INDUSTRY COMPONENT

Ceramic Insulator

Ceramic insulator for electrical and thermal insulation in heating elements

Component Specifications

Definition
A ceramic insulator is a specialized component used in heating element assemblies to provide electrical insulation and thermal resistance. It prevents electrical current leakage, withstands high temperatures, and maintains structural integrity in demanding industrial environments. Typically made from alumina, steatite, or cordierite ceramics, it isolates heating coils from conductive housings while allowing efficient heat transfer.
Working Principle
Works by utilizing ceramic material's high dielectric strength and low electrical conductivity to block current flow, while its thermal stability prevents degradation at elevated temperatures. It physically separates conductive elements and dissipates heat through controlled thermal conduction.
Materials
Alumina (Al2O3) 95-99%, Steatite (MgSiO3), Cordierite (2MgO·2Al2O3·5SiO2). Properties: Dielectric strength >10 kV/mm, thermal conductivity 20-30 W/m·K, operating temperature up to 1600°C, low thermal expansion coefficient.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Water Absorption<0.02%
Volume Resistivity>10^14 Ω·cm
Dielectric Strength12 kV/mm
Compressive Strength2000 MPa
Thermal Conductivity25 W/m·K
Operating Temperature-40°C to 1500°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 13006, DIN EN 60672

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Thermal shock cracking
  • Mechanical brittleness
  • Dielectric breakdown under contamination
  • Dimensional instability at extreme temperatures
FMEA Triads
Trigger: Rapid temperature changes
Failure: Thermal stress cracking
Mitigation: Use graded thermal cycling, select materials with low thermal expansion coefficients
Trigger: Mechanical impact during installation
Failure: Fracture or chipping
Mitigation: Implement proper handling procedures, use protective packaging
Trigger: Surface contamination
Failure: Reduced dielectric strength, tracking
Mitigation: Regular cleaning, apply hydrophobic coatings, maintain clean operating environment

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±0.5% on critical dimensions, ±2% on dielectric properties
Test Method
ASTM D149 dielectric strength test, ISO 10545 thermal shock resistance, IEC 60672 material classification

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Ceramic Insulator

4 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

HPS Fencing
Hangzhou, Zhejiang, CN
20,000 square meters
CE ROHS IPX6 CE (TUV)
Listed on the company's own website · profile compiled by CNFX from public sources
Engineering Ceramic Co., Ltd.
Zhengzhou, Henan, CN
Listed on the company's own website · profile compiled by CNFX from public sources
InSealing
Xiamen, Fujian, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Jinghui Ceramic
Hunan, CN
Also makes: Igniter, Loading Arm
Listed on the company's own website · profile compiled by CNFX from public sources

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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Frequently Asked Questions

What temperature can ceramic insulators withstand?

Depending on material grade, ceramic insulators can withstand temperatures from 1000°C to 1600°C continuously, with some special formulations reaching up to 1800°C.

Are ceramic insulators interchangeable between different heating elements?

No, they are typically designed for specific applications due to variations in dimensions, thermal properties, and electrical requirements. Always consult manufacturer specifications.

How do ceramic insulators compare to polymer insulators?

Ceramic insulators offer superior temperature resistance, better dielectric strength at high temperatures, and longer lifespan in harsh environments, though they are more brittle and typically more expensive.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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