复合氧化物陶瓷材料在较低温度下的催化性能

Catalytic Action of Composite Oxide Ceramic Material at Low Temperature

含有稀土的陶瓷材料钙钛矿型复合氧化物,在一定条件下,对特定的化学反应,具有催化活性。含烯土镧的四元复合氧化物 R_xB_(1-x)M)yT_(1-y)O_3,在80～90℃的较低温度和1大气压下,对 NO_x 和 CO 的氧化还原有催化作用。在微反应器中,通入模拟的大功率 CO_2激光器的工作气体,测定不同温度和不同空速下的氮氧化物转化率,结果表明这类氧化物可以作为实现 CO_2激光器工作气体在器腔内循环转化的催化剂,从而为延长激光器的连续工作时间创造了条件。

Composite oxide ceramic material in perofskite structure which contains rare earth has catalytic activity for certain chemical reactions under proper conditions. This paper presents the catalytic actions of a tetrabasic composite oxide R_xB_(1-x)M_y T_(1-y)O_3 which contains the rare earth Lan- thanum involved in the oxidation and reduction of NO_x and CO at lower tempe- rature from 80℃ to 90℃ and at one atmos- phere.By injecting simulated High- power CO_2 Laser operating gas into the microreactor and measuring conversion rates of nitric oxide at different tempera- tures and space rates,it is verified that such oxide can be used as a catalyst to achieve the circulating conversion of CO_2 Laser operating gas in the cavity.As a result, prolonging continuous operation time be- comes possible.