Preparation of Extruded Titanium Oxide Ceramics, Characterization of Structure and Properties
2013
Agnese Pūra

Defending
05.06.2013. 14:00, Rīgas Tehniskajā universitātē, Materiālzinātnes un lietišķās ķīmijas fakultātē, Āzenes ielā 14/24, 272.auditorijā

Supervisor
Līga Bērziņa-Cimdiņa

Reviewers
Jānis Grabis, Visvaldis Švinka, Jānis Zicāns

In this work obtaining of electroconductive TiO2-x ceramics and the dependence of properties of these ceramics on technological processes is researched. The dependence of properties of TiO2 on various parameters, particularly the formation of non-stoichiometry TiO2 and its impact on electric properties of the ceramic, is discussed in literature review. One chapter of review of literature is dedicated to technology of extrusion process. In the first section of experimental part the development of optimal extrusion mass compositions is described. The extrusion mass contains TiO2 (anatase) powder, additives (binder, oil) and water. Low-quality products are recycled – waste-free manufacture of TiO2 ceramics has been developed. In the second section of experimental part thermal treatment conditions are researched, taking into account the temperatures at which additives are degraded, the temperature at which anatase phase converts to rutile phase and the sintering temperature interval. By changing the thermal treatment conditions it is possible to obtain ceramics with various grain sizes and relative density. In the third section of experimental part research the electric and thermoelectric properties of TiO2 ceramics after additional thermal treatment in vacuum conditions are presented. It was ascertained, that by changing the thermal treatment parameters it is possible to predict the application of obtained materials as materials for electrodes or thermoelectric materials.


Keywords
TITANIUM DIOXIDE, ADDITIVES, EXTRUSION, THERMAL TREATMENT, ELECTRIC PROPERTIES, THERMOELECTRIC PROPERTIES

Pūra, Agnese. Preparation of Extruded Titanium Oxide Ceramics, Characterization of Structure and Properties. PhD Thesis. Rīga: [RTU], 2013. 141 p.

Publication language
Latvian (lv)
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