Systematic and Controllable Negative, Zero, and Positive
Thermal Expansion in Cubic Zr<sub>1–<i>x</i></sub>Sn<sub><i>x</i></sub>Mo<sub>2</sub>O<sub>8</sub>
- Publication date
- Publisher
Abstract
We
describe the synthesis and characterization of a family of materials,
Zr<sub>1–<i>x</i></sub>Sn<sub><i>x</i></sub>Mo<sub>2</sub>O<sub>8</sub> (0 < <i>x</i> < 1), whose
isotropic thermal expansion coefficient can be systematically varied
from negative to zero to positive values. These materials allow tunable
expansion in a single phase as opposed to using a composite system.
Linear thermal expansion coefficients, α<sub>l</sub>, ranging
from −7.9(2) × 10<sup>–6</sup> to +5.9(2) ×
10<sup>–6</sup> K<sup>–1</sup> (12–500 K) can
be achieved across the series; contraction and expansion limits are
of the same order of magnitude as the expansion of typical ceramics.
We also report the various structures and thermal expansion of “cubic”
SnMo<sub>2</sub>O<sub>8</sub>, and we use time- and temperature-dependent
diffraction studies to describe a series of phase transitions between
different ordered and disordered states of this material