机构

• 长春光学精密机械与物... [1]
• 兰州化学物理研究所 [1]

采集方式

• OAI收割 [2]

内容类型

• 会议论文 [1]
• 期刊论文 [1]

发表日期

• 2012 [1]
• 2009 [1]

学科主题

• 材料科学与物理化学 [1]

筛选

浏览/检索结果: 共2条，第1-2条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Synthesis of ordered mesoporous silicon oxycarbide monoliths via preceramic polymer nanocasting 期刊论文  OAI收割 Microporous and Mesoporous Materials, 2012, 卷号: 147, 期号: 1, 页码: 252-258 作者:  Yuan XY(袁晓燕);  Jin HL(金贺林);  Yan XB(阎兴斌);  Cheng LF(程赖飞);  Hu LT(胡丽天) 收藏  |  浏览/下载：28/0  |  提交时间：2013/07/12 SiOC ceramic  Monolith  Mesoporous  Nanocasting  Polymer-derived ceramic   Electron transport in polymer-derived amorphous silicon oxycarbonitride ceramics (EI CONFERENCE) 会议论文  OAI收割 作者:  Zhang L.;  Wang Y.;  Wang Y.;  Wang Y.;  Wang Y. 收藏  |  浏览/下载：66/0  |  提交时间：2013/03/25 The electron transport behavior of polymer-derived amorphous silicon oxycarbonitride ceramics is studied by measuring their temperature-dependent electrical conductivities. The experimental results are analyzed using theoretical models. The results reveal that the materials exhibit three conduction mechanisms: conduction in extended states  conduction in band tails  and conduction in localized states. Particularly  it is found that in a low-temperature regime  the conduction of the materials follows a band tail hopping mechanism  rather than the previously assumed variable range hopping mechanism. The results also reveal that energy gaps such as EC-E F and EC-EA decrease with increasing pyrolysis temperature. 2009 The American Ceramic Society.