Application of Nanostructure Prepared by Sol-Gel Process to CO_2 Absorbent, Membrane and Photomultiplier

The preparations of lithium zirconate (li_2 zro_3) powders were attempted by a sol-gel process. Thismaterial reacted immediately with co_2 in the range from an ambient temperature to 873k . Moreover，the products react and revert reversibly to li_2 zro_3 at temperature above 973k . the absorption andemission of co_2 gas were ascribed to the mechanism whereby lithium oxide in the li_2 zro_3 reactreversibly with co_2 . The degree of absorption was defined as The value obtained by dividing Thefractional mass gain of li_2 zro_3 after absorption by the fractional mass gain corresponding to 100%reaction. The degree of li_2 zro_3 powder having a specific surface area of9.81m g^<-1> attained to 95.2% under the absorption condition at 773k for 7.2ks. Furthermore thecontrols of micropore size for anodic oxide film prepared by Kalcolar solution were attempted by avacuum heating and a sol-gel process and. The permeation characteristics of co_2 - n_2 mixtured gasthrough the membrane was . the ability of co_2 gas separation using this membrane wasconfirmed。

The preparations of lithium zirconate (Li_2ZrO_3) powders were attempted by a sol-gel process. This material reacted immediately with CO_2 in the range from an ambient temperature to 873K. Moreover, the products react and revert reversibly to Li_2ZrO_3 at temperature above 973K. The absorption and emission of CO_2 gas were ascribed to the mechanism whereby lithium oxide in the Li_2ZrO_3 react reversibly with CO_2. The degree of absorption was defined as the value obtained by dividing the fractional mass gain of Li_2ZrO_3 after absorption by the fractional mass gain corresponding to 100% reaction. The degree of absorption of Li_2ZrO_3 powder having a specific surface area of 9.81m・g^<-1> attained to 95.2% under the absorption condition at 773K for 7.2ks. Furthermore the controls of micropore size for anodic oxide film prepared by Kalcolar solution were attempted by a vacuum heating and a sol-gel process and. The permeation characteristics of CO_2-N_2 mixtured gas through the membrane were evaluated. The ability of CO_2 gas separation using this membrane was confirmed.