High temperature resistance, insulation, high purity – 99.7 alumina ceramic tube, a stable choice for scientific research and industry

99.7% high-purity alumina ceramic tubes are manufactured from high-purity alumina powder through dry pressing, high-temperature sintering (≥1700°C), and precision machining.
The material boasts high density, uniform grain size, and extremely low porosity, providing exceptional mechanical strength and insulation properties.
The surface can be polished or the internal bore can be precision ground as required to meet specialized operating conditions such as vacuum, insulation, and high-temperature transmission.

Main forms include:

Double-opening alumina ceramic tubes

Bottom-sealed alumina ceramic tubes

Thin-walled high-precision alumina capillary tubes

Large-diameter, thick-walled ceramic protective tubes

Ultra-high purity, more stable performance

Al₂O₃ content ≥99.7%, extremely low impurities, ensuring no contaminant precipitation at high temperatures, suitable for vacuum and semiconductor process environments.

Excellent high-temperature strength

Sustainable for long-term use at 1600°C while maintaining excellent mechanical properties and dimensional stability.

Excellent insulation properties

With a resistivity as high as 10⁴ Ω·cm and a dielectric strength of 25 kV/mm, it is an ideal high-voltage insulation material.

Abrasion and corrosion resistance

Excellent inertness to acids, alkalis, molten metals, and various gases, it resists rust and oxidation.

High density and airtightness

With a true density of up to 3.9 g/cm³ and a porosity of less than 0.1%, it is widely used in vacuum and gas delivery systems.

Vacuum and high-temperature furnace equipment

Used as thermocouple protection tubes, insulating spacers, gas delivery tubes, and heating element support tubes.

Semiconductor and electronics industries

Used in ion implantation equipment, vacuum chamber isolation tubes, electrode insulation tubes, and other high-cleanliness environments.

Analytical instruments and medical equipment

Used as insulating isolation tubes, detection tubes, and sensor protection tubes, ensuring accuracy and long-term stability.

Metallurgy and Chemical Industry

Suitable for guiding and protecting high-temperature molten metals, corrosive fluids, or gases.

New Energy and Scientific Research Experiments

Applied as insulation and support structures in battery experiments, high-temperature reaction equipment, and material testing platforms.

Dongguan Haikun New Materials Co., Ltd. has specialized in the processing and manufacturing of industrial ceramic structural components for 20 years, boasting a complete production system from powder preparation, molding and sintering to precision grinding.

We offer:

99.7% high-purity alumina ceramic tubes in various specifications, custom-made to your specifications

High-precision internal and external diameter machining

Supports complex structural processing such as polishing, grooving, drilling, and bottom sealing

Fast prototyping and stable batch supply

Strictly adheres to the ISO9001:2015 quality management system

Haide Precision Ceramics, with “high purity, high precision, and high reliability” as its core standards, provides customers with integrated solutions from material selection to process optimization.