Premium Ceramic Flux

Feldspar Alkali Flux

KAlSi3O8 / NaAlSi3O8

The essential flux mineral — critical for glass and ceramic manufacturing with superior melting properties and alkali content.

12%+ Alkali
Flux Agent
Low Iron
ISO Certified
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10+Grades
6+Industries
30+Countries
30+Years
Feldspar - 20 Microns
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Product Overview

About Feldspar

Understanding the fundamentals of feldspar

Product Overview

The Essential Ceramic Flux

Feldspar is an aluminum silicate containing potassium, sodium, or calcium — the most important flux material in glass and ceramic manufacturing.

Its alkali content (K₂O + Na₂O) lowers the melting temperature of ceramic and glass batches, while providing alumina for strength and durability in the final product.

Pegmatite Granite Aplite
KAlSi3O8 / NaAlSi3O8

Chemical Formula

Feldspar

Chemical Properties
  • K2O + Na2O12-15%
  • Al2O3 Content18-20%
  • SiO2 Content65-70%
  • Fe2O3<0.1%
Physical Properties
  • Mohs Hardness6-6.5
  • Specific Gravity2.55 – 2.63
  • Melting Range1150-1250°C
  • WhitenessVariable
12%+
K2O+Na2O
<0.1%
Fe2O3
Flux
Function
ISO
Certified

Natural Flux

Essential natural flux for ceramics and glass.

NaturalEssentialSustainable
Feldspar mineral deposits
Natural Source

From Pegmatite Deposits
to Premium Flux

Sourced from high-quality pegmatite deposits and processed to deliver consistent alkali content and low iron.

1 Billion+Tons Global Reserve
30+Years Processing
4+Mining Sites
High alkali content
Low iron
Consistent quality
Essential flux
Global supply
Advantages

Key Benefits

Why feldspar is the preferred choice for industry leaders worldwide

01

Flux Action

Lowers melting temperature of ceramic and glass batches, reducing energy costs.

02

High Alkali Content

12-15% K₂O + Na₂O provides effective fluxing action in ceramic bodies.

03

Low Iron Content

Less than 0.1% Fe₂O₃ ensures clear glass and white ceramic bodies.

Feldspar
12%+Alkali
6Key Benefits
6+Industries
04

Strength & Durability

Alumina content improves mechanical strength and chemical resistance.

05

Translucency

Contributes to translucency in porcelain and vitrified products.

06

Cost Effective

Essential and economical flux material for ceramic production.

Industrial manufacturing excellence
World Class Quality

Industry-Leading Performance
at Every Scale

Trusted by leading manufacturers across 50+ countries for consistent, high-purity feldspar that meets international standards.

ISO 9001 EcoVadis Gold REACH Compliant Lab Certified
ISO Certified
Global Supply
Lab Tested
Industry Leading
Product Range

Available Grades

Comprehensive range of feldspar grades for diverse industrial applications

Precision quality testing of feldspar grades

Precision Engineered Grades

Every grade is meticulously tested in our state-of-the-art laboratories to meet the most demanding industrial specifications worldwide.

K2O+Na2O12%+
Fe2O3<0.1%
FunctionFlux
CertifiedISO
Most Popular
Ceramic

Ceramic Grade Feldspar

High Alkali

Premium feldspar for porcelain, sanitaryware, and technical ceramics.

  • 12%+ alkali
  • Low iron
  • Consistent
Learn More
Glass

Glass Grade Feldspar

Low Iron

Low-iron feldspar for clear container and flat glass production.

  • <0.05% Fe2O3
  • High purity
  • Controlled sizing
Learn More
Filler

Filler Grade Feldspar

Abrasive

Ground feldspar for fillers, mild abrasives, and specialty applications.

  • Controlled hardness
  • Consistent sizing
  • Multi-purpose
Learn More
Dental

Dental Grade Feldspar

Ultra-Pure

High-purity feldspar for dental porcelain and prosthetics.

  • Ultra-pure
  • Controlled fusion
  • Medical grade
Learn More
Product Statistics
4Grade Categories
10+Product Variants
VariousMesh Sizes
Request Custom Grade
ISO 9001 Certified Global Delivery Technical Support Custom Solutions
Applications

Industries & Applications

Versatile applications across diverse industry verticals worldwide

Ceramics

Ceramics

Essential flux in porcelain, sanitaryware, tiles, and technical ceramics.

PorcelainTilesSanitaryware
25%Body Content
Glass Industry

Glass Industry

Flux and alumina source for container, flat, and specialty glass.

ContainerFlat GlassSpecialty
15%Batch Content
Dental Porcelain

Dental Porcelain

High-purity feldspar for dental prosthetics and restoration.

ProstheticsCrownsVeneers
HighPurity
Floor & Wall Tiles

Floor & Wall Tiles

Critical flux for vitrified and porcelain tiles.

VitrifiedPorcelainWall Tiles
30%Content
Sanitaryware

Sanitaryware

Essential component in sanitaryware bodies and glazes.

ToiletsBasinsBodies
20%Loading
Electrical Porcelain

Electrical Porcelain

Flux for high-voltage insulators and electrical ceramics.

InsulatorsHVTechnical
KeyIngredient
6+Industries
10+Applications
30+Countries
400+Customers

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Our experts help you find the perfect grade

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Our Promise

Why Choose 20 Microns?

World-class quality minerals backed by decades of expertise & innovation

20 Microns state-of-the-art manufacturing facility

Years of
Excellence

ISO 9001
Premium Flux
Quality
Certified

Our feldspar is sourced from premium pegmatite deposits and processed to deliver consistent alkali content, low iron, and optimal particle size for ceramic and glass applications.

Premium Quality

High-quality pegmatite deposits

Advanced Processing

Magnetic separation and sizing

Consistent Quality

Batch-to-batch reliability

Technical Support

Expert application assistance

Start Your Journey With Us
Key Metrics
4+Processing Plants
30+Countries Served
400+Happy Customers
30+Years Experience
EcoVadis Gold Sustainability Rating
12%+Alkali Content
R&DInnovation
24/7Logistics
ExpertSupport
Knowledge Base

Frequently Asked Questions

Get answers to common questions about Feldspar

Knowledge Center

Find detailed answers about specifications, applications, and technical details.

4Questions
24/7Support
TechnicalApplicationsGradesQuality

Still Have Questions?

Our team is here to help

Contact Us
01

Why is feldspar essential for ceramics?

Feldspar acts as a flux that lowers melting temperature of ceramic bodies and glazes, reducing energy costs while providing alumina for strength and durability.

Flux Alkali Essential
02

What is the difference between potash and soda feldspar?

Potash feldspar (Orthoclase) contains more K₂O and has a higher melting range. Soda feldspar (Albite) contains more Na₂O and melts at lower temperatures.

Potash Soda Mixed
03

Why is low iron important?

Low iron (<0.1% Fe₂O₃) is critical for clear glass and white ceramic bodies. Iron causes unwanted coloration in the final product.

Clear Glass White Body Quality
04

What particle sizes are available?

We offer feldspar in various mesh sizes from 100 to 400 mesh, tailored for specific ceramic and glass applications.

Coarse Medium Fine

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Our technical experts are available to provide detailed answers

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Industry Applications

Product Applications

Feldspar serves as a critical input across diverse industrial sectors worldwide

01

Ceramics

Flux in porcelain and ceramic bodies.

02

Glass

Batch ingredient for glass making.

03

Tiles

Essential for vitrified tiles.

04

Sanitaryware

Bodies and glazes.

05

Dental

Dental porcelain.

06

Electrical

Insulator porcelain.

07

Abrasives

Mild abrasive applications.

08

Fillers

Specialty filler applications.

8+Application Sectors
10+Product Grades
30+Countries Served
400+Industry Clients
Feldspar industrial applications worldwide
Global Industrial Reach

Powering Industries Across
50+ Countries

From cosmetics to oil & gas — feldspar is the essential mineral behind thousands of products you use every day.

Need a Specific Grade for Your Application?

Our experts will guide you to the perfect feldspar solution

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Product Video

See It In Action

Watch how 20 Microns' Feldspar powers real-world industrial applications

Feldspar in Action – 20 Microns
YouTube
Official Product Film

Feldspar - Essential Ceramic Flux

20 Microns Limited · Official Channel

About This Video

Discover how 20 Microns' Feldspar grades deliver superior performance across industrial applications.

  • Product manufacturing overview
  • Quality control processes
  • Application demonstrations
  • Global supply capabilities
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Feldspar

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