Temperature‐induced changes of the electrical and mechanical properties of aerosol‐deposited BaTiO3 thick films for energy storage applications
Temperature‐induced changes of the electrical and mechanical properties of aerosol‐deposited BaTiO3 thick films for energy storage applications
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用于储能应用的气溶胶沉积 BaTiO3 厚膜的电气和机械性能随温度变化的变化
DOI：
10.1111/jace.18377
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发表时间：
2022
影响因子：
3.9
通讯作者：
Roedel Juergen
中科院分区：
文献类型：
--
作者：
Zhuo Fangping;Eckstein Udo R.;Khansur Neamul H.;Dietz Christian;Urushihara Daisuke;Asaka Toru;Kakimoto Ken-ichi;Webber Kyle G.;Fang Xufei;Roedel Juergen
气溶胶沉积（AD）是一种室温薄膜沉积方法，用于在不同衬底上制造可扩展的铁电陶瓷薄膜，这对于厚膜储能应用特别有吸引力。然而，AD铁电薄膜的电学和力学性能尚未得到令人满意的了解。在这里，我们通过结合宏观电测量和压痕测试，报告了气溶胶沉积的具有纳米颗粒的BaTiO3（AD - BT）厚膜的介电、储能和力学性能。我们发现，热退火是提高AD - BT薄膜介电常数和极化率，提高薄膜硬度和杨氏模量的有效方法。然而，与处理后的样品相比，退火后的AD - BT薄膜中的裂纹形成更明显，这表明退火过程中纳米晶粒之间的相互作用和内应力的释放可能对机械性能产生重大影响，因此在应用中应该考虑到这一点。
Aerosol deposition (AD) is a room‐temperature film deposition method for the fabrication of scalable ferroelectric ceramic films on different substrates, which is particularly appealing for thick film energy storage applications. However, the electrical and mechanical properties of AD ferroelectric films are not yet satisfactorily understood. Here, we report the dielectric, energy storage, and mechanical properties of aerosol‐deposited BaTiO3(AD‐BT) thick films with nanosized grains by combining macroscopic electric measurements with indentation tests. We find that thermal annealing is an effective way to improve dielectric permittivity and polarization of the AD‐BT film, as well as to increase the hardness and Young's modulus of the film. However, crack formation in the annealed AD‐BT film is promoted in comparison to the as‐processed sample, suggesting that the interplay between the nanosized grains and release of the internal stress during annealing may have major consequences for the mechanical properties and hence should be taken into consideration in application.