This lecture starts from the introduction of some basic quantities used for describing dielectric property of substances such electric field, electric displacement, polarization, dipole momentum etc. The polarization is the most important concept in the physics of dielectrics. Polarization mechanisms including frequency dispersion are explained in detail. For understanding electronic polarization, the concept of local field should be explained using classical Lorenz local field theory. The Clausius-Mossotti relation is explained for understanding microscopic electronic polarization and macroscopic dielectric constant. In the latter part in the lecture, frequency dispersion of polarization mechanism is explained, and applications of piezoelectric, pyroelectric and ferroelectric materials are introduced.
The purpose of this lecture is to understand the basic concept and applications of ceramic dielectrics by learning some important physical constants to describe dielectric phenomenon. Furthermore, this lecture tri to educate students to think the applications of dielectric materials using knowledge of polarization mechanisms based on material science.
dielectric, polarization, dielectric dispersion, complex dielectric constant, ferroelectricity
|Intercultural skills||Communication skills||Specialist skills||Critical thinking skills||Practical and/or problem-solving skills|
Lecture style is a normal classroom lecture. Printed documents are supplied as necessary.
|Course schedule||Required learning|
|Class 1||Classification of materials in terms of electric conductivity and some basic quantities||Understanding classification of materials in terms of electric conductivity and some basic quantities|
|Class 2||Classification of polarization: electronic, ionic, dipole and interfacial polarizations||Understanding classification of polarization|
|Class 3||Electric field in dielectrics and external field, Lorenz field||Electric field in dielectrics and external field, Lorenz field|
|Class 4||Electronic polarization and electronic polalizability||Understanding electronic polarization and electronic polalizability|
|Class 5||Clausius-Mossotti relationship||Understanding Clausius-Mossotti relationship|
|Class 6||Complex dielectric constant and equivalent circuit of dielectrics||Understanding complex dielectric constant and equivalent circuit of dielectrics|
|Class 7||Electronic polarization and its frequency dependence||Understanding electronic polarization and its frequency dependence|
|Class 8||Ionic polarization and its frequency dependence||Understanding ionic polarization and its frequency dependence|
|Class 9||Lyddane-Sachs-Teller relation||Understanding Lyddane-Sachs-Teller relation|
|Class 10||Dipole polarization and its frequency dependence||Understanding dipole polarization and its frequency dependence|
|Class 11||Interfacial polarization and its frequency dependence||Understanding interfacial polarization and its frequency dependence|
|Class 12||Kramers-Kronig relation||クラマース・クローニッヒ関係を理解する|
|Class 13||Classification of dielectric||Understanding Classification of dielectric|
|Class 14||Piezoelectric and pyroelectric materials and applications||Leaning piezoelectric and pyroelectric materials and applications|
|Class 15||Ferroelectric materials and applications||Learning ferroelectric materials and applications|
Introduction to solid state physics, C.Kittel, Wiley
Afternoon of the lecture date