High Purity Calcined Mica/Dehydrated Mica for Industrial Applications

A comprehensive guide to Calcined Mica/Dehydrated Mica — parameters, process flow, certifications, advantages, real-world cases & more.

Calcined Mica/Dehydrated Mica: Industrial Grade Sheet

1. Industry Overview: Calcined Mica/Dehydrated Mica Market Trends & Growth

According to Grand View Research (2023), the global mica market reached a value of USD 567.3 million in 2022, with calcined/dehydrated mica accounting for over 25% of specialty mica demand. Notably, the Asia-Pacific region led the market due to rapid growth in energy, chemical, and electronics sectors.

Annual CAGR (2022-2027): 4.7%
Key application segments: petrochemical, metallurgy, power insulation, waterproof coatings
Top consuming nations: China, India, Germany, USA
Compliance standards: ISO 9001:2015, ANSI/ASTM D351, RoHS for electrical/industrial grade

Calcined Mica/Dehydrated Mica has seen a surge in demand due to superior thermal, chemical, and dielectric properties versus natural and muscovite mica. This positions it as the premium choice for high-performance industrial applications.

2. Technical Parameters − Specification Table

Parameter	Calcined Mica/Dehydrated Mica	Natural Mica	Synthetic Mica	Industry Standard
Color	Pearl white/yellowish	Pale grey/greenish	Colorless/gray	ASTM D351
Dielectric Strength (kV/mm)	>35	22-28	30–40	ISO 4743
Thermal Conductivity (W/m·K)	0.25–0.35	0.18–0.32	0.22–0.31	ISO 22007-2
Moisture (%)		0.6–2.1		GB/T 3035
Acid Resistance (%)	>98	88–92	>99	ISO 1776
Particle Size (μm)	10–625	20–1040	10–640	ISO 13320
Bulk Density (g/cm³)	0.36–0.52	0.3–0.48	0.34–0.51	GB/T 8074
Flexural Strength (MPa)	140–205	80–160	140–210	ISO 178
Volume Resistivity (Ω·cm)	≥1x10¹³	≥4x10¹²	≥8x10¹³	IEC 60093

3. Process Flow: Calcined Mica / Dehydrated Mica Manufacturing Explained

1. Raw Mica Selection

2. Washing & Initial Drying

3. Calcination at 800–950°C
Moisture & Volatiles Removal

4. Controlled Cooling

5. Grinding & Classifying

6. Quality Inspection & Packaging

Key inspection nodes: All stages strictly tested for moisture content, particle size, dielectric property per ISO/IEC/ANSI standards; Sampling ratio: 1:2000kg.

Calcined Mica/Dehydrated Mica – High-temp Calcination Line

Core Material: Premium quality natural mica flakes (muscovite/phlogopite)
Technologies used: High-precision rotary kilns, enclosed micro-pulverizing
Processing types: Casting, high-T annealing, CNC particle sorting
Testing standards: ISO 9001:2015, ANSI/IEC, internal 48h salt spray corrosion test

4. Technical Advantages & Certification

Superior thermal resistance: Endures up to 950°C, optimal for power, metallurgy and insulation.
Low moisture/permeability: 2O residual, ensuring exceptional dielectric strength.
Enhanced chemical stability: Resistant to acids, alkalis and most solvents; longevity 2x that of raw mica.
Precision particle grading: Supports mesh 10–800 for customizable performance in coatings, plastics, etc.
Industry compliance: ISO 9001, IEC 60371-certified; RoHS and REACH conformant.
Extensive lifetime: Field data show 8–12 year average lifecycle in thermal insulation, 20% longer vs. standard mica.

Learn more about Calcined Mica/Dehydrated Mica

Calcined Mica/Dehydrated Mica: CNC Graded Micro-flakes

5. Data Visualization: Parameter Trends & Product Comparison

Trend evolution of critical indices: Dielectric Strength & Acid Resistance, plus market adoption by industry

6. Manufacturer Comparison: Technical Strengths at a Glance

Manufacturer	Origin	Certifications	Minimum Order (kg)	Customization	Key Advantage
Kehuimica	China	ISO 9001:2015, IEC, RoHS	1000	Particle size, packing	Large-scale rotary kiln, 24h QC
Elementis Mica	UK/Germany	ISO, ANSI, REACH	1500	Color, grading	European raw mine, stable supply
Orosilber Industrial	India	ISO, SGS	1200	Mesh size	Value pricing, local service
Premier Mica	USA	ASTM, RoHS	1200	Color, packaging	Direct supply to major OEMs

7. Custom Solutions: Tailoring Calcined Mica/Dehydrated Mica for Your Project

Custom particle gradation: Mesh 10–800, 99%+ pass-through control
Special coatings: For enhanced acid/alkali resistance (electroplating, anti-corrosion, etc.)
Surface activation: Quartz/magnesium/epoxy activation available
CNC micronizing: Particle size precision ±2 μm, ideal for plastics/composites
OEM/ODM labeling: Multi-language, export-compliant packaging

Over 15 years of experience, Kehuimica has delivered custom engineered Calcined Mica/Dehydrated Mica to 38+ countries, serving over 600+ global partners.

Calcined Mica/Dehydrated Mica: Custom Packaging & Labeling

8. Application Cases: Real-World Scenarios for Calcined Mica/Dehydrated Mica

Case 1: Anti-corrosion Lining in Oil Refineries
In 2022, a leading Southeast Asia oil refinery applied over 17 tons of Calcined Mica/Dehydrated Mica in lining cement, achieving:

Corrosion rate reduced by 41% vs. glass fiber only
Insulation resistance improved 23%
Seamless, long-term integrity after 18 months per ISO 22196 monitoring

Case 2: Power Cable Fillers
2023 project for a German cable OEM replaced talc with calcined mica fillers in high-voltage cables:

Dielectric breakdown improved by avg. 8.6 kV/mm
Zero moisture-induced short-circuit incidents during year-round tests
Cable lifespan extension projected 13% over industry mean

Case 3: Plastics & Masterbatch Manufacturers
East Asia manufacturers leveraged dehydrated mica as anti-crack enhancer in ABS/PA resins:

Reduced microcracking rates by 38%
Surface gloss ≥ 92 GU, 15% improvement over unmodified resin
Meets RoHS & FDA food-grade standards for container111 manufacture

9. Professional FAQ – Calcined Mica/Dehydrated Mica Key Technical Concepts

Q1: What is the difference between calcined mica and natural mica in industrial applications?

A: Calcined Mica/Dehydrated Mica undergoes high-temperature treatment (800–950°C), removing bound water and volatile impurities, which increases dielectric strength, reduces moisture to

Q2: Which particle size ranges are typical and what industries use them?

A: Ranges from 10μm to 625μm. Coarse grades (400–600μm) are ideal for construction/insulation, while fine grades (

Q3: What are the international standards for quality?

A: Key standards: ISO 9001 (quality management), ASTM D351 (mica specification), IEC 60371 (electrical insulation), and RoHS/REACH for eco regulations. EU/US clients may require FDA/UL listing.

Q4: How is product installation standardized in coatings/linings?

A: Standard practice: Mix into polymer or cementitious matrix as per ASTM C150/C595 or ISO 22196. For coatings, ensure uniform dispersion, mesh size ≤ 250μm. Comply with safety and environmental control protocols.

Q5: What is the typical delivery cycle & packaging mode?

A: Most manufacturers offer 10–20 days lead time for standard grades (packing 25–1000kg, double PE/PP lined bags or jumbo bags). OEM custom service may extend delivery by 5–7 days.

Q6: How is product tested for performance?

A: Routine tests use IEC 60093 (resistivity), ISO 4743 (dielectric), and in-lab 48h acid/alkali immersion. Field samples compared against ASTM or client benchmarks, with 100% QC traceability.

Q7: What after-sales support/warranty is provided?

A: Professional suppliers offer quality guarantee 1–2 years, with on-site technical consult, 48h QA response, and rapid logistics support (trackable shipments, emergency re-dispatch if required).

10. Fulfillment, Warranty & Customer Trust

Lead time: 10–20 days typical, 95% on-time delivery (2023 data, Kehuimica internal reports)
Warranty: 1–2 years product quality warranty; batch-tracked, root-cause tracing for complaints
Support: 7×24h technical consulting, custom formulation guidance, export documentation
Clients served: 600+ global clients; Fortune-500 OEMs, Top-20 energy/petrochemical groups
Certified by: ISO 9001:2015, RoHS, ASTM, with reference supplies to LKAB Minerals, BASF group, etc.
Traceability: All outgoing batches retain min. 4-year sample for ex post quality investigation.

11. References & Further Reading

Grand View Research, "Mica Market Size Report, 2023". Read
Ceramic Industry Forum, “Calcined Mica and its Industrial Applications 2022”, Read
Materials Performance Journal (NACE), “Corrosion Resistance of Dehydrated Mica in Anti-corrosive Coatings”, Read
ASTM Standard D351, “Standard Specification for Mica”, Read
China Non-metallic Minerals Industry Forum, “趋势洞察：脱水云母在新材料领域的突破”(2023)