TY - JOUR
T1 - Mechanisms of incipient chemical reaction between Ca(OH)2 and SiO2 under moderate mechanical stressing II
T2 - Examination of a radical mechanism by an EPR study
AU - Watanabe, Tomoyuki
AU - Isobe, Tetsuhiko
AU - Senna, Mamoru
PY - 1996/3
Y1 - 1996/3
N2 - An EPR spectroscopy was examined in detail in order to elucidate the role of mechanically induced radicals on the incipient mechanochemical reaction between Ca(OH)2 and SiO2. The specific radical species found on separately milled Ca(OH)2 and SiO2 disappeared in the case of mixed milling. O- radicals on Ca(OH)2 and E′centers on the SiO2 surface reacted during milling, leading to a precursor of complex oxide with Si-O-Ca bonding. Relative contribution of radical mechanism was compared with those of electron pairs to the complex formation of Si-O-Ca under mechanical stressing.
AB - An EPR spectroscopy was examined in detail in order to elucidate the role of mechanically induced radicals on the incipient mechanochemical reaction between Ca(OH)2 and SiO2. The specific radical species found on separately milled Ca(OH)2 and SiO2 disappeared in the case of mixed milling. O- radicals on Ca(OH)2 and E′centers on the SiO2 surface reacted during milling, leading to a precursor of complex oxide with Si-O-Ca bonding. Relative contribution of radical mechanism was compared with those of electron pairs to the complex formation of Si-O-Ca under mechanical stressing.
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U2 - 10.1006/jssc.1996.0115
DO - 10.1006/jssc.1996.0115
M3 - Article
AN - SCOPUS:0000550326
VL - 122
SP - 291
EP - 296
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
SN - 0022-4596
IS - 2
ER -