SYSTEMATIC ERRORS IN METAL STRIP DIFFRACTION FURNACES

摘要

Requirements for accurate lattice thermal expansion measurements using Bragg-Brentanorndiffraction geometry are briefly described and results are shown for SRM676 aluminum oxide atrntemperatures up to 1000oC. These data demonstrate that careful consideration of systematicrnsample displacement and temperature is necessary to obtain reliable results. A comparison ofrnresults with and without calibrations to remove the systematic errors shows that ignoring thernerrors produces unreliable and unreasonable results.