WAluminium nitride
WApatite
WBarium titanate
WBimorph
WBismuth titanate
WLanthanum gallium silicate
WLead zirconate titanate
WLithium tantalate
WPiezoelectric accelerometer
WPolyvinylidene fluoride
WPotassium niobate
WPotassium sodium tartrate
WQuartz
WRutilated quartz
WUnimorph
WZinc oxide