Co-firing of LNT/Ag Multilayer Sheets Prepared by Aqueous Tape Casting

J Mater Sci Technol ›› 2009, Vol. 25 ›› Issue (02): 269-272.

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Co-firing of LNT/Ag Multilayer Sheets Prepared by Aqueous Tape Casting

Shaochun Li^1,2), Qilong Zhang¹⁾ and Hui Yang ^1)†

1) Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
2) School of Civil Engineering, Qingdao Technological University, Qingdao 266033, China

Received:2007-11-19 Revised:2008-07-06 Online:2009-03-28 Published:2009-10-10
Contact: Hui YANG
Supported by:
the Key Scientific and Technological Project of Zhejiang Province, China (2006C21071)

Abstract

Abstract:

Multilayer ceramic sheets composed of Li_1.075Nb_0.625Ti_0.45O₃ (LNT) layers and silver metal layers were fabricated by aqueous tape-casting method. LNT green tape was prepared using PVA (polyvinyl alcohol) as binder and ethylene glycol as plasticizer. The influence of the slurry composition on the rheological properties of the slurries and the properties of the resultant green tapes were studied. The slurry exhibited a typical shear thinning behavior. The increase in the PVA content increased the tensile strength of the tapes. The slip compositions with 5 wt pct PVA produced green tapes with satisfactory tensile strength. Ethylene glycol additions enhanced the flexibility of the green tapes but also produced a decrease in the tensile strength. Sliver inner-electrode was pasted on LNT green tapes and the sheets were stacked, pressed and sintered at 900°C for 2 h. SEM (scanning electron microscopy) micrographs showed that the multilayer sheets were fully dense with fairly uniform microstructure and no reaction was observed between LNT and sliver layers.

Key words: Tape casting, Li_1.075Nb_0.625Ti_0.45O₃, Rheology, Lower temperature co-filed ceramics

Shaochun Li,Qilong Zhang,Hui Yang. Co-firing of LNT/Ag Multilayer Sheets Prepared by Aqueous Tape Casting[J]. J Mater Sci Technol, 2009, 25(02): 269-272.

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Co-firing of LNT/Ag Multilayer Sheets Prepared by Aqueous Tape Casting

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