The method for making piezoelectric porcelain transformer
A technology of piezoelectric ceramics and manufacturing methods, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, piezoelectric/electrostrictive/magnetostrictive devices, circuits, etc., can solve the problem of large piezoelectric anisotropy, The problems of large coercive field and high Curie point of the tetragonal phase achieve the effect of improving the comprehensive performance
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Embodiment 1
[0022] Preparation of Ceramic Materials by Oxide Solid State Reaction
[0023] (1) Prepare ceramic powder: adjust the Zr / Ti ratio (0.52:0.48) in PZT to obtain a highly active PZT ceramic material at the quasi-isomorphic phase boundary (MPB), and use it for solid solution to adjust the molar ratio of PZN and PZT (0.2: 0.8) make its fault tolerance factor in 0.9-1.1; use MnO 2 , Sb 2 o 3 、Cr 2 o 3 Doping PZN-PZT ceramic powder, the doping amount accounted for 1.0wt%, 0.5wt%, 0.5wt% of the total amount of ceramic powder;
[0024] (2) The ceramic powder is pressed under a pressure of 50MPa; the piezoelectric coefficient d is obtained 33 =421 PC / N, electromechanical coupling coefficient Kp=0.57, relative permittivity ε r =2310, mechanical quality factor Qm=507, dielectric loss tanδ=0.004, time stability and temperature stabilityτ of resonance frequency fr =90(10 -6 / ℃) ceramic sheet;
[0025] (3) Burning silver electrodes;
[0026] (4) Polarize the pressed ceramic sheet ...
Embodiment 2
[0031] Preparation of Ceramic Materials by Oxide Solid State Reaction
[0032] (1) Prepare ceramic powder: adjust the Zr / Ti ratio (0.47:0.44) in PZT to obtain a highly active PZT ceramic material at the quasi-isomorphic phase boundary (MPB), and use it to form a solid solution with it to adjust the molar ratio of PZN and PZT (0.1: 1) Make its fault tolerance factor 0.9-1.1; use MnO 2 , Sb 2 o 3 、Cr 2 o 3 Doping PZN-PZT ceramic powder, the doping amount accounts for 1.5wt% MnO of the total ceramic powder 2 , 0.1wt% Sb 2 o 3 and 0.9 wt% Cr 2 o 3 ;
[0033] (2) The ceramic powder is compressed under a pressure of 20MPa; the piezoelectric coefficient d is obtained 33 =412 PC / N, electromechanical coupling coefficient Kp=0.58, relative permittivity ε r =2280, mechanical quality factor Qm=517, dielectric loss tanδ=0.003, time stability and temperature stabilityτ of resonance frequency fr =90(10 -6 / ℃) ceramic sheet;
[0034] (3) Burning silver electrodes;
[0035] (4)...
Embodiment 3
[0040] Preparation of Ceramic Materials by Oxide Solid State Reaction
[0041] (1) Prepare ceramic powder: adjust the Zr / Ti ratio (0.56:0.53) in PZT to obtain a highly active PZT ceramic material at the quasi-isomorphic phase boundary (MPB), and use it to form a solid solution with it to adjust the molar ratio of PZN and PZT (0.4: 1) Make its fault tolerance factor 0.9-1.1; use MnO 2 , Sb 2 o 3 、Cr 2 o 3 Doping the ceramic powder of PZN-PZT, the doping amount accounts for 0.5wt% MnO of the total ceramic powder 2 , 0.9wt% Sb 2 o 3 and 0.1 wt% Cr 2 o 3 ;
[0042] (2) The ceramic powder is compressed under a pressure of 30MPa; the piezoelectric coefficient d is obtained 33 =425 PC / N, electromechanical coupling coefficient Kp=0.65, relative permittivity ε r =2314, mechanical quality factor Qm=508, dielectric loss tanδ=0.005, time stability and temperature stabilityτ of resonance frequency fr =90(10 -6 / ℃) ceramic sheet;
[0043] (3) Burning silver electrodes;
[00...
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