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| 掺铝氧化锌厚膜制备及其对三甲胺和海产品鲜度的敏感性 | |
| 引用本文： | 石蔼如,刘克强.掺铝氧化锌厚膜制备及其对三甲胺和海产品鲜度的敏感性[J].海洋与湖沼,1997,28(5):549-552. |
| 作者姓名： | 石蔼如 刘克强 |
| 作者单位： | 青岛大学物理系!青岛，266071，中国科学院海洋研究所!青岛，266071 |
| 摘 要： | 用烧结法制备掺铝氧化锌厚膜，把氧化锌粉末分别同０％，１％，３％，５％的Ａｌ２Ｏ３粉末机械研磨混合均匀，在１１００℃下烧３ｈ，再同粘合剂，有机溶剂混合制成浆料，用刮刀法在氧化铝基片上浆料制成膜，在１００℃下烘干后再经１１００℃烧结２ｈ。膜的灵敏度的测量方法是将膜放在玻璃管内加热到测量温度，测量膜暴露在一定浓度ＴＭＡ气体或由牡蛎放出的气体时电阻值的变化。测量温度为２００，２５０，３００℃和４００℃，Ｔ |
| 关 键 词： | 掺铝氧化锌厚膜 三甲胺 海产品 鲜度 敏感性 |
| 收稿时间： | 7/3/1995 12:00:00 AM |
| 修稿时间： | 7/2/1996 12:00:00 AM |
PREPARATION OF ALUIVIINUM DOPED ZINC OXIDE THICK FILMS AND THEIR SENSITIVITY TO TMA AND FRESHNESS OF SEA FOOD |
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| Shi Airu and Liu Keqiang.PREPARATION OF ALUIVIINUM DOPED ZINC OXIDE THICK FILMS AND THEIR SENSITIVITY TO TMA AND FRESHNESS OF SEA FOOD[J].Oceanologia Et Limnologia Sinica,1997,28(5):549-552. | |
| Authors: | Shi Airu and Liu Keqiang |
| Institution: | Department of Physics, Qingdao University, Qingdao 266071;Institute of Oceanology , Chinese Academy of Sciences, Qingdao 266071 |
| Abstract: | Aluminum doped zinc oxide thick films were produced using the sintering method. The powder was prepared by mechanically mixing zinc oxide with Al2O3. The various Al2O3 contents (0%, 1%, 3%, 5%, weight percent) were tested. The powder was calcined at 1100°C for 3h. The paste obtained by mixing the resulting powder with binder and organic solvent was coated on alumina substrate using a doctor blade. The thick films were dried at 100°C for 24h and sintered at 1100°C for 2h. The sensitivity of the films heated to an operating temperature in a glass tube was measured by the electrical resistance change of the films when the films were exposed to TMA gas or odor from oyster. The operating temperatures were 200, 250, 300, 350 and 400°C, respectively. The concentrations of TMA gas used were 5×10-6, 100×10-6, 150×10-6, 200×10-6 and 300×10-6, respectively. The oyster used for the experiment was stored in a fridge for l, 2 and 3 days, respectively, under a temperature of 5°C. The results show that the sensitivity increases with an increase in the amount of Al2O3. The temperature at which the films have the highest sensitivity ranges between 350 and 400°C. The sensitivity of the 5% Al2O3 doped zinc oxide thick film to the 200×10-6 concentration TMA gas at 350°C is 47. The response time is about 3 min. The response of 5% Al2O3 doped zinc oxide thick film to the lengths of cold storage time for oyster is sensitive. |
| Keywords: | Aluminum doped zinc oxide thick film Trimethylamine Freshness of sea food |
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