3Y-TZP
High-strength zirconia | Approximately 3 mol% | Predominantly tetragonal zirconia; transformation toughening provides high fracture toughness and strength. | Typically the highest strength among common 3Y–5Y dental and engineering grades; exact values depend on density, grain size, and processing. | Cutting tools, wear parts, industrial rollers, dental frameworks, brackets, and structural ceramic components. | Specify density, grain size, flexural strength, fracture toughness, shrinkage, and sintering schedule. | Technical data sheet, certificate of analysis, particle-size report, XRD phase data, and lot traceability. |
3Y-E
Enhanced 3Y zirconia | Approximately 3 mol% | Fine-grained tetragonal structure optimized for strength, reliability, and resistance to low-temperature degradation. | High strength with balanced toughness; suitable where mechanical reliability is more important than maximum translucency. | Medical components, dental posterior restorations, pump parts, valve seats, and precision wear components. | Confirm aging resistance, hydrothermal-aging test method, translucency target, and dimensional shrinkage. | ISO 13356 or applicable standard data, aging results, chemical analysis, and quality-control plan. |
4Y-PSZ
Balanced zirconia | Approximately 4 mol% | Mixed tetragonal and cubic phase; offers a compromise between strength and optical translucency. | Generally lower strength than conventional 3Y-TZP but more translucent and aesthetically versatile. | Anterior and posterior dental crowns, bridges with design limits, veneers, and esthetic prosthetic components. | Request flexural strength by test standard, translucency parameter, shade system, and sintering compatibility. | Color data, translucency data, lot certificate, biocompatibility statement, and processing instructions. |
5Y-PSZ
High-translucency zirconia | Approximately 5 mol% | Higher cubic-phase content improves translucency but reduces transformation-toughening capacity. | Usually lower strength and fracture toughness than 3Y and 4Y grades; selected primarily for optical performance. | Anterior crowns, thin esthetic restorations, veneers, and applications requiring improved light transmission. | Verify minimum flexural strength, indication limits, thickness range, shade reproducibility, and surface-finishing method. | Optical-property data, strength test results, shade chart, safety data sheet, and recommended firing cycle. |
3Y–5Y Multilayer
Gradient zirconia | Approx. 3–5 mol%
Layer dependent | Different yttria concentrations are layered or graded to combine a stronger core with a more translucent outer zone. | Performance varies across the disc or block; strength and translucency must be evaluated by layer and thickness. | Monolithic dental restorations, full-contour crowns, bridges within approved spans, and esthetic laboratory work. | Ask for layer thickness, transition-zone design, milling orientation, sintering shrinkage, and minimum connector dimensions. | Layer map, batch certificate, milling parameters, sintering program, and application limitations. |
3Y-ZrO₂ Powder
Pressing or milling feedstock | Approximately 3 mol% | Powder for compacting, injection molding, dry pressing, or other ceramic forming processes. | Final strength depends strongly on powder purity, granulation, green density, sintering profile, and porosity control. | Technical ceramics, wear-resistant parts, custom molded components, and laboratory-developed formulations. | Specify BET surface area, particle-size distribution, moisture, flowability, granule strength, and binder system. | COA, SDS, particle-size analysis, impurity profile, moisture data, and recommended forming conditions. |
Stabilized Zirconia Beads
Grinding media | Commonly 3Y or 5Y | Dense zirconia media provide high wear resistance and low contamination during fine grinding. | 3Y media generally prioritize toughness and wear resistance; other formulations may target specific milling conditions. | Paints, coatings, inks, pigments, battery materials, ceramics, pharmaceuticals, and mineral processing. | Specify bead diameter, true density, bulk density, wear rate, roundness, and compatibility with the mill. | Dimensional report, density test, wear data, chemical composition, and contamination statement. |
Partially Stabilized Zirconia
PSZ engineering ceramic | Often 3–5 mol%
Formulation dependent | Partially stabilized phase composition can deliver useful toughness, thermal-shock resistance, and wear performance. | Properties vary substantially with stabilizer type, microstructure, and heat treatment; do not compare by yttria content alone. | Thermal barriers, furnace components, mechanical seals, wear liners, and high-temperature fixtures. | Define stabilizer chemistry, maximum service temperature, thermal-shock cycle, porosity, and machining allowance. | Material certificate, thermal-property data, phase analysis, service-temperature guidance, and machining recommendations. |
Y-TZP Precision Parts
Finished engineering components | Commonly 2–3 mol% | Fine-grained tetragonal zirconia designed for dimensional stability, wear resistance, and high mechanical performance. | High strength is achievable when the component is fully densified and free from critical surface defects. | Seal rings, guides, nozzles, cutters, medical instruments, sensor parts, and precision positioning components. | Specify tolerances, surface roughness, edge condition, inspection method, flatness, and allowable defect size. | Dimensional inspection report, surface-finish report, batch traceability, drawing review, and inspection standard. |
Alumina-Toughened Zirconia
ATZ composite | Zirconia matrix; Y₂O₃ varies | Alumina additions can improve hardness, wear resistance, and elastic modulus; performance depends on composition and microstructure. | Often selected for a balance of hardness, stiffness, wear resistance, and zirconia-based toughness. | Wear plates, cutting components, pump parts, medical tools, bearings, and demanding industrial fixtures. | Request alumina fraction, density, hardness, fracture toughness, modulus, and thermal-expansion data. | Composition certificate, microstructure image, mechanical-property report, thermal data, and quality plan. |
