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).
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).
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.
Sapphire Discharge Needles Core Applications and Technical Details
1. Semiconductor Manufacturing
- Wafer Electrostatic Elimination: Sapphire discharge needles
installed on lithography machine wafer stages to neutralize ±5 kV
static on silicon surfaces, improving yield by 3%.
- Equipment Protection: Sapphire discharge needles used in ion
implanters to withstand 10¹⁵ ions/cm² high-energy particle
bombardment.
2. Electronics Assembly and Packaging
- PCB Electrostatic Neutralization: Sapphire discharge needles
neutralizes residual charge (≤50 V) on circuit boards in SMT lines,
preventing component breakdown.
- Packaging Anti-Sticking: Eliminates static (surface resistance
10¹²–10¹³ Ω) on plastic films to prevent dust adhesion.
3. Medical Devices
- Surgical Instruments: Sapphire scalpels (tip curvature radius
20 μm) enable precise tissue cutting with minimal thermal damage
(e.g., ophthalmic microsurgery).
- Endoscope Components: Withstand 134°C/30 min autoclave cycles
for electrostatic shielding in gastrointestinal examinations.
4. New Energy and Automotive
- Battery Production: Eliminates static (charge density ≤1 μC/m²)
on lithium battery electrodes to prevent short circuits.
- Charging Infrastructure: Deploys in high-voltage charging
interfaces to avoid arcing (discharge current ≤10 mA).
5. Research and Defense
- Laser Systems: Sapphire discharge needles acts as window
material for high-power lasers, enduring 10⁶ W/cm² optical thermal
loads.
- Missile Radomes: Sapphire rods in guidance system optics
withstand impacts ≥50 GPa.
Related product recommendations
2. Sapphire Light Cone Sapphire Rods Monocrystal Al₂O₃ Optical
Glass Cone For Optical Sensors
Sapphire Discharge Needles Q&A
1. Q: What is a sapphire discharge needle?
A: A sapphire discharge needle is a precision electrostatic
elimination component made from single-crystal sapphire (Al₂O₃),
used to neutralize static electricity in industrial and electronic
applications.
2. Q: How to maintain a sapphire discharge needle?
A: Regularly clean the needle tip with alcohol to remove
contaminants and inspect for wear, replacing it if discharge
efficiency declines.
Tags: #Precision Sapphire Discharge Needle, #Sapphire Light cone,
#Al₂O₃ 99.999%, #Transmittance≥80%, #Precision Cutting, #Optical
Grade, #Ra≤0.5nm, #Sapphire Discharge Needles, #Sapphire Tapered Tip, #Sapphire Crystal Rod
