Electromechanical properties and charge transport of Ca3TaGa3Si2O14 (CTGS) single crystals at elevated temperatures

Electromechanical properties and charge transport of Ca3TaGa3Si2O14 (CTGS) single crystals at... Structurally ordered piezoelectric Ca3TaGa3Si2O14 (CTGS) single crystals are studied. The elastic and piezoelectric constants are determined in the temperature range from 20 °C to 900 °C by two independent approaches: resonant and pulse-echo acoustic methods. Further, the temperature dependent acoustic losses are examined. These investigations reveal two loss peaks with maxima near 68 °C and 416 °C at 4.5 MHz that are attributed to anelastic point defect relaxations. Further, the transport of oxygen is investigated using the isotope 18O as a tracer at temperatures from 1000 °C to 1200 °C. It is shown that the oxygen self-diffusion coefficients are at least three orders of magnitude lower than those of langasite, which is one reason for relatively low losses in CTGS at temperatures on the order of 1000 °C. Finally, the long-term stability of fundamental materials properties including electrical conductivity and resonance frequency is examined at 1000 °C. After one year of thermal treatment, the resonance frequency of resonators made from crystals of different sources is found to decrease only between 0.1% and 0.4%. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Solid State Ionics Elsevier

Electromechanical properties and charge transport of Ca3TaGa3Si2O14 (CTGS) single crystals at elevated temperatures

Loading next page...
 
/lp/elsevier/electromechanical-properties-and-charge-transport-of-ca3taga3si2o14-ELp5JpRuUa
Publisher
Elsevier
Copyright
Copyright © 2018 Elsevier B.V.
ISSN
0167-2738
eISSN
1872-7689
D.O.I.
10.1016/j.ssi.2018.01.032
Publisher site
See Article on Publisher Site

Abstract

Structurally ordered piezoelectric Ca3TaGa3Si2O14 (CTGS) single crystals are studied. The elastic and piezoelectric constants are determined in the temperature range from 20 °C to 900 °C by two independent approaches: resonant and pulse-echo acoustic methods. Further, the temperature dependent acoustic losses are examined. These investigations reveal two loss peaks with maxima near 68 °C and 416 °C at 4.5 MHz that are attributed to anelastic point defect relaxations. Further, the transport of oxygen is investigated using the isotope 18O as a tracer at temperatures from 1000 °C to 1200 °C. It is shown that the oxygen self-diffusion coefficients are at least three orders of magnitude lower than those of langasite, which is one reason for relatively low losses in CTGS at temperatures on the order of 1000 °C. Finally, the long-term stability of fundamental materials properties including electrical conductivity and resonance frequency is examined at 1000 °C. After one year of thermal treatment, the resonance frequency of resonators made from crystals of different sources is found to decrease only between 0.1% and 0.4%.

Journal

Solid State IonicsElsevier

Published: Apr 1, 2018

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

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

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

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.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off