  We present a ceramic material based on hematite (Fe$_2$O$_3$) and zirconia
stabilized with yttria at 8% molar (YSZ), that exhibits stable electrical
properties with transported charge and that can be tuned to the resistivities
necessary to induce spark-quenching in gaseous detectors ($\rho = 10^9-10^{12}$
$\Omega \cdot$cm), from room temperature down to the liquid-vapor coexistence
point of nitrogen (77 K). It, thus, allows covering the operating temperatures
of most immediate interest to gaseous instrumentation. The ceramics have been
produced in a region of mass concentrations far from what has been usually
explored in literature: optimal characteristics are achieved for Fe$_2$O$_3$
concentrations of 75%wt (LAr boiling temperature), 35%wt (LXe boiling
temperature), and 100%wt (room temperature). The nine order of magnitude
enhancement observed for the electrical conductivity of the mixed phases
relative to that of pure Fe$_2$O$_3$ is startling, however it can be
qualitatively understood based on existing literature. Plates of 4 cm x 4 cm
have been manufactured and, prior to this work, operated in-detector at the LXe
boiling point (165 K), demonstrating spark-free operation. Preliminary results
obtained for the first time on a spark-protected amplification structure
(RP-WELL) at around the LAr boiling point (90 K) are now presented, too.
