| Co掺杂比例对ZnO热致变色变发射率性能的影响 | |
| Influences of Co2+ Doping Ratio on the Thermochromic and Variable Emissivity Properties of ZnO | |
| 摘要: 利用固相烧结法制备了不同Co2+掺杂比例的ZnO，研究了Co2+掺杂比例对ZnO微观结构形貌，从而对变色变发射率性能的影响。结果表明，Co2+掺杂会取代ZnO中部分的Zn2+，但不改变ZnO的六方纤锌矿结构。掺杂比例达到7.5%和10%时，会形成杂相Co3O4。随着掺杂比例逐渐增加，ZnO的结晶质量下降、禁带宽度减小、而晶粒形貌尺寸基本不变。Co2+掺杂ZnO在室温下都呈绿色，随掺杂比例增加颜色先变深后变浅。当温度从室温升高到700℃，所有样品可变为黄褐色同时发射率逐渐提高。并且，随掺杂比例增加，颜色变化更为明显，发射率变化值增大。 | |
| 关键词: 氧化锌 固相烧结法 热致变色 变发射率 | |
| 基金项目: 南航引进人才启动基金（No.YAH18001）资助项目 | |
| Abstract: The ZnO powders doped by different ratios of Co2+ ions were synthesized via solid-state reaction. The effects of Co2+ doping ratio on microstructure and morphology, and thus on thermochromic and variable emissivity properties of ZnO were studied in detail. The results show that Co2+ ions would substitute for part of the Zn2+ ions in ZnO, and it does not change wurtzite(hexagonal) zincite crystal structure of the ZnO. While when doping ratio reaches 7.5% and 10%, impurity phase Co3O4 would form in the samples. The crystal quality and forbidden bandwidth of ZnO decreases gradually while morphology and grain size of ZnO barely change with doping ratio of Co2+ ions increasing. The Co2+ doped ZnO powders are green at room temperature, which gets deep initially and then becomes shallow with Co2+ content increasing. When the testing temperature improves from room temperature to 700℃, all the samples could turn into tawny color and the emissivity increases simultaneously. And the color change is more obvious and the change value in emissivity increases with enhancement of Co2+ doping ratio. | |
| Keywords: zinc oxide solid-state reaction thermochromic variable infrared emissivity | |
| 投稿时间：2018-04-25 修订日期：2018-06-12 | |
| 摘要点击次数: 1703 | |
| 全文下载次数: 701 | |
| 徐晨,方罡,刘初阳,徐国跃,朱永梅,张艳婷.Co掺杂比例对ZnO热致变色变发射率性能的影响[J].无机化学学报,2018,34(9):1625-1631. | |
| 查看全文 查看/发表评论 下载PDF阅读器 | |
| Support information: | |
|
| |
|
| |
|
| |