A-position co-substituted piezoelectric ceramic material with high piezoelectric constant and preparation method
A piezoelectric ceramic and high-voltage technology, which is applied in the field of piezoelectric ceramics and its preparation technology, can solve the problems of inability to meet high-performance material indicators, low piezoelectric constant indicators, etc., and achieve product consistency and process repeatability. High operability and improved piezoelectric constant
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Embodiment 1
[0019] with Pb 3 o 4 (industrial pure), BaCO 3 (industrial pure), ZrO 2 (industrial pure), TiO 2 (industrial pure), Nb 2 o 5 (analytical pure), La 2 o 3 (analytical pure), Al 2 o 3 (chemically pure) as raw material, according to the composition of the material into Pb 0.92 Ba 0.04 La 0.04 (Ni 1 / 3 Nb 2 / 3 ) 0.12 (Zn 1 / 3 Nb 2 / 3 ) 0.12 Zr 0.39 Ti 0.37 o 3 +0.1wt%Al 2 o 3 The stoichiometry of the ingredients is weighed.
[0020]Agate balls and deionized water are used as the medium for mixing materials. According to the ratio of material: balls: water = 1: 1.5: 1.2, the weighed raw materials are mixed in a planetary ball mill for 4 hours, and then the materials are sieved to separate the agate balls. , and then fully dried in an oven at 120°C.
[0021] Put the dried raw materials into the crucible, cover the lid to prevent the volatilization of PbO, and pre-fire them at a temperature of 900 ° C ~ 920 ° C for 3 hours, crush the pre-fired blocks, and pass thro...
Embodiment 2
[0027] with Pb 3 o 4 (industrial pure), BaCO 3 (industrial pure), ZrO 2 (industrial pure), TiO 2 (industrial pure), Nb 2 o 5 (analytical pure), La 2 o 3 (analytical pure), Al 2 o 3 (chemically pure), Sb 2 o 3 (chemically pure) as the raw material, according to the material composition Pb 0.90 Ba 0.06 La 0.04 (Ni 1 / 3 Nb 2 / 3 ) 0.12 (Zn 1 / 3 Nb 2 / 3 ) 0.12 Zr 0.395 Ti 0.365 o 3 +0.1wt%Al 2 o 3 +0.3wt%Sb 2 o 3 The stoichiometry of the ingredients is weighed.
[0028] Agate balls and deionized water are used as the medium for mixing materials. According to the ratio of material: balls: water = 1: 1.5: 1.2, the weighed raw materials are mixed in a planetary ball mill for 4 hours, and then the materials are sieved to separate the agate balls. , and then fully dried in an oven at 120°C.
[0029] Put the dried raw materials into the crucible, cover the lid to prevent the volatilization of PbO, and pre-fire them at a temperature of 920 ° C ~ 950 ° C for 3 hours...
Embodiment 3
[0035] with Pb 3 o 4 (industrial pure), BaCO 3 (industrial pure), ZrO 2 (industrial pure), TiO 2 (industrial pure), Nb 2 o 5 (analytical pure), La 2 o 3 (analytical pure), Al 2 o 3 (chemically pure), Sb 2 o 3 (chemically pure), Fe 2 o 3 (analytical pure), Bi 2 o 3 (analytical pure) as the raw material, according to the composition of the material as Pb 0.88 Ba 0.06 La 0.06 (Ni 1 / 3 Nb 2 / 3 ) 0.12 (Zn 1 / 3 Nb 2 / 3 ) 0.12 Zr 0.40 Ti 0.36 o 3 +0.15wt%Al 2 o 3 +0.35wt%Sb 2 o 3 +0.35wt%Fe 2 o 3 +0.5wt% Bi 2 o 3 The stoichiometry of the ingredients is weighed.
[0036] Agate balls and deionized water are used as the medium for mixing materials. According to the ratio of material: balls: water = 1: 1.5: 1.2, the weighed raw materials are mixed in a planetary ball mill for 4 hours, and then the materials are sieved to separate the agate balls. , and then fully dried in an oven at 120°C.
[0037] Put the dried raw materials into the crucible, cover the l...
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