由于矿物燃料的广泛使用,空气中含硫物质逐年积累,电子产品及元器件出现硫化失效的情况越来越多,电子产品与元器件的抗硫化能力提升越来越受到重视。通过质量一致性提升、增加电极保护层和采用高钯内电极浆料3种方案,提升电阻器产品的...由于矿物燃料的广泛使用,空气中含硫物质逐年积累,电子产品及元器件出现硫化失效的情况越来越多,电子产品与元器件的抗硫化能力提升越来越受到重视。通过质量一致性提升、增加电极保护层和采用高钯内电极浆料3种方案,提升电阻器产品的抗硫化能力,并采用ASTM B 809—95标准进行了抗硫化效果对比验证。采用对比验证,研究了3种片式膜固定电阻器抗硫化性能的提升方案,验证了抗硫化效果存在以下梯度:高钯内电极银浆料>增加电极保护层>质量一致性提升。因此,在实际的应用中可根据具体的应用场景来选择合适的抗硫化能力提升方案。展开更多
Conventional Pd/γ-A12O3 methane sensors are easily poisoned in a sulfur-containing atmosphere, with a subsequent decrease in sensitivity and the working life of methane sensors. We mainly investigated the effect of n...Conventional Pd/γ-A12O3 methane sensors are easily poisoned in a sulfur-containing atmosphere, with a subsequent decrease in sensitivity and the working life of methane sensors. We mainly investigated the effect of nanotechnology and a cerium co-catalyst on the stability and anti-sulfur performance of methane sensors. In our experiment, an anti-sulfur methane sensor was prepared by immersing cerium-containing γ-alumina nanometer elements into a Pt-Pd bimetallic nanometer catalyst. The experi- ment about the sensitivity and stability performance of different catalytic methane sensors indicate that sensitivity, decreased by catalyst sulfur poisoning, is improved significantly by adding cerium to the vector. As well, the long-term operational stability of methane sensors increased significantly.展开更多
文摘由于矿物燃料的广泛使用,空气中含硫物质逐年积累,电子产品及元器件出现硫化失效的情况越来越多,电子产品与元器件的抗硫化能力提升越来越受到重视。通过质量一致性提升、增加电极保护层和采用高钯内电极浆料3种方案,提升电阻器产品的抗硫化能力,并采用ASTM B 809—95标准进行了抗硫化效果对比验证。采用对比验证,研究了3种片式膜固定电阻器抗硫化性能的提升方案,验证了抗硫化效果存在以下梯度:高钯内电极银浆料>增加电极保护层>质量一致性提升。因此,在实际的应用中可根据具体的应用场景来选择合适的抗硫化能力提升方案。
基金support for this work, provided by the National Natural Science Foundation of China (No60910005)
文摘Conventional Pd/γ-A12O3 methane sensors are easily poisoned in a sulfur-containing atmosphere, with a subsequent decrease in sensitivity and the working life of methane sensors. We mainly investigated the effect of nanotechnology and a cerium co-catalyst on the stability and anti-sulfur performance of methane sensors. In our experiment, an anti-sulfur methane sensor was prepared by immersing cerium-containing γ-alumina nanometer elements into a Pt-Pd bimetallic nanometer catalyst. The experi- ment about the sensitivity and stability performance of different catalytic methane sensors indicate that sensitivity, decreased by catalyst sulfur poisoning, is improved significantly by adding cerium to the vector. As well, the long-term operational stability of methane sensors increased significantly.
