Bismuth sodium, lithium titanate, barium titanate, strontium titanate, calcium titanate based lead-free piezoelectric ceramics
A bismuth sodium lithium titanate, lead-free piezoelectric technology, applied in ceramics, piezoelectric/electrostrictive/magnetostrictive devices, circuits, etc., can solve the problems of difficult polarization and practical application, and achieve electric hysteresis Good loop rectangularity, excellent piezoelectric ferroelectric properties, excellent performance effects
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Embodiment 1
[0014] Formulation: [0.87Bi 0.5 (Na 0.925 Li 0.075 ) 0.5 TiO 3 +0.06BaTiO 3 +0.01SrTiO 3 +0.06CaTiO 3 ](97wt%)+Li 2 O(1wt%)+Y 2 o 3 (2wt%)
[0015] Performance: d 33 (pC / N) tgδ(%) ε 33 / ε 0 k p (%) Qm Poisson's ratio
[0016] 208 4.3 989 36.67 78 0.302
Embodiment 2
[0018] Formulation: [0.84Bi 0.5 (Na 0.925 Li 0.075 )0.5TiO 3 +0.08BaTiO 3 +0.02SrTiO 3 +0.06CaTiO 3 ](97wt%)+Li 2 O(1wt%)+Fe 2 o 3 (2wt%)
[0019] Performance: d 33 (pC / N) tgδ(%) ε 33 / ε 0 k p (%) Qm Poisson's ratio
[0020] 168 3.8 1185 17.3 82 0.297
[0021] When u=0, the composition formula (1-y-z) Bi is formed (1-w) (Na 1-x Li x ) w TiO 3 +yBaTiO 3 +zSrTiO 3 or add dopant M α o β (wt%) lead-free piezoelectric ceramics.
Embodiment 3
[0023] Formulation: 0.92Bi 0.6 (Na 0.90 Li 0.10 ) 0.4 TiO 3 +0.06BaTiO 3 +0.02SrTiO 3
[0024] Performance: d 33 (pC / N) tgδ(%) ε 33 / ε 0 k p (%) Qm Poisson's ratio
[0025] 200 3.6 940 32.1 109 0.296
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