ZIRCONIA POWDER
Zirconia is tough because it has a tetragonal structure that precipitates a stress induced phase transformation near an advancing crack tip. This expands the structure on impact and absorbs energy. At higher temperatures the structure reforms causing 3-7% dimensional expansion and loss of strength.The properties of the tetragonal structure can be controlled by blending it with other materials to balance toughness and strengthFor example, zirconia is commonly blended with a stabilizer such as Magnesia,(MgO), Calcia, (Lime, CaO) or Yttria (Y2O3) in order to facilitate transformation toughening. Instead of a fully tetragonal structure, this creates a partial cubic crystal structure during initial firing that remains metastablePartially stabilized zirconia or PSZ with about 3.5% Magnesia (MgO) is high in toughness and strength even at elevated temperatures with a larger grain structureYttria stabilized zirconia is partially stabilised with about 5.4 Yttria (Y2O3). It is also known as tetragonal zirconia Polycrystal or TZP and it has the finest grain size of all the zirconia materials we offer.These grades exhibit the highest toughness and strength at room temperature because they are nearly 100% tetragonal but this degrades between 200 and 500°C as these irreversible crystal transformations also cause dimensional change.Suntek Material offers a full series of Partially Stabilized Zirconia powders for making of high quality structural ceramics products.
MgO Partially Stabilized Zirconia:
Technical data Grade | ZrO2+HfO2 % | MgO % | Fe2O3 % | Na2O % | TiO2 % | Cl- % | BET SSA m2/g | LOI % | D50 (um) | Remark |
MSZ-8.0 | / | 2.7+/-0.2 | <0.005 | <0.001 | <0.001 | <0.01 | 8-20 | <0.5 | <2.0 | White |
MSZ-10.0-G | / | 3.5+/-0.2 | <0.005 | <0.05 | <0.001 | <0.02 | 8-20 | <4.0 | / | White |
Technical data Grade | ZrO2+HfO2 % | MgO % | Al2O2 % | SiO2 % | Fe2O3 % | TiO2 % | CaO % | LOI % | Remark |
MSZ-F | 96 | 3.20 | 0.02 | 0.02 | 0.02 | 0.10 | 0.02 | 0.20 | Yellow |
MSZ-F-G | 96 | 3.20 | 0.02 | 0.02 | 0.02 | 0.10 | 0.02 | 0.20 | Yellow |
Y2O3 Partially Stabilized Zirconia:
Tec hnical data Grade | ZrO2+HfO2 % | Y2O3 % | Al2O3 % | Si2O % ≤ | Fe2O3 % ≤ | TiO2 % ≤ | Na2O % ≤ | LOI % ≤ | BET SSA (m2/g) | D50 (um) | Remark |
YSZ-3.0 | 94 | 5.4+/-0.25 | 0.23+/-0.02 | 0.015 | 0.003 | 0.002 | 0.005 | 1.0 | 5-20 | <0.8 | White |
YSZ-3.0-G | 94 | 5.4+/-0.25 | 0.23+/-0.02 | 0.02 | 0.005 | 0.002 | / | 5.0 | 5-20 | <1.0 | White |
YSZ-3.0B | 89.5 | 4.95+/-0.25 | 0.23+/-0.02 | 0.05 | / | 0.01 | 0.01 | 1.0 | 11-15 | 1.0 | Black |
YSZ-3.0B-G | 89.5 | 4.95+/-0.25 | 0.23+/-0.02 | 0.05 | / | 0.02 | 0.02 | 5.0 | ≤ 15 | 1.4 | Black |
YSZ-4.0 | 92 | 7.2+/-0.25 | / | 0.02 | 0.003 | 0.002 | 0.005 | 1.0 | / | 1.0 | White |
YSZ-8.0 | 86 | 13.25+/-0.25 | / | 0.02 | 0.003 | 0.002 | 0.005 | 1.0 | / | 1.0 | White |
Zirconia Toughed Alumina:
Technical data Grade | ZrO2+HfO2 % | Al2O3 % | LOI % | Loose density (g/cm3) | BET SSA % | D50 (um) |
ZTA-G | 25 | 74.5 | 1 | 0.98 | 7.2 | 1.0 |
ZIRCONIA POWDER
Zirconia is tough because it has a tetragonal structure that precipitates a stress induced phase transformation near an advancing crack tip. This expands the structure on impact and absorbs energy. At higher temperatures the structure reforms causing 3-7% dimensional expansion and loss of strength.The properties of the tetragonal structure can be controlled by blending it with other materials to balance toughness and strengthFor example, zirconia is commonly blended with a stabilizer such as Magnesia,(MgO), Calcia, (Lime, CaO) or Yttria (Y2O3) in order to facilitate transformation toughening. Instead of a fully tetragonal structure, this creates a partial cubic crystal structure during initial firing that remains metastablePartially stabilized zirconia or PSZ with about 3.5% Magnesia (MgO) is high in toughness and strength even at elevated temperatures with a larger grain structureYttria stabilized zirconia is partially stabilised with about 5.4 Yttria (Y2O3). It is also known as tetragonal zirconia Polycrystal or TZP and it has the finest grain size of all the zirconia materials we offer.These grades exhibit the highest toughness and strength at room temperature because they are nearly 100% tetragonal but this degrades between 200 and 500°C as these irreversible crystal transformations also cause dimensional change.Suntek Material offers a full series of Partially Stabilized Zirconia powders for making of high quality structural ceramics products.
MgO Partially Stabilized Zirconia:
Technical data Grade | ZrO2+HfO2 % | MgO % | Fe2O3 % | Na2O % | TiO2 % | Cl- % | BET SSA m2/g | LOI % | D50 (um) | Remark |
MSZ-8.0 | / | 2.7+/-0.2 | <0.005 | <0.001 | <0.001 | <0.01 | 8-20 | <0.5 | <2.0 | White |
MSZ-10.0-G | / | 3.5+/-0.2 | <0.005 | <0.05 | <0.001 | <0.02 | 8-20 | <4.0 | / | White |
Technical data Grade | ZrO2+HfO2 % | MgO % | Al2O2 % | SiO2 % | Fe2O3 % | TiO2 % | CaO % | LOI % | Remark |
MSZ-F | 96 | 3.20 | 0.02 | 0.02 | 0.02 | 0.10 | 0.02 | 0.20 | Yellow |
MSZ-F-G | 96 | 3.20 | 0.02 | 0.02 | 0.02 | 0.10 | 0.02 | 0.20 | Yellow |
Y2O3 Partially Stabilized Zirconia:
Tec hnical data Grade | ZrO2+HfO2 % | Y2O3 % | Al2O3 % | Si2O % ≤ | Fe2O3 % ≤ | TiO2 % ≤ | Na2O % ≤ | LOI % ≤ | BET SSA (m2/g) | D50 (um) | Remark |
YSZ-3.0 | 94 | 5.4+/-0.25 | 0.23+/-0.02 | 0.015 | 0.003 | 0.002 | 0.005 | 1.0 | 5-20 | <0.8 | White |
YSZ-3.0-G | 94 | 5.4+/-0.25 | 0.23+/-0.02 | 0.02 | 0.005 | 0.002 | / | 5.0 | 5-20 | <1.0 | White |
YSZ-3.0B | 89.5 | 4.95+/-0.25 | 0.23+/-0.02 | 0.05 | / | 0.01 | 0.01 | 1.0 | 11-15 | 1.0 | Black |
YSZ-3.0B-G | 89.5 | 4.95+/-0.25 | 0.23+/-0.02 | 0.05 | / | 0.02 | 0.02 | 5.0 | ≤ 15 | 1.4 | Black |
YSZ-4.0 | 92 | 7.2+/-0.25 | / | 0.02 | 0.003 | 0.002 | 0.005 | 1.0 | / | 1.0 | White |
YSZ-8.0 | 86 | 13.25+/-0.25 | / | 0.02 | 0.003 | 0.002 | 0.005 | 1.0 | / | 1.0 | White |
Zirconia Toughed Alumina:
Technical data Grade | ZrO2+HfO2 % | Al2O3 % | LOI % | Loose density (g/cm3) | BET SSA % | D50 (um) |
ZTA-G | 25 | 74.5 | 1 | 0.98 | 7.2 | 1.0 |
