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We are supplying [ zirconia beads ]
and [ zilconium silicate
beads ] as zirconia-based beads for pulverization
and dispersion.
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 Features |
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| High purity: |
There is very little
possibility of contamination with impurities
such as Fe2O3, SiO2,
and MgO affecting the properties of dispersed
materials |
| High strength: |
Depending on the
high strength of tetragonal zirconia ceramics,
breakage or fracture occur few. |
| High precision: |
Few presence of
irregular shaped beads such as oval beads or
dumbbell -shaped beads leads to the higher efficiency
of pulverization and dispersion. |
| High density: |
The highest density
of all ceramics materials (over 6.0) achieves
high efficiency of pulverization and dispersion. |
| No contamination: |
High wear resistance
minimizes the contamination of pulverized or
dispersed materials with beads. |
| High toughness: |
The fracture toughness
is more than 5 times greater than that of alumina,
which is on the highest level in the industry. |
| High wear resistance: |
Smooth surface
and wear resistance bring the stability and efficiency
of production. |
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| Applications |
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Torayceram* beads and balls
can be used in grinding and dispersing applications.
Also microgrinding and microdispersing efficiency
has been achieved in micro media size.
Typical applications is as follows. |
- Electronic components(Ceramic capasitors,
Thermistors, Varistors)
- Electronic materials(LCD color paste, PDP
glass paste,CMPslurry etc.)
- Inorganic powder such as ceramics
- Magnetic coating materials (VTR, Audio,
Computer recording media)
- Ink, Pigment, Paint
- Heat sensitive materials
- Food additives
- Others
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| Standard
Size of Beads |
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 0.03mm*,0.05mm*
, 0.1mm
,0.2mm
, 0.3mm
, 0.4mm
, 0.5mm
0.65mm
, 0.8mm
, 1.0mm
, 1.25mm
, 1.5mm
1.75mm
, 2.0mm
, 2.35mm
, 2.5mm
3.0mm
, 4.0mm
, 5.0mm
, 10mm |
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| *In this instance,please contact
us separately. |
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| HIP-Processed
Beads |
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| HIP processing is a technology
of sintering beads and balls in nonactive gas
atmosphere(like nitrogen), with pressure applied
on them. HIP processing increases crushing strength.
We can offer HIP-processed items for every size
of Torayceram* beads. With this processing, their
color of appearance becomes dark gray. |
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| Chemical
Composition |
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| The material of Torayceram*
beads and balls is mainly tetragonal zirconia
made from zirconium oxide to which yttrium oxide
is
added,
achieving the highest strength of all ceramics
materials. Furthermore, they are almost free
from contamination of impurities such as SiO2,
Fe2O3 and MgO.
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| Material |
Composition
ratio(wt%) |
| ZrO2 (+HfO2) |
94.75±0.60 |
| Y2O3 |
4.90±0.50 |
| Al2O3 |
0.30±0.10 |
| Fe2O3 |
 0.01 |
| SiO2 |
0.01 |
| TiO2 |
0.01 |
| Na2O |
0.01 |
| MgO |
0.01 |
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| Physical
Properties |
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Torayceram
Beads |
| Pressureless Sintering |
High Pressure Hiping |
| Density(g/cm3) |
6.0 |
6.06 |
| Color |
White |
Gray |
| Microhardness(Vickers hardness
: Hv) |
1150-1200 |
1200-1250 |
| Young's Modulus (GPa) |
210-220 |
210-220 |
| Moduluds of Rapture(MPa) |
1000 |
1500 |
| Average Grain Size(μm) |
0.3-0.4 |
0.3-0.4 |
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