SOME PECULIARITIES OF OXIDATIVE DEHYDROGENATION OF TIH2 AS A COMPONENT OF BIORADIOPROTECTIVE COMPOSITES

An analytical expression of the relationship between activation energy , temperature change rate and peak temperature of thermal plots has be en obtained. By complex thermal analysis and X-ray emission spectrosco py it was found that titanium dihydride, obtained with self-developed high temperature synthesis (SDHTS), was chemico-physically defected (h eterogeneous product) having free metal, which during heating led to a n exothermic reaction of oxidative cross-hydrogenation A possibility o f synthesis of TiHx with x > 2 has been demonstrated. A structure and composition of the condensed phase TiHx (x > 2) with maximal atomic ra tio H:Ti was proposed. TiO2 as a final product of oxidative dehydrogen ation has been found to destabilize the TiH2. Stabilizing dopants incr eased the peak temperatures of thermal plots in the 10-50 K temperatur e range and gave thermostable TiH2. The stabilized TiH2 is promising a s a component (base) of effective bioprotective composites.