By AZoNano
Table of Contents
OverviewNanosized
ZirconiaClassification of Zirconia ProductsNano Zirconia3YSZ Partially Stabilized
Zirconia8YSZ and 10YSZ Stabilized Zirconia
About INNOVNANO
Overview
Tetragonal zirconia is a highly important structural ceramic
material having superior mechanical characteristics, increased fracture
toughness, hardness, strength and good chemical resistance. Other interesting
characteristics of Tetragonal Zirconia have resulted in a variety of industrial
applications that include medical prosthetics, cutting tools, dental
reconstruction, synthetic jewels, high density grinding media, wear components,
bearings, seals, valves, nose cones and tiles for space shuttles and missiles,
cigarette filters and many more.
Nanosized Zirconia
Nano
Tetragonal Zirconia with its superplastic deformation and high hardness
levels makes an extremely promising candidate in the field of advanced ceramics.
Property enhancements are also anticipated because of its superior sinter
activity at low temperature offering easy to control grain growth.
The fully
stabilized Zirconia powders are suited for evolving high temperature energy
conversion systems, like solid oxide fuel cells (SOFC) and sensors
(NOx and O2), due to its high oxygen ion transport
capabilities and good long-term stability.
Non
Transformable Tetragonal Zirconia (T'Z) is used broadly in thermal barrier
coating applications due to its relatively high thermal expansion coefficient,
low thermal conductivity and phase stability. Tetragonal
Zirconia has been proved suitable for petrol and diesel engines, turbines
and the most demanding aviation engines.
INNOVNANO offers a complete range of Zirconia Products:
Classification of Zirconia Products
Zirconia products can be widely classified into the following types:
3YSZ Partially Stabilized Zirconia
3YSZ grades are nano structured partially
stabilized Zirconia, producing ceramic bodies with high density and small
grain size.
| Chemical Analysis |
| ZrO2 + Y2O3+ HfO2 (wt%) |
> 99.9 |
| Y2O3 (wt%) |
5.2± 0.2 |
| SiO2 |
< 0.03 |
| Fe2O3 |
< 0.025 |
| Na2O |
< 0.01 |
| Physical Analysis |
| BET (m2/g) |
16± 3 |
| Crystallite Size (nm) |
12 |
| Aggregate size (nm) |
200 |
| Granule (μm) |
60 |
| Primary Particle Size (nm) |
50 |
8YSZ and 10YSZ Stabilized Zirconia
8YSZ and 10YSZ grades are nanostructured
fully stabilized Zirconia, resulting in sintered bodies with high ionic
conductivity and heat insulating properties.
| Chemical Analysis |
|
8YSZ |
10YSZ |
| ZrO2 + Y2O3+ HfO2
(wt%) |
> 99.9 |
> 99.9 |
| Y2O3 (wt%) |
13.3 ± 0.2 |
15.5 ± 0.2 |
| SiO2 |
0.02 |
0.02 |
| Fe2O3 |
0.02 |
0.02 |
| Al2O3 |
< 0.02 |
< 0.02 |
| Na2O |
£ 0.01 |
£ 0.01 |
| Physical Analysis |
| BET (m2/g) |
16 ± 3 |
16 ± 3 |
| Crystallite Size (nm) |
18 |
15 |
| Granule (μm) |
60 |
60 |
| Aggregate Size (nm) |
200 |
200 |
| Primary Particle Size (nm) |
50 |
50 |
| Mechanical Properties |
| Hardness (Hv 10) |
1400 |
1400 |
| Sintering Temperature (°C) |
1400 |
1400 |
| Grain Size (nm) |
<250 |
<400 |
| Sintered Density (g/cm3) |
5.90 |
5.80 |
| Bending Strength (MPa) |
400 |
250 |
| Ionic Conductivity (S/m) |
>4.0 |
>3.0 |
About INNOVNANO
INNOVNANO (part of CUF, the largest Portuguese chemical
group), with its corporate Headquarter located in Lisbon, has developed a unique
and innovative proprietary patented process. The process is defined as
high-pressure semi continuous process for the large-scale production of
nanomaterials and advanced ceramic powders.
Using this technology INNOVNANO is able to produce commercial quantities of metal
oxides, doped metal oxides, and composite nanoparticles in the range of 20 nm to
60 nm.
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This information has been sourced, reviewed and adapted from
materials provided by INNOVNANO.
For more information on this source, please visit INNOVNANO.