Thermal conductivity of ferroelectric nanoregions and the exploration of morphotropic phase boundary through high-pressure synthesis

虽然弛豫铁电体以其特殊的压电特性而闻名，但在这些材料中发现的纳米级相分离现象尚未得到很好的理解。对典型弛豫铁电体（1-x）Pb(Mg_<1/3>Nb_<2/3>)O_3-xPbTiO_3和（1-x）Pb(Zn_<1/3>Nb_<2/3>)O_3-xPbTiO_3的比热和热导率测量表明，随着铁电区尺寸从纳米尺度向宏观尺度的增长，其热性质由玻璃状转变为晶体状。

Although relaxor ferroelectrics are known for their exceptional piezoelectric properties, the nanoscale phase separation phenomena found in these materials are not well understood. The specific heat and thermal conductivity measurements on the typical relaxor ferroelectrics (1-x)Pb(Mg_<1/3>Nb_<2/3>)O_3-xPbTiO_3 and (1-x)Pb(Zn_<1/3>Nb_<2/3>)O_3-xPbTiO_3 showed that the thermal properties change from glasslike to crystal-like as the size of ferroelectric regions grow from nanoscale to macroscale.