Electrical and Sensor Porcelain: Reliable Insulating Ceramics for Electrical Equipment and Instrumentation

What Electrical Porcelain Delivers

• High dielectric strength (typically > 15 kV/mm on dense bodies) and volume resistivity above 10¹² Ω·cm, ensuring safe isolation in switchgear, terminal blocks and fuse holders

• Low dielectric loss across power and radio frequencies for capacitor supports, RF insulators and antenna components

• Dimensional stability over temperature — porcelain does not creep, sag or deform the way organic insulators do, which matters in heaters and motor housings

• Resistance to tracking and arc erosion, a key safety factor in outdoor insulators and medium-voltage assemblies

• Decades of proven field reliability at a lower cost than many advanced-ceramic alternatives

Sensor Porcelain: Where Precision Meets the Process

Sensor-grade ceramics wrap measurement elements in environments that destroy electronics: exhaust-gas oxygen sensors, NTC and RTD temperature-sensor housings, humidity and pressure sensor substrates, and level-sensor guides. Requirements include tight tolerances (±0.02 mm achievable after grinding), matched thermal expansion with sensor materials, and hermetic, non-outgassing surfaces. Freceramic produces these components in 95% and 99% alumina and cordierite bodies, supplied as-fired or precision-ground.

Custom Shapes Without Customs Headaches

From spacer discs and terminal beads to multi-bore feedthroughs and grooved insulators, most electrical porcelain parts are custom geometries. Freceramic works directly from customer drawings, offers prototyping on existing tooling, and supports volume production with consistent lot-level quality control under its ISO 9001 system.

About Freceramic

Yixing Furui'en Special Ceramics Co., Ltd. produces electrical and sensor porcelain, ceramic sheets, tubes, rods, substrates and cordierite ceramics for OEMs in electrical equipment, instrumentation, heating and automotive industries. With 30+ years of history, ISO 9001 certification and EU pollution-free material testing, the company ships custom insulating ceramics worldwide — contact Freceramic with your specification.