KR19990019770A - Piezoelectric ceramic composition - Google Patents
Piezoelectric ceramic composition Download PDFInfo
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- KR19990019770A KR19990019770A KR1019970043207A KR19970043207A KR19990019770A KR 19990019770 A KR19990019770 A KR 19990019770A KR 1019970043207 A KR1019970043207 A KR 1019970043207A KR 19970043207 A KR19970043207 A KR 19970043207A KR 19990019770 A KR19990019770 A KR 19990019770A
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- 239000000203 mixture Substances 0.000 title claims abstract description 26
- 239000000919 ceramic Substances 0.000 title claims abstract description 22
- 238000005245 sintering Methods 0.000 abstract description 18
- 230000008878 coupling Effects 0.000 abstract description 5
- 238000010168 coupling process Methods 0.000 abstract description 5
- 238000005859 coupling reaction Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000011572 manganese Substances 0.000 description 17
- 239000011701 zinc Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 13
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 2
- 229910000480 nickel oxide Inorganic materials 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 229940068984 polyvinyl alcohol Drugs 0.000 description 2
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- HEPLMSKRHVKCAQ-UHFFFAOYSA-N lead nickel Chemical compound [Ni].[Pb] HEPLMSKRHVKCAQ-UHFFFAOYSA-N 0.000 description 1
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- ZBSCCQXBYNSKPV-UHFFFAOYSA-N oxolead;oxomagnesium;2,4,5-trioxa-1$l^{5},3$l^{5}-diniobabicyclo[1.1.1]pentane 1,3-dioxide Chemical compound [Mg]=O.[Pb]=O.[Pb]=O.[Pb]=O.O1[Nb]2(=O)O[Nb]1(=O)O2 ZBSCCQXBYNSKPV-UHFFFAOYSA-N 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/85—Piezoelectric or electrostrictive active materials
- H10N30/853—Ceramic compositions
- H10N30/8548—Lead-based oxides
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
본발명은 [xPb(Zn1/3Nb2/3)O3- yPb(Mn1/3Nb2/3)O3- 0.4PbTiO3- 0.4PbZrO3] + kCdO(0.05≤x≤0.15mol%, 0.05≤y≤0.15mol%, 0.2≤k≤1.0wt%, x+y=0.2mol%)로 조성된 압전 자기 조성물에 관한 것으로서, 상기 압전 자기 조성물의 기계적 품질계수(Qm)및 전기기계 결합계수(Kp)가 높고, 낮은 소결온도를 갖으며, 압전 트랜스포머, 압전진동자 등의 제조 조건을 만족하여 압전부품의 재료로 사용되는 압전 자기 조성물에 관한 것이다.The invention [xPb (Zn 1/3 Nb 2/3) O 3 - yPb (Mn 1/3 Nb 2/3) O 3 - 0.4PbTiO 3 - 0.4PbZrO 3] + kCdO (0.05≤x≤0.15mol% , 0.05≤y≤0.15mol%, 0.2≤k≤1.0wt%, x + y = 0.2mol%), the mechanical quality factor (Qm) and electromechanical coupling of the piezoelectric ceramic composition The present invention relates to a piezoelectric ceramic composition having a high coefficient Kp, a low sintering temperature, and satisfying the manufacturing conditions of piezoelectric transformers, piezoelectric vibrators and the like and used as a material for piezoelectric parts.
Description
본 발명은 압전 자기 조성물에 관한 것으로서, 특히 압전 트랜스포머, 압전 진동자, 착화소자와 같은 압전 부품의 재료로 사용되는 압전 자기 조성물에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to piezoelectric ceramic compositions, and more particularly to piezoelectric ceramic compositions used as materials for piezoelectric components such as piezoelectric transformers, piezoelectric vibrators, and ignition elements.
종래의 압전 자기 조성물은 티탄산지르콘산연(PZT)에 마그네슘네오븀산납(Pb(Mg1/3Nb2/3)O3), 니켈네오븀산납(Pb(Ni1/3Nb2/3)O3) 아연네오븀산납(Pb(Zn1/3Nb2/3)O3), 망간네오븀산납(Pb(Mn1/3Nb2/3)O3)과 같은 첨가물을 더하여 제작하거나, 상기 첨가물의 납(Pb) 성분을 Sr, Ba, La으로 치환하여 조성되었다.Conventional piezoelectric ceramic compositions include lead magnesium niobate (Pb (Mg 1/3 Nb 2/3 ) O 3 ) and lead nickel neobate (Pb (Ni 1/3 Nb 2/3 ) O in lead zirconate titanate (PZT). 3 ) produced by adding an additive such as lead zinc neobate (Pb (Zn 1/3 Nb 2/3 ) O 3 ), lead manganese neobate (Pb (Mn 1/3 Nb 2/3 ) O 3 ), or The lead (Pb) component of the additive was formed by substituting Sr, Ba, and La.
그러나 상기와 같이 조성된 종래의 압전 자기 조성물은 전기기계결합계수(Kp)는 높은 반면, 기계적 품질 계수(Qm)가 낮고, 높은 소결온도를 갖고 있으므로 산화납(PbO)이 휘발되어 공해를 유발시키는 문제점이 있었다.However, the conventional piezoelectric ceramic composition prepared as described above has high electromechanical coupling coefficient (Kp), low mechanical quality coefficient (Qm), and high sintering temperature, so that lead oxide (PbO) is volatilized to cause pollution There was a problem.
본 발명은 상기한 바와 같은 문제점을 해결하기 위하여 안출된 것으로서, Pb(Zn1/3Nb2/3)O3- Pb(Mn1/3Nb2/3)O3- PbTiO3- PbZrO3의 기본 조성물에 카드뮴(Cd)을 첨가시켜, 전기기계 결합계수(Kp) 및 기계적 품질계수(Qm)가 크고, 낮은 소결온도를 갖는 압전 자기 조성물을 제조함에 그 목적이 있다.The present invention has been made to solve the above problems, Pb (Zn 1/3 Nb 2/3 ) O 3 -Pb (Mn 1/3 Nb 2/3 ) O 3 -PbTiO 3 -PbZrO 3 By adding cadmium (Cd) to the base composition, the purpose is to produce a piezoelectric ceramic composition having a high electromechanical coupling coefficient (Kp) and a mechanical quality coefficient (Qm) and a low sintering temperature.
본 발명은 [xPb(Zn1/3Nb2/3)O3- yPb(Mn1/3Nb2/3)O3- 0.4PbTiO3- 0.4PbZrO3]+ kCdO (0.05≤x≤0.15mol%, 0.05≤y≤0.15mol%, 0.2≤k≤1.0wt%, x+y=0.2mol%)로 구성된 압전 자기 조성물에 관한 것이다.The present invention relates to [xPb (Zn 1/3 Nb 2/3 ) O 3 -yPb (Mn 1/3 Nb 2/3 ) O 3 -0.4PbTiO 3 -0.4PbZrO 3 ] + kCdO (0.05≤x≤0.15mol% , 0.05 ≦ y ≦ 0.15mol%, 0.2 ≦ k ≦ 1.0wt%, x + y = 0.2mol%).
표1을 참조하여 본 발명의 실시예를 설명하면 다음과 같다. 산화납(PbO), 산화티탄(TiO2), 산화지르코늄(ZrO2), 산화니켈(NiO), 산화네오븀(Nb2O5), 산화망간(MnO2), 산화철(Fe2O3), 산화크롬(Cr2O3)를 평량하여 20시간 습식혼합을 시킨 후 건조시킨다. 건조된 재료를 800∼900℃에서 2시간 하소하여 분쇄시키고PVA(Poly Vinyl Alcohol)결합제를 첨가하여 직경 24㎜, 두께 1.5㎜의 원판형 펠렛(Pellet)을 성형한 다음 소결온도 1,100∼1,200℃의 공기 중에서 2시간 소결시킨다. 이와 같이 소결된 소체의 양면에 은(Ag) 전극을 형성시키고, 실리콘오일중에서 2∼4kV㎜의 직류전압을 인가한 다음 밀도, 유전상수(Er), 기계적 품질계수(Qm), 전기기계 결합계수(Kp)를 측정한 결과, 밀도는 7.73∼7.89g/㎤, 유전상수는 930∼1,700, 기계적 품질계수(Qm)는 890∼1,520, 전기기계 결합계수(Kp)는 38.7∼63.3인 특성을 나타냈다.Referring to Table 1, an embodiment of the present invention will be described. Lead Oxide (PbO), Titanium Oxide (TiO 2 ), Zirconium Oxide (ZrO 2 ), Nickel Oxide (NiO), Neobium Oxide (Nb 2 O 5 ), Manganese Oxide (MnO 2 ), Iron Oxide (Fe 2 O 3 ) After chromium oxide (Cr 2 O 3 ) was weighed and wet mixed for 20 hours, dried. The dried material was calcined at 800-900 ° C. for 2 hours to grind, and a Pellet pellet having a diameter of 24 mm and a thickness of 1.5 mm was formed by adding a PVA (Poly Vinyl Alcohol) binder, followed by sintering at a temperature of 1,100 to 1,200 ° C. Sinter in air for 2 hours. Silver (Ag) electrodes are formed on both sides of the sintered body and a DC voltage of 2-4 kV mm is applied in silicon oil, and then density, dielectric constant (Er), mechanical quality factor (Qm) and electromechanical coupling coefficients are applied. As a result of measuring (Kp), the density was 7.73-7.89g / cm3, dielectric constant was 930-1,700, mechanical quality factor (Qm) was 890-1,520, and electromechanical coefficient (Kp) was 38.7 ~ 63.3. .
실시예 1Example 1
[xPb(Zn1/3Nb2/3)O3- yPb(Mn1/3Nb2/3)O3- 0.4PbTiO3- 0.4PbZrO3]+ kCdO (x=0.05mol%, y=0.15mol%, k=0.2wt%)로 조성된 압전 자기 조성물을 소결온도 1,000℃에서 상기의 방법으로 제조한 결과, 밀도는 7.83g/㎤, 유전상수(Er)는 930, 기계적 품질계수(Qm)는 1,430, 전기기계 결합계수(Kp)는 41.3인 특성을 나타냈다. [xPb (Zn 1/3 Nb 2/3) O 3 - yPb (Mn 1/3 Nb 2/3) O 3 - 0.4PbTiO 3 - 0.4PbZrO 3] + kCdO (x = 0.05mol%, y = 0.15mol %, k = 0.2wt%), the piezoelectric ceramic composition prepared by the above method at the sintering temperature of 1,000 ℃ as a result, the density is 7.83g / cm3, dielectric constant (Er) is 930, mechanical quality factor (Qm) is 1,430, the electromechanical coefficient (Kp) showed a characteristic of 41.3.
실시예 2Example 2
[xPb(Zn1/3Nb2/3)O3- yPb(Mn1/3Nb2/3)O3- 0.4PbTiO3- 0.4PbZrO3]+ kCdO (x=0.05mol%, y=0.15mol%, k=0.2wt%)로 조성된 압전 자기 조성물을 소결온도 1,100℃에서 상기의 방법으로 제조한 결과, 밀도는 7.87g/㎤, 유전상수(Er)는 975, 기계적 품질계수(Qm)는 1,450, 전기기계 결합계수(Kp)는 42.7인 특성을 나타냈다. [xPb (Zn 1/3 Nb 2/3) O 3 - yPb (Mn 1/3 Nb 2/3) O 3 - 0.4PbTiO 3 - 0.4PbZrO 3] + kCdO (x = 0.05mol%, y = 0.15mol %, k = 0.2wt%), the piezoelectric ceramic composition was prepared by the above method at the sintering temperature of 1,100 ° C. As a result, the density was 7.87 g / cm 3, the dielectric constant (Er) was 975, and the mechanical quality factor (Qm) was 1,450 and the electromechanical coefficient (Kp) showed a characteristic of 42.7.
실시예 3Example 3
[xPb(Zn1/3Nb2/3)O3- yPb(Mn1/3Nb2/3)O3- 0.4PbTiO3- 0.4PbZrO3]+ kCdO (x=0.05mol%, y=0.15mol%, k=0.5wt%)로 조성된 압전 자기 조성물을 소결온도 1,000℃에서 상기의 방법으로 제조한 결과, 밀도는 7.85g/㎤, 유전상수(Er)는 945, 기계적 품질계수(Qm)는 1,520, 전기기계 결합계수(Kp)는 42.5인 특성을 나타냈다. [xPb (Zn 1/3 Nb 2/3) O 3 - yPb (Mn 1/3 Nb 2/3) O 3 - 0.4PbTiO 3 - 0.4PbZrO 3] + kCdO (x = 0.05mol%, y = 0.15mol %, k = 0.5 wt%), the piezoelectric ceramic composition was prepared by the above method at the sintering temperature of 1,000 DEG C. As a result, the density was 7.85 g / cm3, the dielectric constant (Er) was 945, and the mechanical quality factor (Qm) was 1,520, the electromechanical coefficient (Kp) showed a characteristic of 42.5.
실시예 4Example 4
[xPb(Zn1/3Nb2/3)O3- yPb(Mn1/3Nb2/3)O3- 0.4PbTiO3- 0.4PbZrO3]+ kCdO (x=0.05mol%, y=0.15mol%, k=0.5wt%)로 조성된 압전 자기 조성물을 소결온도 1,100℃에서 상기의 방법으로 제조한 결과, 밀도는 7.88g/㎤, 유전상수(Er)는 1,020 기계적 품질계수(Qm)는 1,500, 전기기계 결합계수(Kp)는 40.8인 특성을 나타냈다. [xPb (Zn 1/3 Nb 2/3) O 3 - yPb (Mn 1/3 Nb 2/3) O 3 - 0.4PbTiO 3 - 0.4PbZrO 3] + kCdO (x = 0.05mol%, y = 0.15mol %, k = 0.5wt%), the piezoelectric ceramic composition prepared by the above method at the sintering temperature of 1,100 ℃, the density is 7.88g / ㎠, the dielectric constant (Er) is 1,020 mechanical quality factor (Qm) is 1,500 The electromechanical coefficient (Kp) was 40.8.
실시예 5Example 5
[xPb(Zn1/3Nb2/3)O3- yPb(Mn1/3Nb2/3)O3- 0.4PbTiO3- 0.4PbZrO3]+ kCdO (x=0.05mol%, y=0.15mol%, k=1.0wt%)로 조성된 압전 자기 조성물을 소결온도 1,000℃에서 상기의 방법으로 제조한 결과, 밀도는 7.80g/㎤, 유전상수(Er)는 1,150, 기계적 품질계수(Qm)는 1,470, 전기기계 결합계수(Kp)는 38.7인 특성을 나타냈다. [xPb (Zn 1/3 Nb 2/3) O 3 - yPb (Mn 1/3 Nb 2/3) O 3 - 0.4PbTiO 3 - 0.4PbZrO 3] + kCdO (x = 0.05mol%, y = 0.15mol %, k = 1.0wt%), the piezoelectric ceramic composition was prepared by the above method at the sintering temperature of 1,000 ℃, the density was 7.80g / cm3, dielectric constant (Er) is 1,150, mechanical quality factor (Qm) 1,470, the electromechanical coefficient (Kp) showed a characteristic of 38.7.
실시예 6Example 6
[xPb(Zn1/3Nb2/3)O3- yPb(Mn1/3Nb2/3)O3- 0.4PbTiO3- 0.4PbZrO3]+ kCdO (x=0.10mol%, y=0.10mol%, k=0.2wt%)로 조성된 압전 자기 조성물을 소결온도 1,000℃에서 상기의 방법으로 제조한 결과, 밀도는 7.81g/㎤, 유전상수(Er)는 1,270, 기계적 품질계수(Qm)는 1,210, 전기기계 결합계수(Kp)는 62.1인 특성을 나타냈다. [xPb (Zn 1/3 Nb 2/3) O 3 - yPb (Mn 1/3 Nb 2/3) O 3 - 0.4PbTiO 3 - 0.4PbZrO 3] + kCdO (x = 0.10mol%, y = 0.10mol %, k = 0.2wt%), the piezoelectric ceramic composition prepared by the above method at the sintering temperature of 1,000 ℃ as a result, the density is 7.81g / cm3, dielectric constant (Er) is 1,270, mechanical quality factor (Qm) is 1,210 and the electromechanical coefficient (Kp) showed 62.1.
실시예 7Example 7
[xPb(Zn1/3Nb2/3)O3- yPb(Mn1/3Nb2/3)O3- 0.4PbTiO3- 0.4PbZrO3]+ kCdO (x=0.10mol%, y=0.10mol%, k=0.2wt%)로 조성된 압전 자기 조성물을 소결온도 1,100℃에서 상기의 방법으로 제조한 결과, 밀도는 7.85g/㎤, 유전상수(Er)는 1,245, 기계적 품질계수(Qm)는 1,250, 전기기계 결합계수(Kp)는 63.3인 특성을 나타냈다. [xPb (Zn 1/3 Nb 2/3) O 3 - yPb (Mn 1/3 Nb 2/3) O 3 - 0.4PbTiO 3 - 0.4PbZrO 3] + kCdO (x = 0.10mol%, y = 0.10mol %, k = 0.2wt%), the piezoelectric ceramic composition was prepared by the above method at the sintering temperature of 1,100 ° C. As a result, the density was 7.85 g / cm 3, the dielectric constant (Er) was 1,245, and the mechanical quality factor (Qm) was 1,250 and the electromechanical coefficient (Kp) showed a characteristic of 63.3.
실시예 8Example 8
[xPb(Zn1/3Nb2/3)O3- yPb(Mn1/3Nb2/3)O3- 0.4PbTiO3- 0.4PbZrO3]+ kCdO (x=0.10mol%, y=0.10mol%, k=0.5wt%)로 조성된 압전 자기 조성물을 소결온도 1,000℃에서 상기의 방법으로 제조한 결과, 밀도는 7.84g/㎤, 유전상수(Er)는 1,400, 기계적 품질계수(Qm)는 1,200, 전기기계 결합계수(Kp)는 60.5인 특성을 나타냈다. [xPb (Zn 1/3 Nb 2/3) O 3 - yPb (Mn 1/3 Nb 2/3) O 3 - 0.4PbTiO 3 - 0.4PbZrO 3] + kCdO (x = 0.10mol%, y = 0.10mol %, k = 0.5wt%), the piezoelectric ceramic composition was prepared by the above method at the sintering temperature of 1,000 ℃, the density was 7.84g / cm3, the dielectric constant (Er) is 1,400, the mechanical quality factor (Qm) 1,200 and the electromechanical coefficient (Kp) showed a characteristic of 60.5.
실시예 9Example 9
[xPb(Zn1/3Nb2/3)O3- yPb(Mn1/3Nb2/3)O3- 0.4PbTiO3- 0.4PbZrO3]+ kCdO (x=0.10mol%, y=0.10mol%, k=1.0wt%)로 조성된 압전 자기 조성물을 소결온도 1,000℃에서 상기의 방법으로 제조한 결과, 밀도는 7.89g/㎤, 유전상수(Er)는 1,360, 기계적 품질계수(Qm)는 1,230, 전기기계 결합계수(Kp)는 51.3인 특성을 나타냈다. [xPb (Zn 1/3 Nb 2/3) O 3 - yPb (Mn 1/3 Nb 2/3) O 3 - 0.4PbTiO 3 - 0.4PbZrO 3] + kCdO (x = 0.10mol%, y = 0.10mol %, k = 1.0wt%), the piezoelectric ceramic composition was prepared by the above method at the sintering temperature of 1,000 ℃, the density was 7.89g / cm3, the dielectric constant (Er) is 1,360, the mechanical quality factor (Qm) is 1,230, the electromechanical coefficient (Kp) showed a characteristic of 51.3.
실시예 10Example 10
[xPb(Zn1/3Nb2/3)O3- yPb(Mn1/3Nb2/3)O3- 0.4PbTiO3- 0.4PbZrO3]+ kCdO (x=0.15mol%, y=0.05mol%, k=0.2wt%)로 조성된 압전 자기 조성물을 소결온도 1,000℃에서 상기의 방법으로 제조한 결과, 밀도는 7.73g/㎤, 유전상수(Er)는 1,405, 기계적 품질계수(Qm)는 980, 전기기계 결합계수(Kp)는 50.7인 특성을 나타냈다. [xPb (Zn 1/3 Nb 2/3) O 3 - yPb (Mn 1/3 Nb 2/3) O 3 - 0.4PbTiO 3 - 0.4PbZrO 3] + kCdO (x = 0.15mol%, y = 0.05mol %, k = 0.2wt%), the piezoelectric ceramic composition was prepared by the above method at the sintering temperature of 1,000 ° C. As a result, the density was 7.73 g / cm 3, the dielectric constant (Er) was 1,405, and the mechanical quality factor (Qm) was 980, the electromechanical coefficient (Kp) showed a characteristic of 50.7.
실시예 11Example 11
[xPb(Zn1/3Nb2/3)O3- yPb(Mn1/3Nb2/3)O3- 0.4PbTiO3- 0.4PbZrO3]+ kCdO (x=0.15mol%, y=0.05mol%, k=0.2wt%)로 조성된 압전 자기 조성물을 소결온도 1,100℃에서 상기의 방법으로 제조한 결과, 밀도는 7.81g/㎤, 유전상수(Er)는 1,400, 기계적 품질계수(Qm)는 920, 전기기계 결합계수(Kp)는 52.2인 특성을 나타냈다. [xPb (Zn 1/3 Nb 2/3) O 3 - yPb (Mn 1/3 Nb 2/3) O 3 - 0.4PbTiO 3 - 0.4PbZrO 3] + kCdO (x = 0.15mol%, y = 0.05mol %, k = 0.2 wt%), the piezoelectric ceramic composition was prepared by the above method at the sintering temperature of 1,100 ° C. As a result, the density was 7.81 g / cm 3, the dielectric constant (Er) was 1,400, and the mechanical quality factor (Qm) was 920, the electromechanical coefficient (Kp) showed a characteristic of 52.2.
실시예 12Example 12
[xPb(Zn1/3Nb2/3)O3- yPb(Mn1/3Nb2/3)O3- 0.4PbTiO3- 0.4PbZrO3]+ kCdO (x=0.15mol%, y=0.05mol%, k=0.5wt%)로 조성된 압전 자기 조성물을 소결온도 1,000℃에서 상기의 방법으로 제조한 결과, 밀도는 7.84g/㎤, 유전상수(Er)는 1,370, 기계적 품질계수(Qm)는 890, 전기기계 결합계수(Kp)는 53.6인 특성을 나타냈다. [xPb (Zn 1/3 Nb 2/3) O 3 - yPb (Mn 1/3 Nb 2/3) O 3 - 0.4PbTiO 3 - 0.4PbZrO 3] + kCdO (x = 0.15mol%, y = 0.05mol %, k = 0.5 wt%), the piezoelectric ceramic composition prepared by the above method at the sintering temperature of 1,000 ℃ as a result, the density is 7.84g / cm3, dielectric constant (Er) is 1,370, mechanical quality factor (Qm) is 890, the electromechanical coefficient (Kp) showed a characteristic of 53.6.
실시예 13Example 13
[xPb(Zn1/3Nb2/3)O3- yPb(Mn1/3Nb2/3)O3- 0.4PbTiO3- 0.4PbZrO3]+ kCdO (x=0.15mol%, y=0.05mol%, k=1.0wt%)로 조성된 압전 자기 조성물을 소결온도 1,000℃에서 상기의 방법으로 제조한 결과, 밀도는 7.82g/㎤, 유전상수(Er)는 1,700, 기계적 품질계수(Qm)는 1,020, 전기기계 결합계수(Kp)는 48.9인 특성을 나타냈다. [xPb (Zn 1/3 Nb 2/3) O 3 - yPb (Mn 1/3 Nb 2/3) O 3 - 0.4PbTiO 3 - 0.4PbZrO 3] + kCdO (x = 0.15mol%, y = 0.05mol %, k = 1.0 wt%), the piezoelectric ceramic composition prepared by the above method at the sintering temperature of 1,000 ℃ as a result, the density is 7.82g / cm3, dielectric constant (Er) is 1,700, mechanical quality factor (Qm) is 1,020 and the electromechanical coefficient (Kp) showed 48.9.
본 발명에 의한 상기 압전자기 조성물은 기계적 품질계수(Qm)와 전기기계 결합계수(Kp)가 높고, 소결온도가 낮으므로 압전 트랜스포머, 압전 진동자, 착화소자와 같은 고 신뢰성 압전부품을 제조할 수 있으며, 산화납(PbO)의 휘발에 의한 환경오염을 감소시킬 수 있는 효과가 있다.The piezoelectric composition according to the present invention has a high mechanical quality factor (Qm) and an electromechanical coupling coefficient (Kp) and a low sintering temperature, thereby making it possible to manufacture high-reliability piezoelectric parts such as piezoelectric transformers, piezoelectric vibrators, and ignition elements. , It is effective to reduce environmental pollution by volatilization of lead oxide (PbO).
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