Barium-based magnesium zirconate-titanate lead-free piezoelectric ceramic with high piezoelectric constant
A technology of lead-free piezoelectric and zirconate titanate, which is applied in the field of piezoelectric ceramics with high piezoelectric constant magnesium barium titanate and lead-free piezoelectric ceramics with high piezoelectric constant magnesium barium zirconate titanate to achieve high voltage Constant, the effect of good dielectric properties
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Embodiment 1
[0014] Press (Ba 1-x Mg x )(Ti 1-y Zr y )O 3 Proportioning, wherein: x=0.05, y=0.05, using sol-gel method to synthesize barium zirconate titanate ceramics. First, dissolve barium hydroxide and magnesium acetate in ethylene glycol methyl ether respectively, heat and stir at 60°C and add a small amount of deionized water until the solution is clear; then dissolve zirconium ethoxide and butyl titanate in ethylene glycol methyl ether respectively, 60 ℃ heating and stirring until the solution is clear. Mix the two solutions to form a Ba-Mg-Ti-Zr composite solution, heat and stir at 60°C and add a small amount of deionized water until the solution gradually becomes a gel. The gel is dried and calcined at 900°C for 2 hours to form barium magnesium zirconate titanate powder. Use a planetary mill to pulverize, add glue, press into tablets, and sinter at 1210°C for 3 hours, then be electroded, measure dielectric properties; polarize, measure piezoelectric properties. At room temp...
Embodiment 2
[0016] Press (Ba 1-x Mg x )(Ti 1-y Zr y )O 3 Proportioning, wherein: x=0.08, y=0.04, synthetic (Ba 0.92 Mg 0.08 )(Ti 0.96 Zr 0.04 )O 3 ceramics. At first barium carbonate, magnesium carbonate, zirconium dioxide, titanium dioxide raw material, press (Ba 0.92 Mg 0.08 )(Ti 0.96 Zr 0.04 )O 3 Proportioning, mixing, crushing with a planetary mill, drying, pre-burning at 1110°C for 3 hours, crushing with a planetary mill, adding glue, pressing into tablets, sintering at 1210°C for 2 hours, and measuring the dielectric properties by electrodes; and measuring piezoelectric properties. Measure its piezoelectric constant, d 33 It is 310pC / N.
Embodiment 3
[0018] Press (Ba 1-x Mg x )(Ti 1-y Zr y )O 3 Proportioning, wherein: x=0.02, y=0.04, synthetic (Ba 0.98 Mg 0.02 )(Ti 0.96 Zr 0.04 )O 3 ceramics. All the other are with embodiment 2. The resulting piezoelectric constant, d 33 It is 230pC / N.
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