Ceramic
- Alumina Al2O3
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Alumina is sintered at 1,500~1,700℃ and it has a good hardness, strength, excellent wear resistance, corrosion resistance and electrical insulation properties. Therefore, it is regarded as a representative material of advanced ceramics widely used in not only the electrical and electronic area but also high temperature, mechanical, chemical and precision measurement areas.Since the price is relatively competitive, mass production is available. And also, it can be applied to various areas such as liners, guide, seal for the water taps, instruments for chemical experiments, various fixtures and insulators, heat resistance products, etc.
- Zirconia ZrO2
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Partially Stabilized Zirconia (PSZ) is, generally, used which added small amount of rare earth oxide. Its sintered body has high strength, excellent corrosion resistance, wear resistance, thermal shock resistance, low conductivity, and this has approximately 3-4 times greater fracture toughness comparing to Alumina.Since Zirconia has excellent fracture toughness and luster, it can be applied to knives, bearing, ornaments, etc. And it is expensive comparing to alumina due to its longer processing time.
- Mechanical components
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These products are applied to the areas that need to minimize the wear and thermal deformation due to the repetitive work.
Semiconductor fixtures, Bush, Shaft, Nozzle, Rod, Piston, Gate valve, Pipe, Mechanical seal ring etc.
- Liner
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These products are applied to the automatic lines or sliding surfaces in the steel mills, cement plants and thermal power plants, etc.
Elbow, Hopper, Ball mill, Ball media, Pipe, Conveyor etc.
- Guide
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As a non-magnetic material, sludge or foreign substances do not stick on these products.
Guide, Roller, Capstan, Plating liner etc.
- Electrical insulation
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Because of excellent insulation, heat resistance and durability, these are used for electrical and electronic components.
High voltage insulator, Socket, Spark plug, Terminal block etc.
- Seal for the water supply
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These products are applied to the areas where the lubricant cannot be injected and repeatedly closing & opening operation.
Disc for tap
- ZrO2 components
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Zirconia has excellent fracture toughness, mechanical strength and excellent luster characteristics.
Knife, Cutter, jewelry, Watch case, Nozzle etc.
| Properties | Grade | Al2O3 | ZrO2 | ||
|---|---|---|---|---|---|
| DYAL 850 | DYAL 960 | DYAL 995 | DYZ 940 | ||
| Chemical Composition | Al2O3 | 85% | 96% | 99.5% | 94.4% |
| SiO2 | 10% | 3 | 0.4 | (Y2O3) 5.3 | |
| Specific Gravity | 3.4 | 3.7 | 3.9 | 6.07 | |
| Color | White | White | Ivory | White | |
| Vickers Hardness GPa HV9.807N |
11 | 13 | 17 | 12 | |
| Fracture toughness MN/m-3/2 |
- | 2 | 3 | 7 | |
| Flexural strength(25℃) MPa |
260 | 310 | 380 | 1,100 | |
| Thermal expansion coeff. × 10-6/℃ |
7.2 | 7.5 | 8.0 | 9.5 | |
| Thermal shock ΔT, ℃ |
150 | 200 | 250 | 290 | |
| Thermal conductivity W/mK |
12 | 23 | 30 | 3 | |
| Working temperature ℃ |
1,350 | 1,500 | 1,600 | 800 | |
| Young's modulus GPa |
300 | 320 | 370 | 200 | |
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