Experimental and simulated performance of lithium niobate 1-3 piezocomposites for 2Â MHz non-destructive testing applications

► Design principles were investigated for lithium niobate 1-3 piezocomposites. ► kt of the piezocomposite material was 0.2 down to a volume fraction of 30%. ► Experiments agreed with 3-D finite element modelling for pillar aspect ratio 6. ► A well-behaved lithium niobate piezocomposite requires pillar aspect ratio of 6.