1. Product Overview

Our corrugated alumina ceramic stand-off insulators are manufactured from 99% high-purity alumina powder and fired under ultra-high temperature. Each insulator is pre-embedded with brass or steel nuts during molding for stable assembly. The multi-rib corrugated design greatly extends creepage distance, effectively preventing flashover and leakage current under high voltage, humid or dusty working environments.

With glossy white insulating glaze, the ceramic insulator features excellent heat resistance, strong mechanical strength and outstanding dielectric properties. It is widely used as isolation support components for high & low voltage control cabinets, inverters, busbars, circuit breakers, PV energy storage converters and industrial heating machines.

We support full customization of dimension, thread size, rib layers and surface marking, with stable bulk supply for global electrical equipment manufacturers.

2. Core Product Advantages

• Dense 99% Alumina Substrate: Zero internal pores, high breakdown voltage, no electric leakage for long-term operation.
• Multi-Rib Creepage Design: Optimized rib structure extends insulation path, perfect for dirty, moist industrial environments.
• Integrated Embedded Metal Inserts: Nuts co-fired with ceramic body, strong tensile force, not easy to fall off during installation.
• Anti-Pollution White Glaze: Hydrophobic, dust-proof, resistant to acid, alkali and salt fog corrosion.
• Ultra Wide Temperature Adaptability: Stable performance from -40℃ low temperature to 1200℃ high temperature, fits heat-generating machinery.
• Flexible Customization Service: Custom height, outer diameter, thread standard and logo marking according to customer drawings or samples.

3. Complete Technical Specifications

• Raw Material: 99% Al₂O₃ High Alumina Ceramic
• Outer Appearance: Multi-layer corrugated white stand-off insulator
• Built-in Hardware: Brass nut / Carbon steel nut
• Applicable Voltage: 0.6kV ~ 35kV AC & DC
• Continuous Working Temp: -40℃ ~ 1200℃
• Surface Finish: Smooth glossy white insulating glaze
• Outstanding Properties: High dielectric strength, wear resistance, anti-aging, impact resistance
• Compliance: International electrical insulation ceramic industry standards

Hunan Yuanhong New Material Co.,Ltd was established in 2016 ,there are over 100 sets of ceramic professional equipments , several types of furnace in more than 8000 square meters production workshops. ISO9001 certified, a variety of advanced ceramic materials are ROHS and REACH certified.

CNC Workshop

Dry Pressing Workshop

Polishing Machine

Zirconium Oxide Furnace

FAQ

Q1: Can this ceramic holder replace wooden guide block directly?

A1: Yes, we can produce same size as your original wooden block, direct replacement without modifying machine.

Q2: Is it resistant to cooling liquid and acid lye?

A2: 99 alumina ceramic has excellent chemical stability, completely resistant to common drawing cooling fluid, acid and alkali liquid.

Q3: Do you accept small trial order?

A3: Yes, small batch sample order is welcome for customer test.