Course detail
Elektrotechnology
FSI-WET Acad. year: 2022/2023 Summer semester
A survey of materials important for electrical engineering. Their properties and field of application. Metals, semiconductors, insulators, magnetic materials.
Language of instruction
Czech
Number of ECTS credits
5
Supervisor
Learning outcomes of the course unit
The survey of materials in electrical engineering.
Prerequisites
Fundamental knowledge of the physics and matematics on the level of Secondary school.
Planned learning activities and teaching methods
The course is taught through lectures explaining the basic principles and theory of the discipline. Teaching is suplemented by practical laboratory work.
Assesment methods and criteria linked to learning outcomes
Course-unit credit is awarded on the following conditions: active participation in lessons – 40 credits.
The exam has a written part only – 60 credits.
Aims
Classification of important materials and the state – of – art in their research and development.
Specification of controlled education, way of implementation and compensation for absences
Lecture – optional
Labs and studios – participation required
The study programmes with the given course
Programme B-ZSI-P: Fundamentals of Mechanical Engineering, Bachelor's
specialization MTI: Materials Engineering, compulsory
Type of course unit
Lecture
26 hours, optionally
Teacher / Lecturer
Syllabus
Materials for electrical engineering
1. Materials for electrical engineering; modification of their properties by the changes of composition and structure. Band diagram of solid bodies and its influence on conductivity. Electronic, ionic and electroforetic conductivity.
2. Metallic materials. Electric conductivity of metals. Contact potential difference. Corrosion of metals. Materials as conductors, resistor materials, materials for contacts. Solders. Carbon for electrical engineering. Superconduction and superconductors.
3. Semiconductors. Intrinsic and extrinsic semiconductors. Thermodynamic equilibrium in semiconductors. Electric conductivity, the influence of temperature and intensity of electric field. Hall effect, magnetoresistance, thermoelectricity, Peltier effect. Classification of semiconductors with respect to structure and composition.
4. Dielectrics and insulators. Electric conductivity, influence of temperature and intensity of electric field. Mechanisms of polarization, polarization in a.c. and/or d.c. fields. Dielectric losses, breakdown if insulator. Electrostriction, piezoelectricity, pyroelectricity. Gaseous, liquid and solid insulators.
5. Magnetic materials. Ferromagnetics, ferrimagnetics, orbital and spin magnetic momentums, domain structure. The curve of primary magnetization, hysteresis loop. Magnetically soft and hard materials. Materials for recording of signals. Amorph and glassy metals.
Laboratory exercise
26 hours, compulsory
Teacher / Lecturer
Syllabus
Laboratory measurement
1)Investigation of temperature influence on conductive materials and materials for
resistors
2)Estimation of specific losses of ferromagnetic materials by means of an oscilloscope.
(Measurement of specific losses by calorimetric method).
3)Measurement of thermoelectric voltage of metals by a digital system HP 3497 A
4)Measurement iof relative permitivity and loss factor using an accurate RCLG meter
5)Measurement if initial permeability of ferrites
6)Measurement of internal and surface resistivites of insulators using the megaohmmeter HP
4339B
7)Estimation of bandwidth of semiconductors };measurement of temperature influence on
resistivity of a semiconductor
8-10) excursions,
11-13) seminary lesson