Correlations of the impedance parameters and conductivity and permittivity of liquid and gel phases in a series piezoelectric quartz crystal sensor
作者： Minghui Huang , Dazhong Shen , Lai Man Chow , Mengsu Yang
DOI: 10.1016/S0925-4005(00)00627-4
关键词: Materials science 、 Dielectric spectroscopy 、 Wave impedance 、 Impedance parameters 、 Analytical chemistry 、 Conductivity 、 Relative permittivity 、 Permittivity 、 Electrical impedance 、 Debye–Falkenhagen effect
摘要: Abstract The impedance characteristics of a series piezoelectric quartz crystal (SPQC) sensor were investigated using network/impedance analyzer. correlations between the parameters, including magnitude and phase resonant frequencies, conductivity and/or permittivity test solutions derived theoretically in good agreement with experimental results. It was shown that value frequency ( f s ) decreases increasing liquid. parallel p is constant. values maximum (| Z| max corresponding max, ), are not related to minimum Z | min has solution middle conductivity. same as . θ increases slightly electrolyte In impedance–frequency curves, there an iso-impedance point for SPQC solutions. method applied monitor process hydrogel formation.
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