AE Coins Material Composition Study
Electrical Conductivity, Density,
and X-Ray-Fluoresence (XRF)-Analysis
| The
experiments were performed in an effort to collect data for the
assessment of core material composition of antique bronze coins from
the nondestructive surface (patina) XFR-Analysis. To this purpose
measurements were carried out both before and after removal of the
patina. |
|
| 1. |
Density
ρ [g(/cm^3]
was measured after Archimedes in water. Scales accuracy
was 0.01 g. |
| 2. |
Electrical
conductivity σ [MS/m] was measured with a Forester SIGMATEST
instrument, with an 8 mm probe, and selectable frequencies of 60, 120,
240, 480, and 960 Hz. Electrical conductivity was measured on both sides of the coin in 4 to 10 positions (depending on the size) and minimum and maximum values were recorded. |
| 3. |
XRF-Analysis
was done in an OXFORD ED 2000 facility with a Ag X-ray tube. K-lines
were used for Ag, Cu, Sn, Zn, As, S, Cl, P, Na, Ca, Fe, and Sb; Kα for
Si; L-lines for Au, and Pb. |
Evaluation of Experimental Data
Coin Data
|
|
