Mica Sheets Category

High-Performance Thermal & Electrical Insulation — Four Grades

Four engineered mica sheet grades covering every industrial insulation challenge — from series overview and heavy-duty 5-50mm structural boards to eco-friendly SGS-certified natural mica and ultra-pure 99%+ synthetic fluorophlogopite. Temperature range 500-1200°C, dielectric strength up to 25 kV/mm, muscovite and phlogopite options.

◆ Category Overview

Product Grades4

Temperature Range500–1200°C

Thickness RangeThin–50mm

Dielectric Strength20–25kV/mm

Custom Tolerance±0.1mm

Export Countries30+

Our Product Range

Four Engineered Grades — Matched to Your Application

Each grade is purpose-built for specific temperature, purity, and precision requirements. Click through for full specifications and technical data sheets.

1200°C Series

Overview

◆ Complete Series · All Grades

Mica Sheet (Series)

Full series overview covering muscovite (500°C / 700°C peak) and phlogopite (750-1000°C / 1200°C peak). Rigid and flexible forms available.

◆ Heavy-Duty · ISO 9001

Thick Mica Sheet

5-50mm customizable thickness for demanding industrial applications. UL94 V-0 + ISO 9001 certified. For furnace linings, battery thermal barriers.

◆ Natural · SGS Asbestos-Free

Natural Mica Sheet

Sourced from high-quality natural mica ore. SGS asbestos-free certified. Laser cutting customization. For EV battery insulation, electronics, building materials.

◆ Ultra-Pure · Lab-Made

Synthetic Mica Sheet

99%+ pure lab-synthesized fluorophlogopite. ±0.1mm precision. Ultra-low tan δ 0.001-0.002. For EV battery fire barriers, HV 110kV+, aerospace.

Cont/Peak1000/1200 °C

Side-by-Side Comparison

Which Grade Matches Your Application?

Compare all four grades at a glance. Click any column header to visit the full product page with complete TDS.

Property	Mica SheetSeries	Thick Mica SheetHeavy-Duty	Natural Mica SheetNatural	Synthetic Mica SheetLab-Made
Material Source	Natural / Synthetic	Muscovite / Phlogopite	100% Natural OreSGS certified	99%+ Pure SyntheticLab-controlled
Thickness Range	Standard	5–50 mmHeavy-duty custom	Multiple natural	Standard + ±0.1mm
Continuous Temp	500–1000 °C	500–1000 °C	500–1000 °C	1000 °CStable long-term
Peak Temperature	Up to 1200 °C	1200 °C	700 °C	1200 °C
Dielectric Strength	>25 kV/mm	≥25 kV/mm	25 kV/mm	20 kV/mm
tan δ @ 50Hz	Standard	Standard	Standard	0.001–0.002Ultra-low loss
Water Absorption	< 1%	< 1%	< 1%	< 1%
Flame Retardancy	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Key Certification	UL94 V-0	ISO 9001	SGS Asbestos-Free	UL94 V-0
Cutting Method	CNC / Die-cut	CNC / Water-jet	Laser Cutting	±0.1mm Precision
Best For	General selection	Furnace linings, HV transformers	EV battery, electronics, construction	EV fire barriers, HV 110kV+, aerospace
Relative Cost	Varies	Premium	Most economical	Premium

◆ Decision Helper

Not Sure Which Mica Sheet Grade You Need?

Match your application scenario to the right product. If your use case isn't listed here, contact our engineering team — we'll recommend the best grade within 24 hours.

◆ If You Want To explore the full series across muscovite and phlogopite grades?

First-time mica sheet buyer
Multiple applications planned
Rigid + flexible both needed
Wide temperature range (500-1200°C)

Start With

Mica Sheet Series

View Overview

◆ If You Need Heavy-duty 5-50mm structural insulation for demanding industrial use?

Furnace lining panels
New energy battery thermal barriers
HV transformer coil support
Heavy machinery gearboxes

Recommended

Thick Mica Sheet

View Product

◆ If You Need SGS-certified asbestos-free natural material with laser cutting?

EV battery thermal insulation
High-temperature equipment sealing
Electronics component isolation
Building decoration materials

Recommended

Natural Mica Sheet

View Product

◆ If You Need Ultra-pure 99%+ synthetic with ±0.1mm precision for critical applications?

EV battery fire barriers (UL94 V-0)
HV transformers 110kV+
Aerospace cable insulation
Custom precision components

Recommended

Synthetic Mica Sheet

View Product

Why SZX Mica Sheets

What Sets Our Sheet Manufacturing Apart

Fifteen years of mica expertise, both natural ore sourcing and synthetic lab production, precision laser/CNC cutting, and strict batch-level QC for global B2B supply.

Dual Manufacturing Routes

Both natural mica ore processing (for cost-effective general use) and laboratory synthesis of fluorophlogopite (for ultra-pure premium applications) — matched to your performance and budget target.

Precision Laser & CNC Cutting

±0.1mm tolerance CNC stamping, laser cutting, and die-cutting. CAD-based custom shapes for EV battery module covers, aerospace components, and HV transformer barriers.

Multi-Certification Verified

UL94 V-0 flame retardant, SGS asbestos-free, IEC 60371-3, ISO 9001, RoHS, and REACH certifications. Third-party laboratory reports for automotive, aerospace, and HV approvals.

Export-Ready Packaging

Moisture-barrier wrapping, corner protection, HS-code labeling, and full export documentation. Sea, air, and express courier shipping to 30+ countries worldwide.

Who Uses Our Mica Sheets

Trusted by Engineers Across Nine Industries

From foundry induction furnaces to aerospace systems — our mica sheets insulate every major industrial sector where thermal and electrical performance are critical.

EV Battery Packs

Fire barriers, module covers, thermal runaway prevention

Foundry Induction Furnaces

Sliding surface insulation for coreless induction furnaces

HV Transformers 110kV+

Insulation barriers and coil separators for HV equipment

Aerospace Systems

Cable insulation from -50°C to 1000°C extreme range

Home Appliances

Toasters, hair dryers, microwaves — heating element insulation

HV Switchgear

Arc chutes, phase separators, dielectric barriers

Metallurgy & Smelting

Melting furnace linings, observation window insulation

Heating Equipment

Heater plate substrates, electric heating insulation

Electronics Industry

Vacuum tubes, transistors, IC insulating separators

Frequently Asked

Mica Sheets Buyer's Guide

The most common questions from engineers and procurement teams evaluating our mica sheet range.

Natural mica sheet is sourced directly from high-quality mica ore, preserving natural physical and chemical properties. More economical, with SGS asbestos-free certification — ideal for EV battery insulation, electronics, and building materials. Synthetic mica sheet is lab-synthesized fluorophlogopite with 99%+ purity, no natural impurities, and ultra-low dielectric loss (tan δ 0.001-0.002). Handles 1200°C peak temperature with ±0.1mm precision — premium choice for HV transformers 110kV+, aerospace, and EV fire barriers.

Choose muscovite (silver white, 500°C continuous / 700°C peak) for standard applications below 600°C — more economical. Choose phlogopite (gold, 750-1000°C continuous / 1200°C peak) for high-temperature applications above 600°C — industrial furnaces, metallurgy, aerospace. Both offer water absorption < 1% and dielectric strength > 20 kV/mm with UL94 V-0 certification.

Standard mica sheet series covers a wide range of thicknesses. Thick Mica Sheet offers 5-50mm customizable thickness specifically for heavy-duty use. All grades support custom processing — laser cutting (Natural grade), CNC stamping/cutting/forming with ±0.1mm tolerance (Synthetic grade), plus die-cutting. Upload your CAD drawings for ready-to-install custom parts.

For critical EV battery fire barriers requiring UL94 V-0 compliance and precision shapes, we recommend Synthetic Mica Sheet — 99%+ pure, 1200°C peak, ±0.1mm tolerance for module cover plates. For cost-sensitive battery thermal insulation with SGS asbestos-free certification, Natural Mica Sheet with laser cutting is ideal. For battery pack thermal barriers requiring 5-50mm structural thickness, choose Thick Mica Sheet.

For standard stock items (common thickness/size in mica sheet series): MOQ ~500 kg, lead time 3-7 days. For custom synthetic mica or thick mica sheet (custom thickness, die-cut shapes, CAD-based parts): MOQ 500 kg-1 ton depending on grade, lead time 15-25 days. Rush production available with small surcharge. For ongoing OEM customers, we offer VMI (vendor-managed inventory) with monthly consolidated shipments.

ISO 9001 quality management, UL94 V-0 flame retardant, SGS asbestos-free tested, IEC 60371-3 (mica content/density), IEC 60243-1 (dielectric strength), RoHS, and REACH environmental compliance. Our synthetic grade is manufactured to IATF 16949-aligned processes for automotive OEM customers. Third-party laboratory reports available for automotive, aerospace, and HV (110kV+) applications.