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Electron spin resonance and its application to heat treated carbonaceous materials; A ressonancia de spin eletronico e sua aplicacao aos materiais carbonosos tratados termicamente

Miscellaneous:

Abstract

This work presents the basic characteristics of the electron spin resonance technique, also called paramagnetic resonance, being discussed its application to heat treated carbonaceous materials. In the low heat treatment temperature (HTT) range (below 700 deg C) the organic free radical are the predominant unpaired spin center, which play a key role in the process of carbonization and meso phase formation. At higher temperatures, it is possible to make correlations between the low H T T range and the high HTT range (above 130 deg C), where the predominant unpaired spin center are the free charge carriers (free electrons) of the graphite like crystallites of the material, which are formed by the carbonization process. (author) 10 refs., 3 figs.
Authors:
Emmerich, Francisco Guilherme [1] 
  1. Espirito Santo Univ., Vitoria, ES (Brazil). Laboratorio de Materiais Carbonosos e Plasma Termico
Publication Date:
Dec 31, 1993
Product Type:
Miscellaneous
Report Number:
CONF-9310477-
Reference Number:
SCA: 665100; PA: AIX-30:003912; EDB-99:027443; SN: 99002061377
Resource Relation:
Conference: 10. seminar on chemical control in metallurgy and 6. meeting on carbon chemistry, 10. Seminario de controle quimico em metalurgia. 6. Seminario de carboquimica, Campinas (Brazil), 4-7 Oct 1993; Other Information: DN: 10 refs., 3 figs.; PBD: 1993
Subject:
66 PHYSICS; CARBONACEOUS MATERIALS; ELECTRON SPIN RESONANCE; HEAT TREATMENTS; MAGNETIC RESONANCE; STRUCTURAL CHEMICAL ANALYSIS
OSTI ID:
310042
Research Organizations:
Associacao Brasileira de Metalurgia e Materiais, Sao Paulo, SP (Brazil)
Country of Origin:
Brazil
Language:
Portuguese
Other Identifying Numbers:
TRN: BR99I0913003912
Availability:
Available from the library of the Brazilian Nuclear Energy Commission, Rio de Janeiro
Submitting Site:
BRN
Size:
16 p.
Announcement Date:

Miscellaneous:

Citation Formats

Emmerich, Francisco Guilherme. Electron spin resonance and its application to heat treated carbonaceous materials; A ressonancia de spin eletronico e sua aplicacao aos materiais carbonosos tratados termicamente. Brazil: N. p., 1993. Web.
Emmerich, Francisco Guilherme. Electron spin resonance and its application to heat treated carbonaceous materials; A ressonancia de spin eletronico e sua aplicacao aos materiais carbonosos tratados termicamente. Brazil.
Emmerich, Francisco Guilherme. 1993. "Electron spin resonance and its application to heat treated carbonaceous materials; A ressonancia de spin eletronico e sua aplicacao aos materiais carbonosos tratados termicamente." Brazil.
@misc{etde_310042,
title = {Electron spin resonance and its application to heat treated carbonaceous materials; A ressonancia de spin eletronico e sua aplicacao aos materiais carbonosos tratados termicamente}
author = {Emmerich, Francisco Guilherme}
abstractNote = {This work presents the basic characteristics of the electron spin resonance technique, also called paramagnetic resonance, being discussed its application to heat treated carbonaceous materials. In the low heat treatment temperature (HTT) range (below 700 deg C) the organic free radical are the predominant unpaired spin center, which play a key role in the process of carbonization and meso phase formation. At higher temperatures, it is possible to make correlations between the low H T T range and the high HTT range (above 130 deg C), where the predominant unpaired spin center are the free charge carriers (free electrons) of the graphite like crystallites of the material, which are formed by the carbonization process. (author) 10 refs., 3 figs.}
place = {Brazil}
year = {1993}
month = {Dec}
}