Alumina Ceramic Parts for Equipment, Insulation & Wear Applications
ADCERAX is a China-based manufacturer of custom alumina ceramic parts — precision-made insulating, wear-resistant and structural components for industrial, semiconductor and electrical equipment. Parts are made to your drawing, sample or old-part photos in 95–99.9% Al2O3, with an engineering review of geometry, tolerance and working conditions before quotation.
Electrical isolation
Insulating rings, bases and spacers for electrode separation and mounting.
Wear & positioning
Sleeves, guides and locating parts for contact surfaces and assembly fit
Thermal support
Plates, tubes and boats selected around furnace loading and the temperature cycle.
What Are Alumina Ceramic Parts?
Alumina parts are precision-engineered mechanical and structural support components made from alumina ceramic (Al₂O₃). These alumina ceramic components are used across a wide range of demanding applications — including industrial machinery, semiconductor processing, electrical insulation systems, vacuum and analytical instruments, chemical processing equipment, and thermal control assemblies.
Typical products include spacers, housings, fixtures, wear pads, insulating sleeves, and precision holders, all designed to maintain performance under extreme temperature, voltage, or chemical exposure.
Specification · by purchasing unit
Browse Alumina Parts by Purchasing Unit
Select a component for a defined assembly position, then open its product page for detailed options.
Dense Ceramic Components
| Part family | Selection focus | Product entry |
|---|---|---|
| Rings & washers | OD, ID, thickness and contact-face requirements | Alumina rings · Washers |
| Shaft sleeves & tubes | Bore fit, length, end details and mating shaft or housing | Shaft sleeves · Tubes |
| Plates, rods & pins | Support layout, datum features, straightness or locating fit | Plates · Rods · Pins |
| Electrical insulation parts | Electrode layout, creepage path, mounting features and test voltage | Insulator parts · Insulating rings · Insulating bases |
| Process & positioning discs | Shaft connection, hole pattern, datums and operating loads | Sand mill agitator discs · Indexing discs |
| Furnace loading parts | Usable internal dimensions, sample load, atmosphere and temperature cycle | Alumina boats |
Additional Component Options
Alumina ceramic nozzles deliver accurate flow and exceptional wear resistance for abrasive or chemical media.
Alumina gauges ensure precise dimensional stability and insulation for accurate calibration work.
Alumina ceramic screws provide high strength, insulation, and corrosion resistance for industrial use.
Alumina ceramic robot arms combine rigidity, cleanliness, and electrical insulation for automation systems.
Functional Products & Thermal Insulation
Use the dedicated product entry to specify the complete purchasing unit and its functional requirements.
Alumina ceramic bearings deliver smooth rotation and excellent wear resistance under heat or chemical exposure.
Alumina ceramic heaters provide uniform heat distribution and excellent insulation for precision thermal control.
Alumina ceramic igniters ensure stable ignition and long working life for furnaces and gas systems.
Alumina oxide ceramic fiber provides excellent insulation and strength for high-temperature sealing and lining.
Alumina laser reflectors are structural reflector bodies with high dielectric strength and precision-ground datum faces.
View More Alumina Parts
Also browse by part family:
alumina washers, insulator parts, shaft sleeves, rings, plates, tubes and rods.
Alumina Grades & Typical Material Properties
Choose the grade by temperature, insulation, wear and contamination sensitivity — 95–96% for cost-effective general parts, 99% for higher insulation and corrosion duty, 99.5–99.9% (C799-class) for high-purity, high-temperature and semiconductor-adjacent work.
| Property | AD-ALU-950 | AD-ALU-960 | AD-ALU-990 | AD-ALU-995 | AD-ALU-997 | AD-ALU-999 |
|---|---|---|---|---|---|---|
| Al₂O₃ Content (wt%, nominal) | 95 | 96 | 99.00 | 99.50 | 99.70 | 99.90 |
| IEC 60672-3 Composition Class | C795 | C795 | C795 | C799 | C799 | C799 |
| Color | Ivory / white | White | Ivory | Ivory | Ivory | Ivory |
| Bulk Density (g/cm³) | 3.75 | 3.70 | 3.80–3.91 | 3.90–3.92 | 3.94 | 3.94 |
| Hardness (Mohs) | 9 | — | 9 | 9 | 9 | 9 |
| Vickers Hardness (HV1, 1 kgf) | — | 1600 | — | — | — | — |
| Flexural Strength (MPa, 20°C) | 280 | 300 | 300–320 | 320–350 | 330 | 315–340 |
| Compressive Strength (MPa, 20°C) | 2000 | 2000 | 2400 | 2400 | 2500 | 2558–2900 |
| Fracture Toughness, KIC (MPa·m½, method-dependent) | 3.0 | 3.5 (20°C) | 3.3 | 3.5 | 3.6 | 3.8–4.2 |
| Young’s Modulus (GPa) | 340 | 275 (20°C) | 355 | 365 | 370 | 359–375 |
| Thermal Conductivity (W/(m·K), 25°C unless noted) | 18–25 | 25 (20°C) | 24 | 30–38 | 35–40 | 35–42 |
| Mean Linear Thermal Expansion (10⁻⁶/K, 25–800°C unless noted) | 7.6 | 8.2 (25–1000°C) | 7.2 | 7.6 | 7.6 | 7.6 |
| Service Temperature Guide (°C, application-dependent) | 1400 | 1600 (maximum, air) | 1600 | 1650 | 1700 | 1750 |
| Water Absorption (%) | ≤0.20 | ≈0 (typical, rounded) | ≤0.10 | ≤0.10 | ≤0.05 | ≤0.01 |
| Dielectric Strength (kV/mm, 5 mm specimen unless noted) | 10 | 8.3 (AC; 6.35 mm) | 10 | 10 | 10 | 10 |
| Relative Permittivity, εr (1 MHz, 25°C unless noted) | 9.4 | 9.0 (room temperature) | 9.6 | 9.7 | 9.8 | 9.8 |
| Dissipation Factor, tan δ (1 MHz, 25°C unless noted) | 0.0004 | 0.0002 (20°C) | 0.0006 | <0.0001 | <0.0001 | <0.0001 |
| Volume Resistivity (Ω·cm, 20°C) | >10¹² | 10¹⁴ (typical) | >10¹⁴ | >10¹⁴ | >10¹⁴ | >10¹⁴ |
Choose the Right Alumina Grade for Your Part
The six alumina grades serve different functional priorities. Start with the application requirements, then compare candidate grades on the properties that govern your assembly.
01
95% & 96%
Selection focus: Cost-effective mechanical parts, wear components and fixtures.
Choose when: Cost and processing flexibility are the main priorities.
02
99% & 99.5%
Selection focus: Insulation, corrosion resistance and clean thermal processing.
Choose when: Electrical, chemical or purity demands are higher.
03
99.7% & 99.9%
Selection focus: High-purity service, demanding insulation and thermal cycling. Choose when: C799 composition, purity or high-temperature performance matters.
Selection sequence
- Identify the functional requirement: insulation voltage, wear medium, allowed elements and temperature.
- Compare candidate grades using the relevant properties in the material table.
- Balance performance against processing and procurement cost.
- Confirm suitability for the mating assembly and operating duty.
Where Alumina Parts Are Used
Alumina parts are used in industrial, semiconductor, and electrical systems requiring high strength and insulation. They function as insulators, spacers, bearings, and protective sleeves in chemical equipment, vacuum assemblies, and precision instruments, ensuring high performance under heat, wear, and corrosion.
Industrial Equipment
Wear-resistant spacers, rings and sleeves for pumps, valves and precision machinery.
Metal parts corrode, seize or deform under abrasion, chemicals and thermal cycling.
High-purity alumina machined to ±0.05 mm resists wear and corrosion in continuous operation — longer service life, less downtime.
Semiconductor & Electronics
Wafer handling fixtures, isolation parts, vacuum chucks and supports.
Metallic parts shed contaminants and drift dimensionally under heat and plasma.
99.7% alumina stays dimensionally stable and non-contaminating in vacuum and plasma environments, with minimal particle generation.
Chemical & Laboratory
Corrosion-proof housings, gauges, guides and supports for analytical/thermal equipment.
Glass and metal components degrade in acids, alkalis and solvents.
Chemically inert across pH 5.7–14 (excludes HF, hot phosphoric acid), stable to ~1730 °C, with polished contamination-free surfaces.
Electrical & Power
High-voltage insulators, standoffs and protective sleeves for sensors and power systems.
Polymer and metal parts lose insulation strength under heat and voltage cycling.
Stable dielectric insulation of ~15–23 kV/mm (typical) with no ion migration, machined to tight tolerances for reliable assembly.
Precision You Can Specify — Custom Alumina Parts by ADCERAX
From design and sample development to volume production, our alumina precision parts are made to your drawing and verified against it. Every project gets tailored engineering support and a quotation prepared after a manufacturability review of geometry, tolerance and grade.
Customize Alumina Ceramic Components Factory
ADCERAX is a professional alumina ceramic parts manufacturer, specializing in customized components with complex geometries, tight tolerances, and Al2O3 purity grades from 95% to 99.9%. Each part is made to your drawings or samples after an engineering review; lead time is confirmed together with the quotation once geometry, grade and quantity are reviewed.
Customization Options
Rings, plates, bushings, sleeves, insulators and wear parts made from your drawing or sample.
Bore size, sealing face, flatness, concentricity and surface finish reviewed by part use.
Chipping, abrasion, leakage, insulation loss or cracking checked before material choice.
95–99.9% alumina matched to temperature, voltage, wear and media.
Lead time, inspection items and documents confirmed after drawing and quantity review.
From Part Requirement to Repeat Supply
establish the purchasing unit and equipment position.
compare material candidates against the intended function.
define the part, finishing, inspection and delivery scope.
check the sample against the agreed specification.
use the approved drawing revision and order requirements.
What to include in your RFQ
- Part form and its usual English name (washer, bushing, insulator, nozzle…)
- Drawing, CAD file, or clear photos of the old part / sample
- Material or purity grade requirement, if known (95–99.9% Al2O3)
- Key dimensions and tolerances; roughness, flatness or concentricity as needed.
- Working temperature, atmosphere and media
- Voltage / insulation, vacuum, wear or corrosion conditions
- Quantity, annual demand and whether orders repeat
- Why the current part fails or why you are switching suppliers
Send whatever you have — our engineers review manufacturability and application fit before quoting.
How ADCERAX Supplies Alumina Parts
ADCERAX is a China-based custom alumina ceramic parts manufacturer, providing factory-direct supply, consistent quality, and full technical support for global OEM customers. From standard alumina components to custom-machined ceramic assemblies, we deliver precision manufacturing, dependable lead times, and engineering service worldwide.
Competitive pricing with strict quality control from raw material sourcing to final delivery
Professional team providing comprehensive technical support and collaborative design
Small batch orders to large-scale production with complex geometries and tight tolerances
Every inquiry is reviewed by an ADCERAX engineer; lead time is confirmed along with your quotation.
| Manufacturing Capabilities Overview | |||
|---|---|---|---|
| Capability Item | Typical Value / Description | ||
| Material Grades | 95%–99.9% Al₂O₃ high-purity alumina for machined alumina parts offering superior hardness, insulation, and corrosion resistance. | ||
| Dimension Range | Custom components available from micro-size insulators to large structural parts, with tolerances of ±0.005–2 mm depending on geometry. | ||
| Forming Methods | Isostatic pressing, precision CNC machining, and fine grinding ensure high density, dimensional stability, and repeatable accuracy. | ||
| Processing | Controlled sintering up to 1,700 °C; secondary polishing and lapping improve precision fits. | ||
| Surface Finish | Ground or polished finishes achieve Ra < 0.4 µm for smooth contact surfaces and consistent assembly performance. | ||
Frequently Asked Questions about Alumina Parts
Technical answers to help you specify, source, and use alumina ceramic parts effectively.
The manufacturing of alumina parts combines isostatic pressing, high-temperature sintering up to 1,700 °C, and precision CNC machining to achieve dense and stable ceramics.
Final grinding, polishing, or lapping ensures tight tolerances and smooth surfaces ready for assembly.
Please provide your drawing or sample photos, key dimensions (ID, OD, length, thickness) and tolerance requirements, the alumina grade (95–99.9% Al2O3) if known, quantity, and any surface finish or machining details. Our engineers confirm technical feasibility and prepare a detailed quotation after a manufacturability review.
As a rule of thumb: 95–96% suits cost-effective general insulation, wear and structural parts; 99% adds insulation and corrosion margin; 99.5–99.9% (C799-class) is used for high-purity, high-temperature or semiconductor-adjacent positions. The grades differ in strength, maximum temperature and dielectric behavior (see the typical property table above). The final grade is confirmed in the engineering review against your temperature, media and electrical conditions.
Yes. ADCERAX specializes in manufacturing alumina custom parts and alumina irregular parts through precision CNC machining and custom tooling.
We can achieve complex geometries such as cavities, threads, and step structures while maintaining tight tolerances and excellent surface finish.
Usually yes, as a review case: send clear photos of the old part, its main dimensions, the working temperature and media, and how it failed (cracking, wear, insulation loss, contamination). We assess material grade, geometry and manufacturability, then confirm what we can make. We do not promise drop-in replacement without this review.
Yes. ADCERAX supplies alumina components for laboratory and analytical systems, including furnace supports, igniters and insulation parts, precision-machined for stability, durability and electrical insulation under repeated thermal cycles. Custom designs are available — send your drawing or sample and our engineers will review it.
Identify the surfaces that locate, seal, slide or contact other components. Mark their finish and tolerance requirements separately from other surfaces so the finishing scope follows the function of each feature.
Pricing follows the material grade, geometry, finishing scope, critical tolerances, quantity and inspection requirements. Identifying the functional surfaces helps focus the quotation on the features that matter to the assembly.
Get in touch with us
We believe that Adcerax will become your best partner!
Please fill in your contact information in the form or call us.
info@adcerax.com
Tel.:+86-0731-84428843
WhatsApp:+86 19311583352
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