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Dissertations / Theses on the topic 'Technická keramika'
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1
Skokan, Jan. "Vliv plastifikátoru na technologii zpracování a vlastnosti slinovaného keramického mateiálu na bázi SiC." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231997.
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This master’s thesis deals with an influence of physical properties and machining technology at adjustment to the basic composition granules and production of technical ceramics. Selected series of experiments have been applied to the different phases of production. Composition of the granules vary according to the used plasticizer and ranks to RTP (ready-to-press) materials. The goal of this thesis is recomendation to the production of RTP granules and next experiments.
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Kudrna, Tomáš. "Elektroerozivní hloubení technické keramiky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417445.
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The master’s thesis deals with the topic of electrical discharge machining. The first part of the thesis contains a study of the die-sinking EDM. The die-sinking EDM of the silicon carbide ceramic is realized in the experimental part of the thesis. The result of this work was to explore the influence of the EDM sinking parameters, specifically pulse current, open-voltage and pulse on-time, on the machined surface. Furthermore, the analysis of the tool electrode was made. This analysis was focused on the wear in the corners, which has key influence on accuracy of the machining. The machining time was also examined.
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Habovštiaková, Mária. "Elektroerozivní drátové řezání technické keramiky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417109.
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The presented diploma thesis deals with the issue of wire electrical discharge machining of SiSiC ceramics. The first part explains the principles of electrical discharge machining, describes the WEDM technology and presents the properties of the advanced ceramics. The second part consists of a detailed analysis of the cutting process of eighteen samples obtained with systematically changing process parameters. Based on the obtained results from EDX analysis, SEM electron microscopy and topography there was performed an analysis of the influence of process parameters on the cutting speed, surface roughness, kerf width and number of wire breaks with usage of the selected brass cutting wire. From the evaluated results it was possible to select a combination of parameters that ensured a stable machining process.
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Kosina, Petr. "Planární obvodové prvky na technické keramice s nízkou teplotou výpalu." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-233551.
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The present work deals with the design and manufacturing of 3D structures in LTCC (Low Temperatue Cofired Ceramics) technology. To use this technology LTCC workplaces have been designed and technological processes for high quality reproducible production were suggested. Technological possibilities of low temperature co-fired ceramics were demonstrated in the design and manufacturing of pressure sensors, electrode systems for ozone generators, planar circuit elements (coils and transformers) and in the design a special package for middle-power terahertz modulator. Design of selected parts of respective devices was proved by simulations in COMSOL Multiphysics. The work provides new insights into the structure of power integrated circuits sleeves and structure of electrode systems for different types of electrical discharges. Results of this work can contribute significantly in the application of planar circuit elements, in the development of different types of sensors, in the design of atypical types of packaging or in the design of electrode systems for capacitive coupled electrical discharges.
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Robak, Lukasz. "Mikrowellenunterstützte Wärme- und Stoffübertragung beim Trocknen und Entbindern Technischer Keramik." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2009. http://nbn-resolving.de/urn:nbn:de:swb:105-4754246.
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Das Verlangen nach neuen Materialien mit Eigenschaften, die noch vor zwanzig Jahren für die Wissenschaft und Industrie unerreichbar waren, hat neue Perspektiven für die technische Keramik eröffnet. Auf Grund niedriger Aufheizraten und hohem Beschädigungsrisiko der Probe, ist das Entbindern das schwierigste und vor allem ein sehr teueres Verfahren. Im Rahmen dieser Arbeit wird eine mathematische Beschreibung des Entbinderungs-Prozesses geliefert und verschiedene Bindersysteme auf die Möglichkeit ihres Einsatzes bei MW-unterstütztem Entbindern von Keramiken untersucht. Um die rechnerischen Aussagen zu überprüfen, wurde eine Reihe von Versuchen in der auf dem thermogravimetrischen Prinzip basierenden Anlage zum Entbindern von Keramik durchgeführt. Aus den Versuchsergebnissen wurden Schlussfolgerungen gezogen und mit theoretischen Aussagen verglichen.
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Dauber, Olaf [Verfasser]. "Elastohydrodynamische Rollreibung in Stahl-Keramik-Kontakten = Elastohydrodynamic rolling friction in steel-ceramics-contacts / Olaf Dauber." Karlsruhe : KIT-Bibliothek, 2001. http://d-nb.info/1014060869/34.
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Hrdý, Radim. "Techniky přípravy elektrod s nanostrukturovaným povrchem a jejich charakterizace." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-233608.
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Nowadays, nanostructures fixed on solid substrates and colloidal nanoparticles permeate through all areas of human life, in area of sensors and detection as well. This dissertation thesis deals with the fabrication of nanostructures on the surface of planar electrodes via self-ordered nanoporous template of aluminum trioxide. The nanofabrication, as one of many possible techniques, is used to increase the active surface area of electrodes by creating unique surface types with specific properties. These electrodes are very perspective in the applications, such as biomolecules electrochemical detection and measurement. The transformation of aluminum layer into non-conductive nanoporous template in the process of anodic oxidation is a fundamental technique employed to obtain the array of nanostructures in this thesis. The fabrication of high quality nanoporous membranes with narrow pore size distribution on various types of metallic multilayers is one of the key experimental parts in this work. Several problems associated with the production of the thin-film systems, including the dissolving the barrier oxide layer, are discussed and solved. Another part of this work deals with the use of nanoporous membrane as a template for the production of metallic nanostructures via electrochemical metal ions deposition directly into the pores. The obtained nanostructures as nanowires, nanorods or nanodots are characterized by the scanning electron microscopy and energy-dispersive or wavelength X-ray spectroscopy. The electrode surface, modified by gold nanostructures suitable for the detection of biomolecules, has been chosen for the electrochemical measurements, due to the gold biocompatibility. The nanostructured electrodes were characterized by electrochemical impedance spectroscopy and cyclic voltammetry. The effect of nanostructured surface geometrical parameters, including the size of the electrochemically active area, on the results of electrochemical measurements has been observed and compared to flat gold electrodes. Two model biomolecules, namely guanine and glutathione, have been chosen for the study of potential application of these nanostructures in biosensors.
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Zvolský, Dalibor. "Minipivovar ve Vyškově." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226589.
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The master’s Thesis – Minibrewery in Vyškov, has a form of project documentation which contains relevant requirements according to valid regulations. The proposed building is situated on the plot number 2123/72 in the city Vyškov. It is a detached building which stands separately on the flat terrain. It is a two-storey building with partial basement. It is formed from three units – a minibrewery, a brasserie with kitchen and an administrative part. It is made of monolithic reinforced concrete frame, brick blocks with vegetative flat roof. The upper level attic gable is at the height of 8,880 meters. The seminar paper – minibrewery in Vyškov – is a part of the Master’s Thesis.
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Blinka, Jaroslav. "Rekreační apartmánový dům v Horní Bečvě." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-239965.
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The diploma thesis deals with the design of the holiday apartment house. The building with an irregular floor plan has four storeys and it is covered with a flat roof with vegetation in the level above 1.NP a gabled roof in a level above 4.NP. The apartment house offers ten separate apartment flats intended for temporary or permanent accommodation. It also includes a public area, including refreshments and relaxation zone with swimming pool.
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Písařík, Jan. "Polyfunkční dům v Brně Medlánkách." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226195.
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Master´s thesis “Multifunctional building in Brno Medlánky“ is processed in the form of project documentation. Multifunctional building is designed as a detached house with a flat roof. The object has four above-ground floors with no basement. In the object there are twelve flats and three shops altogether. The object is made of building system Porotherm.
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Voráč, Roman. "Penzion pro seniory." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240132.
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Content of this thesis is proces and structural layout design of subject „SENIORS’ BOARDINGHOUSE“. It’s a wide subject, which south wing is designed as single-storey with cellarage, central subject is two-storeyd without cellarage. Wooden shelters are connected to north and south wing. Architecture has been chosen in order to make a subject evoking calm and positive impression for retirement aged persons living. Roof structure is double-pitched shape with two main skylights. Roof is red coloured and a facade is white. Interior space of subject is designed to satisfy a demands for comfortable living of single persons (one-room flats) as well as retirement aged couples (2+KK flats). Round the subject there are situated further tinier subjects there designed for utilization by seniors, but for those who are still active. Subject is brick, founded on continuous footing and spreading slab. Roof structure is constructed of wooden bearing rafter framework which is, in case of main object, designed with central binding rafter and collar roof in case of north and south wing. Subject is insulated with External Thermal Insulation Composite System, roof is covered by ceramic roof covering in combination with folded sheet metal covering. Main living quarters is situated in first and second above-ground storey of central subject, restaurant with background lie in south wing and wellness available for public as well is situated in north wing. In basement of south wing there is technical background of whole subject situated there as is garage, technical room, service room, bicycle room and storage. Next the kitchen staff background including storages for kitchen lie here.
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Fridrich, Michal. "Sportovní centrum s restaurací v Holešově." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265438.
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The diploma thesis called ,,Sports center with restaurant in Holesov” is written in form of implementing project documentation and contains all requirements according to current laws. Proposed object is located on a plot 461/1 in Partyzanska street, Holesov. The object is separate building situated into north part of the plot. The designed building has two floors, no basement and is covered with flat roof. Foundations of the building are design as foundations strips with concrete slabs under column. Vertical carrier system, non-carrier constructions and separating constructions of the building contain ceramic clay block Porotherm. The carrier system is supported by reinforced concrete. Ceiling construction is made of ceiling panels Spiroll. The flat roof contains heat-insulation wedges and roof drains and overflows insurance for drainage. Main walls are covered with contact insulation system and the visual part of facade is made of facade blocks Cembrit Solid mounted to wooden grate which are attached to metal anchors. The object is divided into two main parts with shared entrance. First part is located in the ground floor and is designated for restaurant, bowling centre and back office including kitchen and bar. The other part of the building is designated for sports use. The ground floor contains two squash courts with facilities and first floor is divided into parts prepared for a gym and group lessons like spinning. This separate part has its own changing rooms and toilets with showers. The designed object is barrier-free. There is also a parking with 65 lots for vehicles. Four of them are designated for disabled visitors.
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Kohut, Lukáš. "Zázemí fotbalového klubu Lučina." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226395.
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This Project includes the background of the football club Lučina. The object is situated in the community center of Lučina. The house has three floors. There is a utility room, storage room, laundry facilities and rehabilitation facilities for football players (gym, sauna, jacuzzi, massage) in the basement. In the 1st floor is a locker room with showers for the players and the public buffet. In a separate part is a toilet and garage. In the 2nd floor is an apartment with terrace and facilities for the officers of club. The house is made from brick technology of ceramic blocks. The building is covered with shed roof and vegetation.
14
Nan, Bo. "Výzkum nových elektrokeramických struktur pro nové aplikace senzorů." Doctoral thesis, Vysoké učení technické v Brně. CEITEC VUT, 2019. http://www.nusl.cz/ntk/nusl-408056.
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Piezoelektrické keramické materiály jsou široce používány v mnoha aplikacích a průmyslových odvětvích, nicméně tradiční materiály obvykle obsahují olovo, které je toxické vůči životnímu prostředí. Většina zemí proto zavedla zákony a omezení, které postupně minimalizují spotřebu olova a podporují výzkum v oblasti bezolovnatých kompozic, které by nahradily olověné protějšky. Bezolovnatá piezoelektrická keramika se tak stala žhavým tématem v posledních letech. Nicméně výzkumy na praktické využití bezolovnatých piezoelektrických materiálů jsou jen zřídka publikovány. V této diplomové práci byl vybrán jeden z nadějných kandidátů na piezoelektrickou bezolovnatou keramiku (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 za účelem zkoumání metody snížení jeho vysoké teploty slinování pomocí dotování uhličitanem lithným, kde syntéza prášku byla připravená pomocí techniky sol-gel. Výsledky byly srovnány s konvenčním práškem syntetizovaným v pevné fázi. Vzorky vyrobené ze sol-gel prášku dopovaného 0.5% hmotn. uhličitanem lithným a slinované při 1300 °C po dobu 2 hodin vykazovaly d33 = 447 ± 9 pC N–1, teplotu Curie 98.7 °C a velikost zrn 7.0 ± 0.3 m. Další důležitou otázkou pro aplikace bezolovnatého piezoelektrického keramického materiálu je jeho výroba v různých konfiguracích. Použitím techniky odlévání pásky a aditivních výrobních postupů byla piezoelektrická keramika zpracována do tří různých konfigurací (2-2, 3-3 a 1-3), aby se překlenula mezera mezi materiálovými vědami a materiálovým inženýrstvím. Pro dolévání pásky byly použity suspenze na bázi oleje a vody. Pro přípravu neslinutých keramických fólií bez trhlin, byly pro odlévání na bázi oleje vyvinuty uhlíkové suspenze s obsahem pevných látek 25% hmotn. a BCZT suspenze s obsahem pevných látek 65% hmotn. Problém práškové hydrolýzy ve vodných suspenzích byl vyřešen povrchovou úpravou prášku Al(H2PO4)3, což umožnilo, aby byly tlusté vrstvy bez trhlin odlety v jednom kroku. Tlusté vrstvy slinované při 1500 °C vykazovaly relativní dielektrickou konstantu 1207, dielektrickou ztrátu 0.018 při 1 kHz, remanentní polarizaci 7.54 µC/cm2 a koercitivní síla intenzity pole (Ec) 0.23 kV/mm při 3 kV/mm. Pro tvarování BCZT v konfiguraci 3-3 a 1-3 byla použita přímá metoda tisknutí inkoustu. Pro správnou úpravu tiskového procesu byla použita inkoustová náplň s viskoelastickým chováním obsahující 41.6% obj. pevných látek BCZT a se zpracovatelskými přísadami (HPMC ~ 2.4% a PEI ~ 0.03%). Vzorky v konfiguraci 3-3, slinované při 1500 °C, vykazovaly nejvyšší dielektrické a piezoelektrické vlastnosti, kde Curieho teplota = 86 °C, tan = 0.021, remanentní polarizace = 4.56 µC/cm2 a d33 = 100 ± 4 pC/N. Vzorky v konfiguraci 1-3 slinované při 1500 °C, které byly smíchány s epoxidem, vykazovaly dielektrickou konstantu 144 a dielektrickou ztrátu 0.035 při 1 kHz. Tato práce popisuje tvarování bezolovnaté piezoelektrické keramiky s vynikajícími vlastnostmi v pokročilých strukturách jako krok k návrhu pro moderní senzorické a energy harvesting aplikace.
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Kolesa, Jiří. "Polyfunkční dům ve Strakonicích." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265574.
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The subject of this thesis is the design and project documentation of a new multifunctional house in Strakonice. The building has four floors, without basement, and is located on a slightly sloping land in the suburban part of the town of Strakonice. It is based on shallow foundations and covered with a flat roof. It is a transverse wall structural system, build with clay block masonry, with the semi-assembled ceiling structures of ceramic and concrete beams and inserts. It is conceived as a double-aisle layout. The ground floor of each wing consists of the establishment of shops and house facilities. The overground floors are designed as six residential units of varying size category. Both tracts have separate entrances to both the residential portion and to individual businesses. The building is designed from traditional building materials. In addition to the architectural construction and civil-engineering design, a part of this project is also a fire safety design and an assessment from the perspective of building physics.
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Zdražilová, Barbora. "Penzion s hipoterapií." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227259.
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The subject of the diplom work was to prepare a detailed project documentation of the penzion with hippotherapy in Veseli nad Moravou. This is a document processing house with two floors and the building stables. The object of the pension are located accommodation rooms, dining room and especially apartment manager. The building is located 12 stables are housed boxes, feed stores and higienické facilities for guests.
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FRAŇKOVÁ, Magdalena. "Keramika na 1. stupni ZŠ." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-381128.
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At the beginning of the theoretical part the objects and tasks of the theses are defined. There are also described the teaching methods of project teaching at the primary schools. History of ceramics from all over the world from the Neolithic period is an integral part of the theoretical part. The forming techniques, modeling, glazing and burning techniques are described as well. In the practical part ten ceramics themes to the project teaching at the first grade of primary school are designed. There is a didactic documentation for teachers for each theme.
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Schumacher, Benedikt [Verfasser]. "Polymer-Keramik-Komposite mit optimierten dielektrischen Eigenschaften für elektronische Bauelemente / vorgelegt von Benedikt Schumacher." 2010. http://d-nb.info/1006537740/34.
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Robak, Lukasz. "Mikrowellenunterstützte Wärme- und Stoffübertragung beim Trocknen und Entbindern Technischer Keramik." Doctoral thesis, 2005. https://tubaf.qucosa.de/id/qucosa%3A22528.
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Das Verlangen nach neuen Materialien mit Eigenschaften, die noch vor zwanzig Jahren für die Wissenschaft und Industrie unerreichbar waren, hat neue Perspektiven für die technische Keramik eröffnet. Auf Grund niedriger Aufheizraten und hohem Beschädigungsrisiko der Probe, ist das Entbindern das schwierigste und vor allem ein sehr teueres Verfahren. Im Rahmen dieser Arbeit wird eine mathematische Beschreibung des Entbinderungs-Prozesses geliefert und verschiedene Bindersysteme auf die Möglichkeit ihres Einsatzes bei MW-unterstütztem Entbindern von Keramiken untersucht. Um die rechnerischen Aussagen zu überprüfen, wurde eine Reihe von Versuchen in der auf dem thermogravimetrischen Prinzip basierenden Anlage zum Entbindern von Keramik durchgeführt. Aus den Versuchsergebnissen wurden Schlussfolgerungen gezogen und mit theoretischen Aussagen verglichen.