Volume Resistivity of Advanced Ceramics
Volume resistivity is a fundamental electrical property that defines how strongly a material opposes the flow of electric current. It is particularly critical in applications where electrical insulation, high thermal resistance, and stability in extreme environments are required—areas where advanced ceramics excel.
Ceramic materials like alumina (Al₂O₃), zirconia (ZrO₂), and silicon nitride (Si₃N₄) are widely used in electronics, aerospace, medical devices, and power systems precisely because of their outstanding insulation properties.
Перейти к
What Is Volume Resistivity?
Volume resistivity (ρv), measured in ohm-centimeters (Ω·cm), quantifies the electrical resistance of a material across a unit cube. It differs from surface resistivity, which measures resistance along a material’s surface.
The higher the volume resistivity, the better the material functions as an insulator. For ceramics, this property is crucial in preventing electrical leakage, component failure, and signal distortion.
Why Is High Volume Resistivity Important?
Volume Resistivity Data of Key Advanced Ceramics
| Керамический материал | Объемное удельное сопротивление (Ω-см) | Remarks |
|---|---|---|
| Глинозем (Al₂O₃) | ~10¹⁴ – 10¹⁶ | Stable and cost-effective insulator |
| Цирконий (ZrO₂) | ~10¹⁰ – 10¹² | Lower than alumina, high strength |
| ZTA20 | ~10¹¹ – 10¹³ | Toughened alumina, good compromise |
| Нитрид кремния (Si₃N₄) | ~10¹² – 10¹⁴ | Strong mechanical + good insulation |
| Нитрид алюминия (AlN) | ~10¹³ – 10¹⁵ | Excellent for heat + electrical use |
| Карбид кремния (SiC) | ~10³ – 10⁶ | Semiconductor, limited insulation |
| Оксид бериллия (BeO) | ~10¹³ – 10¹⁴ | High thermal + good insulation |
| Нитрид бора (BN) | ~10¹² – 10¹⁵ | Stable at high temperature |
| MGC (обрабатываемая стеклокерамика) | ~10¹³ – 10¹⁴ | Machinable and insulating |
*Данные приведены только для справки.
Нужна помощь в выборе подходящей керамики?
Selecting the right ceramic material is critical to ensuring long-term reliability and optimal performance. Whether you require boron nitride, aluminum nitride or alumina ceramic materials, our materials offer industry-leading performance, durability and precision.
Наша техническая команда готова помочь - свяжитесь с нами сегодня, чтобы получить квалифицированную консультацию, основанную на ваших конкретных потребностях.
Visualization: Volume Resistivity Comparison
*Данные приведены только для справки.
