Features
• High strength
• High reflectivity
• High thermal shock resistance
• Excellent processing performance
Application
• Medium power supply module
• Medium power LED
• Instruments
Material Properties Table
| Project | Test conditions | Unit | Al 2 O 3 /ZrO 2 | |
| ZTA | ||||
| Material | - | - | Al 2 O 3 /ZrO 2 | |
| Appearance | - | - | White dense | |
| Surface roughness | Ra | μm | 0.2~0.5 | |
| Density | - | g/cm 3 | ≥3.85 | |
| Physical properties | Bending strength | 3 -point bending resistance | MPa | ≥550 |
| Vickers hardness | Load 4.9 | GPa | ≥14 | |
| Water absorption | - | % | 0 | |
| Thermal performance | Thermal conductivity | 25℃ | W/(m·k) | ≥23 |
| Linear thermal expansion coefficient | 25-500℃ | 1x10 -6 mm/℃ | 6.6~7.5 | |
| Thermal shock resistance | 800℃ | Time | ≥10 | |
| Specific heat | - | J/(kg·K) | 720 | |
| Electrical properties | Dielectric constant | 1MHz/25℃ | - | 10~11 |
| Dielectric loss | 1MHz/25℃ | x10 -4 | ≤3 | |
| Volume resistivity | 25℃ | Ω·cm | > 10 14 | |
| Breakdown voltage | - | KV/mm | > 15 | |
| Light performance | Reflectivity | Reflectivity meter | - | ≥95% |
| Whiteness | Whiteness meter | - | - | |
Specifications and Dimensions
| Material | Unit | Al 2 O 3 | ZTA | AlN | Si 3 N 4 |
| Effective dimensions ( A , B ) | mm | 50.8-190 | 50.8-190 | 50.8-190 | 138*190 |
| Thickness ( T ) | mm | 0.25-1.5 | 0.25-1.5 | 0.25-1.0 | 0.25 , 0.32 |
| Thickness tolerance | mm | ±5% ( Min±0.03mm ) | ±5% ( Min±0.03mm ) | ±5% ( Min±0.03mm ) | ±5% ( Min ±0.03mm ) |
| Warpage ( C ) | mm | ≤0.3% | ≤0.3% | ≤0.3% | ≤0.3% |
| surface roughness | μm | 0.2-0.6 | 0.2-0.5 | 0.2-0.75 | 0.2-0.75 |
| Size, thickness and surface roughness can be customized | |||||
Processing
• Laser processing
• Grinding and polishing sheet roughness table
| Project | Qualified | Special Grade | ||
| Internal dimension tolerance | ±0.05mm | ±0.03mm | ||
| External dimension tolerance | ±0.15mm | ±0.1mm | ||
| Hole tolerance (φ0.07-0.15mm) | ±0.05mm | ±0.02mm | ||
| Hole tolerance (φ ＞ 0.15mm) | ±0.1mm | ±0.02mm | ||
| Project | Surface roughness (μm ) | |||
| Qualified | Special Grade | |||
| Grinding | 0.3-0.6 | 0.3-0.5 | ||
| Fine grinding | 0.1-0.4 | 0.1-0.3 | ||
| Polishing | ≤0.1 | ≤0.05 | ||
Declaration: This is an original article of INNOVACERA®. Please indicate the source link when reprinting: https://www.innovacera.com/product/zirconia-zta-substrates
Frequently Asked Questions
Why Choose ZTA Substrates Over Standard Alumina? How Does High Toughness Prevent Thermal Shock Cracking?
Standard alumina substrates tend to chip or develop micro-fractures under aggressive screw-down mounting and repeated power cycling. INNOVACERA’s Zirconia Toughened Alumina (ZTA) substrates incorporate stress-induced phase-transformation toughening from zirconia, increasing bending strength to >= 550 MPa while providing thermal conductivity >= 23 W/m·K. Combined with >= 95% optical reflectivity and outstanding 800°C thermal shock resistance, ZTA substrates eliminate breakage risks and enhance lumen efficiency in medium-power LED modules and power supplies.
Need Precision Laser-Diced or Polished Ceramic Sheets? Where Can You Buy Custom ZTA Substrates?
You can buy tailored ZTA ceramic substrates directly from INNOVACERA in standard plate sizes up to 190 mm and thicknesses from 0.25 mm to 1.5 mm. We offer full in-house secondary processing—including laser cutting, precision hole drilling (down to 0.07 mm with ±0.02 mm tolerances), and surface polishing down to Ra <= 0.05 µm—ensuring plug-and-play assembly into medium-power electronic modules and optical instruments.
