Water-induced degradation in 0.91Pb(Zn1/3Nb2/3)O3–0.09PbTiO3 single crystals

Abstract

Water-induced degradation in 0.91Pb(Zn1/3Nb2/3)O3–0.09PbTiO3 (PZN–PT) single crystals was studied through an electrochemical hydrogen charging process, in which silver electrodes were fired onto the single crystals and hydrogen was deposited on the electrodes via electrolysis of water in 0.01 M NaOH solution. The degradation was characterized by dramatic increases in the leakage current and in the dielectric loss of the crystals. X-ray diffraction analysis showed that the crystals were decomposed into metallic lead, zinc, and a niobium-rich face-centered-cubic phase. Water-induced degradation limits the application of PZN–PT single crystals.

Hydrogen-induced degradation in CaCu3Ti4O12 ceramics

“…As we proposed in some previous researches [8,10], hydrogen atoms deposited on silver electrodes may diffuse into ceramics and react with them at room-temperature, though most of them combine with one another and form hydrogen molecules. The properties of the ceramics are usually greatly changed by the reaction of hydrogen, the same as the properties of the CCTO ceramics in this study.…”

“…The properties of the ceramics are usually greatly changed by the reaction of hydrogen, the same as the properties of the CCTO ceramics in this study. The reactions between oxides and hydrogen through electrochemical hydrogen charging can be classified into two categories: either the lattices of the oxides are decomposed after the reaction [8], or no gross structural change occurs in the lattices of the oxides with hydrogen incorporated in them [10]. Fig.…”

“…Several origins have been recognized for the degradation, among which an important one is the ambient-temperature reaction of hydrogen from the electrolysis of water. This degradation process is quite common since electroceramic components and devices always operate under some voltages while moisture is ubiquitous in the environment [8,9]. Presently, we have studied the ambient-temperature reaction of hydrogen with CCTO ceramics.…”

Great diversity in stability of perovskite-type oxides studied by electrochemical hydrogen charging

“…X-ray diffraction indicates that the perovskite-type The following reactions had been proposed [7] :…”

Hydrogen-Induced Degradation and Aging of Pb(Mg1/3Nb2/3)O3-Based X7R Multilayer Ceramic Capacitors

“…A quick decomposition of Pb(Zn 1=3 Nb 2=3 )O 3 -PbTiO 3 single crystals induced by electrochemical hydrogen charging had been found and reported in a previous paper. 5) It should be pointed out that Pb(Mg 1=3 Nb 2=3 )O 3 -PbTiO 3 single crystals had also been treated through electrochemical hydrogen charging while no similar decomposition occurred. The lattice of Pb(Mg 1=3 Nb 2=3 )O 3 -PbTiO 3 single crystals remained unchanged after hundreds of hours of electrochemical hydrogen charging.…”