A low-temperature sintered ternary system relaxor ferroelectric ceramic material
A low-temperature sintering technology for ferroelectric ceramics, applied in circuits, electrical components, piezoelectric/electrostrictive/magnetostrictive devices, etc., can solve the problems of material component deviation, electrical performance decline, and high sintering temperature, and achieve Effects of improved high-field piezoelectric performance, enhanced temperature stability, and high electrical performance
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specific Embodiment approach 1
[0019] Specific Embodiment 1: The general chemical formula of a low-temperature sintered ternary system relaxor ferroelectric ceramic material in this embodiment is xPb(In 1 / 2 Nb 1 / 2 )O 3 -(1-x-y)Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -yPbTiO 3 -awt.% CuO, where 0.16≤x≤0.36, 0.32≤y≤0.36, 0<a≤2.
specific Embodiment approach 2
[0020] Embodiment 2: In this embodiment, a method for preparing a low-temperature sintered ternary system relaxor ferroelectric ceramic material is completed according to the following steps:
[0021] 1. Synthesis of pure-phase MgNb by solid-state reaction method 2 o 6 Precursor powder;
[0022] 2. Synthesis of pure phase InNbO by solid phase reaction method 4 Precursor powder;
[0023] Three, with PbO, TiO 2 , the MgNb of the pure phase that step one obtains 2 o 6 Precursor powder and pure phase InNbO obtained in step 2 4 The precursor powder was used as the raw material, and the pure phase xPb(In 1 / 2 Nb 1 / 2 )O 3 -(1-x-y)Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -yPbTiO 3 Matrix powder, where 0.16≤x≤0.36, 0.32≤y≤0.36;
[0024] 4. The pure phase xPb(In 1 / 2 Nb 1 / 2 )O 3 -(1-x-y)Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -yPbTiO 3 The matrix powder is used as the raw material, and the low-temperature sintered ternary system relaxor ferroelectric ceramic material is prepared by using the solid phas...
specific Embodiment approach 3
[0025] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the MgNb of pure phase is synthesized by solid phase reaction method in step one 2 o 6 Precursor powder is specifically carried out according to the following steps:
[0026] According to the chemical formula MgNb 2 o 6 The ratio of MgO and Nb was weighed 2 o 5 , will weigh the MgO and Nb 2 o 5 Mix and place in a polyethylene ball milling tank, use absolute ethanol as the ball milling medium, agate balls as the balls, and mill for 24h to 72h to obtain the wet material A after ball milling, and place the wet material A after ball milling at a temperature of 50°C Dry in an oven at ~100°C to obtain dry block A, grind and crush the dry block A in an agate mortar to obtain powder A, then place powder A in a covered alumina crucible, Pre-calcine at 1000℃~1150℃ for 2h~6h to obtain pure phase MgNb 2 o 6 Precursor powder. Others are the same as in the second embodiment.
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