Eichhorn Franziska, Kellermann Simone, Betke Ulf, Fey Tobias
Institute of Glass and Ceramics, Department of Materials Science and Engineering, University of Erlangen-Nürnberg, Martensstraße 5, 91058 Erlangen, Germany.
Institute for Materials and Joining Technology-Nonmetallic Inorganic Materials and Composites, Otto-von-Guericke-University Magdeburg, Große Steinernetischstraße 6, 39104 Magdeburg, Germany.
Materials (Basel). 2020 Mar 26;13(7):1520. doi: 10.3390/ma13071520.
PZT-silsesquioxane-based 0-3 hybrid materials are prepared by mixing lead zirconate titanate (Pb(Zr,Ti)O; PZT) powder with a [R-SiO] (R = H, CH, CH=CH, CH) silsequioxane preceramic polymer. A PZT load up to 55 vol.% can be reached in the final composite. The piezoelectric and mechanical properties are investigated as a function of the filler content and are compared with theoretical models and reference samples made of the pure preceramic polymer or PZT filler. The piezoelectric response of the composites, as expressed by the relative permittivity and the piezoelectric coefficients d and g, increases with an increasing PZT content. The bending strength of the composites ranges between 15 MPa and 31 MPa without a clear correlation to the filler content. The thermal conductivity increases significantly from 0.14 W∙m∙K for the pure polymer-derived ceramic (PDC) matrix to 0.30 W∙m∙K for a sample containing 55 vol.% PZT filler. From X-ray diffraction experiments (XRD), specific interactions between the filler and matrix are observed; the crystallization of the PDC matrix in the presence of the PZT filler is inhibited; conversely, the PDC matrix results in a pronounced decomposition of the filler compared to the pure PZT material.
基于锆钛酸铅-倍半硅氧烷的0-3杂化材料是通过将锆钛酸铅（Pb(Zr,Ti)O₃；PZT）粉末与[R-SiO₁.₅]（R = H、CH₃、CH=CH₂、C₆H₅）倍半硅氧烷预陶瓷聚合物混合制备而成。在最终的复合材料中，PZT的负载量可达55体积%。研究了压电和力学性能与填料含量的关系，并与由纯预陶瓷聚合物或PZT填料制成的理论模型和参考样品进行了比较。复合材料的压电响应，以相对介电常数和压电系数d和g表示，随着PZT含量的增加而增加。复合材料的弯曲强度在15MPa至31MPa之间，与填料含量没有明显的相关性。热导率从纯聚合物衍生陶瓷（PDC）基体的0.14W·m⁻¹·K显著增加到含有55体积%PZT填料的样品的0.30W·m⁻¹·K。通过X射线衍射实验（XRD）观察到填料与基体之间存在特定的相互作用；在PZT填料存在的情况下，PDC基体的结晶受到抑制；相反，与纯PZT材料相比，PDC基体导致填料明显分解。
