NETZSCH LFA 447 Nanoflash, Руководство по эксплуатации

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Operating the Instrument
LFA 447
TM
01/09 J:\LFA447\CHAPTER4.doc
7
to coat the samples:
1. Clean all samples with a suitable solvent (including the reference sample if it has been
graphite coated previously) and lay them side by side (maintaining sample
identification).
2. Shake the can and hold it approximately 10-12 inches from the samples.
3. Fully depress the valve aiming to one side of the row of samples for a short time (< 1s) to
initiate the spray. Slowly sweep across the row of samples several times while
maintaining a constant distance, applying one thin coat.
4. Wait approximately 2 minutes for the coat to be dry.
5. Repeat steps 2-4 three more times.
6. Turn the samples over, taking care that the coating on the sample faces will not be
damaged.
7. Repeat steps 2-4 two or three times.
Sample Dimensions
•
Thickness
•
Diameter/Length
Sample Mass
The sample mass is used for the calculation of the density which is necessary for the
determination of the thermal conductivity.
Sample Density
The bulk density of the sample (in g/cm
3
) must be measured for the following tests:
•
specific heat
•
thermal conductivity