Key Features

Six Properties That Define Our Phlogopite Mica Tube

Gold-grade natural phlogopite mica delivers superior high-temperature stability and electrical isolation compared to standard muscovite — making it the premium choice for transformers, HV systems, and corrosive environments.

◆ 01

Strong High-Temperature Resistance

Phlogopite mica tube withstands working temperatures up to 800°C — suitable for extreme environments including industrial furnaces, engine bays, and thermal processing equipment.

◆ 02

High-Voltage Isolation

Excellent electrical insulation with voltage rating ≤20 kV — effectively prevents electrical short circuits in high-voltage systems, safeguarding equipment integrity.

◆ 03

Superior Corrosion Resistance

Resistant to moisture and chemical corrosion — performs reliably in humid or corrosive environments. Ideal for marine, chemical processing, and outdoor applications.

◆ 04

Strong Pressure Tolerance

Withstands large currents and high-voltage operating conditions — ensures equipment safety during sustained electrical load. Critical for transformers and HV switchgear protection.

◆ 05

Wide Working Temperature Range

Operates reliably from -40°C to 800°C — covers both extreme cold and high-heat environments. Suitable for automotive under-hood, aerospace, and outdoor electrical applications.

◆ 06

Flexible Color & Custom OD

Available in transparent, white, and gray colors with customizable outer diameter to match your specific wire/rod size. Ready-to-install precision tubes for OEM integration.

Technical Specifications

Core Technical Parameters

Every phlogopite mica tube is manufactured from high-quality natural gold mica, delivering consistent performance across four key specification dimensions. Custom OD available on request.

Natural Mica

Material Composition

High-quality natural phlogopite mica (gold color). Preserves the inherent excellent high-temperature and electrical insulation properties of natural mica minerals.

Natural mica source
Gold phlogopite grade
No synthetic additives

-40 to 800°C

Working Temperature

Operating range from -40°C to 800°C covers both extreme cold and high-heat environments. Maintains dimensional stability and electrical performance across full temperature range.

Min: -40°C (arctic)
Max: 800°C (furnaces)
Wide thermal cycling

≤ 20 kV

Electrical Performance

Voltage rating up to 20 kV — effectively handles high-voltage isolation requirements in transformers, switchgear, and HV power distribution systems.

HV isolation: ≤ 20 kV
Low leakage current
High insulation resistance

3 Colors + Custom

Color & Dimensions

Three standard colors available (transparent, white, gray) to match your product aesthetics. Outer diameter fully customizable to your exact specification — no compromise on fit.

Transparent · White · Gray
Outer Ø: Custom to order
Ready-to-install

Core Applications

Five Industries That Specify Phlogopite Mica Tube

Gold-grade phlogopite mica tube delivers premium high-voltage isolation and heat resistance — the specified choice for transformers, HV equipment, and electronic protection across industries.

Electrical Insulation Protection

Protects wires, conductors, and electrical components from short circuits and arc faults. Essential insulation barrier in electrical distribution panels, control cabinets, and industrial machinery.

Transformer Insulation

Sleeves for transformer windings, bus bars, and lead wires. Withstands high operating temperatures inside transformer housings while providing reliable ≤20 kV voltage isolation.

Cable Protection

Outer protective sleeving for high-temperature cables in industrial environments. Resists friction, heat, and chemical corrosion — extending cable service life significantly.

HV Equipment Isolation

Critical isolation component in HV switchgear, circuit breakers, and HV power distribution equipment. Handles voltages up to 20 kV with excellent long-term dielectric stability.

Electronic Component Encapsulation

Protective sleeving for sensitive electronic components, sensors, and vacuum tube leads. Shields components from thermal, electrical, and environmental stress during operation.

Compare Mica Tube Options

Explore Our Full Mica Tube Range

Phlogopite is our premium gold-grade option. For cost-sensitive applications below 600°C, consider muscovite. For extreme 1000°C environments, we offer synthetic mica tubes on request.

◆ Full Range

Mica Tube (Series Overview)

Complete overview of our mica tube range with specifications, sizing guide, and material selection chart. The ideal starting point for first-time buyers.

View Series

◆ Up to 600°C

Muscovite Mica Tube

Natural white muscovite mica tube. More economical alternative for 400-600°C applications. Ideal for home appliances and low-voltage electrical equipment.

View Specifications

◆ Up to 1000°C

Synthetic Mica Tube (Custom)

Lab-synthesized ultra-pure mica tube for extreme 1000°C environments. For aerospace, nuclear reactors, and precision electronics. Made to order.

Request Quote

Phlogopite Mica Tube — 800°C Gold Mica Insulation Sleeve