Low density and low thermal conductivity chrome oxide refractories for glass-melting furnaces for fiber production

Effect of yttria addition on the stability of porous chromium oxide ceramics in supercritical water

“…It was reported that the thermal conductivity of as-pressed chromium oxide powder with an apparent density of 2.35 g/cm 3 is only 0.45 W/m K at 20°C [7]. The thermal conductivity of a chromium oxide block with an open porosity of 12-18% is around 3.1 W/m K at 1200°C which is comparable with a zirconium oxide block with an open porosity of 8% [6].…”

“…It can also be used as a refractory and insulator material by virtue of its high melting temperature and low thermal conductivity [6]. It was reported that the thermal conductivity of as-pressed chromium oxide powder with an apparent density of 2.35 g/cm 3 is only 0.45 W/m K at 20°C [7].…”