Can you provide the free samples?

Yes, we would like to offer samples or similar ones for free, but the courier fee be collected.

99% Alumina Ceramic Tube for Electrical Insulation

Name: 99% Alumina Ceramic Tube for Electrical Insulation
Brand: Herun Ceramics Co., Ltd.
SKU: 1975964251

Zhejiang, ChinaHerun Ceramics Co., Ltd.

US$1.00

10-999 Pieces

US$0.80

1,000-9,999 Pieces

US$0.56

10,000+ Pieces

Sample price:US$10.00/piece.Request sample

Product profile

Customization

Available

Application

Aerospace Industry, Automotive Industry, Electrical Industry, Electronic Industry, Power Generation Industry

Electrical Insulation

High Voltage Insulator

Model NO.

HERUN

Material

Alumina Ceramic

Shape

Plate

Density

3.6–3.9 G/Cm³

Hardness

Mohs Hardness ≥ 9

Surface Roughness

Ra0.1–ra3.2 (Customizable)

Thermal Conductivity

15–35 W/M·K

Thermal Shock Resistance

Moderate (Not Recommended for Rapid Thermal Cyclin

Insulation Resistance

>10¹² Ω·cm

Flexural Strength

300–500 MPa

Fracture Toughness

3–4 MPa·m

Corrosion Resistance

Resistant to Most Acids, Alkalis, and Some Molten

Forming Method

Dry Pressing, Isostatic Pressing, Injection Moldin

Industrial Equipment

Bushings, Nozzles, Guide Rails, Sliders

Transport Package

Sea Freight/Air Freight/Wooden Case Packaging

Specification

100*100mm

Trademark

HERUN ceramic

Origin

China

HS Code

6914100000

Production Capacity

500000PCS/Year

Key features

High Purity Options: Available in 96%, 99%, 99.5%, and 99.7% alumina grades for specific performance needs.

Custom Surface Finish: Surface roughness customizable from Ra0.1 to Ra3.2, with options down to Ra0.005.

Chemical Inertness: Resistant to corrosion by most acids, alkalis, and molten metals for harsh environments.

Flexible Customization: Full customization from samples or designs, including shape, size, and specific technical requirements.

Fast Prototyping: Capable of moving from prototype design to mass production in a short period.

Company profile

High Repeat Buyers ChoiceIn-stock CapacityQuality AssuranceQA/QC Inspectors

Herun Ceramics Co., Ltd.

Zhejiang, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 4 yearsNearest Port: ninboAverage Response Time: ≤8.88h

AI-Powered supplier vetting

SummaryThe supplier manufactures special ceramic products, electronic specialized materials, hardware products, and related ceramic and composite materials. It reports extensive customization options, ODM capability, OEM service for well-known brands, one production line, listed ceramic and metal-processing equipment, and 31–40 quality-control staff. Service capacity includes in-stock capability and stated lead times of within 15 working days off-season and one month during peak season. However, the supplier lacks a valid manufacturing contract with its related subcontractor, has no overseas warehouse, showroom, agents, or branches, and has not participated in offline trade shows. Quality controls include assurance and material checks, but raw-material traceability is absent and complaint handling lacks written records. Financial records are referenced for 2021–2023, but their substantive results are not provided. Environmental and fire-drill status are unknown.

Supplier typeThe supplier is a manufacturer focused on special ceramic products, electronic specialized materials, hardware products, and ceramic-based or metal-based composite materials. Its equipment list includes ceramic kilns, hydraulic presses, punching machines, and grinding machines, while one production line is reported, supporting classification as a specialized ceramic manufacturer rather than a purely trading company.

R&D capabilityThe supplier reports that it had new products during the past year, offers ODM services, and provides customization from samples and designs. Its R&D engineer experience is listed as 1, while no SDK is available; the evidence supports product-development activity but not a broad or highly mature innovation infrastructure.

Production capacityProduction resources include a ceramic kiln, hydraulic press, punching and grinding machines, one production line, in-stock capability, and 31–40 quality-control staff. Reported lead times are within 15 working days off-season and one month during peak season, but the absence of a valid contract with a related subcontractor creates a documented production-governance weakness.

Customization capabilityThe supplier explicitly provides customization from samples, customization from designs, full customization, minor customization, and flexible customization. ODM service is also available, giving direct evidence of broad customization support.

Product Q&A

Q:Are you a factory or trading company?

We are a manufacturer. Warmly welcome to visit our factory.

Q:What kinds of products can you make?

We are offering products made by 95%/99.5%/99.7% alumina, zirconia and steatite.

Q:Is it available to provide customized products?

90% of our products are custom-made, so your special demands are always welcome.

Q:How soon can I get the price?

Nornally, we quote within 24 hours after your full inquiry arrives. The full inquiry should include a drawing with technology requirements and your purchase quantity. If you can inform us what is the part used in, that will help to make our quotation more accurate.

Q:How long is your delivery time?

Generally it will 21-35 days, but it varies on the different designs and quantities.