CN101239824B - Sodium potassium niobate barium zirconate titanate series lead-free piezoelectric ceramic composition - Google Patents
Sodium potassium niobate barium zirconate titanate series lead-free piezoelectric ceramic composition Download PDFInfo
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- 239000000919 ceramic Substances 0.000 title claims abstract description 56
- 239000000203 mixture Substances 0.000 title claims abstract description 30
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 title claims abstract description 9
- -1 barium zirconate titanate series Chemical class 0.000 title claims description 10
- 229910021523 barium zirconate Inorganic materials 0.000 title claims description 8
- 239000011734 sodium Substances 0.000 claims abstract description 44
- JCLFHZLOKITRCE-UHFFFAOYSA-N 4-pentoxyphenol Chemical compound CCCCCOC1=CC=C(O)C=C1 JCLFHZLOKITRCE-UHFFFAOYSA-N 0.000 claims abstract description 7
- 150000001875 compounds Chemical class 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052797 bismuth Inorganic materials 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 229910052684 Cerium Inorganic materials 0.000 claims description 2
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 2
- 229910052691 Erbium Inorganic materials 0.000 claims description 2
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 2
- 229910052779 Neodymium Inorganic materials 0.000 claims description 2
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 2
- 229910052772 Samarium Inorganic materials 0.000 claims description 2
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 229910052787 antimony Inorganic materials 0.000 claims description 2
- 229910052788 barium Inorganic materials 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 229910052738 indium Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052746 lanthanum Inorganic materials 0.000 claims description 2
- 229910052744 lithium Inorganic materials 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- 229910052700 potassium Inorganic materials 0.000 claims description 2
- 229910052706 scandium Inorganic materials 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 229910052712 strontium Inorganic materials 0.000 claims description 2
- 229910052715 tantalum Inorganic materials 0.000 claims description 2
- 229910052718 tin Inorganic materials 0.000 claims description 2
- 229910052727 yttrium Inorganic materials 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 229910002113 barium titanate Inorganic materials 0.000 abstract description 2
- YIMPFANPVKETMG-UHFFFAOYSA-N barium zirconium Chemical compound [Zr].[Ba] YIMPFANPVKETMG-UHFFFAOYSA-N 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 239000000654 additive Substances 0.000 description 3
- 238000000498 ball milling Methods 0.000 description 3
- 239000010953 base metal Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052726 zirconium Inorganic materials 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910013641 LiNbO 3 Inorganic materials 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005621 ferroelectricity Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The present invention provides a novel potassium-sodium niobate zirconium barium titanate series leadless piezoelectric ceramic composition which comprises perovskite type piezoelectrics K<1-x>Na<x>NbO3 and strong ferroelectrics Ba(Ti<1-y>Zr<y>)O3, the general formula is represented by (1-z)(K<1-x>Na<x>)NbO3-zBa(Ti<1-y>Zr<y>)O3, in the formula 0<x<1, 0<y<1, 0<z<=0.1. The leadless piezoelectric ceramic composition can also comprises one or a plurality of oxides, the general formula is (1-z)(k<1-x>Na<x>)NbO3-zBa(Ti<1-y> Zr<y>)O3((100-a)mol%+M<alpha>O<beta>(amol%). The optimal value d33 of the system piezoelectric ceramic composition can up to above 230pC/N, kp can up to above 48%, and the kt can up to above 47%, has the advantages of good compactness, high Curie temperature, good thermal stability, being prepared with the conventional piezoelectric ceramic preparing technique and has practicability.
Description
Technical field
The invention belongs to perovskite structure piezoelectric ceramics field, relate to a kind of novel polynary system columbate leadless piezoelectric ceramic composition, particularly relate to a kind of sodium potassium niobate barium zirconate titanate series lead-free piezoelectric ceramic composition.
Background technology
From the piezoelectricity of middle 1940s discovery barium titanate ceramics, particularly have Pb-based lanthanumdoped zirconate titanates Pb (Ti, Zr) O of excellent piezoelectric property and high-curie temperature
3After pottery was succeeded in developing, constitutional features was ABO
3The research and development of the lead-based perovskite piezoelectric ceramics of type are very active, and piezoelectric ceramics and piezoelectric ceramic devices have been widely used in particularly information industry field of industry.With (Pb (Ti, Zr) O
3) for the lead base two component system of representative with Pb-based lanthanumdoped zirconate titanates (Pb (Ti, Zr) O
3) be base, add the 3rd constituent element [as with lead magnoniobate (Pb (Mg
1/3Nb
2/3) O
3) for representative] and the lead base ternary system piezoelectric ceramic have good piezoelectricity ferro performance, high Curie temperature.The piezoelectric ceramics overwhelming majority who uses in the industrial production is such lead base piezoelectric ceramics.
But, in the lead base piezoceramic material, PbO or Pb
3O
4Content account for 70% of raw material total amount.Lead contamination has become one of human public hazards.The lead base piezoelectric ceramics produce, use and discarded last handling process in cause serious harm for the mankind and ecotope, be unfavorable for the Sustainable development of human society.In recent years, exploitation piezoelectric ceramics system lead-free, superior performance is subjected to the particularly pay attention to day by day of America and Europe, Japan, Korea S and China of countries in the world.
The unleaded base piezoelectric ceramic system of broad research has four classes at present: bismuth laminated leadless piezoelectric ceramic, BaTiO
3Based leadless piezoelectric ceramics, Bi
0.5Na
0.5TiO
3Based leadless piezoelectric ceramics and base metal niobate leadless piezoelectric ceramics.Bismuth laminated leadless piezoelectric ceramic Curie temperature height, anisotropy is big, but piezoelectric activity is low; BaTiO
3The base piezoelectric ceramic Curie temperature is 120 ℃ only, and piezoelectric property is medium; Bi
0.5Na
0.5TiO
3It is strong and be easy to modification and improve piezoelectric property that based leadless piezoelectric ceramics has piezoelectricity, but near second phase transformation 210 ℃ causes the umpolarization temperature to be lower than 210 ℃, often follows the serious reduction of umpolarization temperature when modification improves piezoelectric property; The base metal niobate leadless piezoelectric ceramics is difficult to obtain fine and close pottery by the traditional ceramics technology of preparing, becomes leadless piezoelectric ceramics research focus but it has the Curie temperature up to 420 ℃.
K
1-xNa
xNbO
3Be ferroelectrics KNbO
3With antiferroelectric NaNbO
3Solid solution and the ABO that forms
3The perovskite typed ferroelectrics has that ferroelectricity is strong, Curie temperature is high and advantage such as electromechanical coupling factor is big.But as mentioned above, traditional ceramics technology can not make fine and close high performance K
1-xNa
xNbO
3Document 1 (J.Am.Ceram.Soc.42 (9), 438 (1959)) has provided the K of traditional ceramics prepared
0.5Na
0.5NbO
3Pottery, d
33=80pC/N, k
p=0.36, T
c=420 ℃, ρ=4.25g/cm
3Document 2 (J.Am.Ceram.Soc.45 (5), 209 (1962)) has provided hot pressed K
0.5Na
0.5NbO
3Pottery, d
33=160pC/N, k
p=0.45, ρ=4.46g/cm
3It is K that document 3 (Appl.Phys.Lett.85,4121 (2004)) has provided composition formula
0.5Na
0.5NbO
3-LiNbO
3The leadless piezoelectric ceramics system, d
33=230pC/N, k
p=44%; It is K that document 4 (Mater.Lett.59,241 (2005)) has provided composition formula
0.5Na
0.5NbO
3-LiTaO
3The leadless piezoelectric ceramics system, d
33=200pC/N, k
p=0.36%; Document 5 (piezoelectricity and acousto-optic, Vol.28, No.1, p60) having provided composition formula is K
0.5Na
0.5NbO
3-LiTaO
3The leadless piezoelectric ceramics system, d
33=134pC/N, k
p=33%.Make fine and close high performance columbate leadless piezoelectric ceramic composition as traditional ceramics manufacturing process how and become the problem that present stage need solve.
Summary of the invention
The object of the present invention is to provide a kind of sodium potassium niobate barium zirconate titanate series lead-free piezoelectric ceramic composition, to solve the problems referred to above that prior art exists.Composition provided by the present invention has overcome the inherent defective of existing lead base piezoelectric ceramics system own, and has improved existing base metal niobate leadless piezoelectric ceramics performance.Such lead-free piezoelectric ceramic composition adopts the traditional ceramics prepared, and it is good to have compactness, and piezoelectric property is good, the Curie temperature height, and Heat stability is good has practicality.
Sodium potassium niobate barium zirconate titanate series lead-free piezoelectric ceramic composition provided by the present invention comprises perovskite typed piezoelectrics K
1-xNa
xNbO
3With strong ferroelectrics Ba (Ti
1-yZr
y) O
3According to K
1-xNa
xNbO
3Inherent characteristics own and the accurate homotype phase boundary theory of lead base pottery, the present invention is to ABO
3The perovskite typed piezoelectrics K of structure
1-xNa
xNbO
3The strong ferroelectrics Ba (Ti of middle introducing
1-yZr
y) O
3, reduce K
1-xNa
xNbO
3Four directions-quadrature transformation temperature near room temperature and form the two-phase coexistent district, formed a kind of novel perovskite structure lead-free piezoceramic material.
Ceramic composition provided by the present invention can be used general formula (1-z) (K
1-xNa
x) NbO
3-zBa (Ti
1-yZr
y) O
3Represent that x, y, z represent the atomicity that respective element is shared, i.e. atomic percent, 0＜x in the formula＜1,0＜y＜1,0＜z≤0.1.
In addition, can also further contain one or more oxide compounds in the sodium potassium niobate barium zirconate titanate series lead-free piezoelectric ceramic composition of the present invention, then the general formula of composition is (1-z) (K
1-xNa
x) NbO
3-zBa (Ti
1-yZr
y) O
3((100-a) mol%)+M
αO
β(amol%), M in formula
αO
βExpression oxide compound, α and β are represented the atomicity of corresponding element M and oxygen in the relevant oxide compound respectively, and amol% accounts for the overall mol ratio of composition, wherein 0＜a≤3 for this oxide compound.M is that+1 valency is to+6 valencys, oxygen is-divalent, M is the element that can form solid-oxide with oxygen, and it includes but not limited to the element of at least a Na of being selected from, K, Li, Ni, Zn, Cr, Co, Nb, Ta, Al, Cu, Fe, Ce, Pr, Nd, Sm, Gd, Dy, Er, Yb, In, Y, Sc, La, Ho, Lu, Sn, Sb, Mn, Ca, Ba, Sr, Mg, Si, Bi and Ag.Preferred M is one or more elements among Mn, Cu, the Bi.
The piezoceramic material that the present invention proposes can also be added oxide compound (being base-material+hotchpotch) to be made up of the base-material that the front general formula is represented, makes some optimizing performance parameters.Can be expressed as with general formula: (1-z) (K
1-xNa
x) NbO
3-zBa (Ti
1-yZr
y) O
3+ aM
αO
β(mol%), M in formula
αO
βThe expression hotchpotch, the shared proportion of hotchpotch is 0-3mol%.M
αO
βBe one or more doping oxides, M is for+1-+6 valency and can form the element of solid-oxide with oxygen, as etc., α and β represent the atomicity of corresponding element M and oxygen in the relevant oxide compound respectively.
Sodium potassium niobate barium zirconate titanate series lead-free piezoelectric ceramic composition of the present invention has good piezoelectric property and high Curie temperature, through material properties test, and piezoelectric constant d
33Can reach more than 230 pC/N electromechanical coupling factor k
pCan reach more than 0.48 electromechanical coupling factor k
tCan reach more than 47% Curie temperature T
cBe 233-424 ℃.The advantage of composition provided by the invention is: compactness is good; Piezoelectric property is good; The Curie temperature height; The piezoelectric property Heat stability is good; Stable preparation process adopts the conventional piezoelectric ceramics processing to obtain; Sintering temperature is low, is about 1090-1150 ℃.By further containing oxide compound, some performance perameters of this lead-free piezoelectric ceramic composition are optimized.
Description of drawings
Fig. 1 is the 0.94 (K that the present invention records
0.5Na
0.5) NbO
3-0.06Ba (Ti
0.95Zr
0.05) O
3(99mol%)+MnO
2(1mol%) leadless piezoelectric ceramics is at 1kHz, the specific inductivity of 10kHz and 100kHz (ε)-temperature (T) curve;
Fig. 2 is the 0.94 (K that the present invention records
0.5Na
0.5) NbO
3-0.06Ba (Ti
0.95Zr
0.05) O
3((100-a) mol%)+MnO
2(a mol%) leadless piezoelectric ceramics ferroelectric hysteresis loop (a=0.25,0.5 and 0.75) at room temperature;
Fig. 3 is the 0.94 (K that the present invention records
0.5Na
0.5) NbO
3-0.06Ba (Ti
0.95Zr
0.05) O
3(99mol%)+MnO
2(1mol%) leadless piezoelectric ceramics is at 1 hour piezoelectric constant d of each selected temperature annealing
33Value.
Fig. 4 is the 0.94 (K that the present invention records
0.5Na
0.5) NbO
3-0.06Ba (Ti
0.95Zr
0.05) O
3(100-amol%)+MnO
2(amol%) MnO in the pottery
2Doping to the influence of density (ρ).
Embodiment
Below will describe the present invention by embodiment, these embodiment are property illustrative purposes presented for purpose of illustration just, and is not to be used to limit the present invention.
Preparing general formula of the present invention is (1-z) (K
1-xNa
x) NbO
3-zBa (Ti
1-yZr
y) O
3Leadless piezoelectric ceramics can adopt technical pure or chemical pure Na
2CO
3, K
2CO
3, Nb
2O
5, BaCO
3, TiO
2, ZrO
2Be raw material, make according to conventional preparation method.For example, a kind of method wherein is the stoichiometric ratio raw materials weighing according to general formula, behind abundant ball milling mixing, pack in the alumina crucible, carry out pre-burning at 800-900 ℃, soaking time is 6 hours, adding additives, moulding, plastic removal again are at last at 1090-1150 ℃ of following sintering 2-6 hour.Ceramic plate behind the sintering is by last silver electrode, and in 150-200 ℃ silicone oil, polarization is 30-40 minute under the voltage of 5-6kV/mm.
Preparing general formula of the present invention is (1-z) (K
1-xNa
x) NbO
3-zBa (Ti
1-yZr
y) O
3((100-a) mol%)+M
αO
βA kind of method of leadless piezoelectric ceramics (amol%) is to adopt technical pure or chemical pure Na
2CO
3, K
2CO
3, Nb
2O
5, BaCO
3, TiO
2, ZrO
2Be raw material, by the stoichiometric ratio raw materials weighing of its general formula, behind abundant ball milling mixing, in the alumina crucible of packing into, carry out pre-burning at 800-900 ℃, soaking time is 6 hours.Add the pure or chemical pure M of appropriate amount of industrial in the pre-burning synthetic powder
αO
βProperty-modifying additive, levigate through ball milling again, thorough mixing, adding additives, moulding, plastic removal are at last at 1090-1150 ℃ of following sintering 2-6 hour.Ceramic plate behind the sintering is by last silver electrode, and in 150-200 ℃ silicone oil, polarization is 30-40 minute under the voltage of 5-6kV/mm.
The prescription of Zhi Bei leadless piezoelectric ceramics and performance index are as follows according to the method described above:
Embodiment 1:
Prescription: 0.94 (K
0.5Na
0.5) NbO
3-0.06Ba (Ti
0.95Zr
0.05) O
3
Performance:
d
33(pC/N) ε
33/ε
0 k
p(％) k
t(％) Tc(℃)
109 1094 21.2 25.6 314
Embodiment 2:
Prescription:
0.96(K
0.5Na
0.5)NbO
3-0.04Ba(Ti
0.95Zr
0.05)O
3(99mol％)+MnO
2(1mol％)
Performance:
d
33(pC/N) ε
33/ε
0 k
p(％) k
t(％) T
c(℃)
120 861 39.5 41.0 352
Embodiment 3:
Prescription:
0.93(K
0.5Na
0.5)NbO
3-0.07Ba(Ti
0.95Zr
0.05)O
3(99mol％)+MnO
2(1mol％)
Performance:
d
33(pC/N) ε
33/ε
0 k
p(％) k
t(％) T
c(℃)
179 1157 39.5 41.9 291
Embodiment 4:
Prescription:
0.94(K
0.5Na
0.5)NbO
3-0.06Ba(Ti
0.95Zr
0.05)O
3(99mol％)+MnO
2(1mol％)
Performance:
d
33(pC/N) ε
33/ε
0 k
p(％) k
t(％) T
c(℃)
234 1191 48.3 47.8 318
Embodiment 5:
Prescription:
0.94(K
0.5Na
0.5)NbO
3-0.06Ba(Ti
0.95Zr
0.05)O
3(99.5mol％)+MnO
2(0.5mol％)
Performance:
d
33(pC/N) ε
33/ε
0 k
p(％) k
t(％) T
c(℃)
225 1358 47.3 45.3 315
Embodiment 6:
Prescription:
0.94(K
0.5Na
0.5)NbO
3-0.06Ba(Ti
0.95Zr
0.05)O
3(99.5mol％)+CuO(0.5mol％)
Performance:
d
33(pC/N) ε
33/ε
0 k
p(％) k
t(％) T
c(℃)
176 1096 38.7 34.9 313
Embodiment 7:
Prescription:
0.94(K
0.5Na
0.5)NbO
3-0.06Ba(Ti
0.95Zr
0.05)O
3(98.75mol％)+CuO(1.25mol％)
Performance:
d
33(pC/N) ε
33/ε
0 k
p(％) k
t(％) T
c(℃)
180 890 48.8 49.5 315
Embodiment 8:
Prescription:
0.94(K
0.5Na
0.5)NbO
3-0.06Ba(Ti
0.95Zr
0.05)O
3(98.75mol％)+CuO(0.5mol％)+MnO
2(0.75mol％)
Performance:
d
33(pC/N) ε
33/ε
0 k
p(％) k
t(％) T
c(℃)
215 1010 44.5 45.6 320
Embodiment 9:
Prescription:
0.94(K
0.5Na
0.5)NbO
3-0.06Ba(Ti
0.90Zr
0.10)O
3(99.25mol％)+MnO
2(0.25mol％)+CuO(0.5mol％)
Performance:
d
33(pC/N) ε
33/ε
0 k
p(％) k
t(％) T
c(℃)
198 1040 40.6 42.1 308
Embodiment 10:
Prescription:
0.94(K
0.5Na
0.5)NbO
3-0.06Ba(Ti
0.90Zr
0.10)O
3(99.25mol％)+MnO
2(0.25mol％)+Bi
2O
3(0.5mol％)
Performance:
d
33(pC/N) ε
33/ε
0 k
p(％) k
t(％) T
c(℃)
160 1230 42.3 43.4 316
Embodiment 11:
Prescription:
0.94(K
0.5Na
0.5)NbO
3-0.06Ba(Ti
0.99Zr
0.01)O
3(99mol％)+CuO(1mol％)
Performance:
d
33(pC/N) ε
33/ε
0 k
p(％) k
t(％) T
c(℃)
187 1145 42.7 47.5 314
Embodiment 12:
Prescription:
0.90(K
0.5Na
0.5)NbO
3-0.10Ba(Ti
0.95Zr
0.05)O
3(99.50mol％)+CuO(0.50mol％)
Performance:
d
33(pC/N) ε
33/ε
0 k
p(％) k
t(％) T
c(℃)
79 1043 20.3 30.8 186
Claims (3)
1. sodium potassium niobate barium zirconate titanate series lead-free piezoelectric ceramic composition is characterized in that said composition comprises perovskite typed piezoelectrics K
1-xNa
xNbO
3With strong ferroelectrics Ba (Ti
1-yZr
y) O
3, wherein said composition is by general formula (1-z) (K
1-xNa
x) NbO
3-zBa (Ti
1-yZr
y) O
3Represent 0＜x in the formula＜1,0＜y＜1,0＜z≤0.1.
2. lead-free piezoceramic material composition as claimed in claim 1 is characterized in that described composition also contains one or more oxide compounds, and the general formula of composition is (1-z) (K
1-xNa
x) NbO
3-zBa (Ti
1-yZr
y) O
3((100-a) mol%)+M
αO
β(amol%), M in formula
αO
βThe expression oxide compound, α and β represent the atomicity of corresponding element M and oxygen in the relevant oxide compound respectively, amol% accounts for the overall mol ratio of composition for this oxide compound, 0＜a≤3 wherein, M for+1 valency to+6 valencys and can form the element of solid-oxide with oxygen, it is selected from least a among Na, K, Li, Ni, Zn, Cr, Co, Nb, Ta, Al, Cu, Fe, Ce, Pr, Nd, Sm, Gd, Dy, Er, Yb, In, Y, Sc, La, Ho, Lu, Sn, Sb, Mn, Ca, Ba, Sr, Mg, Si, Bi and the Ag.
3. lead-free piezoceramic material composition as claimed in claim 2 is characterized in that described M is one or more elements among Mn, Cu and the Bi.
Priority Applications (1)
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| CN113185288A (en) * | 2021-04-23 | 2021-07-30 | 桂林理工大学 | Novel sodium niobate-based ceramic material and preparation method thereof |
| CN114988874B (en) * | 2022-06-28 | 2023-06-02 | 聊城大学 | Textured potassium-sodium niobate-based piezoelectric ceramic and preparation method and application thereof |
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