The alumina protective sleeve，with its outstanding thermal shock resistance and high hardness, ensures an extremely long service life under conditions of rapid cooling and heating as well as mechanical wear. As a key component for precise temperature measurement, it guarantees the reliable and stable transmission of thermocouple signals, making it an ideal choice for achieving safe, accurate and reliable temperature measurement in metallurgy, chemical industry, semiconductors and various high-temperature industrial kilns.
Product Properties
Downloads & Resources
| Resource Type | Link |
|---|---|
| Safety Data Sheet (SDS) | 99% Alumina MSDS-Innovacera |
| Technical Data Sheet (TDS) | INNO-99% Alumina Ceramic Material Properties-SU0627 |
Product Details
High-purity corundum products have an alumina content of ≥ 99.7%. As a protective tube for thermocouples, they are widely used in high-temperature measurement devices and are suitable for harsh working conditions with high temperatures.
They are mainly applied in industries such as single-crystal silicon, polycrystalline silicon ingot furnaces, petrochemicals, semiconductors, corona machines, and steel, and are also used as reference materials in the fields of heat treatment equipment and scientific analysis instruments, etc.
The corundum protective tube has excellent properties: it can withstand a firing temperature of up to 1800°C, has high mechanical strength and sealing performance, and has excellent resistance to chemical corrosion. It can be applied in hydrogen and other reducing atmospheres under very high working temperatures.
Advantages:
- Using extrusion molding, the dimensions are uniform – better than injection molding.
- Excellent high-temperature resistance – extends the service life of thermocouples.
- Quick delivery and customized production for customers – saves inventory costs for customers.
Applications:
Selection of protective tubes for industrial kiln furnace temperature monitoring system
Design of temperature measurement device for high-temperature reactors in petrochemical plants
Detection of tube wall temperature of boilers in thermal power generating units
Frequently Asked Questions
Alumina (chemical formula: Al₂O₃) is an inorganic compound composed of aluminum and oxygen elements. It is the most stable form of aluminum in Earth’s crust. It is one of the most abundant oxide mineral raw materials in the earth’s crust (second only to silicon dioxide), and it is also an important ceramic base material and chemical raw material in modern industry.
There are various crystal forms of alumina, including γ, δ, θ, α, etc. Additionally, there are less common forms such as η, κ, and χ. These different crystal forms of alumina exhibit significant differences in structure, properties, and formation conditions. Among them, α-Al₂O₃ (corundum) is the most stable, has the highest density, and also has the highest hardness and strength among all crystal forms.
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