C8930 Methods of plasmochemical conservation

Faculty of Science
Spring 2012
Extent and Intensity
2/0/0. 2 credit(s) (fasci plus compl plus > 4). Type of Completion: zk (examination).
Teacher(s)
Mgr. Miloš Klíma, Ph.D. (lecturer)
Guaranteed by
Mgr. Miloš Klíma, Ph.D.
Department of Chemistry – Chemistry Section – Faculty of Science
Supplier department: Department of Chemistry – Chemistry Section – Faculty of Science
Prerequisites (in Czech)
Předpoklad absolvování přednášky "Metody vakuové konzervace" C5975
Course Enrolment Limitations
The course is also offered to the students of the fields other than those the course is directly associated with.
fields of study / plans the course is directly associated with
Course objectives
Current methods of conservation of archaeological artefacts used in museums are usually based on mechanical or chemical cleaning. They often cause rather degradation of objects than their regeneration. The application of low pressure hydrogen plasma allows fine regeneration of corroded metal artefacts.This technology offers very good results. Gradual reduction of the corrosion compounds back into the metal allows preserving the original relief of the object at the minimisation of its mass losses (e.g. silver coins, brocade, etc.). The museum collections contain great amounts of artifacts composed of the combination of various, mostly inseparable materials like glasses, metal etc. The currently used conservation procedures do not allow to clean, to stabilize and to conserve these artifacts efficiently and considerately. The plasma pencil was developed in our laboratory in 1998, for the local treatment of artefacts (glass, metal, ceramics) at atmospheric pressure or under the level of liquids. The advantage of this method is in its operation on the interface between solid, liquid, gas and plasma and effectively solves the above mentioned problem.
Syllabus
  • 1. Introduction, plasma and basic concepts (collision processes, Debye radius, plasma frequency, Boltzmann kinetic theory.
  • 2. Transport processes in plasma, plasma electromagnetic properties (diffusion coefficient and conductivity of plasma, dielectric properties of plasma, permitivity and index of refraction, propagation of electromagnetic waves in plasma).
  • 3. Discharge in gas. Towsend theory, Paschen law, terms of high-frequency discharge striking).
  • 4. Types and characteristics of discharges.
  • 5. Low-pressure discharges.
  • 6. High-pressure discharges (arc, surface and barrier discharges, corona, plasma pencil, plasmatron).
  • 7. Plasma chemistry.
  • 8. Interaction of plasma with solids and liquids.
  • 9. Diagnostic methods of plasma (optical and mass spectrometry, electrical determinations, probe measurements, optical microscopy) .
  • 10. Plasmochemical reduction (metals) .
  • 11. Plasmochemical coating, surface activation-passivation (metal, glass, ceramics, textile, paper) .
  • 12. Plasma pencil, treatment of the surface in liquids and free atmosphere (metal, glass, ceramics, textile, paper).
  • 13. Laser (principles, laser kinds).
  • 14. Laser ablation (metal, stone, paper).
Literature
  • CHEN, Francis F. Úvod do fyziky plazmatu. Translated by Karel Rohlena. Vyd. 1. Praha: Academia, 1984, 328 s. URL info
Teaching methods
introduction to theory
Assessment methods
lectures, class discussion, exam
Language of instruction
Czech
Follow-Up Courses
Further Comments
Study Materials
The course can also be completed outside the examination period.
The course is taught annually.
The course is taught: every week.
The course is also listed under the following terms Spring 2011 - only for the accreditation, Spring 2008, Spring 2009, Spring 2010, Spring 2011, spring 2012 - acreditation, Spring 2014, Spring 2015, Spring 2016, Spring 2017, spring 2018, Spring 2019, Spring 2020, Spring 2021, autumn 2021, Autumn 2022, Autumn 2023, Autumn 2024.
  • Enrolment Statistics (Spring 2012, recent)
  • Permalink: https://is.muni.cz/course/sci/spring2012/C8930