We design a new composition to establish rhombohedral and tetragonal phase coexistence in alkali niobate ceramics. The composition of (1−x)[0.94(K0.48Na0.52)NbO3–0.045Bi0.5Na0.5ZrO3−0.015CaTiO3]–xLi0.2Na0.8NbO3 has been synthesized by conventional solid-state reaction method. XRD patterns and curves of permittivity versus temperature show that the phase of this kind of perovskite structure ceramics convert tetragonal phase (x ≤ 0.4) into rhombohedral phase (x ≥ 0.5), and the rhombohedral and tetragonal (R-T) phases coexistence has been confirmed at x = 0.425 ~ 0.475. Around this phase boundary, the ceramics with x = 0.425 show an optimum piezoelectric properties (d 33 ~ 178 pC/N and k p ~ 38.5%) with high T C ~ 400 °C. Moreover, the ceramics exhibited strong temperature stability. This work exhibits obviously different piezoelectric properties from other R-T coexistence systems in KNN-based ceramics, the underlying physical mechanism has been discussed. It is believed that this method could promote the further development of alkali niobate ceramics.
Journal of Materials Science: Materials in Electronics – Springer Journals
Published: May 25, 2017
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