Influence of Bi_2O_3 Impurities in Ceramic ZnO on Photoacoustic Spectra
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概要
- 論文の詳細を見る
Photoacoustic (PA) spectroscopy is applied to study the optical absorption of ceramic ZnO doped with 1 mol% Bi_2O_3 sintered at different temperatures (700-1100℃). PA signal intensities plotted semilogarithmically reveal two individual regions below 3.0 eV (A: 3.0-2.7 eV; B: 2.6-2.4 eV). The steepness factor (slope of exponential optical absorption) obtained at region A decreases with increasing sintering temperature, indicating an increase of Bi_2O_3 segregation at particle surfaces and grain boundaries. The steepness factor at region B increases rapidly with increasing sintering temperature, indicating an occurrence of structure ordering (decrease of defect states) by the Bi_2O_3 liquid phase sintering effect.
- 社団法人応用物理学会の論文
- 1997-12-15
著者
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Toyoda Taro
Department Of Applied Physics And Chemistry The University Of Electro-communications
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Shimamoto S
Univ. Electro‐communications Tokyo Jpn
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Shimamoto Satoshi
Department Of Applied Physics And Chemistry The University Of Electro-communications
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