Synthesis and characterization of some conductimg oxides and sulphides

Güler, Halil


Synthesis and thermoelectric characterization of Ca3Co4O9 particles
Ertuğrul, Hediye Merve; Özenbaş, Ahmet Macit; Department of Metallurgical and Materials Engineering (2018)
Thermoelectric materials can convert waste heat to electrical energy as well as thermal energy to electrical energy. Thermoelectric technology can aid to solve the energy problem which causes global environmental problems as an alternative energy source and provide long-lasting power sources which can be used for space missions. Ca3Co4O9 is environment friendly, nontoxic, humidity resistant at high temperatures, oxidation resistant, abundant, chemically and thermally stable in air and light. Also, this mate...
Determination of the dynamic characteristics and local site conditions of the plio-quarternary sediments situated towards the north of Ankara through surface wave testing methods
Eker, Arif Mert; Akgün, Haluk; Department of Geological Engineering (2009)
The purpose of this study is to assess the engineering geological and geotechnical characteristics and to perform seismic hazard studies of the Upper Pliocene to Quaternary (Plio-Quaternary) deposits located towards the north of Ankara through surface wave testing methods. Based on a general engineering geological and seismic site characterization studies, site classification systems are assigned in seismic hazard assessments. The objective of the research is to determine the regional and local seismic soil...
Determination of the rock mass characteristics and support systems of the new Ulus Tunnel, Ankara
Aksular, Irem; Doyuran, Vedat; Department of Geological Engineering (2008)
The New Ulus Tunnel will be constructed within the andesitic terrain at Hıdırlıktepe (Ankara). Excavation of the tunnel will be accomplished through blast and drill method. Emprical methods will be consulted during the design of the support systems as well as the slope of the portal rock face. Therefore it is essential to perform detailed rock mass characterization studies. In this thesis it is aimed to determine the rock mass characteristics in order to design the rock slope of the portals and to assess th...
Mapping electrically active dopant profiles by field-emission scanning electron microscopy
Turan, Raşit; Houghton, DC (1996-09-09)
Secondary electron (SE) image contrast from p-type silicon has been studied using field-emission scanning electron microscopy (FE-SEM). Cross-sectional FE-SEM images of boron-doped silicon heterostructures have been compared with atomic concentration and free carrier profiles measured by secondary-ion mass spectroscopy and electrochemical capacitance-voltage profiling, respectively. FE-SEM image contrast due to dopants has been shown to be electronic in origin. Since electrically active dopant species contr...
Geology and joint analysis of the Derinkuyu and Kaymaklı underground cities of Cappadocia, Turkey
Mutlu, Mehmet Özgür; Toprak, Vedat; Department of Geological Engineering (2008)
This thesis attempts to detect the ignimbrite units in which the underground cities were carved and the relationship between the joints in these ignimbrites and the walls of underground cities. Orientation of rooms, directions of walls and joints are input data used in the study. Two sites in Cappadocia (Derinkuyu and Kaymaklı) are selected to investigate the relationship. Measurements taken from 46 rooms of Derinkuyu and 64 rooms of Kaymaklı are analyzed for the room and joint directions, joint locations i...
Citation Formats
H. Güler, “Synthesis and characterization of some conductimg oxides and sulphides,” Ph.D. - Doctoral Program, Middle East Technical University, 1996.