4 research outputs found
Systematic and Controllable Negative, Zero, and Positive Thermal Expansion in Cubic Zr1âxSnxMo2O8
We describe the synthesis and characterization of a family of materials, Zr1âxSnxMo2O8 (0 < x < 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, αl, ranging from â7.9(2) Ă 10â6 to +5.9(2) Ă 10â6 Kâ1 (12â500 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 âcubicâ SnMo2O8, 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
Systematic and Controllable Negative, Zero, and Positive Thermal Expansion in Cubic Zr 1â x
Systematic and Controllable Negative, Zero, and Positive Thermal Expansion in Cubic Zr<sub>1â<i>x</i></sub>Sn<sub><i>x</i></sub>Mo<sub>2</sub>O<sub>8</sub>
We
describe the synthesis and characterization of a family of materials,
Zr<sub>1â<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 â7.9(2) Ă 10<sup>â6</sup> to +5.9(2) Ă
10<sup>â6</sup> K<sup>â1</sup> (12â500 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 âcubicâ
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