Characterization of Plasmachemical Treatment of Archaeological
Artifacts

D 2001

Characterization of Plasmachemical Treatment of Archaeological Artifacts

KRČMA, František, Zuzana RAŠKOVÁ, Miloš KLÍMA and Jaroslav KOUSAL

Basic information

Original name

Characterization of Plasmachemical Treatment of Archaeological Artifacts

Name in Czech

Charakterizace plazmochemických úprav archeologických artefaktů

Authors

KRČMA, František (203 Czech Republic), Zuzana RAŠKOVÁ (203 Czech Republic), Miloš KLÍMA (203 Czech Republic, guarantor) and Jaroslav KOUSAL (203 Czech Republic)

Edition

Kerkrade, Proceedings of Frontiers in Low Temperature Plasma Diagnostics IV, p. 108-111, 4 pp. 2001

Publisher

neuveden

Other information

Language

English

Type of outcome

Stať ve sborníku

Field of Study

20506 Coating and films

Country of publisher

Netherlands

Confidentiality degree

není předmětem státního či obchodního tajemství

RIV identification code

RIV/00216224:14310/01:00021140

Organization unit

Faculty of Science

Keywords in English

plasma treatment; archaeological artifacts

Abstract

ORIG CZ

V originále

Plasmachemical treatment of archaeological artefacts is a relatively new technique. Up to now, it has been used more or less intuitively in practice, but for a widespread application an exact characterization of the process is necessary. The process is based on using low-pressure hydrogen plasma in which the artefacts are treated for several hours, usually in more steps. The problem is how long period of the plasmatic treatment is optimal and how to characterize its efficiency. From the kinetic point of view, the oxide and chloride molecules reduction is the main process. Significant, but not very intense radiation of the OH radical was observed in the optical emission spectra. We have measured the emission spectra in the range of 300 350 nm during the treatment of some metallic artefacts, such as silver coins and some pieces of iron. The OH radiation shows specific dependence on time (initially a fast increase, later a slower non-exponential decrease). Due to the fact that in pure hydrogen plasma the OH 0 sequence is not overlapped by any other radiation we tried to use its integral intensity in the range of 300 330 nm as a marker of the oxides reduction effectiveness. The measuring device used for our experiments could be used in practice for plasmachemical treatment monitoring.

In Czech

Charakterizace plazmochemických úprav archeologických artefaktů

Links

MSM 143100003, plan (intention)

Name: Studium plazmochemických reakcí v neizotermickém nízkoteplotním plazmatu a jeho interakcí s povrchem pevných látek

Investor: Ministry of Education, Youth and Sports of the CR, Study of plasmachemical reactions in non-isothermic low pressure plasma and its interaction with the surface of solid substrates

Citovat

KRČMA, František, Zuzana RAŠKOVÁ, Miloš KLÍMA and Jaroslav KOUSAL. Characterization of Plasmachemical Treatment of Archaeological Artifacts. In Proceedings of Frontiers in Low Temperature Plasma Diagnostics IV. Kerkrade: neuveden, 2001, p. 108-111.

@inproceedings{390751,
   author = {Krčma, František and Rašková, Zuzana and Klíma, Miloš and Kousal, Jaroslav},
   address = {Kerkrade},
   booktitle = {Proceedings of Frontiers in Low Temperature Plasma Diagnostics IV},
   keywords = {plasma treatment; archaeological artifacts},
   language = {eng},
   location = {Kerkrade},
   pages = {108-111},
   publisher = {neuveden},
   title = {Characterization of Plasmachemical Treatment of Archaeological Artifacts},
   year = {2001}
}

TY  - JOUR
ID  - 390751
AU  - Krčma, František - Rašková, Zuzana - Klíma, Miloš - Kousal, Jaroslav
PY  - 2001
TI  - Characterization of Plasmachemical Treatment of Archaeological Artifacts
PB  - neuveden
CY  - Kerkrade
KW  - plasma treatment
KW  - archaeological artifacts
N2  - Plasmachemical treatment of archaeological artefacts is a relatively new technique. Up to now, it has been used more or less intuitively in practice, but for a widespread application an exact characterization of the process is necessary. The process is based on using low-pressure hydrogen plasma in which the artefacts are treated for several hours, usually in more steps. The problem is how long period of the plasmatic treatment is optimal and how to characterize its efficiency. From the kinetic point of view, the oxide and chloride molecules reduction is the main process. Significant, but not very intense radiation of the OH radical was observed in the optical emission spectra. We have measured the emission spectra in the range of 300 350 nm during the treatment of some metallic artefacts, such as silver coins and some pieces of iron. The OH radiation shows specific dependence on time (initially a fast increase, later a slower non-exponential decrease). Due to the fact that in pure hydrogen plasma the OH 0 sequence is not overlapped by any other radiation we tried to use its integral intensity in the range of 300 330 nm as a marker of the oxides reduction effectiveness. The measuring device used for our experiments could be used in practice for plasmachemical treatment monitoring.
ER  -

KRČMA, František, Zuzana RAŠKOVÁ, Miloš KLÍMA and Jaroslav KOUSAL. Characterization of Plasmachemical Treatment of Archaeological Artifacts. In \textit{Proceedings of Frontiers in Low Temperature Plasma Diagnostics IV}. Kerkrade: neuveden, 2001, p.~108-111.

Detailed Information on Publication Record