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Original title in Czech: Chemie, technologie a vlastnosti materiálůFCHAbbreviation: DPCO_CHM_4Acad. year: 2014/2015
Programme: Chemistry, Technology and Properties of Materials
Length of Study: 4 years
Accredited from: 30.4.2012Accredited until: 31.5.2016
Profile
The aim of the study is to educate experts in the field of materials engineering and engineering technology with an emphasis on chemical processes and material properties. In studies are also included basics of testing and measuring methods that the students were able to work not only as a leading technology teams in chemical plants, but also in basic and applied research, research and development institutes involved in the testing of physical-chemical characteristics of substances and in dedicated production promising new materials. This is also directed domestic and international internships. The inclusion of practical exercises doctoral students acquire basic experience with students, allowing them in the future can be integrated into the process of teaching at universities and secondary schools.
Key learning outcomes
Chemistry graduate DSP technology and material properties is able to formulate a scientific problem, propose a hypothesis to solve it and make experimental and theoretical attempts to confirm it. An integral part of the basic knowledge of graduate DSP is the ability to critically assess published scientific information and the ability to express oneself in writing in the English language
Occupational profiles of graduates with examples
Graduates of Chemistry, Technology and material properties are equipped with both experimental and theoretical knowledge in the field of material structures and their properties. They control a number of methods for the characterization of materials not only at the level of theoretical description , but are also familiar with the practices of their use in practice ( a lot of information gain among others, during internships at foreign universities ) . Stays allow them to also expand your language skills. Theoretical foundations of obtain in appropriately selected subjects. Graduates also have experience in the provision of information and presentation of results at conferences and professional seminars , not only in Czech , but also the English language. Doctoral students are also encouraged to independent and creative thinking and technological foresight , allowing them to solve technological problems in a number of operations. Given that the study course " Chemistry, Technology and Properties of Materials " is a modern -conceived field of doctoral study, which is based on the current state and needs of the chemical, electronic and consumer goods industries , graduates are eligible to work in both the industrial sector and areas applied and basic research. It should be noted that the graduate study program also has a basic knowledge of chemistry and physics. The general basis is extended by special courses that include, for example, the progress of chemistry and physics , nanotechnology , use of secondary raw materials, bioengineering and the use of chemical and physical laws in the areas of inorganic and organic compounds.
Entry requirements
The knowledge of general chemical, physical and physico-chemical concepts and laws of the extent provided for in the comprehensive master's examination of chemistry, physics and physical chemistry at the Brno University of Technology eventually. other similar focus BUT faculties and university faculties directions. Other assumptions are: interest in engineering and scientific work, knowledge of English and good academic performance in previous studies (better than average grade 2).
Guarantor
prof. Ing. Martin Weiter, Ph.D.
Issued topics of Doctoral Study Program
Nowadays the increasing demands on the elimination of industrial waste products discharged into the atmosphere are placed. The main substance of the waste gases` mixture is nitrogen and there are several methods how the nitrogen content should be eliminated. All of the applied denitrification processes use ammonium water or urea as primary reactants and due to this fact there are some unfavourable by-products, especially ammonium hydrogen sulphate. Ammonium hydrogen sulphate even in small concentration (100 – 400 ppm) will annihilate fly ash as valuable additive in concrete (due ČSN EN 450). Under the acidic conditions (i.e. after mixing with cement) ammonium hydrogen sulphate is decomposed and consequently unfavourable gaseous ammonia is formed. The main objective of the thesis will be the bulk study of fly ashes with various content of hydrogen ammonium sulphate and development of possible industrial application. Further the suggestion how to eliminate their unfavourable influence in concrete applications will be studied.
Supervisor: Havlica Jaromír, prof. Ing., DrSc.
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The work will be focused on the study and development of ballistic resistant concrete and composites suitable for population and critical infrastructure protection. The main goal of the work will be mainly study of high-performance concretes with high content of dispersed or/and oriented types of various reinforcement.
Supervisor: Ptáček Petr, prof. Ing., Ph.D.
The work will study the possibilities of protection of concrete elements exposed to the environment rich in algae, mosses etc. The work will deal with the possibilities of protection of current concrete elements which undergo the biocorrosion due to algae growth, also it will be focused on the incorporation of protection agents from such processes straight into the fresh mixture, so the concrete surface can be biocorrosion resistant.
The doctoral thesis will deal with screening and analysing of some bulk-volume produced wastes mostly from power and metal industry. Based on the analysis results the following experiments will search for conventional mostly inorganic production processes and the efforts will be made to replace as much raw material by the secondary raw material as possible. Selected secondary raw materials are expected to be applied in practice.
Preparation of coatings formed by conversion layer and organic paints. Characterisation of structure (metallography, SEM/EDS) mechanical testing. Study of relationship between chemistry of coating and its structure and properties.
This work includes optimization of the vacuum deposited thin films, their characterization by modern techniques as AFM, profilometer and optical aberation methods and preparation of prototypes of organic electronic devices (e. g. solar cells, OLEDs, gas sensors, and OFETs) and estimation of their working parameters and performance.
Supervisor: Zhivkov Ivaylo, doc. Mgr., Ph.D.
The work includes construction of modules and devices for electrical measurement of thin organic films, performance of measurements and development of models for explanation of the observed phenomena.
Potentiodynamic test using EIS method. Characterisation of surfaces of metals with XPS,SEM/EDS/WDS. Other corrosion tests (immersions, test chambers). Evaluation of relationships between electrochemical parameters and coatings´ chemical structure.
Supervisor: Weiter Martin, prof. Ing., Ph.D.
The work is focused on the study of the relationship between chemical structure and properties of new materials for organic electronics and photonics. The work includes the characterization of new materials, the study of energetic interactions using optical and electrical methods, the design of model devices of organic electronics and photonics and their characterization. Typical applications will include organic solar cells, organic light-emitting devices, organic transistors, solid-state lasers, etc. For the studies, the optical spectroscopy (absorption, fluorescence, fluorescence quantum yields, etc.) and time-resolved optical methods (fluorescence, transient absorption, etc.) will be used. Methods for electrical and optoelectronic characterization will be also used.
Supervisor: Vala Martin, prof. Mgr., Ph.D.
The research within this Ph.D. these will be divided into the branches of particle based, fiber based and combined composites. Various types and combinations of reinforcement in composites based on inorganic matrix will be studied and compared. Works will also include research on composites with alkali activated aluminosilicate matrix. Also the optimal reinforcement of composites, materials, shape and applicability from the viewpoint of corrosion and used binding system will be investigated.
Amorphous materials a-C:H, a-SiC:H a a-SiOC:H in a form of thin film will be deposited by plasma polymerization and studied using spectroscopic ellipsometry. Student will familiarize in details with phase modulated spectroscopic ellipsometry. The study is aimed at optical properties of single layers, functional multilayers, and gradient films. The thickness of individual layers in layered structures will be diminished below 100 nm. Dispersion curves for the refractive index and the extinction coefficient will be studied in correlation with chemical properties and film structure. The kinetic mode of ellipsometry will be used to investigate film growth. An effect of film thickness on optical properties will be discussed as well. Differentiation limits for individual layer in layered structures will be determined using ellipsometric measurements and model simulation. The results may be used to construct sophisticated optical and optoelectronic devices.
Supervisor: Čech Vladimír, prof. RNDr., Ph.D.
This work includes development of a spray method and device, spray deposition of thin films, their characterization and preparation of prototypes of organic electronic devices (e. g. solar cells, OLEDs, gas sensors, and OFETs) and estimation of their working parameters and performance.
The interphase in polymer composites containing relatively sharp interfaces between the individual phases greatly reduces the performance of these materials. We start our concept of polymer composites without interfaces (inspired natural materials), where a gradient interlayer between the reinforcement and the polymeric matrix is designed to vary chemical and physical properties continuously from those of the reinforcement to those of the matrix. Model simulations with gradient interlayer enable to design the mechanical properties of the interlayer to simultaneously increase both the strength and the toughness of the resulting composite. Proposed gradient interlayer can be realized by using plasma-enhanced chemical vapor deposition with time-dependent deposition conditions enabling to control the interlayer adhesion at both the interfaces with the reinforcement and the matrix. The study will focus on the use of newly developed technological apparatus designed for the preparation of gradient interlayers and their application to fiber-reinforcement composites. The study will be an extensive analysis of chemical and physical properties of interlayers and their application in fiber-reinforced composites. The results and experience will enable to increase performance of polymer composites to a whole new level of smart materials.
PhD thesis will be focused on the study of synthetic aggregates` preparation via various methods with the using of secondary raw materials coming energetic industry. The goal will be determination of optimal and available method and composition for preparation of synthetic aggregates based on high-temperature ashes. The emphasis will be given on the study of bulk properties and formation mechanisms of used or/and synthetized materials and their successive application in industry.
The work will deal with the study upon the formation of tobermorite and with the explanation of kinetics of processes, which take place during the tobermorite formation. The aim is to find propper raw materials and the method of tobermorite preparation. The work will study the regular hydrothermal process from common raw materials as well as new methods of the tobermorite preparation i. e. the sol-gel process.
Carbon-based materials play a major role in today’s science and technology. In general, an hydrogenated amorphous carbon (a-C:H) can have any mixture of sp3, sp2, and even sp1 sites with the possible content of hydrogen atoms. Atomic polymerization may enable to construct amorphous carbon alloys by atomic (not molecular) processes varying the ratio between sp3 and sp2 hybridizations, varying the specific bond energy of additional (dopant) atoms bound to carbon, and varying the hydrogen content influencing the level of network cross-linking. Within the study, the student will concentrate on amorphous carbon alloys based on polymer-like a-C:H and diamond-like a-C:H and their modifications that may be synthesized as functional materials of controllable physical, chemical, and surface properties by atomic polymerization. Physical properties (mechanical, optical, electronic) of built-up amorphous carbon alloys may result from their chemical structure. Progressively developed amorphous carbon alloys are inevitable for future sophisticated optical, mechanical, and electronic devices.
PhD thesis will be focused on the study of time and/or type of storage, bulk properties and application possibilities of various types of fly ashes. The main goal of the work will be description of the relation between storage and final quality of fly ashes. Experimental part of the work will be maintained on the outside and inner types of fly ash` stores. The chemical/phase composition and pozzolanic activity will be key factors of time dependence study
The work will be focused on the study of dielectric properties (complex permittivity) of bulk materials used for cooling the photovoltaic cells. To study methods will be used impedance spectroscopy and DC measurements
Supervisor: Zmeškal Oldřich, prof. Ing., CSc.
The work includes development of modules and devices for dip-coating film deposition, optimization of the deposition parameters, characterization of the films prepared for the purpose of organic electronics.
The research work will focus on the study of surface properties of thin films used in the preparation of the structures of photovoltaic cells and FET transistors. Part of the work will be oriented to the preparation of films by spin coating and inkjet printing. Results will be used to optimize the structure of layers of electronic components in terms of homogeneity of surfaces and definition of structures. Attention will be paid to the study of refractive index layers and their dispersion dependence. For the study will be used methods of profillometry and ellipsometry,. The methods of correlation and fractal analysis of image structures will be used for the characterisation of surfaces. The theory of signal and image analysis will be also developed.
The work will be focused on the study of the rings formation mechanism in the in cement rotary kilns. The unfavorable rings built-up and their growth cause irreversible decrease of inner place of the kilns and ends with the furnace shutdown. The main emphasis will be given on bulk analyses of the reactants - “cement meals”, formed stickers, kiln `s lining beneath and around of the new-formed rings and finally fuels. On the base of obtained results the conditions and kinetics of rings’ formation will be determined. Under the determined findings the rings` formation and growth prevention will be suggested.
Atomic force microscopy (AFM) will be used to investigate surface properties of untreated and surface modified fibers (glass, carbon) employing contact and semicontact mode recording the surface topography, error signal, phase distribution, and lateral forces. Untreated fibers, plasma treated and plasma polymer coated fibers will be studied. Unique measurements of near-surface mechanical properties of fibers will be carried out by nanoindentation. Scratch test of coated fiber to evaluate the film adhesion will be a challenge for PhD student. Acquired knowledge about surface and mechanical properties of fibers results in improved compatibility of fibers in hybrid materials.
The topic of thesis is synthesis and structural characterization of various substituted building blocks, its chemical modification and incorporation to π-conjugated oligomers with emphasis to prepare of novel semiconducting materials for organic electronics such as organic photovoltaic devices, electrochromic devices etc.