Alumina ceramic coil bobbin parts

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Alumina ceramic coil bobbin parts (1)_1
Alumina ceramic coil bobbin parts (2)_1
Alumina ceramic coil bobbin parts (1)_1
Alumina ceramic coil bobbin parts (2)_1

Alumina ceramic coil bobbin parts

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99% Alumina ceramic coil bobbin parts

The main features of high precision ceramic parts
1. High precision dimensions with tightening tolerance, it’s easier to get a perfect fitting relationship
2. Wear & abrasion resistance: Alumina is extreme hard technical ceramic with superb wear resistance
3. High-temperature ability: withstand up to 1650°C in oxidizing and reducing atmospheres
4. Chemical inertness, resistant most of the strong acid and alkali, and does not rust forever
5. Electrical insulation: The insulation breakdown is up to 18KV at least
6. Great mechanical properties, hardness, compressive and flexural strength are much higher stainless steel
7. Chemical corrosion resistance under high temperature, even if with strong acid or alkali
8. Protective atmospheres or high vacuum at high-temperature to eliminate contamination or impurity.
9. Low material cost in high-level applications than other technical ceramics

99% Alumina ceramic coil bobbin parts

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

99% Alumina ceramic coil bobbin parts

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

 

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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