甘氨酸-硝酸盐法制备La_2Fe_xCu_(l-x)O_4及其氧敏性能  

Preparation of La_2Fe_xCu_(l-x)O_4 by the Glycine-nitrates Process and Oxygen-sensing Properties

作　　者：赵伟杰[1] 张晶[1] 

机构地区：[1]台州职业技术学院生物与化工学院,台州318000

出　　处：《硅酸盐通报》2013年第3期405-408,共4页Bulletin of the Chinese Ceramic Society

基　　金：辽宁省自然科学基金资助项目(No.20092177)

摘　　要：采用甘氨酸-硝酸盐法制备了K2NiF4结构的La2FexCul-xO4(x=0.01-0.05)复合氧化物,制成了厚膜型氧敏元件。采用XRD、SEM等手段对烧结体的晶体结构和表面的微观形貌进行了表征和分析。并通过改变氧敏元件的烧结温度、涂膜厚度、添加高温玻璃粉含量等工艺条件来考察对其氧敏性能的影响。实验结果表明:当0≤x≤0.05时,可以形成K2NiF4结构的A2BO4复合氧化物。膜厚为20μm、800℃烧结、高温玻璃粉含量为5%的厚膜型La2Fe0.05Cu0.95O4在700℃工作时的灵敏度可以达到3.6。Perovskite-type oxide La2 Fex Cu1- x O4 （ x = 0. 01-0. 05 ） was synthesized by the glycine＊nitrates process. The thick film type oxygen-sensing sensor was prepared. X-ray diffraction （XRD） and scanning electron microscopy （SEM） were employed to characterize the morphology, crystal structure, surface structure of the samples. The effects of sintering temperatures, thickness and the content of glass powders on the oxygen-sensing properties of the thick films were investigated. Experimental results show that when 0≤x≤0.05, They can form the structure of K2NiF4. The sensitivity of thick film La2Fe0.05 Cu0.95 O4 （ sintering at 800 ℃, 20 μm thickness, 5wt% glass powder） has a maximum of 3.6 at 700 ℃ work and the response time is short for 3s.

关 键 词：制备La2FexCul-xO4 氧敏性 甘氨酸-硝酸盐法 

分 类 号：TQ174[化学工程—陶瓷工业]