Apiezon N vacuum grease (EMS)

Apiezon N cyrogenic vacuum grease is a specialty grease for various cryogenic uses, including for vacuum sealing at very low to warm temperatures where its vapour pressure is very low, making it suitable for high vacuum applications. Type N does not craze or crack at low temperatures, has good thermal conductivity at low temperatures and is ideal for mounting sensors and other devices. It has very low levels of magnetic susceptibility which makes it suitable for some superconductor applications. Cycling between absolute zero and +40?C is well tolerated by Apiezon; N. It is frequently used as a jointing medium on cryostat flanges where its larger contact area, compared with that of indium wire, provides much better thermal transfer. Applications include cryo-systems on electron microscopes, cryostats, magnetic image resonance systems, sealing of vacuum parts including glass joints and as a heat sink.

Features:

• Very high vacuum range
• Ambient temperatures
• Cryogenic uses
• Radiation resistant
• Added cushioning
• Excellent lubricants
• Silicone & halogen free
• Easily removed

Comparison Data for Apiezon Greases

Properties:

• Dropping point - ASTM.D 566: 42 to 52?C
• Typical working temperature range: -269 to 30?C
• Vapour pressure @ 20?C: 6x10^-10Torr
• Relative density @ 20?C: 0.911
• Resistant to radiation: Not recommended
• Outgassing characteristics - ASTM .E 595: <1% TML, <0.1% CVCM
• Lubricity 4 Ball Test - ASTM.D 2596: 150kg
• Coefficient of expansion per ?C over 20?C - 30?C: 0.00072
• Thermal conductivity @ 20?C: 0.194W/m?C
• Volume resistivity: 2.0x10¹⁶? cm
• Permittivity: 2.3
• Loss tangent: <0.0001
• Surface breakdown at flash over: 27kV
• Electrical strength: 820V/mil

Apiezon N Technical Data

NOTE: Formerly called M015