The pyroelectric and piezoelectric properties of 4 at% Mn-doped Bi₄Ti_2.9W_0.1O₁₂ (BiTW-Mn) Aurivillius ceramic were investigated and compared to Bi₄Ti_2.9W_0.1O₁₂ (BiTW) counterpart, which were fabricated using a conventional solid state reaction method. High resistivities of 4.9 × 10¹² and 2.5 × 10¹¹ Ω cm at 100 °C were obtained in the W-doped and W/Mn-codoped BiT ceramics, respectively. They showed similar activation energies and ionic-p-type mixed conduction mechanisms. Higher pyroelectric coefficients of 57.1 μC/m²K and piezoelectric coefficients of 21 pC/N, as well as much lower dielectric loss of 0.003 were achieved in W/Mn-codoped ceramics. These property changes were mainly induced by $\text{M}{\text{n}}_{\text{Ti}}^{}-{\text{V}}_{\text{o}}^{}$ defect dipoles. The effect of acceptor doping was evidenced by an internal bias field, shown by a horizontal offset in the polarization-field behavior. The improved properties together with high thermal stability indicate that BiTW-Mn may be a promising candidate for pyroelectric and piezoelectric devices at elevated temperatures.

研究了4at ％Mn掺杂的Bi ₄ Ti _2.9 W _0.1 O ₁₂（BiTW-Mn）Aurivillius陶瓷的热电和压电性能，并将其与Bi ₄ Ti _2.9 W _0.1 O ₁₂（BiTW）对应物进行了比较。常规的固态反应方法。的4.9×10高电阻率¹²和2.5×10 ¹¹在W-掺杂和W /锰共掺杂的位分别陶瓷得到在100℃下Ω厘米。他们显示出相似的活化能和离子p型混合传导机制。较高的热电系数为57.1μC/ m ²在掺有W / Mn的陶瓷中，K和压电系数为21 pC / N，介电损耗低得多，为0.003。这些属性变化主要是由$\text{中号}{\text{ñ}}_{\text{钛}}^{}-{\text{伏特}}_{\text{Ø}}^{}$缺陷偶极子。受主掺杂的影响由内部偏置场证明，内部偏置场由极化场行为中的水平偏移表示。改进的性能以及高的热稳定性表明，BiTW-Mn可能是高温下热释电和压电器件的有前途的候选者。