Insulation Pipe Ceramic Alumina Tube

High-purity Alumina Ceramic Tubes For Insulation In High-temperature And High-voltage Environments

Alumina ceramic insulation pipes provide superior thermal and electrical insulation for applications in high-temperature, corrosive, and high-voltage environments.

Alumina Ceramic Tube Insulation Pipe Ceramic Insulator Tube Thermal Protection Tube +1 More

Insulation Pipe Ceramic Alumina Tube

High-purity Alumina Ceramic Tubes For Insulation In High-temperature And High-voltage Environments

Alumina ceramic insulation pipes provide superior thermal and electrical insulation for applications in high-temperature, corrosive, and high-voltage environments.

Alumina Ceramic Tube Insulation Pipe Ceramic Insulator Tube Thermal Protection Tube +1 More

Insulation pipe ceramic alumina tubes are made from high-purity Al₂O₃ (typically 95%–99.7%) and are designed to provide excellent electrical insulation, high mechanical strength, and outstanding thermal stability. These ceramic tubes are essential in applications where conventional materials fail under high voltage, corrosive media, or extreme heat.

With their low dielectric loss, high breakdown voltage, and high resistance to thermal shock, alumina tubes are widely used in furnaces, power equipment, thermocouple protection, vacuum systems, and electrical sensor insulation. Their smooth surface and dimensional accuracy make them suitable for precise assembly and long-term performance.

The tubes can be manufactured in single bore, double bore, multi-bore, and closed-end types, with customizable lengths, outer diameters, and wall thicknesses. They are chemically inert and resistant to most acids and alkalis, making them ideal for chemically aggressive environments.

Whether used for industrial heating elements, analytical instruments, or energy systems, ceramic alumina insulation tubes offer unmatched reliability in severe conditions.

Technical Datasheet of Advanced Alumina Ceramics
Material	Unit	95% Al₂O₃	96% Al₂O₃	99% Al₂O₃	99.5% Al₂O₃	99.8% Al₂O₃
Purity	%	95	96	99	99.5	99.8
Color	---	White/Pink	White	Ivory	Ivory	Ivory
Density	g/cm³	3.65	3.72	3.85	3.90	3.92
Water Absorption	%	0	0	0	0	0
Moh's Hardness	---	9	9	9	9	9
HV Hardness	---	>1300	>1300	1700	1750	1800
Flexural Strength @25°C	MPa	300	300	330	375	390
Fracture Toughness	MPa·m^1/2	3~4	3~4	3~4	4	4
Compressive Strength (25°C)	MPa	2200	2200	2350	2450	2500
Thermal Conductivity @25°C	W/m·K	18–22	≥24	27	29	32
Thermal Expansion Coefficient (25–1000°C)	10^-6/°C	8	8	8	8	8
Thermal Shock Resistance	ΔT (°C)	220	220	180–200	180–200	180–200
Max. Working Temperature	°C	1500	1500	1700	1750	1750
Dielectric Strength	kV/mm	16	17.2	20	22	22
Electrical Resistivity @25°C	Ω·cm	10¹⁴	10¹⁴	10¹⁴	10¹⁴	10¹⁴
Dielectric Constant @1MHz	---	9	9	9.7	9.7	9.8
Dielectric Loss (Tan δ) @1MHz	---	0.0004	0.0002	0.0002	0.0001	0.0001

Compare physical, thermal, and electrical properties across various purity levels of alumina ceramic (Al₂O₃).

Specification of Ceramic Tubes
Parameter	Details
Material Options	Alumina (40%–99.8%), Zirconia, Silicon Carbide, Silicon Nitride
Forming Methods	Extrusion, Dry Pressed, Hot Pressed, CIM, ISO Pressed
Dimensional Capability	Min. ID: 1mm; Max. OD: 800mm
Dimensional Tolerance	OD ±0.005mm, ID ±0.01mm, Length ±0.001mm
Surface Treatment	Polished, Glazed, or Metalized
Secondary Processing	CNC machining, lapping, threading, drilling, grinding, laser cutting