Detail Information

Material:	99% High Purity Alumina (Al₂O₃) Ceramic	Shape:	Annular Flange With Counterbore Mounting Holes
Core Performance:	High Insulation, High Temperature Resistance, Wear & Corrosion Resistant	Density:	3.85g/cm³
Continuous Working Temp:	Up To 1550℃	Machining Tolerance:	±0.005mm
Surface Finish:	Fine Ground Matte / Mirror Polished	Function:	Electrical Isolation, Sealing Support, Wear-resistant Positioning
Custom Service:	Custom OD, ID, Hole Positions, Step Grooves Available	Supply Mode:	Standard Parts In Stock, Custom Molding Per Drawings

Product Description

High Temp Wear Resistant Alumina Ceramic Ring Flange

This 99% alumina ceramic flange is integrally dry-pressed from high-purity alumina powder, densely sintered at 1700℃, then precision processed via CNC turning, drilling and step groove fine grinding. Uniform dense pore-free body, equipped with evenly distributed counterbore mounting holes and positioning steps for tight assembly. It serves as dedicated insulating & wear-resistant annular components for high-temperature equipment, high-voltage electrical systems and fluid sealing devices. Custom non-standard sizes including outer diameter, inner diameter, hole layout and step structures are available, we accept small trial batches and mass overseas orders.

Core Advantages:

1:Excellent Electrical Insulation: High breakdown voltage, non-conductive under high temperature to avoid short circuit risks;

2:Stable High Temperature Performance: Long-term service up to 1550℃ without deformation, crack resistant under rapid thermal cycling;

3:Superior Wear & Corrosion Resistance: Mohs hardness 9, resistant to acid, alkali and organic solvents, far longer service life than metal flanges;

4:Precision Integrated Machining: Hole spacing, steps and concentricity tolerance controlled within ±0.005mm for error-free installation;

5:Low Thermal Expansion for Sealing: Stable thermal expansion coefficient, prevents gas & liquid leakage with gaskets during long-term operation.

Application 
High Voltage Electrical Equipment: Vacuum chamber insulating flanges, power device isolation bases
High Temperature Industrial Furnace: Heat treatment furnace sealing support flanges, heating module insulation rings
Fluid Metering Equipment: Corrosion-resistant pump sealing flanges, chemical pipeline insulating connectors
New Energy Equipment: Energy storage converter insulation supports, wear positioning flanges for battery production lines
Semiconductor Equipment: Ceramic insulating annular seals for vacuum coating machines

Mechanical Properties

Properties

Unit

95%Al2O3

99%Al2O3

99.5%Al2O3

Colour

--

White

Yellow

Yellow

Density

g/cm³

3.7

3.85

3.9

Hardness

GPa

13.7

15.2

15.7

Compressive Strength

MPa

2000

2160

2350

Flexural Strength

MPa

280

310

350

Fracture Toughness

MPa・m1/2

3~4

3~4

4.5

Modulus of Elasticity

GPa

320

360

370

Poissons Ratio

--

0.23

0.23

0.23

Thermal Properties

Properties

Unit

95%Al2O3

99%Al2O3

99.5%Al2O3

Maximum Use Temperature

℃(No load)

1650

1650

1650

Thermal Conductivity @ 20°C

W/(m・K)

24

29

32

Thermal Expansion a at 20–400°C

1 x 10-6/°C

7~8

7~8

7~8

Specific Heat

J/(kg・K)

780

790

780

Thermal Shock Resistance

℃(Put in water)

200

200

200

Electrical Properties

Properties

Unit

95%Al2O3

99%Al2O3

99.5%Al2O3

Dielectric Constant

1MHz

9.4

9.9

9.9

Dielectric Strength

V/m

15 x 10 6

15 x 10 6

15 x 10 6

Dielectric Loss

1MHz

4 x 10 -4

4 x 10 -4

4 x 10 -4

Volume Resistivity @ 25°C

Ω・cm

>10 14

>10 14

>10 14

Volume Resistivity @ 500°C

Ω・cm

>10 8

>10 8

>10 10

Various Types of Alumina Ceramic Sealing Ring

We Can Do OEM and 0BM According to Your Drawing and Requirements.

Customization & Global Delivery1:Custom Options: Outer & inner diameter, hole quantity/diameter/spacing, end steps, grooves, chamfers;
Sample Support: Free small samples for testing, fast processing solution per drawings or prototypes;
Quality Assurance: Factory inspection reports for dimensional accuracy, insulation performance and thermal resistance;
International Trade: FOB, CIF, DAP terms available, stable delivery to Europe, America, Southeast Asia, Japan and South Korea.

Packing 

FAQ
Q1. Do you provide product samples? Yes, we provide samples subject to availability. A nominal sample fee may apply in some cases, and shipping costs are borne by the customer.

Q2. What are your accepted payment methods? We accept T/T (bank transfer) in advance, Western Union, Alipay, and PayPal.

Q3. What is your typical delivery lead time? Lead times vary depending on product requirements, including material selection, dimensions, and specific manufacturing processes.

Q4. Do you perform quality inspection before shipment? Yes, we conduct 100% inspection of all goods prior to delivery to ensure they meet specified standards.

Q5. What other ceramic materials do you offer? We supply a range of advanced ceramic materials, including Alumina, Zirconia, Aluminum Nitride,Boron Nitride, Silicon Nitride, Machinable Glass Ceramic, and related specialized ceramic

Tag:

Place of Origin:	CHINA
Brand Name:	YH
Certification:	ISO，CE，ROHS
Model Number:	Yh

Minimum Order Quantity:	10
Price:	Negotiated
Packaging Details:	by caront or wooden case
Delivery Time:	10-30days
Payment Terms:	L/C,D/A,D/P,T/T,Western Union
Supply Ability:	10000pcs per month

Precision Insulating 99% Al2O3 Alumina Ceramic Flange with Mounting Holes Custom Machining

High Temp Wear Resistant Alumina Ceramic Ring Flange

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Properties	Unit	95%Al2O3	99%Al2O3	99.5%Al2O3
Colour	--	White	Yellow	Yellow
Density	g/cm³	3.7	3.85	3.9
Hardness	GPa	13.7	15.2	15.7
Compressive Strength	MPa	2000	2160	2350
Flexural Strength	MPa	280	310	350
Fracture Toughness	MPa・m1/2	3~4	3~4	4.5
Modulus of Elasticity	GPa	320	360	370
Poissons Ratio	--	0.23	0.23	0.23