Study on deposition technique and properties of Pd-Ag alloy membrane supported on microporous ceramics substrate

Citation
Hy. Wang et al., Study on deposition technique and properties of Pd-Ag alloy membrane supported on microporous ceramics substrate, ACT CHIM S, 59(3), 2001, pp. 388-393
Citations number
11
Language
CHINESE
art.tipo
Article
Categorie Soggetti
Chemistry
Journal title
ACTA CHIMICA SINICA
ISSN journal
0567-7351 → ACNP
Volume
59
Issue
3
Year of publication
2001
Pages
388 - 393
Database
ISI
SICI code
0567-7351(2001)59:3<388:SODTAP>2.0.ZU;2-1
Abstract
Deposition technique of Pd - Ag alloy membrane on porous ceramics substrate with paste coating and electroless - plating was studied. in paste coating process, palladium and silver compounds were added into a sticky organic p aste with a controlled ratio to form a coating paste. The coating paste was coated on an asymmetrical composite ceramics substrate by brush coating me thod. The paste was then dried and calcinated to give a porous Pd - Ag allo y membrane. This membrane was electroless - plated to deposit a porous - fr ee Pd Ag alloy membrane, with a thickness of about 3 mum and an Ag content of 23 % (atom percent). The flux of HZ permeation of this Pd - Ag alloy mem brane was 45 cm(3)(STP)cm(-2)min(-1) at 0.1 MPa and 300 degreesC. Separatio n factor of H-2/He could be higher than 500. The results of the experiment show that Ag transmitted to the membrane surface during the heat treatment, and the Ag contents became constant at a given treatment temperature. The preferred treatment temperature was 700 degreesC.