1. Phase of Zirconia(ZrO2)
Zirconia has three phase: monoclinic phase(m-ZrO2), tetragonal phase(t-ZrO2) and cubic phase(c-ZrO2). The phase can be changed under different temperature as below:
2. Density of Zirconia(ZrO2) in different phase
m-ZrO2: 5.65g/cm3
t-ZrO2: 6.1g/cm3
c-ZrO2: 6.27g/cm3
3. Why Zirconia need Stabilized?
During a heating or cooling process, zirconium oxide will undergo a phase transformation process. The change in volume associated with this transformation will lead a crack of zirconia, which makes the usage of pure zirconium oxide in many applications impossible. To overcome this kind of defect, some materials are added to maintain the zirconia phase. These materials called stabilizer and related product named Stabilized Zirconia.
4. Common Zirconia Stabilizer
Common used Zirconia Stabilizers include Y2O3, CeO2, CaO and MgO etc. The most common and effective stabilizer is Y2O3. The stabilized zirconia called Yttria-Stabilized Zirconia, Cerium-Stabilized Zirconia, Calcia-Stabilized Zirconia, Magnesia-Stabilized Zirconia accordingly.
5. Preparation of Stabilized Zirconia
ALB’s Stabilized Zirconia is prepared by chemical co-precipitated method.
Stabilized zirconia production flow chart:
6. Commercial available stabilized zirconia from ALB
Item No. |
Description |
Purity |
Inquiry($, USD) |
PSZ-5.5Y |
Yttria (3 mol%) Stabilized Zirconia |
Zr(Hf)O2: 94.5% wt; |
|
PSZ-5.5YS |
Yttria (3 mol%) Stabilized Zirconia |
Zr(Hf)O2: 94.5% wt; |
|
PSZ-8.5YS |
Yttria (5 mol%) Stabilized Zirconia |
Zr(Hf)O2: 91.5% wt; |
|
PSZ-13.5Y |
Yttria (8 mol%) Stabilized Zirconia |
Zr(Hf)O2: 86% wt; |
|
PSZ-13.5YS |
Yttria (8 mol%) Stabilized Zirconia |
Zr(Hf)O2: 86% wt; |
|
PSZ-3M |
Magnesia Stabilized Zirconia |
Zr(Hf)O2 96% wt; |
|
PSZ-4C |
Calcia Stabilized Zirconia |
Zr(Hf)O2 95% wt; |
|
PSZ-10Ce |
Cerium Stabilized Zirconia |
Zr(Hf)O2 89.5% wt; |
|
PSZ-20Ce |
Cerium Stabilized Zirconia |
Zr(Hf)O2: 79.5% wt; |
Nano Yttria-Stabilized Zirconia is also available:
Yttria Stabilized Zirconia (YSZ) Nanopowder, Nanoparticles, 50nm, 99.9 %, 3mol %
Yttria Stabilized Zirconia (YSZ) Nanopowder, Nanoparticles, 50nm, 99.9 %, 5mol %
Yttria Stabilized Zirconia (YSZ) Nanopowder, Nanoparticles, 50nm, 99.9 %, 8mol %
Specification of Yttria-Stabilized Zirconia:
Item No. |
PSZ-5.5Y |
PSZ-5.5YS |
PSZ-8.5YS |
PSZ-13.5YS |
Phase |
3Y tetragonal |
3Y tetragonal |
5Y tetragonal |
8Y cubic |
Zr(Hf)O2 (wt %) |
94.5 |
94.5±0.3 |
91.5 |
86 |
Y2O3 (wt %) |
5.2±0.2 |
5.2±0.2 |
8.5±0.2 |
13.5±0.2 |
Al2O3 % ≤ |
0.01 |
0.01 |
0.01 |
0.01 |
SiO2 %≤ |
0.01 |
0.01 |
0.01 |
0.01 |
Fe2O3 %≤ |
0.01 |
0.01 |
0.01 |
0.01 |
CaO %≤ |
0.005 |
0.005 |
0.006 |
0.005 |
MgO %≤ |
0.005 |
0.005 |
0.005 |
0.005 |
TiO2 %≤ |
0.002 |
0.002 |
0.002 |
0.002 |
Na2O %≤ |
0.005 |
0.004 |
0.005 |
0.005 |
Cl- %≤ |
0.1 |
0.1 |
0.1 |
0.1 |
Loss on ignition %≤ |
0.8 |
0.8 |
0.8 |
0.8 |
Specific surface area(m2/g) |
~15 |
7-9 |
7-9 |
7-9 |
Average particle size (um) |
0.5-1.0 um |
<1.0 um |
0.5-1.0 um |
0.5-1.0 um |
8. Application of Stabilized Zirconia
Stabilized zirconia is used as a grinding media and engineering ceramics due to its increased hardness and high thermal shock resistivity. Stabilized zirconia is also used in applications such as oxygen sensors and solid oxide fuel cells due to its high oxygen ion conductivity.
Link to this article: https://www.albmaterials.com/knowledge/introduction-of-stabilized-zirconia.html