The current study investigates the influence of adding excess Na on the structure and conductivity of Na0.5Bi0.5TiO3. Polycrystalline bulk samples were prepared via conventional solid-state reaction method. XRD confirmed the presence of rhombohedral perovskite as a primary phase in all the samples. SEM revealed the existence of secondary phases which were found to increase considerably with the higher addition of excess Na. Chemical analysis via EDXS indicates Na deficiency in the sintered sample of stoichiometric Na0.5Bi0.5TiO3, while the average Na/Bi molar ratio found to be more than unity in all the Na-excess compositions. Impedance spectroscopy studies showed at least 3 orders of magnitude conductivity difference between the Na-excess and pure Na0.5Bi0.5TiO3 samples. The bulk conductivity was found to increase with the addition of excess Na, which was attributed to the increase in oxygen vacancy. Although partial substitution of Na for A-site Bi appears to be a promising strategy for the conductivity enhancement, these compositions show significant segregation of secondary phases on excess Na addition.
Solid State Ionics – Elsevier
Published: Apr 1, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera