18.6: Examples
- Page ID
- 8288
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Like other dielectric materials, the predominant pyroelectric structure is the perovskite.
Two examples are:
0.75Pb(Mg1/3-Nb2/3)O3-0.25PbTiO3, which has a pyroelectric coefficient of −1300 μC m−2 K−1 as a single crystal.
It is more commonly referred to as PMN-PT.
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https://www.doitpoms.ac.uk/tlplib/py...ite-PbNbO3.mp4 Rotating crystal structure of PbMg/NbO3 |
and
Ba0.65Sr0.35TiO3, which has a pyroelectric coefficient of −7570 μC m−2 K−1.
It is also known as BST.
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https://www.doitpoms.ac.uk/tlplib/py...e-BaSrTiO3.mp4 Rotating crystal structure of Ba/SrTiO3 |
However, there are other types of pyroelectric material which do not have a perovskite structure. Two of the more common of these will also be considered.