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En route to superhard and 1D conductive carbon allotropes via unusual sp 2–sp 3 bonding configuration
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Perlmutter Supercomputer Provides Peek into Interior of Ice Giant Planets
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Chalcogen isotopes reveal limited volatile contribution from late veneer to Earth
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Intrinsically low lattice thermal conductivity in layered Mn3Si2Te6
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Abstract
Capacitor is an important part of many electronic devices, so the temperature stability as one key parameter of capacitor needs to be improved constantly for meeting the requirements of various application temperature. Here, combined with the X-ray diffraction (XRD), selected area electron diffraction (SAED) and Vienna Ab-initio Simulation Package (VASP) calculation, it was confirmed that Ca ion can substitute the Ti site in the BaTi Ca O [BTC100×] (0 ≤ x ≤ 0.05) ceramics synthesized by solid-phase method which greatly improved the low-temperature stability of dielectric constant. Moreover, introducing Bi and Zn into BTC4 to form (1-y)BaTi Ca O -yBi(Zn Ti )O [(1-y)BTC4-yBZT] (0.1 ≤ y ≤ 0.2) ceramics can further improve the dielectric-temperature stability by means of diffused phase transition and core-shell structure. Most importantly, the 0.85BTC4-0.15BZT ceramics with a pseudocubic perovskite structure possessed a temperature coefficient of capacitance at 25