Apiezon L ultra high vacuum grease (previously M010/M011)
Apiezon L ultra high vacuum grease (previously M010/M011)
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Silicon-free. A well-proven and recommended high-vacuum grease for electron beam instruments. Grease L is a petroleum hydrocarbon grease, containing no additives. Very low vapour pressure (@20C of 8x10-?? torr), high vacuum grade. Type L is widely used in electron microscopy where moderately high column temperatures and high vacuum requirements demand a vacuum grease with extraordinary characteristics. Type L is also used in the stationary phase of gas liquid chromatography, and may be used on all ground joints in a vacuum system (not for stopcocks). Its solubility is as follows: in ethanol at 20C-0.003%; 60C-0.005%; 100C-0.011%; 150C-0.011%. Grease L softens and melts at about 47C and it is not recommended for joints where temperatures exceed more than 30C in use. Grease T is recommended for these higher temperatures.
Apiezon products:
Typical Property | AP101 | AP100 | H | L | M | N | T | |
---|---|---|---|---|---|---|---|---|
Main area of application |
General | Lubricating | Cryogenic | High Temp | High Vacuum | General Vacuum | Medium Temp | |
Melting Point: ASTM.D 566 |
°C °F |
>200 >392 |
42-52 108-126 |
does not melt | 42-52 108-126 |
40-60 104-140 |
42-52 108-126 |
112-137 233-278 |
Working temp. range | °C °F |
-40-180 -40-365 |
10-30 50-86 |
-10-240 14-464 |
10-30 50-86 |
10-30 50-86 |
-269-30 -452-86 |
10-120 50-248 |
Vapor Pressure Torr @20°C |
<1.0x10-5 | 7.0x10-11 | 1.7x10-9 | 7x10-11 | 1.7x10-9 | 6x10-10 | 4.6x10-9 | |
Relative Density 20°C | 0.981 | 1.042 | 0.918 | 0.896 | 0.894 | 0.911 | 0.912 | |
Radiation Resistance | No | No | No | Yes | Yes | No | No | |
Outgassing Characteristics ASTMS .E 595-90 |
TML CVCM |
- - |
<1.0% <0.1% |
<1.0% <0.1% |
<1.0% <0.1% |
- - |
<1.0% <0.1% |
- - |
Lubricity 4 Ball Test ASTM .D 2763 (IP 239), Kg |
450 | 450 | 250 | 150 | 140 | 150 | - | |
Viscosity of molten grease, cP |
50°C 100°C |
- - |
- - |
- - |
766 62.3 |
413 29.8 |
- - |
- - |
Coefficient of expansion per °C over 20°C-30°C |
0.00066 | - | - | 0.00076 | 0.00075 | 0.00072 | 0.00073 | |
Thermal conductivity, w/m°C |
- - |
- - |
- - |
0.216 - |
0.194 - |
0.194 0.095 |
- - |
|
Latent heat of fusion, cal/g |
- | - | - | 15.1 | 18.7 | 15.0 | - | |
Fusion Peak °C | - | - | 25 | 32 | 34 | 31 | * | |
Vol. resistivity, cm | - | - | - | 1.2x1016 | 2.6x1016 | 2.0x1016 | 3.3x1012 | |
Permittivity | - | - | - | 2.3 | 2.1 | 2.3 | 2.3 | |
Loss tangent | - | - | - | <0.0001 | <0.0001 | <0.0001 | <0.0001 | |
Surface breakdown at flash over, kV |
- | - | - | 24 | 28 | 27 | 24 | |
Electric strength, V | - | - | - | 730 | 850 | 820 | 730 |