Alumina (Al₂O₃) Ceramic Rings & Insulators - customizable

Product Features and Brief Description

We manufacture precision **alumina ceramic** components used as insulators, valve seats, and wear-resistant rings. Available in ≥95% and ≥99.5% grades with CNC machining, tight tolerances and scalable volume output to meet engineering and procurement requirements.
Material: Alumina (Al₂O₃)
Processing: CNC / Precision Grinding
Use: High‑temp / High‑wear / Electrical Insulation
Why choose these alumina components?
High dielectric strength — dense, fully sintered Al₂O₃ offers stable insulation for electrical and high-voltage applications.
Wear & corrosion resistance — ceramic rings reduce metal-to-metal wear in valves and pumps when exposed to abrasive media.
Thermal stability — usable at temperatures up to ~1600°C in short-term exposures depending on system design.
Precision tolerances — typical CNC tolerance ±0.05 mm; achievable tighter tolerances after process review.

Inquire Now
shx@norkeceramics.com

Product Description

Product Description

Technical specification (typical ranges)

Property Typical / Range
Material Alumina (Al₂O₃), grades: ≥95% / ≥99.5%
Density ~3.6 – 3.9 g/cm³ (dependent on grade & sintering)
Porosity <0.5% (dense sintered)
Flexural strength 120 – 350 MPa (geometry & process dependent)
Hardness (Vickers) ≈1300 – 2000 HV
Maximum continuous temp. Up to 1600°C (application dependent)
Dielectric strength ~10 – 15 kV/mm (dense samples)
Typical tolerance ±0.05 mm (negotiable)

Note: values above are process‑dependent. We supply full test reports on request (dimensions, density, dielectric & mechanical tests) for procurement approval.

Manufacturing & quality control

Production combines high‑quality alumina powders, pressing or injection/gelcasting for complex shapes, followed by controlled sintering and precision finishing (CNC drilling, turning, lapping). Every batch undergoes 100% visual inspection and sampling-based dimensional and property verification. Third‑party testing can be arranged per purchase order.

Typical applications

Valve seats and sealing rings in pumps handling abrasive or corrosive fluids.

Insulating rings and spacers in high-voltage and power equipment.

Wear-resistant components in mechanical seals and high-temperature bearings.

Positioning & support rings in semiconductor and precision equipment.

Ordering & packaging (industrial procurement)

Item Details
MOQ Samples: 1–5 pcs; typical production MOQ: 10,000 pcs (negotiable based on geometry & finish)
Lead time Samples 5–12 working days; production 3–6 weeks depending on volume and finishing
Packing Multi-layer protective foam & box; palletised for bulk orders. Custom industrial packaging available.
QC 100% visual inspection; dimensional reports; optional dielectric/mechanical test certificates.

How to request a quote

Please provide: part drawings (DWG / DXF / STEP), required material grade (e.g.,≥99.5% Al₂O₃), tolerances, surface finish, operating conditions (temperature, medium, mechanical load) and estimated annual quantity. We will respond with a sample feasibility and a factory quotation.

Request a sample & quotation

Quick spec summary

Material: Alumina (Al₂O₃)

Grades: ≥95% / ≥99.5%

Tolerance: ±0.05 mm typical

Use: Insulator, valve seat, wear ring

Contact Us

We aim to provide a sample plan & quote within 1–3 business days after receiving drawings.

Property	Typical / Range
Material	Alumina (Al₂O₃), grades: ≥95% / ≥99.5%
Density	~3.6 – 3.9 g/cm³ (dependent on grade & sintering)
Porosity	<0.5% (dense sintered)
Flexural strength	120 – 350 MPa (geometry & process dependent)
Hardness (Vickers)	≈1300 – 2000 HV
Maximum continuous temp.	Up to 1600°C (application dependent)
Dielectric strength	~10 – 15 kV/mm (dense samples)
Typical tolerance	±0.05 mm (negotiable)

Item	Details
MOQ	Samples: 1–5 pcs; typical production MOQ: 10,000 pcs (negotiable based on geometry & finish)
Lead time	Samples 5–12 working days; production 3–6 weeks depending on volume and finishing
Packing	Multi-layer protective foam & box; palletised for bulk orders. Custom industrial packaging available.
QC	100% visual inspection; dimensional reports; optional dielectric/mechanical test certificates.