【摘要】 采用柠檬酸络合法,在较低温度下（750℃左右）,通过控制柠檬酸加入量。获得比表面大,活性好的钙钛矿型（ABO₃）复合稀土氧化物LaFeO₃材料。掺In₂O₃,Y₂O₃等杂质,可以进一步改善材料的乙醇气敏特性。用这种材料制备的乙醇气敏元件。其灵敏度β值为39（气体浓度为<1000ppm）,抗汽油,一氧化碳、煤气、丁烷、氢气等干扰气体的能力强,性能稳定可靠。更多还原

【Abstract】 The materials of perovskite-like （ABO₃） rare-earth composite oxids LaFcO₃ are prepared by citric acid complex method in lower temperature （about 750℃）. The LaFcO₃ material of bigger specific surface and good activity can conveniently be obtained through controlling quantity citric acid. The characteristics of the LaFcO₃ materials are improvde by doping In₂O₃ and Y₂O₃. The sensitivity of the alcohol gas sensor made from this materials is 39 （1000 ppm, gas concentration）, its ability of anti-disturbance gas such as gasoline, carbon monoxide, coal gas, butane, hydrogen is powerful. The properties of clement are stable and reliable.更多还原