硅酸镧镓压电晶体传感器的理论与应用研究-分析化学专业论文.docxVIP

山东师范大学硕士学位论文定性好，使用寿命长，灵敏度高等优点。并且通过数据解析，得到了六种有机溶剂乙 山东师范大学硕士学位论文 定性好，使用寿命长，灵敏度高等优点。并且通过数据解析，得到了六种有机溶剂乙 醇、丙酮、环己烷、四氯化碳、四氢呋喃和乙酸乙酯等在离子液体膜上的吸附量的信 息，为测量离子液体的吸附性能提供了一种新的方法，也可用于研制基于离子液体膜 的压电传感器。 4、在研究硅酸镧镓微天平的实验中发现了一个非常有趣的现象，即除了基频振荡 外，在高频率区段，还存在着类似于基频的振荡谱图，其强度比基频谐振峰的强度高1～ 2个数量级，我们称之为大波．大量的实验发现，大波对质量响应不敏感，但非质量因 素如电导率等对其振荡频率影响很大，实验测量了大波的一些基本性质，积累了第一 手的资料，但是还存有很多疑点，有待于进一步的研究。当我们对大波的起源和规律 有了比较明确的认识后，这种压电传感器的新响应模式，将应用于新的分析用途，甚 至可以联合传感器的基频和大波两种响应模式的信息，各取所长，为研究界面过程提 供更为丰富的化学信息。 关键词：硅酸镧镓、压电传感器、离子液体、吸附、大波 Ⅱ 山东师范大学硕士学位论文Study 山东师范大学硕士学位论文 Study in Theory and Applications of Piezoelectric Langasite Crystal Sensor ABSTRACT Studies with the microbalance sensor of hish sensitivity became popular after the original work of Sauerbrey in 1959．An increase in mass bound to the quartz卯rf犯causes the crystal’s oscillation frequency to decrease linearly．Nesx half a century has passed since Sauerbrcy’s work,piezoelectric quar乜crystal is the predominating piezoelectric material absolutely in microbalance Sellsor$due to its excellent physical and chemical properties． Hence，quartz crystal microbalance(QCM)is in fact the standard term for microbalauce Ⅱ垴吣sellsor．Recently,the rapid development in material science offers the opportlmity to study the microbalance s朗1sor beyond of quartz crystal．Langasite(La3GasSiOl4)single crystal is趾excellent material better than quartz crystal．In this dissertation,piezoelectric sensors made by a Y-cut langasite crystal躺reported and their responses are investigated． The main砖鼠d招w讹listed below． 1、The frequency responses ofresonators made from Y-cut langasite crystal in a liquid phase were investigated．It was shown that the oscillating frequency of the langasite resonator decreased with increasing the Sulfa∞mass loading,viscosiW(r1)and d,msity(p)of the liquid phase．The correlation ofthe frequency shift and the m鹪loading was similar to the Sauerbrey equation．A linear dependence of the frequency shift on the surface mass loading was obtained within 3％of the intAnsic frequency