Transition metal element-doped bismuth calcium niobate ceramic material and preparation method thereof
A transition metal element, bismuth-calcium niobate technology, applied in the field of lead-free piezoelectric materials, can solve the problems of unsuitability for large-scale industrial production, poor piezoelectric performance of bismuth-calcium niobate ceramics, and high cost of plasma sintering. The effect of advancing application progress, improving piezoelectric performance, and good high-temperature stability
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[0032] Example 1:
[0033] Prepared in accordance with chemical formula Ca 1-x Fe x Bi 2 Nb 2 O 9 , And x=0.05 Fe-doped bismuth calcium niobate ceramics.
[0034] Analyze pure powder raw material: 0.100g Fe 2 O 3 , 2.377g CaCO 3 , 11.882gBi 2 O 3 And 6.645gNb 2 O 5 , According to the common ceramic preparation process, the ingredients are mixed, and then the raw materials are mixed with alcohol and then ball milled for 24 hours, pre-fired at 900 ℃ for 2 hours, secondary ball milling for 24 hours, drying, grinding in a mortar, pressing, 550 ℃ plastic discharge, The Fe-doped bismuth calcium bismuth niobate layered structure lead-free piezoelectric ceramic material was obtained by sintering at 1200°C for 4 hours. The resulting ceramic sample was ground into a thin sheet with a thickness of 0.4mm, and Pt electrodes were placed on the upper and lower surfaces of the sheet, and polarized in silicon oil at 200°C at a voltage of 10KV / mm-20KY / mm for 10 minutes to test its electrical propert...
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[0037] Example 2:
[0038] Prepared in accordance with chemical formula Ga 1-x Mn x Bi 2 Nb 2 O 9 And x=0.05 Mn-doped calcium bismuth niobate ceramics.
[0039] Analyze pure powder raw material: 0.144g MnCO 3 , 2.377g CaCO 3 , 11.882gBi 2 O 3 And 6.645gNb 2 O 5 , According to the common ceramic preparation process, the ingredients are mixed, and then the raw materials are mixed with alcohol and then ball milled for 24 hours, pre-fired at 900 ℃ for 2 hours, secondary ball milling for 24 hours, drying, grinding in a mortar, pressing, 550 ℃ plastic discharge, Sintered at 1200°C for 4 hours to obtain Mn-doped bismuth niobate calcium bismuth layered lead-free piezoelectric ceramic material. The resulting ceramic samples were ground into thin slices with a thickness of 0.4mm, and Pt electrodes were placed on the upper and lower surfaces of the slices, and they were polarized in silicon oil at 200°C at a voltage of 10KV / mm-20KV / mm for 10 minutes to test their electrical properties. D of ...
Example Embodiment
[0042] Example 3:
[0043] Prepared in accordance with chemical formula Ca 1-x Co x Bi 2 Nb 2 O 9 , And x=0.05 Co-doped calcium bismuth niobate ceramics.
[0044] Analyze pure powder raw material: 0.104g Co 2 O 3 , 2.377g CaCO 3 , 11.882gBi 2 O 3 And 6.645gNb 2 O 5 , According to the common ceramic preparation process, the ingredients are mixed, and then the raw materials are mixed with alcohol and then ball milled for 24 hours, pre-fired at 900 ℃ for 2 hours, secondary ball milling for 24 hours, drying, grinding in a mortar, pressing, 550 ℃ plastic discharge, Sintering at 1200℃ for 4h can obtain Co-doped bismuth niobate calcium bismuth layered lead-free piezoelectric ceramic material. The resulting ceramic samples were ground into thin slices with a thickness of 0.4mm, and Pt electrodes were placed on the upper and lower surfaces of the slices, and they were polarized in silicon oil at 200°C at a voltage of 10KV / mm-20KV / mm for 10 minutes to test their electrical properties. D of ...
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