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Zirconia Alumina

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Zirconia Alumina Specification

Form
Powder / Granules

Hardness (%)
Mohs 9

Surface Finish
Rough / Gritty

Application
Grinding, Abrasive Tools, Refractories, Sandblasting, Cut-off Wheels, Coated and Bonded Abrasives

Usage & Applications
Abrasives, Refractory Casting, Sandblasting, Cutting Tools

Purity(%)
>99%

Chemical Composition
Al2O3 (alumina): 60-70%, ZrO2 (zirconia): 30-40%

Water Absorption
Negligible

Density
4.6 Gram per cubic centimeter(g/cm3)

Melting Point
1900C to 2200C

Product Type
Zirconia Alumina

Types of Refractories
Synthetic Refractory

Shape
Grains / Grits

Porosity
Low

Dimensional Stability
Excellent under high temperature

Strength
High mechanical strength

Specific Gravity
3.5 - 4.6 g/cm

Thermal Conductivity
Low

Color
Blue

Refractoriness
Up to 1750C

Toxicity
Non-toxic

Friability
Moderate

Packaging
Bags, drums, or bulk

Particle Size
Varies from fine powder to coarse granules (typically 16 mesh to 240 mesh)

Shelf Life
Indefinite under dry storage conditions

Resistant to Corrosion
Excellent against alkalis and acids

Thermal Expansion Coefficient
7.8 x 10 /C

Bulk Density
1.8 - 2.2 g/cm

About Zirconia Alumina

Being a well known firm in the global market, we are affianced in providing an excellent quality Zirconia Alumina. Demanded as an additive in continuous casting refractories, offered product is suitable for manufacturing large grinding wheels. The provided product is produced by fusing zirconium quartz sand and alumina with the aid of cutting-edge furnaces under experts supervision. This Zirconia Alumina is available in various packaging options for our global clients at affordable prices.

Features:

Hard dense structure
Rigidness
Longer life
Good thermal stability

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. Its 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

Superior Thermal Stability

Zirconia Alumina demonstrates remarkable refractoriness, withstanding temperatures up to 1750C, and maintains its dimensional stability even under rigorous thermal conditions. This makes it exceptionally suitable for refractory linings, high-temperature casting, and environments where constant thermal exposure is a concern. Its low thermal expansion coefficient helps prevent cracking and distortion, ensuring structural integrity throughout repeated heating and cooling cycles.

Outstanding Abrasive Performance

With a Mohs hardness of 9 and high mechanical strength, Zirconia Alumina delivers consistent abrasive actionmaking it indispensable in grinding, sandblasting, and the manufacture of coated and bonded abrasives. These grains possess moderate friability, allowing for controlled breakdown and renewal of cutting edges during use, which enhances longevity and utility in abrasive tools and cut-off wheels.

Corrosion and Chemical Resistance

This material is highly resistant to both alkalis and acids, which equips it for use in corrosive environments encountered in industrial and process applications. The synthetic composition, combined with a purity exceeding 99%, ensures long-lasting service life and minimal deterioration in chemically aggressive settings, reducing maintenance requirements and maximizing operational efficiency.

FAQs of Zirconia Alumina:

Q: How is Zirconia Alumina typically used in industrial applications?

A: Zirconia Alumina is widely used for abrasive purposes such as grinding, sandblasting, and in the production of cut-off wheels, coated, and bonded abrasive tools. Its high refractoriness and corrosion resistance also make it a preferred choice for refractory casting and components exposed to extreme heat and aggressive chemicals.

Q: What benefits does Zirconia Alumina offer compared to conventional abrasives?

A: Compared to traditional abrasives, Zirconia Alumina provides higher mechanical strength, a superior cutting action due to its Mohs hardness of 9, and excellent thermal and chemical stability. This results in longer-lasting abrasive tools, better surface finishes, and reduced downtime for maintenance and replacements.

Q: Where can Zirconia Alumina be sourced and in what forms is it available?

A: Zirconia Alumina is supplied by exporters, importers, and suppliers in India and internationally. It is available as grains, grits, powders, or granules, and is typically packaged in bags, drums, or bulk shipments to suit various industrial requirements.

Q: What precautions should be taken during the storage of Zirconia Alumina?

A: Zirconia Alumina should be stored in a dry environment to preserve its indefinite shelf life and to prevent moisture-induced agglomeration or degradation. Proper packaging, such as sealed bags or drums, helps maintain its quality and usability over extended periods.

Q: How does the moderate friability of Zirconia Alumina influence its performance in abrasive tools?

A: The moderate friability of Zirconia Alumina allows controlled self-sharpening of abrasive particles. As the grains fracture under stress, new sharp edges are exposed, ensuring continuous abrasiveness and effective cutting action throughout the tools use.

Q: What distinguishes Zirconia Aluminas chemical and physical properties for refractory applications?

A: Its combination of high alumina and zirconia content, excellent dimensional stability, low porosity, and negligible water absorption makes Zirconia Alumina a standout material for refractory uses, offering reliable performance at sustained high temperatures and in chemically harsh settings.

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