[1] E. K. Akdogan, M. Allahverdi, A. Safari. Piezoelectric composites for sensor and actuator applications. IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 52, 746(2005).

[2] F. Wang, C. He, Y. Tang. Single crystal 0.7Pb(Mg1/3Nb2/3)- O3–0.3PbTiO3/epoxy 1–3 piezoelectric composites prepared by the lamination technique. Mater. Chem. Phys., 105, 273(2007).

[3] K. Ren, Y. Liu, X. Geng, H. F. Hofmann, Q. M. Zhang. Single crystal PMN–PT / epoxy 1–3 composite for energy-harvesting application. IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 53, 631(2006).

[4] V. Yu. Topolov, C. R. Bowen. Electromechanical Properties in Composites Based on Ferroelectrics(2009).

[5] I. Coondoo, N. Panwar, A. Kholkin. Lead-free piezoelectrics: Current status and perspectives. J. Adv. Dielect., 3, 1330002(2013).

[6] C.-H. Hong, H.-P. Kim, B.-Y. Ghoi, H.-S. Han, J.-S. Son, C.W. Ahn, W. Jo. Lead-free piezoceramics — Where to move on?. J. Materiomics, 2, 1(2016).

[7] D. Maurya, M. Peddigari, L. D. Geng, N. Sharpes, V. Annapureddy, H. Palneedi, R. Sriramdas, Y. Yan, H.-C. Song, Y. U. Wang, J. Ryu, S. Priya. Lead-free piezoelectric materials and composites for high power density energy harvesting. J. Mater. Res., 33, 2235(2018).

[8] D. Zhou, K. H. Lam, Yan Chen, Q. Zhang, Y. C. Chiu, H. Luo, J. Dai, H. L. W. Chan. Lead-free piezoelectric single crystal based 1–3 composites for ultrasonic transducer applications. Sens. Actuators A Phys., 182, 95(2012).

[9] V. L. Stuber, D. B. Deutz, J. Bennett, D. Cannel, D. M. de Leeuw, S. van der Zwaag, P. Groen. Flexible lead-free piezoelectric composite materials for energy harvesting applications. Energy Technol., 7, 177(2019).

[10] V. Yu. Topolov, A. N. Isaeva, P. Bisegna. Novel lead-free composites with two porosity levels: Large piezoelectric anisotropy and high sensitivity. J. Phys. D Appl. Phys., 53, 395303(2020).

[11] V. Yu. Topolov, C. R. Bowen, A. N. Isaeva. Anisotropy factors and electromechanical coupling in lead-free 1–3-type composites. IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 65, 1278(2018).

[12] S. A. Riquelme, K. Ramam. Dielectric and piezoelectric properties of lead free BZT-BCT/PVDF flexible composites for electronic applications. Mater. Res. Express, 6, 116331(2019).

[13] S. Qian, L. Qin, J. He, X. Niu, J. Qian, J. Mu, W. Geng, X. Hou, X. Chou. A stretchable piezoelectric elastic composite. Mater. Lett., 236, 96(2019).

[14] S. A. Wilson, G. M. Maistros, R. W. Whatmore. Structure modification of 0–3 piezoelectric ceramic/polymer composites through dielectrophoresis. J. Phys. D: Appl. Phys., 38, 175(2005).

[15] H. Khanbareh, V. Yu. Topolov, C. R. Bowen. Piezo-Particulate Composites. Manufacturing, Properties, Applications(2019).

[16] H. Khanbareh, K. de Boom, S. van der Zwaag, W.A. Groen. Highly sensitive piezo particulate-polymer foam composites for robotic skin application. Ferroelectrics, 515, 25(2017).

[17] F.-Z. Yao, K. Wang, J.-F. Li. J. Comprehensive investigation of elastic and electrical properties of Li/Ta-modified (K,Na)NbO3 lead-free piezoceramics. J. Appl. Phys., 113, 174105(2013).

[18] L. Qiao, G. Li, H. Tao, J. Wu, Z. Xu, F. Li. Full characterization for material constants of a promising KNN-based lead-free piezoelectric ceramic. Ceram. Int., 46, 5641(2020).

[19] R. E. Newnham, D. P. Skinner, L. E. Cross. Connectivity and piezoelectric — pyroelectric composites. Mater. Res. Bull., 13, 525(1978).

[20] M. L. Dunn, M. Taya. Micromechanics predictions of the effective electroelastic moduli of piezoelectric composites. Internat. J. Solids Struct., 30, 161(1993).

[21] J. H. Huang, S. Yu. Electroelastic Eshelby tensors for an ellipsoidal piezoelectric inclusion. Composites Eng., 4, 1169(1994).

[22] M. L. Dunn, M. Taya. Electromechanical properties of porous piezoelectric ceramics. J. Am. Ceram. Soc., 76, 1697(1993).

[23] T. Ikeda. Fundamentals of Piezoelectricity(1990).

[24] J. I. Roscow, H. Pearce, H. Khanbareh, S. Kar-Narayan, C. R. Bowen. Modified energy harvesting figures of merit for stress and strain-driven piezoelectric systems. Eur. Phys. J. Special Topics, 228, 1537(2019).

[25] K. E. Evans, K. L. Alderson. The static and dynamic moduli of auxetic microporous polyethylene. J. Mater. Sci. Lett., 11, 1721(1992).

[26] V. Yu. Topolov, P. Bisegna, C. R. Bowen. Piezo-Active Composites. Microgeometry — Sensitivity Relations(2018).

[27] V. Yu. Topolov, P. Bisegna, C. R. Bowen. Analysis of the piezoelectric performance of modern 0–3-type composites based on relaxor-ferroelectric single crystals. Ferroelectrics, 413, 176(2011).

[28] M. Fukushima, T. Fujiwara, T. Fey, K. Kakimoto. One- or two-dimensional channel structures and properties of piezoelectric composites via freeze-casting. J. Am. Ceram. Soc., 100, 5400(2017).

[29] N. K. James, D. B. Deutz, R. K. Bose, S. van der Zwaag, P. Groen. High piezoelectric voltage coefficient in structured lead-free (K, Na, Li)NbO3 particulate — epoxy composites. J. Am. Ceram. Soc., 99, 3957(2016).