Top 7 Grades of Zircon Powder: Zr-P5, ZrS5, Zr-325 and HL Series Explained for Manufacturers

Introduction

When it comes to ceramic, refractory, and foundry industries, choosing the right zircon powder grade can significantly affect your product performance and manufacturing efficiency. Whether you're sourcing zirconium silicate for tiles, glazes, or high-temperature applications, understanding each grade's properties is crucial.

In this blog, we’ll break down the top 7 zircon powder grades, including Zr-P5, ZrS5, Zr-325, Zr-200, and the HL Series (HL-50, HL-40, HL-20) — all developed by trusted zircon flour manufacturing companies in India. This guide is designed for manufacturers in the UK, Italy, Poland, Turkey, and beyond who demand consistency, performance, and global supply assurance.

What Is Zircon Powder and Why Is It Used?

Zircon powder, primarily made of zirconium silicate (ZrSiO₄), is a fine, white mineral powder widely used in:

• Ceramic tile manufacturing

• Sanitaryware and glazes

• Refractories and castables

• Foundry molds and coatings

• Abrasive and thermal barrier applications

It enhances whiteness, opacity, chemical stability, and thermal resistance in industrial materials — making it indispensable in many global manufacturing sectors.

Why Source Zircon from Indian Manufacturers?

India is a major global hub for zirconium silicate manufacturing, offering high-quality raw materials, modern infrastructure, and cost-effective export solutions. Top exporters like Astron Group have earned trust worldwide for delivering consistent zircon products that meet industry-specific technical specifications.

Top 7 Zircon Powder Grades Explained

1. Zr-P5

• Purity: High zirconium content

• Mesh Size: Fine (typically 325 mesh)

• Applications: Ceramic glazes, tile bodies

• Benefit: Superior whiteness and gloss

Zr-P5 is preferred by European and Middle Eastern ceramic tile manufacturers due to its consistency in whiteness and particle distribution.

2. ZrS5

• Purity: Ultra-high with low silica content

• Applications: Specialty ceramics, sanitaryware

• Benefit: Optimized for high-end glaze formulation

This grade is a step above Zr-P5 for precision-oriented glazing in premium tiles and ceramic ware.

3. Zr-325

• Mesh Size: 325 mesh micronized powder

• Applications: Foundry, refractories, glass

• Benefit: Excellent thermal stability

Zr-325 is a go-to option for foundry and refractory applications in markets like Turkey and Poland, where high heat resistance is essential.

4. Zr-200

• Mesh Size: 200 mesh

• Applications: Casting, abrasive materials

• Benefit: Balance of performance and cost

Zr-200 is favored by mid-scale manufacturers needing zircon for manufacture in general industrial applications.

5. HL-50

• Series: Part of the proprietary HL Series

• Applications: Tile glaze, structural ceramics

• Benefit: Enhanced suspension and dispersion

HL-50 is a customized zirconium silicate solution optimized for large-volume tile producers in Italy and Spain.

6. HL-40

• Applications: Refractories and frits

• Benefit: High bonding strength under temperature

HL-40 is ideal for high-temperature kiln applications, ensuring structural integrity of linings and castables.

7. HL-20

• Applications: Budget-sensitive ceramic products

• Benefit: Competitive pricing with good quality

Used by mass tile producers seeking a balance between cost and basic performance — often in emerging markets like Nepal and Bangladesh.

How Zircon Powder Is Manufactured

At Astron Group, we follow advanced zirconium silicate manufacturing protocols:

1. Sourcing high-grade zircon sand

2. Micronizing to controlled mesh sizes

3. Calcination for purity enhancement

4. Magnetic and chemical impurity removal

5. Testing for whiteness, particle size, and loss on ignition (LOI)

Every batch is tested for industrial compliance, ensuring it meets the standards of our clients across Europe, the Middle East, and Asia.

Export Capabilities & Global Reach

As a trusted zircon flour manufacturing company in India, Astron Group exports to:

• United Kingdom – sanitaryware and tableware

• Italy – ceramic tiles and glazes

• Turkey – refractories and ceramics

• Poland – foundry and industrial use

• Other markets: Bangladesh, Myanmar, Spain, Sri Lanka

We offer custom packaging, export documentation support, and on-time delivery to global ports.

Frequently Asked Questions

❓ What is zircon for manufacture?

Zircon for manufacture refers to zircon powders processed for use in industrial production — especially ceramics, refractories, and glass.

❓ How is zirconium silicate different from zircon flour?

Zirconium silicate is the mineral composition (ZrSiO₄), while zircon flour is the powdered form of that mineral used in manufacturing.

❓ Which zircon grade is best for ceramic tiles?

Zr-P5, ZrS5, and HL-50 are widely used for ceramic tile glazes due to their opacity and whiteness.

Final Thoughts

Selecting the right zircon powder grade is essential for achieving durability, aesthetics, and performance in ceramics and industrial materials. From Zr-P5 and ZrS5 to our flexible HL Series, Astron Group offers a complete portfolio of zircon products to meet the demands of global manufacturers.