A. Rahten et al., THE PREPARATION OF YTTRIUM-OXIDE FROM A Y(N2H3COO)(3)CENTER-DOT-3H(2)O PRECURSOR IN VARIOUS ATMOSPHERES, Thermochimica acta, 258, 1995, pp. 135-144
The thermal decomposition of yttrium hydrazidocarbonate trihydrate Y(N
2H3COO)(3) . 3H(2)O has been studied in the temperature range 25-1400
degrees C. The influence of inert and oxidative atmospheres, e.g. argo
n, carbon dioxide and air, on the course of the thermal decomposition
was determined. After dehydration to the anhydrous compound, the decom
position proceeds through several decomposition steps to yttrium oxide
. In air, a pure high temperature C form of this oxide is isolated at
a relatively low temperature, e.g. 708 degrees C. The same end product
is obtained in carbon dioxide, albeit at higher temperatures, but in
argon the yttrium oxide is mixed with amorphous carbon. The surface ar
ea and other particulate properties are substantially dependent on the
heating programme of the sample.