| Catalogue Code | IN-07 |
| CAS No. | 114168-16-0 |
| Chemical Formula | Xwt.%Y2O3/Ywt.%ZrO2 |
| Compound Name | Yttria/ Zirconia |
| Particle size d50 (μm) | 40-60µm |
| Purity (%) | >99.8% |
Introduction
Yttria, Y2O3, and zirconia, ZrO2, are two significant oxides that, in different weight percentages, form a highly tough composite material characterized by excellent mechanical and thermal properties. Such materials have high strength, toughness, and thermal shock characteristics, which provide prime features that make yttria-stabilized zirconia useful in the ceramics and aerospace fields. Yttria doping stabilizes the zirconia at high temperatures and improves ionic conductivity, critical for electrolytic and spray grade applications. Varying the ratios of X wt.% Y₂O₃ and Y wt.% ZrO₂ allows these composites to be made to order for specific performance needs, and it is this that underlines their utility in advanced engineering and manufacturing processes.
Properties
The properties of both the compounds and their composite are mentioned in the table below:
| Properties | Aluminum Oxide (Al₂O₃) | Titanium Oxide (TiO₂) | Composite (X wt.% Al₂O₃ / Y wt.% TiO₂) |
| Chemical Formula | Y2O3 | ZrO2 | Y₂O₃/ZrO₂ |
| Molar Mass | 225.81 g/mol | 123.22 g/mo | Varies based on composition |
| Appearance | Powder | Powder | Powder |
| Hardness (Mohs scale) | 5-6 | 8-9 | Intermediate |
| Density | ~5.01 g/cm³ | ~6.05 g/cm³ | Varies based on their ratio |
| Chemical Stability | High | High | High |
| Thermal Conductivity | Moderate | Moderate | Varies based on composition |
| Ionic Conductivity | High | Moderate | High (especially in YSZ) |
| Chemical Stability | High | High | High |
Applications
The applications of the yttria/zirconia composite are employed in various fields due to their extraordinary properties, such as yttria density and yttria crystal structure. Some of their application fields are as follows:
- Wear-Resistant Coatings: Coating of Yittria/zirconia composite protects valves, pumps, and rollers subjected to high wear, extending the lifespan of components in mining, manufacturing, and material handling.
- Cutting Tools and Wear-Resistant Coatings: Used for formulating high-performance cutting tools, possessing excellent hardness and resistance to wear and thermal shock.
- Electrical Applications: YSZ is an electrolyte in SOFCs due to its high ionic conductivity and stability under reducing and oxidizing conditions.
- Aerospace Components: Aerospace components, such as turbine blades, are coated with thermal barrier materials to improve their performance under extreme conditions.
- Glass Manufacturing: Used in making specialty glasses that enhance mechanical and thermal properties.
- Catalysts and Catalytic Supports: They are used in chemical processes because they are more stable and can withstand catalytic reactions.
FAQs
Answere: Because of stabilization, yttria doped in zirconia increases its tetragonal phase and ionic conduction, improving its mechanical properties for high-temperature applications.
Answere: Yes, the composites display good thermal stability and are highly useful at hot and cold temperatures.
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