Ceramic material and piezoelectric element using the same
A ceramic material, piezoelectric strain constant technology, applied in electrical components, piezoelectric/electrostrictive/magnetostrictive devices, device material selection, etc., can solve the problem of small dielectric loss dissipation coefficient, unknown piezoelectric materials and other problems, to achieve the effect of excellent piezoelectric properties and less self-heating
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Embodiment 1
[0097] Will be made of PbO, ZrO 2 、TiO 2 , ZnO, CoO, NiO and Nb 2 o 5 , and La 2 o 3 or K 2 CO 3 The raw material powder that constitutes, in meeting the Pb 1-a m 1 a-b [(M 21 / 3 Nb 2 / 3-c ) α Zr β Ti γ ]O d According to the composition formula of the condition of , weigh according to the specified ratio shown in Table 1, and use a ball mill to fully wet mix the raw material powder.
[0098]
[0099] m 1 : Sample 9 used K. La was used for other samples 1-8 and 10-16.
[0100] m 2 : Sample 4 used Sr, Ni, and Zn. In other samples 1-3 and 5-16, Co, Ni, and Zn were used.
[0101] Next, the obtained mixed powder was calcined at 900° C. for 2 hours in the air, and then wet pulverized using a ball mill.
[0102] After mixing 2% by weight of an organic binder (polyvinyl alcohol) to the powder pulverized as above, a powder was obtained by passing through a mesh of 150 μm. The obtained powder was compression-molded into a disc shape with a diameter of 20 mm and a t...
Embodiment 2
[0123] Will be made of PbO, ZrO 2 、TiO 2 , ZnO, CoO, NiO and Nb 2 o 5 , and La 2 o 3 or K 2 CO 3 The raw material powders to be constituted were weighed at a predetermined ratio shown in Table 2 under the composition formula satisfying the following conditions, and the raw material powders were fully wet-mixed using a ball mill.
[0124] Pb x m 3 1-x [(M 4 1 / 3 Nb 2 / 3 ) e (Co 1 / 3 Nb 2 / 3 ) f (Zn 1 / 3 Nb 2 / 3 ) g Zr h Ti i ]O 3
[0125]
[0126] m 3 : Sample 17-33 used La. Sample 33 uses K.
[0127] m 4 : Ni was used in all samples.
[0128] Next, the obtained mixed powder was calcined under the same conditions as in Example 1, and then wet pulverized using a ball mill.
[0129] The above pulverized powder was fired in the same manner as in Example 1 to form electrodes, and a voltage was applied to separate them. Table 2 shows the results of measuring the piezoelectric characteristics of the respective ceramic materials after 24 hours or more have ela...
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