Alumina Ceramic Tube for Automotive Sensors

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Alumina Ceramic Tube for Automotive Sensors

Main Features

• High hardness with low density
• Wear & abrasion resistant
• Resists strong acid and alkali attack at high temperatures
• Excellent electrical insulation properties
• High compressive strength
• High mechanical Strength
• Excellent refractory material
• Moderate thermal conductive and thermal expansion rates
• Resistant to thermal shock
• High dielectric strength
• Transparent to microwave radio frequencies

The specification of ceramic parts

Material optionAlumina(Al2O3), Zirconia (ZrO2), Silicon carbide(SiO2), Silicon nitride(Si3N4)
Forming methodsISO pressed, Dry pressed, Ceramic injection molding, Hot pressed
SpecificationOD can be from 1 to 50mm, length can be from 10mm to 800mm
Precision processingCNC machining, Precision grinding, Polishing, Lapping,
ToleranceThe tolerance of OD and ID can be 0.001mm,  the tolerance of length can be 0.001mm
Key parametersRoughness to be 0.02mm, Flatness to be 0.001mm, Parallelism to be 0.001mm
Surface qualityFree of cracks, foreign contamination, mirror surface better than Ra0.1

Alumina Ceramic Tube for Automotive Sensors

The description of high precision alumina ceramic parts

Alumina (Al2O3) is a hard-wearing technical ceramic material frequently used in a broad range variety of industries applications. After firing and sintering, the alumina ceramic parts can only be precisely machined using diamond-grinding methods. It’s charactered by high tighten tolerance, high hardness and wear resistance, low erosion levels, high-temperature resistance, corrosion resistance, and chemical stability. Furthermore, it can be highly polished making it a mirror surface to reduce friction at the fitting, working status.
We offer a selection of purities ranging from 95 – 99.8%. Our factory has access to many different types of shaping methods, including dry pressing, hot pressing, ceramic injection molding, ISO pressing, tape casting, and extruded.
Our facility is capable of machining a variety of complicated ceramic parts with a very high accuracy dimension through fine grinding, lapping, CNC machining, laser cutting, and so on.

Datasheet of Technical ceramics

PropertyUnitsMaterial
99.5%
alumina
99%
alumina
95%
alumina
ZrO2
(Y-TZP)
ZrO2
(TTZ)
Densityg/cm3≥3.85≥3.80≥3.60≥5.95≥5.72
Water absorption%00000
HardnessHV1700170015001300900
Flexural strengthMpa≥379≥338≥320≥1200≥1200
Compressive strengthMpa≥2240≥2240≥2000≥19901750
Fracture toughnessMpa m1/24-54-53-46.5-811
Max. service
temperature
ºC1675160014501000
CTE1×10 -6 /ºC6.5~8.06.2~8.05.0~8.08.0~9.510.2
Thermal shockT(ºC)≥250≥200≥220≥300350
Thermal conductivity(25ºC)W/m.k30292433
Volume resistivityohm.cm
25ºC>1 x 10 14>1 x 10 14>1 x 10 14>1 x 10 11>1 x 10 11
300ºC1 x 10 128 x 10 1110 12 -10 131 x 10 101 x 10 10
500ºC5 x 10 102 x 10 91 x 10 91 x 10 61 x 10 6
Insulation strengthKV/mm1918181720
Dielectric constant(1Mhz)(E)9.79.59.52928

Alumina Ceramic Tube for Automotive Sensors

Our capability and strength

We have in-housing comprehensive manufacturing types of equipment, including forming, sintering,
CNC machining, precision grinding, laser cutting, and so on, it helps us to control the quality very well.
Also, it greatly benefits cost control.

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