Fused Alumina Zirconia

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Fused Alumina Zirconia Specification

Hardness (%)
Mohs 9

Chemical Composition
Al2O3 60-70%, ZrO2 25-40%, SiO2 <1.5%, Fe2O3 <0.3%

Form
grain, lump, powder

Usage & Applications
suitable for bonded abrasives, refractory bricks, coatings

Density
4.2 Gram per cubic centimeter(g/cm3)

Surface Finish
angular, rough

Melting Point
up to 1900C

Water Absorption
very low (<1%)

Application
abrasives, refractory castables, blasting, steel & foundry industries

Purity(%)
>99%

Product Type
synthetic fused refractory raw material

Types of Refractories
shaped and unshaped, fused cast

Shape
grain, powder, granule

Porosity
low

Dimensional Stability
excellent at high temperature

Strength
high mechanical strength

Specific Gravity
4.2 g/cm

Thermal Conductivity
moderate

Color
grey to blue

About Fused Alumina Zirconia

Process of Production and application :

Fused Alumina-Zirconia is produced in a high temperature electrical arc furnace by fusing zirconium quartz sand and alumina. It is characterized by hard dense structure, high toughness, good thermal stability. It's suitable for manufacturing large grinding wheels for steel conditioning and foundry snagging, coated tools and stone blasting, etc.

It is also used as an additive in Continuous casting refractories. Due to its high toughness it is used to provide Mechanical strength in these refractories

Technical Specification :

Brand (Spec)	AZ-25 Index	AZ-25 Typical Value	AZ-40 Index	AZ-40 Typical Value
ZrO₂	23%-27%	24%	38%-42%	39%
AI₂O₃	72% min	74%	56%-60%	59%
SiO₂	0.8% max	0.5%	0.60% max	0.4%
Fe₂O₃	0.3 % max	0.2%	0.3% max	0.15%
TiO₂	0.8% max	0.7%	0.50% max	0.5%
CaO	0.15% max	0.14%	0.15% max	0.12%
True Density (g/cm3)	4.2 min	4.23	4.6 min	4.65
Color	Gray or Fresh grey		Gray or Fresh grey

Outstanding High-Temperature Stability

Fused Alumina Zirconia excels in elevated temperatures, maintaining its integrity with refractoriness under load above 1700C and a melting point up to 1900C. Its low thermal expansion and high mechanical strength make it a preferred material for refractory castables and applications where dimensional stability is essential under harsh thermal conditions.

Superior Corrosion and Wear Resistance

Thanks to its unique chemical composition and high purity, this material demonstrates exceptional resistance to slags, molten metals, and corrosive environments. Coupled with a low porosity and water absorption rate under 1%, it serves reliably in abrasive, blasting, and steel industry settings, ensuring longer service life and reduced maintenance.

Versatile Forms for Multiple Applications

Available as grain, powder, granule, or lump, Fused Alumina Zirconia meets diverse needs across industries. Custom grain sizes are possible, making it suitable for bonded abrasives, refractory bricks, and coatings. Its moderate thermal conductivity and rough surface finish further enhance its adaptability and performance in various demanding roles.

FAQs of Fused Alumina Zirconia:

Q: How is Fused Alumina Zirconia typically used in industry?

A: This material is extensively used in bonded abrasives, refractory bricks, castables, coatings, blasting media, and in steel and foundry operations thanks to its high thermal stability, hardness, and corrosion resistance.

Q: What are the main benefits of using Fused Alumina Zirconia over conventional alumina?

A: Fused Alumina Zirconia offers superior mechanical strength, greater dimensional stability at high temperatures, and higher resistance to corrosion and slag attack, making it suitable for more demanding environments.

Q: When should I choose Fused Alumina Zirconia for my application?

A: Select Fused Alumina Zirconia when your process involves extreme temperatures (above 1700C), exposure to molten metals or corrosive slags, or when high wear resistance and strength are critical for performance.

Q: Where can Fused Alumina Zirconia be sourced and in what packaging options?

A: This material is available from specialized exporters, importers, and suppliers in India, and is typically supplied in 25kg or 50kg bags or packaged as per customer requirements for industrial use.

Q: What is the manufacturing process for Fused Alumina Zirconia grains?

A: Fused Alumina Zirconia is produced by fusing alumina and zirconia at high temperatures, then cooling and crushing the fused mass into specific grain sizes with low friability and consistent angular shapes.

Q: How does the product maintain its performance during storage?

A: Packed in moisture-resistant bags, Fused Alumina Zirconia has a shelf life of 12 months under dry conditions, ensuring it retains low moisture content and excellent quality for industrial processes.

Q: What advantages does the angular, rough surface finish provide?

A: The angular and rough surface of Fused Alumina Zirconia grains enhances their cutting ability and anchoring properties, making them highly effective for abrasives and achieving strong bonding in refractory applications.

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