Cavity resonator for dielectric measurements of high-ε, low loss materials, demonstrated with barium strontium zirconium titanate ceramics

Quinn R Marksteiner; Michael B Treiman; Ching-Fong Chen; William B Haynes; M T Reiten; Dale Dalmas; Elias Pulliam

doi:10.1063/1.4984269

Cavity resonator for dielectric measurements of high-ε, low loss materials, demonstrated with barium strontium zirconium titanate ceramics

Rev Sci Instrum. 2017 Jun;88(6):064704. doi: 10.1063/1.4984269.

Authors

Quinn R Marksteiner¹, Michael B Treiman², Ching-Fong Chen³, William B Haynes¹, M T Reiten⁴, Dale Dalmas¹, Elias Pulliam¹

Affiliations

¹ Los Alamos National Laboratory, AOT Division, P.O. Box 1663, Los Alamos, New Mexico 87545, USA.
² CapTel, 450 Science Drive, Madison, Wisconsin 53711, USA.
³ Los Alamos National Laboratory, SIGMA Division, P.O. Box 1663, Los Alamos, New Mexico 87545, USA.
⁴ Los Alamos National Laboratory, Q6, P.O. Box 1663, Los Alamos, New Mexico 87545, USA.

PMID: 28667944
DOI: 10.1063/1.4984269

Abstract

A resonant cavity method is presented which can measure loss tangents and dielectric constants for materials with dielectric constant from 150 to 10 000 and above. This practical and accurate technique is demonstrated by measuring barium strontium zirconium titanate bulk ferroelectric ceramic blocks. Above the Curie temperature, in the paraelectric state, barium strontium zirconium titanate has a sufficiently low loss that a series of resonant modes are supported in the cavity. At each mode frequency, the dielectric constant and loss tangent are obtained. The results are consistent with low frequency measurements and computer simulations. A quick method of analyzing the raw data using the 2D static electromagnetic modeling code SuperFish and an estimate of uncertainties are presented.