Piezoelectric ceramic material, application of piezoelectric ceramic material and preparation method of piezoelectric ceramic material
A technology of piezoelectric ceramics and piezoelectric charges, applied in the direction of piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve the problem of low depolarization temperature of piezoelectric materials and inability to meet high temperature service requirements, etc. question
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[0040] [Preparation method of piezoelectric ceramic material]
[0041] The preparation method of the piezoelectric ceramic material is used to prepare the aforementioned piezoelectric ceramic material, including steps: Step 1: the raw materials ZnO and Nb 2 o 5 Weigh according to the chemical molar ratio, ball mill in a horizontal ball mill for 4 hours with anhydrous ethanol as the medium, and then calcined at 1000°C for 4 hours to synthesize ZnNb 2 o 6 Precursor; Step 2: Using ZnNb 2 o 6 The precursors are zinc and niobium sources, and the raw material Pb 3 o 4 、TiO 2 、 Bi 2 o 3 、Sc 2 o 3 with ZnNb 2 o 6 , weighed according to the chemical molar ratio of the elements in the piezoelectric ceramic material, put the weighed raw materials into a ball mill jar, and place them in a horizontal ball mill with absolute ethanol as the medium for ball milling for 24 hours to obtain powder; step 3: bake After the dry powder is calcined, it is cooled to room temperature with ...
Embodiment 1
[0049] According to the chemical formula zBiScO 3 -yPb(Zn 1 / 3 Nb 2 / 3 )O 3 -xPbTiO 3 , where the value of x is 0.60, the value of y is 0.05, and the value of z is 0.35.
[0050] Step 1: the raw materials ZnO and Nb 2 o 5 Weigh according to the chemical molar ratio, ball mill in a horizontal ball mill for 4 hours with anhydrous ethanol as the medium, and then calcined at 1000°C for 4 hours to synthesize ZnNb 2 o 6 Precursor;
[0051] Step 2: Using ZnNb 2 o 6 The precursors are zinc and niobium sources, and the raw material Pb 3 o 4 、TiO 2 、 Bi 2 o 3 、Sc 2 o 3 with ZnNb 2 o 6 , weighed according to the chemical molar ratio of the elements in the piezoelectric ceramic material, put the weighed raw materials into a ball mill jar, put them in a horizontal ball mill with absolute ethanol as the medium, and mill them for 24 hours to obtain the powder, and put them under the condition of 100°C drying;
[0052] Step 3: After calcination at 850°C for 2 hours, cool dow...
Embodiment 2
[0058] According to the chemical formula zBiScO 3 -xPbTiO 3 -yPb(Zn 1 / 3 Nb 2 / 3 )O 3 , where x takes a value of 0.61, y takes a value of 0.05, z takes a value of 0.34, and others are the same as in embodiment 1.
[0059] The obtained piezoelectric ceramic materials were assembled into a single-layer cantilever energy harvester, and the high-temperature energy harvesting performance test was carried out. The test results are shown in Table 1.
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