Course detail
Elektrotechnology
FSI-WET Acad. year: 2024/2025 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
Entry knowledge
Fundamental knowledge of the physics and matematics on the level of Secondary school.
Rules for evaluation and completion of the course
Course-unit credit is awarded on the following conditions: active participation in lessons – 40 credits.
The exam has a written part only – 60 credits.
Lecture – optional
Labs and studios – participation required
Aims
Classification of important materials and the state – of – art in their research and development.
The survey of materials in electrical engineering.
The study programmes with the given course
Programme C-AKR-P: , Lifelong learning
specialization CLS: , elective
Programme B-ZSI-P: Fundamentals of Mechanical Engineering, Bachelor's
specialization MTI: Materials Engineering, compulsory
Type of course unit
Lecture
26 hours, optionally
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
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