Precision Sapphire Discharge Needle with Tapered Tip Sapphire Crystal Rod

A ​​sapphire discharge needle​​ is a precision discharge component manufactured from single-crystal sapphire (Al₂O₃). Its core characteristics stem from the physical and chemical properties of sapphire:

​​1. Crystal Structure​​

• Trigonal crystal system with tightly arranged atoms, providing ultra-high hardness (Mohs 9) and compressive strength (2.1 GPa).

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2. Thermal Properties​​

• Melting point of 2050°C and thermal conductivity of 23–26 W/(m·K) (parallel to the c-axis), enabling stable operation across a wide temperature range (-40°C to 300°C).

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3. Electrical Properties​​

• Dielectric constant of 9.4–11.58 and insulation strength ≥10 kV/mm, supporting high-voltage discharge (typical range: 8–12.5 kVpp).

Sapphire Discharge Needles Key Features and Advantages​

1. Precision Machining Capability​​

• ​​Tip Precision​​: Guided mode growth technology ensures tip curvature radius ≤5 μm and discharge point diameter ≤10 μm, sapphire discharge needles ideal for nano-scale electrostatic elimination.
• ​​Surface Treatment​​: Sapphire discharge needles's ultra-precision grinding achieves surface roughness Ra ≤5 Å, minimizing arc diffusion during discharge.

2. ​​Longevity and Reliability​​

• ​​Abrasion Resistance​​: Sapphire’s hardness is 3× that of tungsten steel, sapphire discharge needles enabling 10⁶ discharge cycles (vs. 10⁴ for conventional tungsten needles).
• ​​Chemical Inertness​​: Sapphire discharge needles resists dust adhesion, extending cleaning intervals to 30 days (vs. 7 days for standard materials).

​​3. Multi-Scenario Adaptability​​

• ​​Voltage Range​​: Sapphire discharge needles supports pulse DC (DC) and AC modes with ±0.1 kV voltage regulation precision.
• ​​Environmental Tolerance​​: Sapphire discharge needles operates stably in humidity 10–95% (non-condensing) and altitudes up to 5000 m.

​​4. Smart Integration​​

• ​​Real-Time Monitoring​​: Integrated temperature sensors (±0.5°C accuracy) and current feedback systems enable automatic shutdown during anomalies.
• ​​Remote Control​​: Adjustable parameters (frequency, voltage, duty cycle) via RS485 interface.