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Sealing Part Alumina Ceramic Washer Shim

Shengda Ceramic provide all kinds of alumina ceramic part. Also can supply the mirror surface treatment to meet the sealing requirements of bearings, etc. Any dimension requirement, please contact us.

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Product Introduction

High-Performance Al2O3 Ceramic Rings for Extreme Environments
Customized 99% Alumina Ceramic Rings with Superior Thermal & Electrical Insulation.

Key Advantages
✔ Precision Machining - CNC grinding achieves ±0.01mm dimensional tolerance
✔ Thermal Shock Resistance - Withstands ΔT 1000°C→25°C water quenching (tested per MIL-STD-883)
✔ Chemical Inertness - Resists HF acid (40% concentration) and molten metals

Customized Machining High Temperature Resistance 99 Alumina Ceramic Ring Al2o3 Ceramic Parts

Industry Applications

1. Semiconductor Manufacturing

Problem Solved: Plasma etching chamber components degrading under 1500°C halogen gas

Our Solution: Alumina ceramic rings with Y2O3 coating reduced particle contamination by 73% (verified by SEMI F47 testing)

2. Aerospace Thermal Protection

Case Study: Replaced Inconel heat shields in rocket engine test stands

Result: 42% weight reduction while maintaining 1600°C thermal barrier performance

3. High-Voltage Insulation

Application: Bushings for 500kV DC transmission systems

Performance Data: Leakage current <0.1μA at 85% humidity (per IEC 62231)

Customization Capabilities

Size Range: ID 2mm-500mm × OD 5mm-600mm × Height 1mm-300mm

Special Features:

Laser-drilled micro holes (Ø0.3mm min)

Conductive metallization (Mo-Mn or W coatings)

Vacuum brazing ready surfaces

Quality Assurance
▸ 100% dimensional inspection with CMM (Zeiss CONTURA G2)
▸ Batch traceability with material certification (SGS/MSDS)
▸ RoHS/REACH compliant

Ceramic Properties

Properties	Units	Cordierite Ceramic	Mullite Ceramic	95%Alumina Ceramic	99%Alumina Ceramic	99.5%Alumina Ceramic	99.7%Alumina Ceramic	Silicon Nitride	Zirconia Ceramic
Colour		Yellow	White	White	Light yellow	Light yellow	Light yellow	Black	White
Density	g/cm3	1.9	2.6	3.6	3.8	3.8	3.9	3.2	6
Flexural Strength	Mpa	30	120	300	350	375	375	800	1100
Compressive Strength	MPa	350	500	2500	2800	2800	2554	2600	3000
Modulus of Elasicity(20℃）	Gpa	40	100	300	350	350	357	290	320
Max Use Temperature	°C	1200	1300	1400	1500	1500	1760	1300	1050
Thermal Condutivity	W(m.K)	1.3-1.8	2~6	20	30	30	33-38	25	3
Thermal Expansion Cofficient	10-6/°C	2.5-3	2.5-3	7.5	8	8.2	8.2	3	10
Thermal Shock Resistance	△T℃	300	150	140	150	200	223	600	250
Dielectric Strength	KV/mm	-	-	15	18	18	23.4	14	15
Dielectric Constant	Er	8	8	9	9.2	9.2	9.84	9	26

Production process

1. Grind and crush the raw materials to be slurry or powder

2. se-different method to making the slurry or powder into semi-finished products

3. Put the semi-finished products into the kiln for dewaxing and sintering;

4. After forming and sintering, Ceramic Sleeves products can also be processed by subsequent CNC precision machining according to the drawing requirements. Then Q/C test.

5. Finally package Ceramic Sleeves by bubble paper or cartons and place it on tray for delivery

95 alumina substrate

Certifications

95 alumina substrate

Our customers

Packaging and shipping

95 alumina substrate

Transport

Alumina AL2O3 Substrate Insulating Ceramic Substrate Thermally Conductive Ceramic Sheet

FAQ：

Q: Do you have the products in stock?

A: Some standard produce have in stock, such as ceramic band heater insulator; bobbin heater insulator and ceramic connector. But it needs to check according to your requirement.

Q: How do you pack the goods?

A: Our standard packaging is carton, we can customize it as per your requirement as well.

Q: How many days do you finish the sample?

A: Usually 15 business days (Including 8days for making furnaces and 7days for producing samples)

High Temperature Alumina Ceramic Block Ring