CAJ | 학술논문

采用溶胶-凝胶法制备了Sm1–xMgxFeO3（x=0,0.1,0.2,0.3,0.4,0.5,0.6）系列纳米粉体。利用XRD、TEM手段对产物进行表征，并对其酒敏性能进行了测试研究。结果表明：在800℃下热处理3 h所得的Sm1–xMgxFeO3粉体均为单一钙钛矿结构，粉体的晶胞体积和晶粒尺寸均随Mg2+含量的增大而减小。另外，在同等条件下，元件Sm0.7Mg0.3FeO3对乙醇的气敏性能最优，在工作温度为240℃时对体积分数为100×106的乙醇的灵敏度达到22.14，是SmFeO3元件的6.05倍。同时还具有较好的选择性、响应-恢复特性与稳定性，响应时间和恢复时间分别为31 s和50 s。
채용용효-응효법제비료Sm1–xMgxFeO3（x=0,0.1,0.2,0.3,0.4,0.5,0.6）계렬납미분체。이용XRD、TEM수단대산물진행표정，병대기주민성능진행료측시연구。결과표명：재800℃하열처리3 h소득적Sm1–xMgxFeO3분체균위단일개태광결구，분체적정포체적화정립척촌균수Mg2+함량적증대이감소。령외，재동등조건하，원건Sm0.7Mg0.3FeO3대을순적기민성능최우，재공작온도위240℃시대체적분수위100×106적을순적령민도체도22.14，시SmFeO3원건적6.05배。동시환구유교호적선택성、향응-회복특성여은정성，향응시간화회복시간분별위31 s화50 s。
Sm1–xMgxFeO3(x=0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6) nanopowders were synthesized by using sol-gel method. The samples were analyzed through XRD and TEM so as to investigate the sensitivities to ethanol. The results show that, powders possess a perovskite structure after being annealed at 800℃ for 3 h. Their cell volume and grain size decrease with the increase of Mg2+ contentx. In all the gas sensors, the gas sensor based on Sm0.7Mg0.3FeO3 material exhibits higher resistance sensitivity and better selectivity under the same condition. The maximum resistance sensitivity of Sm0.7Mg0.3FeO3 gas sensor is 22.14 to ethanol gas (volume fraction: 100×10–6) under 240℃, is about 6.05 times as high as that of SmFeO3. The response time and recovery time are 31 s and 50 s, respectively.