Solution deposition of Pt contacts suited to proton-conducting ceramics

Evgeniy Makagon, E. Wachtel, Rotraut Merkle, Igor Lubomirsky

Research output: Contribution to journalArticle

Abstract

We have developed a simple method for depositing high quality platinum (Pt) metal contacts without the necessity of placing the substrate in vacuum or heating it above 180 °C. This method is particularly beneficial for hydrated oxide ceramics, as it prevents water loss and subsequent conductivity degradation. A mixture of two organic solvents was used: ethylene glycol monoethyl ether (EEE) and acetone. By dispersing the precursor PtCl4 in this mixed non-volatile/volatile solvent, homogeneous drying patterns were achieved. EEE was used as the reducing agent, providing a relatively slow rate of Pt deposition, and thereby avoiding formation and subsequent coagulation of Pt clusters. Drop casting of the solution (25 μL/cm2) on mirror-polished surfaces was performed at 25 °C followed by 5 min partial solvent evaporation. The substrate was then heated to 180 °C for ~30 s, resulting in the formation of a metallic Pt layer. The method was successfully tested on 5 mol% Y doped BaZrO3 and 10 mol% Gd doped ceria ceramic pellets, alumina plates, and Kapton ® polymer sheets. The in-plane sheet resistance was 30–110 Ω at room temperature after a single deposition cycle. Because of its versatility and low cost per deposition, the proposed method is very promising for a variety of substrates where high quality electrical contacts prepared at low temperature are required.

Original languageEnglish
Article number114994
JournalSolid State Ionics
Volume339
DOIs
Publication statusPublished - Oct 15 2019

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Chlorine Compounds
Barium zirconate
chlorine compounds
cerium oxides
Ethylene Glycol
Aluminum Oxide
Ceramic materials
Chlorine compounds
Acetone
Ethylene glycol
Platinum
Contacts (fluid mechanics)
Organic solvents
acetone
Protons
Ethylene
platinum
ethylene
Alumina
aluminum oxides

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Solution deposition of Pt contacts suited to proton-conducting ceramics. / Makagon, Evgeniy; Wachtel, E.; Merkle, Rotraut; Lubomirsky, Igor.

In: Solid State Ionics, Vol. 339, 114994, 15.10.2019.

Research output: Contribution to journalArticle

Makagon, Evgeniy ; Wachtel, E. ; Merkle, Rotraut ; Lubomirsky, Igor. / Solution deposition of Pt contacts suited to proton-conducting ceramics. In: Solid State Ionics. 2019 ; Vol. 339.
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