论文部分内容阅读
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。
A K2NiF4-structured La2FexCul-xO4 (x = 0.01-0.05) composite oxide was prepared by glycine-nitrate method to prepare a thick-film type oxygen sensor. The crystal structure and microstructure of the sintered body were characterized and analyzed by means of XRD and SEM. And by changing the sintering temperature of oxygen-sensitive components, the thickness of the coating, adding high-temperature glass powder content and other technological conditions to examine the oxygen sensitivity performance. The experimental results show that A2BO4 complex oxide with K2NiF4 structure can be formed when 0≤x≤0.05. Thickness of 20μm, 800 ℃ sintering, high-temperature glass powder content of 5% of the thick film type La2Fe0.05Cu0.95O4 at 700 ℃ sensitivity when the work can reach 3.6.