About Zirconia Ceramics (ZrO)2)
Zirconia generally refers to zirconium dioxide, with the chemical formula ZrO2It is the main oxide of zirconium, which is white, odorless and tasteless crystal under normal condition, and is difficult to dissolve in water, hydrochloric acid and dilute sulfuric acid.
Unlike conventional ceramics, which tend to harden and become brittle, zirconia has a high degree of strength, wear resistance and flexibility that far exceeds that of most other technical ceramics. Zirconia is a very strong industrial ceramic with excellent properties in terms of hardness, fracture toughness and corrosion resistance, which is why it is sometimes referred to as “ceramic steel”.
Zirconia is available in several common grades, the most common being yttrium oxide partially stabilized zirconia (Y-PSZ) and magnesium oxide partially stabilized zirconia (Mg-PSZ). Its unique resistance to crack propagation and high thermal expansion make it an excellent material for joining ceramics to metals such as steel.
Density of zirconia ceramics:
The theoretical density of pure zirconia is 5.89g/cm³, but pure zirconia ceramics are prone to cracking at about 1100℃. Therefore zirconia ceramics need to add yttrium oxide as a stabilizer to achieve stability at room temperature, so yttrium oxide partially stabilized zirconia ceramics have a density of 6.05g/cm³.
Hardness of zirconia ceramics:
Zirconia ceramics are a very strong, advanced ceramic with a Vickers hardness of 1250, and its fracture toughness is so good that it can be used to make a wide variety of knives and ceramic parts.
Zirconia structural ceramics.
Zirconia Ceramic Rods
Diameter accuracy up to ±0.001mm
Magnesium stabilized zirconia ceramic rings
Customized magnesium stabilized zirconia ceramic parts
Zirconia Ceramic Pins
Non-standard customized processing
Zirconia Ceramic Parts
High fracture toughness and wear resistance
Black Zirconia Structural Parts
Structure can be customized and processed
Zirconia Ceramic Cutter
Customized various non-standard cutter
Zirconia Ceramic Ring
High temperature and wear resistance
Magnesium stabilized zirconia ceramic blocks
Good precision and high strength
Zirconia Ceramic Fixed Knife
High hardness and wear resistance
View MoreZirconia Ceramic Parts
Performance Characteristics of Zirconia Ceramics
Advantages and disadvantages of zirconia ceramics
Mechanical Properties of Zirconia Ceramics
| sports event | unit (of measure) | Zirconia Ceramics | Magnesium partially stabilized zirconia | ZTA |
|---|---|---|---|---|
| color | -- | fig. reactionary | yellow (color) | fig. reactionary |
| intensity | g/cm³ | 6.05 | 5.7 | 4.1~4.38 |
| durometer | GPa | 12.5 | 11.8 | 15 |
| compressive strength | MPa | 2100 | 1750 | 2350 |
| bending strength | MPa | 850 | 900 | 700 |
| Fracture toughness | MPa・m1/2 | 4~5 | >7.0 | 3.5 |
| Young's modulus | GPa | 200 | 200 | 310 |
| Poisson's ratio | -- | 0.30 | 0.30 | 0.26 |
Thermal Properties of Zirconia Ceramics
| sports event | unit (of measure) | Zirconia Ceramics | Magnesium partially stabilized zirconia | ZTA |
|---|---|---|---|---|
| Maximum operating temperature | ℃(without mechanical load) | 1000 | 1000 | 1500 |
| Thermal conductivity@25℃ | W/(m・K) | 2 | 2.2 | 20 |
| Coefficient of linear thermal expansion | 40 - 400°C, x 10-6/C | 10 | 10.2 | 8 |
| specific heat | J/(kg・K) | 460 | 400 | 720 |
| thermal shock resistance | ℃ (into water) | 300 | 350 | 300 |
Electrical Characteristics of Zirconia Ceramics
| sports event | unit (of measure) | Zirconia Ceramics | Magnesium partially stabilized zirconia | ZTA |
|---|---|---|---|---|
| dielectric constant | 1MHz | 30 | 28 | 10.2 |
| Dielectric strength (6.35mm) | ac-kV/mm | 9.0 | 9.4 | 9.0 |
| dielectric loss | 1MHz | 16 x 10-4 | 10 x 10-4 | 20 x 10-4 |
| Volume Resistance@25℃ | Ω・cm | ＞1013 | ＞1012 | ＞1014 |
| Volume Resistance@500℃ | Ω・cm | ＞103 | ＞103 | ＞104 |
Note: All the above parameters are typical values for zirconia ceramics and may vary from batch to batch.
What are the uses of zirconia ceramics?
- Wire forming/drawing dies;
- Insulated rings for thermal processes;
- Precision shafts in high wear environments;
- Furnace treatment tubes;
- Abrasion-resistant pads;
- Thermocouple protection tubes;
- Sandblasting nozzles;
- Refractory materials;
- Extrusion molds;
- Bushings and covers;
- Kiln furniture crucibles;
- Fiber optic ferrule and sleeve;
- Knives and blades;
- Fuel cell parts;
- Bearings and rollers;
- Weld nozzles and pins;
- Laser parts;
- Gas igniter;
- Electrical insulators;
- Ceramic guides;
- Oxygen Sensor;
- Medical and surgical components;
- Mechanical seals;
- Pumps, pistons and cylinder liners.
Domestic Zirconia Manufacturers
Zhihao Ceramics is a professional zirconia ceramics manufacturer and processor in China. Since 2013, we have participated in and supplied more than 3,000 kinds of precision ceramic products to hundreds of companies.
We can provide you with ceramic machining, ceramic materials, ceramic casting, ceramic metal encapsulation and surface metallization services, and are committed to providing products and services that meet or exceed our customers' quality requirements.
Zirconia Ceramics Processing
To Good Ceramics is your zirconia ceramics custom fabrication specialist for your advanced ceramics prototyping needs. We are always happy to utilize our years of experience in advanced ceramics to advise on materials, designs and applications. If you are looking to purchase aluminum oxide plates, rods, tubes, or custom machined parts, please contact us and each of our experts will be happy to assist you.
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