Alumina Bushing

Purity: 95%, 96%, 99%, 99.5%, 99.7%, 99.95%
Diameter: 0.8-100 mm, or customized

Custom sizes and standard sizes in stock
Quick Lead Time
Competitive Price

Alumina Bushing is a high-performance ceramic component primarily made of high-purity aluminum oxide (Al2O3) through high-temperature sintering. It is widely used in electrical insulation, mechanical protection, and high-temperature corrosive environments. As a leading supplier and manufacturer of premium alumina products, we can supply high-quality alumina bushings with various specifications and competitive prices, offering customized solutions to meet specific requirements.

Or email us at sales@heegermaterials.com.

Alumina Bushing Data Sheet

Reference Code:	HM1986
Purity:	95%, 96%, 99%, 99.5%, 99.7%, 99.95%
Color:	White or Ivory
Density:	3.7-3.98 g/cm³

Alumina Bushing

Alumina Bushing is made primarily from high-purity aluminum oxide with rare additives, sintered at a high temperature of 1700℃ to get the completely dense product. It has excellent wear resistance, high-temperature stability, thermal shock resistance, chemical stability, high hardness, and insulation. It is widely applied in electrical insulation, mechanical protection, and high-temperature corrosive environments. Advanced Ceramics Hub can supply customized solutions for shapes and dimensions to meet diverse industrial and research requirements.

Alumina Bushing Advantages

Excellent Insulation: Alumina bushing has high electrical resistivity, ideal for insulation applications.
High-Temperature Resistance: Alumina bushing can withstand up to 1700°C without deformation.
Strong Wear Resistance: Alumina bushing has high hardness, ensuring durability and a long lifespan.
Chemical Stability: Alumina bushing can resist acid and alkali corrosion, suitable for harsh environments.
Thermal Shock Resistance: Alumina can tolerate rapid temperature changes without cracking.

Alumina Bushing Applications

Electrical Insulation: Alumina bushing can be used in high-voltage equipment as insulating components to prevent electrical breakdown.
Mechanical Protection: Alumina bushing can protect cables or pipes from wear and high temperatures in mechanical systems.
Wear-Resistant Parts: Alumina bushing serves as durable bushings to extend equipment lifespan.
High-Temperature Environments: Alumina bushing acts as heat-resistant and supportive components in furnaces or engines.
Chemical Equipment: Alumina bushing can shield pipes or sensors in corrosive environments.

Electrical and Electronic Area
High-temperature Lab
High-temperature Furnaces
Aerospace

Alumina Material Properties

Material	Unit	95% Al2O3	96% Al2O3	99% Al2O3	99.5% Al2O3	99.7% Al2O3	99.95% Al2O3
Density	g/cm³	3.7	3.7	3.85	3.9	3.95	3.98
Bending Strength (20℃)	Mpa	300	300	330	360	380	500-600
Compressive Strength (20℃)	Mpa	2000	2000	2000	2350	2000	3500
Young’s Modulus (20℃)	Gpa	270	275	370	370	380	400
Fracture Toughness (20℃)	MPam^½	3.5	3.5	4	4	4	4.5
Poisson’s Ratio(20℃)	\	0.2	0.22	0.22	—	0.23	0.23
Mohs Hardness(20℃)	HRA	8.0-8.5	8.0-8.5	8.5-9.0	9.0	9.0-9.5	9.0-9.5
Vickers Hardness (HV1)	kg/mm²	1600	1600	1600	1650	1750	1800

Material	Unit	95% Al2O3	96% Al2O3	99% Al2O3	99.5% Al2O3	99.7% Al2O3	99.95% Al2O3
Thermal Expansion Coefficient (25-300 ℃）	10^-6K^-1	6.5	6.5	7.6	7.2	7.2	7.5
Thermal Conductivity (20℃)	W/mk	20	25	27.5	32	32	45
Thermal Shock Resistance	△T·℃	200	200	200	250	—	400
Specific Heat Capacity	J/g·k	—	—	0.79	0.78	0.79	0.80
Max Operating Temperature (Oxygen Condition)	℃	1600	1600	1650	1650	1700	1750

Material	Unit	95% Al2O3	96% Al2O3	99% Al2O3	99.5% Al2O3	99.7% Al2O3	99.95% Al2O3
Volume Resistivity (20℃)	Ω·cm	10¹⁴	10¹⁴	10¹⁴	10¹⁴	10¹⁴	10¹⁴
Dielectric Strength	KV/mm	10	10	10	15	15	16
Dielectric Constant (1 MHz, 25℃)	\	9	9	9.1	9.9	9.9	9.9
Dielectric Loss Tangent (1MHz, 20℃)	tanδ	3*10^-4	2*10^-4	3*10^-4	1*10^-4	1*10^-4	1*10^-4

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Alumina Ceramic Machining

Alumina ceramics are produced through methods such as injection molding, die pressing, isostatic pressing, slip casting, and extrusion. After sintering and densification, machining requires diamond grinding techniques. Advanced Ceramic Hub utilizes cutting-edge green and biscuit machining technology to produce more complex components with traditional methods. Our advanced machining center includes drilling, grinding, milling, polishing, sawing, tapping, threading, and turning, enabling the manufacture of alumina ceramic components with tight tolerances and high complexity. During the machining process, the following precautions should be observed:

Shrinkage Control: Alumina ceramics shrink by about 20% during sintering, requiring dimensional adjustments in the green body stage.
Tolerance Control: Precise tolerances are unachievable in the green or pre-sintered state; fine machining should follow sintering.
Diamond Grinding: Post-sintering, high-hardness alumina requires diamond grinding, as conventional methods fall short.
Tool Selection: Diamond-coated tools or grinding wheels are essential to handle ceramic hardness and prevent tool damage.
Temperature Control: Strict temperature management during sintering prevents cracking or deformation.
Stress Management: Excessive stress during machining must be avoided to prevent brittle failure.
Cutting Speed and Feed Rate: Controlled speeds and feeds ensure quality and extend tool life.
Surface Treatment: Post-machining polishing removes defects, enhancing performance and appearance.

Alumina Ceramic Packaging

Alumina Ceramic products are typically packaged in vacuum-sealed bags to prevent moisture or contamination and wrapped with foam to cushion vibrations and impacts during transport, ensuring the quality of products in their original condition.

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To customize your alumina bushing, please provide the following details:

Dimensions: Inner diameter × Outer diameter × Length (or other specific dimensions).
Purity of the material (95%, 96%, 99%, 99.7%, 99.95%, etc.)
Tolerances: Specify the required tolerances.
Surface Finishes: Polished, rough, etc.
Quantity of the bushings you need
Alternatively, you can provide a drawing with your specifications.

Once we have these details, we can provide you with a quote within 24 hours.

We carry a wide variety of alumina products in stock, and for these, there is generally no minimum order requirement. However, for custom orders, we typically set a minimum order value of $200. The lead time for stock items is usually 1-2 weeks, while custom orders usually take 3-4 weeks, depending on the specifics of the order.

Alumina ceramics is a high-performance ceramic material composed of alumina with a purity ranging from 90%~99.9%. It has excellent heat resistance, corrosion resistance, and high hardness, commonly used in industrial components, electronic substrates, and medical devices.

Alumina ceramics offers advantages including high strength, wear resistance, high-temperature tolerance (up to 1700 ℃), excellent electrical insulation, and chemical stability, performing exceptionally in harsh conditions.

Alumina ceramics is cost-effective with excellent hardness and wear resistance, ideal for industrial use.
Zirconia ceramics offer higher toughness and fracture resistance and are often used in medical and precision parts.

Advanced Ceramic Hub, established in 2016 in Colorado, USA, is a specialized supplier and manufacturer of graphene products. With extensive expertise in supply and export, we offer competitive pricing and customized solutions tailored to specific requirements, ensuring outstanding quality and customer satisfaction. As a professional provider of ceramics, refractory metals, specialty alloys, spherical powders, and various advanced materials, we serve the research, development, and large-scale industrial production needs of the scientific and industrial sectors.

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Product*

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Alumina Bushing

Alumina Bushing

Alumina Bushing Data Sheet

Alumina Bushing

Alumina Bushing Advantages

Alumina Bushing Applications

Alumina Material Properties

Physical Properties:

Applications:

Physical Properties:

Applications:

Physical Properties:

Applications:

Physical Properties:

Applications:

Alumina Ceramic Machining

Alumina Ceramic Packaging

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Alumina Bushing

Alumina Bushing Data Sheet

Alumina Bushing

Alumina Bushing Advantages

Alumina Bushing Applications

Alumina Material Properties

Physical Properties:

Applications:

Physical Properties:

Applications:

Physical Properties:

Applications:

Physical Properties:

Applications:

Alumina Ceramic Machining

Alumina Ceramic Packaging

Download

Get A Quote

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