Characterization of palladium and palladium-silver alloy layers on stainless steel support
Characterization of palladium and palladium-silver alloy layers on stainless steel support
复制标题
不锈钢载体上钯和钯银合金层的表征
DOI：
10.1142/s0217979206040507
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发表时间：
2006
影响因子：
1.7
通讯作者：
T. Tomida
中科院分区：
文献类型：
--
作者：
M. Katoh;Akira Sondoh;T. Horikawa;T. Tomida
采用化学镀技术在不锈钢载体上制备了Pd和Pd/Ag复合镀层。为了形成Pd/Ag层，先在活性不锈钢(SS)上镀Pd层，然后再镀银。Pd/Ag-SS片状复合材料在873K-973K下，在氦气中进行10h-12h的热处理。退火前，Pd/Ag-SS复合材料表面的Pd层厚度为7.6μm，Ag层厚度为1.9μm。在氦气中873K保温12h后，在不锈钢板材上观察到了Pd/Ag合金的形成。XRF测试结果表明，Ag/(Pd+Ag)比表面为0.28，XPS测试结果为0.29。结果表明，在该条件下，在不锈钢板材上形成了均匀的Pd/Ag合金。氦的渗透率是在压力差为1atm和室温下测量的。无Pd层和78μm Pd层的多孔不锈钢管的渗透系数分别为100m~3/m~2·h和0.35m~3/m~2·h。结果表明，制得的膜为几乎致密的膜。
Pd and Pd/Ag layers were prepared by a technique of electroless plating on stainless steel supports. To form Pd/Ag layers, Pd layer was plated on an activated stainless steel (SS) sheet followed by Ag plating. The Pd/Ag-SS sheet composite was annealed at 873 K-973 K for 10 h -12 h in helium. Before annealing, the thickness of Pd layer and Ag layer on Pd/Ag-SS sheet composite was 7.6 μm and 1.9 μm, respectively. The formation of Pd/Ag alloy was observed on the SS sheet after annealing at 873 K for 12 h in helium. The ratios of Ag/(Pd+Ag) were 0.28 on the surface by XRF and 0.29 in the bulk by XPS. This result showed the formation of homogeneous Pd/Ag alloy on the SS sheet at that annealing condition. Helium permeances were measured at a pressure difference of 1 atm and room temperature. The permeances of porous stainless steel (PSS) tubes without and with 78 μm Pd layer were 100 m3/m2h and 0.35 m3/m2h, respectively. This result showed the obtained membrane was an almost dense membrane.