| 학회 |
한국화학공학회 |
| 학술대회 |
2007년 봄 (04/19 ~ 04/20, 울산 롯데호텔) |
| 권호 |
13권 1호, p.997 |
| 발표분야 |
재료 |
| 제목 |
Large-scale synthesis of ZnO micro-balls composed of thin nanosheets via sol-gel method |
| 초록 |
The semiconductor ZnO is an important inorganic material which has various applications in ceramics, catalyst, rubber, cosmetics, varistors with a direct wide band gap (3.37eV) and high exciton binding energy (60 MeV) at room-temperature, presenting itself as a promising material for the wide range of well-know technological as well as an important functional material for the future research and applications. In this connection we synthesized zinc oxide micro-balls at around ~70°C temperature by the sol-gel method using zinc nitrate hexa-hydrate and sodium hydroxide. Morphological observations were carried out by Field Emission Scanning Electron Microscopy (FESEM).The transmission electron microscopy also consisted with the FESEM data and it reveals that the micro balls are arranged with several hundreds sheets of zinc oxide. As grown sample composition was analyzed by the FTIR spectra. It shows a characteristic peak of zinc oxide at 523 cm-1. The X-ray diffraction patterns indexed as the hexagonal zinc oxide with lattice constants a=3.249 and c=5.206Å, well matched with the available Joint Committee on Powder Diffraction Standards (JCPDS 36-1451). |
| 저자 |
Rizwan Wahab, S. G. Ansari, 김영순, 서형기, 신형식
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| 소속 |
전북대 |
| 키워드 |
micro-balls; varistors
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| E-Mail |
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| 원문파일 |
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