-5.6 ohms
16mm	200-600mm	150-350mm	500-1600mm	0.7-4.4 ohms
18mm	200-800mm	150-400mm	500-1600mm	0.7-5.8 ohms
20mm	200-800mm	200-600mm	600-2000mm	0.6-6.0 ohms
25mm	200-1200mm	250-700mm	700-2600mm	0.4-5.0 ohms
30mm	300-2000mm	250-800mm	800-3600mm	0.4-4.0 ohms
35mm	400-2000mm	250-800mm	900-3600mm	0.5-3.6 ohms
40mm	500-2700mm	250-800mm	1000-4300mm	0.5-3.4 ohms
45mm	500-3000mm	250-750mm	1000-4500mm	0.3-3.0 ohms
50mm	600-2500mm	300-750mm	1200-4000mm	0.3-2.5 ohms
54mm	600-2500mm	300-750mm	1200-4000mm	0.3-3.0 ohms

Other sized SiC elements can be made according to your need!

 

How to Order  SiC heating element

1. Choose the shape you need, like Rod, U, W, Single Spiral etc.

2. Out Diameter (OD)

3. Heating Zone Lengh (HZ)

4. Overall Length (OL)

5. Resistance you need.

Order Sample: Rod type, OD30mm, HZ300mm, OL800mm, Resistance 0.4ohms.

SiC heating element is widely used in high temperatue furnaces, It can be used in air, vacuum and other protection gase enviroments.

 

Installation Instructions

Matters needing attention

1, silicon carbon rod texture is hard and brittle, subject to violent vibration and impact easy to break. Therefore, transport should be extra careful, handling should be handled lightly.
2. The length of the heating part of the silicon carbon rod should be equal to the width of the furnace. If the heating part extends into the furnace wall, it is easy to burn the furnace wall.
3, the length of the cold end of the silicon carbon rod should be equal to the thickness of the furnace wall plus the length of the cold end of the furnace wall. Generally, the extension length of the cold end is 50 ~ 150mm to cool the cold end and connect the fixture.
4, the inner diameter of the furnace through the silicon carbon rod should be 1.4 to 1.6 times the outer diameter of the cold end, the furnace hole is too small or the hole stuffing is too tight, high temperature will hinder the silicon carbon rod free expansion and lead to broken rod. When installed, the silicon carbide rod should be able to freely rotate 360 degrees.
5, the distance between the silicon carbon rod and the heated material and the furnace wall should be greater than or equal to 3 times the diameter of the heating part. The center distance between the silicon carbon rod and the silicon carbon rod should not be less than 4 times the diameter of the heating part.
6. The cold end of the silicon carbon rod is connected with the main circuit with aluminum braid or aluminum foil. Clamp the cold end tightly.
7. New furnaces or electric furnaces that are not used for a long time should be oiled before use, and old rods or other heat sources should be used.
8, silicon carbon rod storage to prevent moisture. Because it is easy to decompose and fall off the cold end aluminum layer after being damp, the contact resistance between the cold end and the fixture increases, and the silicon carbon rod is easy to crack after being energized.
9, silicon carbon rod before use to carry out resistance. Silicon carbon rods with the same or similar resistance values are first connected together.
10. Equipped with pressure regulating device for silicon carbon rod. The initial voltage is half of its normal operating voltage, and the voltage is gradually increased after a period of stability. In this way, the silicon carbon rod will not be caused by rapid heating and fracture.
11. Long continuous service life of silicon carbon rod; Short intermittent service life.
12, the use of silicon carbon rod to choose a reasonable surface load density and use temperature. Service temperature
 

 

Detailed Photos

 

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About Us

1. Our company is a high & new technology enterprise specially engaged in developing, manufacturing and selling SiC (silicon carbide) heating elements and  Molybdenum disilicide (Mosi2) heating elements and silicon carbide protective pipes

2. It established in the year 2007, with more than 16 years experience for produciton.

3. Products are exported to USA, Germany, France, Poland, Spain,Turkey, Russia, Ukraine, Japan, Korea, Singapore, Vietnam, Thailand and Iran, etc.. They are highly approved by our customers all over the world.