CN100361932C - A bismuth sodium titanate based lead-free piezoelectric ceramic - Google Patents
A bismuth sodium titanate based lead-free piezoelectric ceramic Download PDFInfo
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- 239000000919 ceramic Substances 0.000 title claims abstract description 34
- FSAJRXGMUISOIW-UHFFFAOYSA-N bismuth sodium Chemical compound [Na].[Bi] FSAJRXGMUISOIW-UHFFFAOYSA-N 0.000 title claims abstract description 6
- 239000011734 sodium Substances 0.000 claims abstract description 33
- 239000000203 mixture Substances 0.000 claims abstract description 17
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- 238000000034 method Methods 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052709 silver Inorganic materials 0.000 claims abstract description 4
- 239000004332 silver Substances 0.000 claims abstract description 4
- 238000005303 weighing Methods 0.000 claims abstract 2
- 238000002360 preparation method Methods 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229920002545 silicone oil Polymers 0.000 claims description 3
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 4
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 abstract description 4
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Chemical compound O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 abstract description 2
- 235000017550 sodium carbonate Nutrition 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 229910001868 water Inorganic materials 0.000 abstract description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
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- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 37
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
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- 229910003237 Na0.5Bi0.5TiO3 Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical group [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N CuO Inorganic materials [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910018068 Li 2 O Inorganic materials 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910002367 SrTiO Inorganic materials 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- 229910001420 alkaline earth metal ion Inorganic materials 0.000 description 1
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- 150000002500 ions Chemical class 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- VASIZKWUTCETSD-UHFFFAOYSA-N manganese(II) oxide Inorganic materials [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 description 1
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- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
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- 229910052700 potassium Inorganic materials 0.000 description 1
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Abstract
Description
技术领域technical field
本发明属于压电陶瓷材料，具体涉及一种钙钛矿结构无铅压电陶瓷组合物，适合应用于压电振子和超声换能器等领域。The invention belongs to piezoelectric ceramic materials, in particular to a lead-free piezoelectric ceramic composition with a perovskite structure, which is suitable for use in fields such as piezoelectric vibrators and ultrasonic transducers.
背景技术Background technique
压电陶瓷是一种将变化的力转换为电或将电转换为振动的新型功能陶瓷材料，在信息、航天、激光和生物等技术领域都有广泛应用。但大规模应用的压电陶瓷材料主要是以铅基压电陶瓷为主，其中氧化铅的含量约占原料总量的70％，这就导致在生产、使用和废弃后处理的过程中给人类及生态环境带来严重的危害。因此，近年来，无铅压电陶瓷材料及应用的研究逐渐成为热点。在目前研究的四种无铅压电陶瓷体系中，钛酸铋钠基无铅压电陶瓷被认为是最有前途的无铅压电陶瓷材料。(Bi1/2Na1/2)TiO3是A位由复合离子Bi0.5Na0.5构成的ABO3型钙钛矿铁电体。单纯的(Bi1/2Na1/2)TiO3陶瓷矫顽场较大(73kV/mm)，极化困难，难以实用化。为了解决这个问题，近二十年来，对(Bi1/2Na1/2)TiO3进行了一系列的改性研究来降低矫顽场，提高压电性能。目前常见的改性方法是用+2碱土金属离子部分取代A位复合离子Bi0.5Na0.5或用+1碱金属离子部分取代Na离子。文献1，T Takanaka，K I Maruyama，“Na0.5Bio.5TO3-BaTiO3 system for lead-free piezoelectric ceramic”，Jpn.J.Appl.Phys.，1991，30(9B)：2236-2239；文献2，初宝进，李国荣，江向平等，“Bi1/2Na1/2TiO3-BaTiO3系陶瓷压电性及弛豫相变研究”，无机材料学报，2000，15(5)：815-821.报导了组成为(1-x)(Bi1/2Na1/2)TiO3-xBaTiO3的无铅压电陶瓷体，其压电常数d33＝125pC/N，径向机电耦合系数kp＝0.29。文献3，吴欲功，马晋毅，董向红等，“Na0.5Bi0.5TiO3-SrTiO3无铅压电陶瓷的介电、压电性能”，压电与声光，2000，22(6)：370-372报导了组成为(1-x)(Bi1/2Na1/2)TiO3-xSrTiO3的无铅压电陶瓷体系，其压电常数d33＝100pC/N，厚度机电耦合系数kt＝0.45。文献4，王天宝，王列娥，卢永康，王道鹏，“Na0.5Bi0.5TiO3-K0.5Bio.5TiO3系富钠区陶瓷固溶体的电物理性能研究”，硅酸盐学报，1986，14(1)：14-22报导了组成为(1-x)(Bi1/2Na1/2)TiO3-x(Bi1/2K1/2)TiO3的无铅压电陶瓷体系，其压电常数d33＝100pC/N，径向机电耦合系数kp＝0.28。文献5，D M Lin，D Q Xiao，etal.“Synthesis and piezoelectric properties of lead-free piezoelectric[Bi0.5(Na1-x-yKxLiy)o.5]TiO3 ceramic”.Mater.Lett.，2004，58：615-618报导了组成为[Bi0.5(Na1-x-yKxLiy)0.5]TiO3的无铅压电陶瓷体系，其压电常数d33＝180pC/N，径向机电耦合系数kp＝0.35。Piezoelectric ceramics are a new type of functional ceramic material that converts changing forces into electricity or electricity into vibrations, and is widely used in information, aerospace, laser and biological technology fields. However, the piezoelectric ceramic materials used on a large scale are mainly lead-based piezoelectric ceramics, in which the content of lead oxide accounts for about 70% of the total raw materials, which leads to human hazards in the process of production, use and disposal. and serious harm to the ecological environment. Therefore, in recent years, research on lead-free piezoelectric ceramic materials and their applications has gradually become a hot topic. Among the four lead-free piezoelectric ceramic systems currently studied, bismuth sodium titanate-based lead-free piezoelectric ceramics are considered to be the most promising lead-free piezoelectric ceramic materials. (Bi 1/2 Na 1/2 )TiO 3 is an ABO 3 -type perovskite ferroelectric composed of composite ions Bi 0.5 Na 0.5 at the A site. Simple (Bi 1/2 Na 1/2 )TiO 3 ceramics have a large coercive field (73kV/mm), difficult polarization, and are difficult to put into practical use. In order to solve this problem, in the past two decades, a series of modification studies have been carried out on (Bi 1/2 Na 1/2 )TiO 3 to reduce the coercive field and improve the piezoelectric performance. The current common modification method is to partially replace the A-site compound ion Bi 0.5 Na 0.5 with +2 alkaline earth metal ions or partially replace Na ions with +1 alkali metal ions. Document 1, T Takanaka, K I Maruyama, "Na 0.5 Bio.5 TO 3 -BaTiO 3 system for lead-free piezoelectric ceramic", Jpn.J.Appl.Phys., 1991, 30(9B): 2236-2239;
发明内容Contents of the invention
本发明提供一种钛酸铋钠基无铅压电陶瓷，目的在于进一步降低矫顽场，提高压电性能，以适应产业化应用。The invention provides a bismuth sodium titanate-based lead-free piezoelectric ceramic, the purpose of which is to further reduce the coercive field and improve the piezoelectric performance so as to adapt to industrial application.
本发明的一种钛酸铋钠基无铅压电陶瓷，其基料包括(Bi1/2Na1/2)TiO3、(Bi1/2K1/2)TiO3和KNbO3三种钙钛矿的结构化合物以及烧结助剂MaOb，其摩尔比和成分表达式为：A bismuth sodium titanate-based lead-free piezoelectric ceramic according to the present invention, the base material of which includes (Bi 1/2 Na 1/2 )TiO 3 , (Bi 1/2 K 1/2 )TiO 3 and KNbO 3 The structural compound of perovskite and sintering aid M a O b , the molar ratio and composition expressions are:
(1-x-y)(Bi1/2Na1/2)TiO3-x(Bi1/2K1/2)TiO3-yKNbO3+uMaOb，式中0≤x＜1，0＜y＜0.2，0＜(x+y)＜1，u＝0.3～1.4wt％，MaOb为氧化物Na2O、Li2O、CuO、MnO2、ZnO2、V2O5、B2O3中的一种或多种，a和b为正整数，分别表示相关氧化物中M和氧的原子数；并采用下述方法制备：(1)按所述成分表达式的化学计量比称取分析纯或工业纯的Bi2O3、Na2CO3、(COOK)2·H2O、TiO2、Nb2O5为原料，用纯酒精作为介质球磨；(2)球磨后的粉料烘干后装入氧化铝坩锅800℃～850℃预烧2h，预烧后的粉料掺杂质量比为u的氧化物MaOb作为烧结助剂，经球磨，加粘合剂成型；(3)在1100℃～1180℃之间烧结2～3小时；(4)烧结后的陶瓷片上制备银电极，在30℃～60℃的硅油中，在4～5kV/mm的电压下极化10～15分钟。(1-xy)(Bi 1/2 Na 1/2 )TiO 3 -x(Bi 1/2 K 1/2 )TiO 3 -yKNbO 3 +uM a O b , where 0≤x<1, 0<y<0.2,0<(x+y)<1, u=0.3～1.4wt%, M a O b is oxide Na 2 O, Li 2 O, CuO, MnO 2 , ZnO 2 , V 2 O 5 , One or more of B 2 O 3 , a and b are positive integers, respectively represent the number of atoms of M and oxygen in the relevant oxide; Metering ratio Weigh analytically or industrially pure Bi 2 O 3 , Na 2 CO 3 , (COOK) 2 ·H 2 O, TiO 2 , Nb 2 O 5 as raw materials, and use pure alcohol as the medium for ball milling; (2) ball milling After the final powder is dried, it is put into an alumina crucible and pre-fired at 800°C to 850°C for 2 hours. The pre-fired powder is doped with an oxide M a O b with a mass ratio of u as a sintering aid. After ball milling, add Binder molding; (3) Sintering at 1100°C to 1180°C for 2 to 3 hours; (4) Prepare silver electrodes on the sintered ceramic sheet, in silicone oil at 30°C to 60°C, at 4 to 5kV/mm Polarize for 10 to 15 minutes at a certain voltage.
本发明中，室温下，(Bi1/2Na1/2)TiO3是三方结构的铁电体，(Bi1/2K1/2)TiO3是四方结构的铁电体，KNbO3是正交结构的铁电体，将三种结构不同的铁电体固溶在一起，确定它们的准同型相界，可以找到最佳的压电性能。由于(Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3-KNbO3陶瓷在钾含量较高(≥18mol％)的情况下烧结温度范围很窄，添加一种或多种MaOb氧化物，可使得该陶瓷体系在1100℃～1180℃之间调节烧结温度并能获得较好的压电性能。In the present invention, at room temperature, (Bi 1/2 Na 1/2 )TiO 3 is a ferroelectric with a trigonal structure, (Bi 1/2 K 1/2 )TiO 3 is a ferroelectric with a tetragonal structure, and KNbO 3 is a ferroelectric with a tetragonal structure. For ferroelectrics with orthorhombic structure, three ferroelectrics with different structures are dissolved together, and their quasi-isomorphic phase boundaries can be determined to find the best piezoelectric performance. Due to the narrow sintering temperature range of (Bi 1/2 Na 1/2 )TiO 3 -(Bi 1/2 K 1/2 )TiO 3 -KNbO 3 ceramics with high potassium content (≥18mol%), adding One or more kinds of M a O b oxides can make the ceramic system adjust the sintering temperature between 1100°C and 1180°C and obtain better piezoelectric performance.
本发明的三元系无铅压电陶瓷，具有优良的压电性能。经性能测试表明，该体系的压电常数d33可达190pC/N以上，径向机电耦合系数kp可达0.37以上，已经达到实用化的水平，主要应用于压电振子和超声换能器。该陶瓷体系的优点是可以用传统的陶瓷制备工艺制得且工艺稳定，烧结温度在1100℃～1180℃之间，比含铅压电陶瓷的烧结温度要低很多。The ternary system lead-free piezoelectric ceramics of the invention has excellent piezoelectric properties. The performance test shows that the piezoelectric constant d 33 of this system can reach more than 190pC/N, and the radial electromechanical coupling coefficient kp can reach more than 0.37, which has reached the practical level and is mainly used in piezoelectric vibrators and ultrasonic transducers. The advantage of this ceramic system is that it can be produced by traditional ceramic preparation process and the process is stable. The sintering temperature is between 1100°C and 1180°C, which is much lower than that of lead-containing piezoelectric ceramics.
附图说明Description of drawings
图1是本发明无铅压电陶瓷在常温下的电滞回线图。Fig. 1 is a hysteresis loop diagram of the lead-free piezoelectric ceramic of the present invention at room temperature.
具体实施方式Detailed ways
本发明无铅压电陶瓷的配方及性能指标如实施例所示：The formula and performance index of lead-free piezoelectric ceramics of the present invention are as shown in the embodiment:
实施例1：Example 1:
按下述成分表达式的化学计量比(摩尔比)称取分析纯或工业纯的Bi2O3、Na2CO3、(COOK)2·H2O、TiO2、Nb2O5为原料：Weigh analytically pure or industrially pure Bi2O3 , Na2CO3 , (COOK) 2 · H2O , TiO2 , Nb2O5 as raw materials according to the stoichiometric ratio (molar ratio) of the following composition expression :
0.83(Bi1/2Na1/2)TiO3-0.16(Bi1/2K1/2)TiO3-0.01KNbO3 0.83(Bi 1/2 Na 1/2 )TiO 3 -0.16(Bi 1/2 K 1/2 )TiO 3 -0.01KNbO 3
用纯酒精作为介质球磨，烘干后装入氧化铝坩锅800℃～850℃预烧2h，预烧后的粉料加粘合剂成型，在1100℃～1180℃之间烧结2～3小时；烧结后的陶瓷片上两表面制备银电极，在30℃～60℃的硅油中，在4～5kV/mm的电压下极化10～15分钟。Use pure alcohol as the medium ball mill, put it into an alumina crucible after drying for 2 hours at 800℃～850℃ and pre-fire it for 2 hours. Prepare silver electrodes on both surfaces of the sintered ceramic sheet, and polarize for 10 to 15 minutes at a voltage of 4 to 5 kV/mm in silicone oil at 30°C to 60°C.
性能：performance:
d33(pC/N) kp(％) tanδ(％) ε33/ε0 Qm Npd 33 (pC/N) kp(%) tanδ(%) ε 33 /ε 0 Qm Np
152 33 3.2 830 165 2620152 33 3.2 830 165 2620
实施例2：Example 2:
制备方法同实施例1，成分表达式：Preparation method is the same as embodiment 1, composition expression:
0.79(Bi1/2Na1/2)TiO3-0.2(Bi1/2K1/2)TiO3-0.01KNbO3 0.79(Bi 1/2 Na 1/2 )TiO 3 -0.2(Bi 1/2 K 1/2 )TiO 3 -0.01KNbO 3
性能：performance:
d33(pC/N) kp(％) tanδ(％) ε33/ε0 Qm Npd 33 (pC/N) kp(%) tanδ(%) ε 33 /ε 0 Qm Np
182 31 4.0 1350 89 2650182 31 4.0 1350 89 2650
实施例3：Example 3:
制备方法同实施例1，成分表达式：Preparation method is the same as embodiment 1, composition expression:
0.82(Bi1/2Na1/2)TiO3-0.16(Bi1/2K1/2)TiO3-0.02KNbO3 0.82(Bi 1/2 Na 1/2 )TiO 3 -0.16(Bi 1/2 K 1/2 )TiO 3 -0.02KNbO 3
性能：performance:
d33(pC/N) kp(％) tanδ(％) ε33/ε0 Qm Npd 33 (pC/N) kp(%) tanδ(%) ε 33 /ε 0 Qm Np
192 36 5.1 1430 97 2660192 36 5.1 1430 97 2660
实施例4：Example 4:
制备方法同实施例1，成分表达式：Preparation method is the same as embodiment 1, composition expression:
0.87(Bi1/2Na1/2)TiO3-0.1(Bi1/2K1/2)TiO3-0.03KNbO3 0.87(Bi 1/2 Na 1/2 )TiO 3 -0.1(Bi 1/2 K 1/2 )TiO 3 -0.03KNbO 3
性能：performance:
d33(pC/N) kp(％) tanδ(％) ε33/ε0 Qm Npd 33 (pC/N) kp(%) tanδ(%) ε 33 /ε 0 Qm Np
138 38 5.7 691 30 2715138 38 5.7 691 30 2715
实施例5：Example 5:
制备方法同实施例1，成分表达式：Preparation method is the same as embodiment 1, composition expression:
0.92(Bi1/2Na1/2)TiO3-0.04(Bi1/2K1/2)TiO3-0.04KNbO3 0.92(Bi 1/2 Na 1/2 )TiO 3 -0.04(Bi 1/2 K 1/2 )TiO 3 -0.04KNbO 3
性能：performance:
d33(pC/N) kp(％) tanδ(％) ε33/ε0 Qm Npd 33 (pC/N) kp(%) tanδ(%) ε 33 /ε 0 Qm Np
125 26 2.5 702 197 2725125 26 2.5 702 197 2725
实施例6：Embodiment 6:
制备方法同实施例1，但预烧后的粉料掺杂质量比为0.3％的氧化物MnO2，经球磨，加粘合剂成型后，再烧结，成分表达式：The preparation method is the same as in Example 1, but the pre-calcined powder is doped with 0.3% oxide MnO 2 by mass ratio, ball milled, formed with a binder, and then sintered. The composition expression is:
0.83(Bi1/2Na1/2)TiO3-0.16(Bi1/2K1/2)TiO3-0.01KNbO3+0.3wt％MnO2 0.83(Bi 1/2 Na 1/2 )TiO 3 -0.16(Bi 1/2 K 1/2 )TiO 3 -0.01KNbO 3 +0.3wt%MnO 2
性能：performance:
d33(pC/N) kp(％) tanδ(％) ε33/ε0 Qm Npd 33 (pC/N) kp(%) tanδ(%) ε 33 /ε 0 Qm Np
168 35 2.7 685 256 2745168 35 2.7 685 256 2745
实施例7：Embodiment 7:
制备方法同实施例6，但预烧后的粉料掺杂质量比为1.2％的氧化物CuO，成分表达式：The preparation method is the same as in Example 6, but the mass ratio of the doped powder after pre-calcination is 1.2% oxide CuO, and the composition expression is:
0.82(Bi1/2Na1/2)TiO3-0.16(Bi1/2K1/2)TiO3-0.02KNbO3+1.2wt％CuO0.82(Bi 1/2 Na 1/2 )TiO 3 -0.16(Bi 1/2 K 1/2 )TiO 3 -0.02KNbO 3 +1.2wt%CuO
性能：performance:
d33(pC/N) kp(％) tanδ(％) ε33/ε0 Qm Npd 33 (pC/N) kp(%) tanδ(%) ε 33 /ε 0 Qm Np
183 32 2.1 630 184 2546183 32 2.1 630 184 2546
实施例8：Embodiment 8:
制备方法同实施例6，但预烧后的粉料掺杂质量比为0.3％的氧化物ZnO2，成分表达式：The preparation method is the same as that in Example 6, but the calcined powder is doped with 0.3% oxide ZnO 2 by mass ratio, and the composition expression is:
0.83(Bi1/2Na1/2)TiO3-0.16(Bi1/2K1/2)TiO3-0.01KNbO3+0.3wt％ZnO2 0.83(Bi 1/2 Na 1/2 )TiO 3 -0.16(Bi 1/2 K 1/2 )TiO 3 -0.01KNbO 3 +0.3wt%ZnO 2
性能：performance:
d33(pC/N) kp(％) tanδ(％) ε33/ε0 Qm Npd 33 (pC/N) kp(%) tanδ(%) ε 33 /ε 0 Qm Np
175 32 2.7 685 256 2745175 32 2.7 685 256 2745
实施例9：Embodiment 9:
制备方法同实施例6，但预烧后的粉料掺杂质量比为1.2％的氧化物CuO和质量比为0.2％的氧化物MnO2，成分表达式：The preparation method is the same as in Example 6, but the pre-calcined powder is doped with 1.2% oxide CuO and 0.2% oxide MnO 2 by mass ratio, and the composition expression is:
0.82(Bi1/2Na1/2)TiO3-0.16(Bi1/2K1/2)TiO3-0.02KNbO3+1.2wt％CuO+0.2wt％MnO2 0.82(Bi 1/2 Na 1/2 )TiO 3 -0.16(Bi 1/2 K 1/2 )TiO 3 -0.02KNbO 3 +1.2wt%CuO+0.2wt%MnO 2
性能：performance:
d33(pC/N) kp(％) tanδ(％) ε33/ε0 Qm Npd 33 (pC/N) kp(%) tanδ(%) ε 33 /ε 0 Qm Np
199 37 2.9 724 178 2632199 37 2.9 724 178 2632
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| CN85100426A (en) * | 1985-04-01 | 1986-08-13 | 中国科学院上海硅酸盐研究所 | The piezoceramic material of the ultrasonic usefulness of bismuth sodium potassium titanate series |
| CN1381425A (en) * | 2001-04-18 | 2002-11-27 | 日本特殊陶业株式会社 | Piezoelectric ceramic material |
| CN1197823C (en) * | 2000-11-21 | 2005-04-20 | Tdk株式会社 | Piezoelectric ceramic |
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| CN1197823C (en) * | 2000-11-21 | 2005-04-20 | Tdk株式会社 | Piezoelectric ceramic |
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