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Druschke GmbH

Silicone oil 705

Artikelnummer: H02400027 H02400071
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Silicone oil 705

overview
Silicone 705 is a pentaphenyltrimethyltrisiloxane based oil for generating UHV in the range 10-9 to 10-11 mbar, characterized by extremely low vapor pressure and backflow rates.
This oil exhibits extreme chemical, heat, oxidation, hydrolysis and radiation resistance.


applications
Silicone 705 is intended for use in applications where ultra-high and ultra-clean vacuum conditions are required. The UHV characteristics are particularly useful in thin films, surface engineering, thermonuclear and plasma physics applications, and electron microscopy. Thanks to its extreme stability and high temperature during spontaneous ignition, it is ideally suited for use in space simulation chambers. Its low vapor pressure and low backflow rate eliminates the need for refrigeration and freezing traps for pressures in the 10-8 mbar range. With a liquid nitrogen trap, however, ultimate pressures of 10-11 mbar can be achieved.

Technical specifications

Typical maximum ultimate vacuum at 20 °C (mbar) 8.0x10-11
Vapor pressure at 25 °C (Pa). 2 x 10-11
Boiling point at 1.3 mbar (°C) (approximate) 245
Viscosity, cSt at 25°C 165 - 185
pour point °C -14
Flash point °C >243
Specific gravity at 25 °C 1.09 – 1.10