0-3 and 1-3 piezocomposites based on single crystal PMN-PT for transducer applications

Abstract

0-3 and 1-3 composites were fabricated using piezoelectric single crystals (PSCs). These two connectivities were specifically chosen for large area fabrication. In particular, a lamination technique was used for 1-3 piezocomposites instead of the standard 'dice and fill' method. For 0-3 connectivity, the thickness coupling factor of the fabricated materials using PSC phase was twice that obtained using standard PZT powder for the same volume fraction (60%). However, the efficiency of the poling remained low. For the 1-3 piezocomposites, the properties (such as the thickness coupling factor which reached 74%) of the samples fabricated by the lamination technique were comparable to those obtained with standard methods. Finally, three ultrasonic transducers with centre frequencies between 600 and 850 kHz were fabricated to evaluate the performance of these new piezoelectric composites.

Fabrication and characterization of large area 1–3 piezo-composites based on PMN-PT single crystals for transducer applications

“…Experimental (k t ) are in good agreement with those obtained with the homogenized Smith model [6] for samples 1 and 2 (with data from Tables II and III) [7]. But for the sample 3, experimental value is lower than the theoretical prediction.…”

Theoretical and Experimental Studies on Sensitivity and Bandwidth of Thickness-Mode Driving Hydrophone Utilizing A 2-2 Piezoelectric Single Crystal Composite

“…In recent studies [ 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ], relaxor-PT single crystals such as Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 (PMN-PT) and Pb(Zn 1/3 Nb 2/3 )O 3 -PbTiO 3 (PZN-PT) have been investigated as active materials for composites. Single crystals exhibit superior piezoelectric properties compared to PZT ceramics; for example, they have piezoelectric coefficients d over 1500 pC/N and electromechanical coupling factors k 33 around 0.90 [ 27 , 28 , 29 ].…”

“…Even though 2-2 composites show slightly lower electromechanical coupling compared to 1-3 composites, they have merits associated with the dice-and-fill fabrication process. Several further studies [ 22 , 23 , 24 , 25 , 26 ] investigated 2-2 composites based on single crystals for high sensitivity and wide bandwidth.…”

Сравнительное Исследование Инкрементальной Самосогласованной И Эшелби–Mори–Tанака Моделей Для Оценки Электроупругих Свойств Пьезоэлектрических Полимерных Композитов С Ортотропной Матрицей

“…Присущая этим композитам способность преобразовывать механическую энергию в электрическую и наоборот делает их чрезвычайно популярными в качестве исполнительных механизмов и датчиков в микроустройствах [2,3]. Некоторые примеры таких полимерных композитовполидиметилсилоксан (PDMS)/титанат бария (BaTiO 3 ) [4], SU8/оксид цинка (ZnO) [5], PDMS/ниобат магния -титанат свинца (PMN-PT) [6], эпоксид/PMN-PT [7]. Использование микромеханических моделей для предсказания эффективных свойств композитов снижает стоимость и время физических экспериментов.…”