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[China]
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Address: No. 26, Dongqing Street, High-tech Zone, Zhengzhou ,Henan, China
Contact name:Daniel
HENAN ZG INDUSTRIAL PRODUCTS CO.,LTD |
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Ceramic Thermocouple Protection Tubes
Ceramic Thermocouple Protection Tubes, Excellent thermal conductivity
Thermocouple Protection Tubes (TCPTs) insulate and protect sensitive thermocouples from chemical attack, abrasion, impact damage, or thermal shock. Our Thermocouple Protection Tubes are designed as an immersion device or shield to protect a thermocouple while measuring the temperature of molten metals or gases. High thermal conductivity provides system engineers rapid temperature readings which allow for superior process control. Limitless size and shape capability, tolerance control, and repeatability give assurance to the process engineer that the temperature reading will be consistent.
Our thermocouple protection tubes are available in a wide range of materials suitable for abrasive or corrosive environments as well as molten metal contact. Common materials are mullite, alumina, and a range of silicon carbides like NITRONTM – nitride bonded silicon carbide and OXYTRONTM – oxide bonded silicon carbide. This product is also available in non-wetting materials or with treatments suitable for aluminum applications and copper-based alloys.
In heavy industrial processing of metals and chemicals, process control is vital to an operation. Our customers expect the best ceramic to ensure their temperature readings are accurate and adding no contaminates to the process. Typical application environments include kilns, furnaces, metallurgical and chemical processing. Custom precision silicon carbide shapes and systems are available for any area of the plant that is seeing abrasion, high temperature, or corrosive duty.
| Main component | 99%Al2O3 | S-SiC | ZrO2 | Si3N4 | ||
| Physical Property | Density | g/cm3 | 3.9 | 3.1 | 6 | 3.2 |
| Water Absorption | % | 0 | 0.1 | 0 | 0.1 | |
| Sinter Temperature | °C | 1700 | 2200 | 1500 | 1800 | |
| Mechanical Property | Rockwell Hardness | HV | 1700 | 2200 | 1300 | 1400 |
| Bend Strength | kgf/mm2 | 3500 | 4000 | 9000 | 7000 | |
| Compression Intensity | Kgf/mm2 | 30000 | 20000 | 20000 | 23000 | |
| Thermal Property | Maximum working temperature | °C | 1500 | 1600 | 1300 | 1400 |
| thermal expansion coefficient 0-1000°C | /°C | 8.0*10-6 | 4.1*10-6(0-500°C) | 9.5*10-6 | 2.0*10-6(0-500°C) | |
| 5.2*10-6(500-1000°C) | 4.0*10-6(500-1000°C) | |||||
| Thermal Shock resistance | T(°C) | 200 | 250 | 300 | 400-500 | |
| Thermal Conductivity | W/m.k(25°C | 31 | 100 | 3 | 25 | |
| 300°C) | 16 | 100 | 3 | 25 | ||
| Electrical Property | Resisting rate of Volume | ◎.cm | ||||
| 20°C | >1012 | 106-108 | >1010 | >1011 | ||
| 100°C | 1012-1013 | – | – | >1011 | ||
| 300°C | >1012 | – | – | >1011 | ||
| Insulation Breakdown Intensity | KV/mm | 18 | semiconductor | 9 | 17.7 | |
| Dielectric Constant (1 MHz) | (E) | 10 | – | 29 | 7 | |
| Dielectric Dissipation | (tg o) | 0.4*10-3 | – | – | – | |
Features:
Longer life due to reduced dross buildup
Repeatable and ease of installation
Reliable protection of costly elements
Excellent thermal conductivity
Excellent thermal shock resistance
Protective tubes and covers must meet the following requirements:
mechanical strength;
heat resistance;
fire resistance;
gas impermeability;
corrosion resistance;
chemical inertness;
non-wetting by melts.
Materials for Ceramic Thermocouple Protection Tubes:
Alumina
Mullite
Nitride Bonded Silicon Carbide
Oxide Bonded Silicon Carbide
Reaction Bonded Silicon Carbide
Recrystallized Silicon Carbide
Silicon Nitride
Zirconia
