Abstract
A comparative quartz dilatometer is described which uses a differential transformer and a lock-in amplifier. The instrument can be operated at temperature from -196°C (liq. N2) to ca. 350°C with a sensitivity of Δl_??_5×10-5mm. Thermal expansion measurements are presented for Ni metal and some antiferroelectric ceramics such as PbZrO3, Pb(MgW)1/2O3, and Pb(Fe2/3U1/3)O3.
