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Fine Ceramic Materials

High-Purity Zirconia

We provide zirconia powders of high-purity and high-quality, that are manufactured by hydrolysis method.
Amongst other fine ceramics, zirconia ceramic has various features such as excellent flexural strength, toughness and wear resistance, and also oxygen-ionic conductivity.

Typical grades

Partially Stabilized Zirconia

KZ-3YF type C

This is a standard type of zirconia powder made of Y2O3 of 3mol% dispersed and dissolved uniformly.
It is suitable for injection molding and casting thick parts because of its small specific surface area.
Also, this zirconia powder can be compatible in dispersion with other raw materials and can be used as an additive for compound materials like ZTA.(Zirconia Toughened Alumina)

KZ-3YF type NF-S

These are zirconia powders made of Y2O3 of 3mol% that are uniformly dispersed and dissolved. A sintered body which can be sintered in a low temperatures, and has a great low temperature degradation. It is suitable for injection molding or extrusion molding, it is mainly used as raw materials for optical fiber connection for ferrule and sleeves.

KZ-3YF(SD) type T-D

This is a binder added type, suitable for press molding and CIP molding. It is also suitable for manufacturing thick-walled products, thanks to its small specific surface area and great formability.
In addition, it is characterized as generating fewer chippings while processing molded bodies.

KZ-3YF(SD) type AZ

This zirconia powder which contains alumina dispersed uniformly realizes excellent strength. (20% higher than our zirconia)
It is great at resistance to Low Thermal Degradation(LTD) and wear. So, it can be good for structural components such as chemical pumps and sliding parts.

High-Fracture-Toughness Zirconia


This is a binder-added grade which improves fracture toughness(2.4times higher than our conventional grade) without degrading strength that is a feature of zirconia.
Suppressing the generation and growth of cracks enhances the stability of strength(Weibull Coefficient is 50「-」,making this zirconia suitable for components required high reliability.
A variety of sintered body colors are available in addition to the base color, white.

High Purity Zirconia (Un-stabilized)


This is high-purity zirconia powder without stabilizing agents. It has a high-refractive ratio and can be used as a refractive ratio adjuster for optical lenses. It is also used as an additive for other materials, such as electric components and ceramic substrates.

Product line-up characteristics example
- (Partially or Fully) Stabilized Zirconia

Partially Stabilized Zirconia Fully stabilized
Grades KZ-3YF type C KZ-3YF type NF-S KZ-8YF
Powder characteristics
Y2O3(wt%) 5.4 5.8 13.3
Al2O3(wt%) 0.25 0.25 0
Specific surface area(m2/g) 9 15 2-15
Characteristics of sintered substance (at 1450℃)
Sintered density(g/cm3) 6.07 6.07 5.90
Flexural strength (MPa) 1000 1000 250
Hardness(GPa) 12.5 12.5 12.5
Molding Methods Injection, extrusion, and casting Injection, extrusion Injection, extrusion, and casting
Partially Stabilized Zirconia(with binders)
Grades KZ-3YF(SD) type T-D KZ-3YF(SD) Type AZ Zadeite
Powder characteristics
Y2O3(wt%) 5.4 4.4 5.4
Al2O3(wt%) 0.25 20 0.25
Specific Surface Area (m2/g) 8 8 8
Characteristics of sintered substance(at 1450℃)
Sintered density(g/cm3) 6.07 5.45 6.07
Flexural strength(MPa) 1100 1300 1100
Hardness(GPa) 12.5 13.5 11.0
Fracture toughness(MPa・√m) 5 5.5 12
Molding Methods Die-press CIP

The above are representative values and cannot be guaranteed.

- Unstabilized zirconia

Grades KZ-0Y KZ-0Y-L KZ-0Y-LSF
Y2O3(mol%) 0 0 0
Powder characteristics
ZrO2(wt%) 99.9 99.9 99.9
Al2O3(wt%) 0.001 0.001 0.001
SiO2(wt%) 0.01 0.01 0.01
TiO2(wt%) 0.005 0.005 0.005
Fe2O3(wt%) 0.005 0.005 0.005
Specific surface area(m2/g) 5 10 10
D50(μm) 17 17 0.2
Primary particle size (nm) 150-250 80-120 80-120
Usage examples Vapor deposition materials Electric Components Electric Components

The above are representative values and cannot be guaranteed.

Technical Sales Group, Sales Department

  • Phone : +81-52-661-3185
  • FAX : +81-52-652-3346