Highly sensitive porous metal oxide films for early detection of electrical fire: Surface modification and high throughput screening

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• 作者：Ye Zhao ; Shunping Zhang ; Guozhu Zhang ; Xiaoshuang Deng ; Changsheng Xie
• 关键词：Electrical fire ; Modified WO3 ; Modified In2O3 ; Sensitivity ; High throughput screening
• 刊名：Sensors and Actuators B: Chemical
• 出版年：February, 2014
• 年：2014
• 卷：191
• 期：Complete
• 页码：431-437
• 全文大小：1987 K

文摘

In this study, an electrical fire simulator was fabricated and connected to a test platform which can take high throughput screening of materials through the method of combinatorial material science. WO₃ and In₂O₃ were used as basis materials in the experiment and modified through the way of micro-injection in order to find the best one sensitive to electrical fire. It is found that CrCl₃-modified and MgCl₂-modified WO₃, as well as LaOCl-modified and SmOCl-modified In₂O₃ show the best sensing performance. They can be used as sensitive materials for early detection of electrical fire because they have good sensitivity to the smell of PVC even if the working temperature of PVC insulated wires is lower than 200 掳C. Therefore, it confirms that the early detection of electrical fire in the invisible smoke stage is feasible by using the modified WO₃ or In₂O₃.