Table 2 The mean thermal expansion coefficients of PbTiO3-based perovskite achieved by chemical and pressure-tuned routes. The values at 0.3 GPa and 0.8 GPa are calculated from the interpolation of experimental data in Figure 3
Figure 3
figure 3

(a) A Evolution of lattice parameters a and c of tetragonal PbTiO3 with increasing pressure at 300 K, 480 K, 580 K and 730 K. (3b), tetragonality (c/a) of PbTiO3 as functions of temperature and pressure. The solid lines are drawn from linear fitting and the determined pressure derivatives, d(c/a)/dP, are −0.013(2)/GPa, −0.0057(15)/GPa, −0.0039(16)/GPa and −0.00048(107)/GPa for 300 K, 480 K, 580 K and 730 K, respectively.

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From: Pressure-induced reversal between thermal contraction and expansion in ferroelectric PbTiO3

Compounds

CTE (°C−1)

Temperature range

PbTiO3, ambient pressure, Ref. 15

−1.99×10−5

RT-763 K

PbTiO3 (0.3 GPa), this work

0.47×10−5

RT-600 K

PbTiO3 (0.8 GPa), this work

0.31×10−5

400–700 K

0.7PT-0.3BZT, Ref. 13

−0.60×10−5

RT-773 K

0.6PT-0.3BZT-0.1BF, Ref. 13

−0.31×10−5

RT-773 K

Fe[Co(CN)6], Ref. 2

−0.44×10−5

RT-773 K

(1-x)PbTiO3-xBi(Ni1/2Ti1/2)O3, Ref. 14

−0.88×10−5 (x = 0.1)

RT-798 K (x = 0.1)

 

0.12×10−5 (x = 0.2)

RT-798 K (x = 0.2)

 

0.85×10−5 (x = 0.3)

RT-723 K (x = 0.3)

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