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| DUPLICATION OF GLASSY BLACK SnO_2 FILM ON BRONZE AND ITS PROTECTIVE EFFECT |
| JIN Tao WANG Changsui CHEN Zhiwen LI Fanqing (Structure Research Laboratory; USTC; Hefei 230026 ) |
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Abstract The glassy black surface coating on many ancient chinese bronze mirrors was found to be mainly composed of nanometer-sized particles of SnO2. The nanometer SnO2 film was duplicated on bronze substrate by an improved sol-gel method. XRD showed that the duplicated film also mainly consisted of nanometer SnO2. The protective effect of the film so prepared and the coating of ancient black mirror was tested by acidic solution containing Cl-. SEM observation of central and edge regions on the prepared sample and the original glassy coating on ancient mirror indicated that the duplication treatment was successful and that the protective effect was dependent on the film density.
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Received: 25 April 1997
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