JP2012195577A - 圧電材料、圧電素子、液体吐出ヘッド、超音波モータおよび塵埃除去装置 - Google Patents
圧電材料、圧電素子、液体吐出ヘッド、超音波モータおよび塵埃除去装置 Download PDFInfo
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- JP2012195577A JP2012195577A JP2012040154A JP2012040154A JP2012195577A JP 2012195577 A JP2012195577 A JP 2012195577A JP 2012040154 A JP2012040154 A JP 2012040154A JP 2012040154 A JP2012040154 A JP 2012040154A JP 2012195577 A JP2012195577 A JP 2012195577A
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- Prior art keywords
- piezoelectric
- piezoelectric material
- piezoelectric element
- electrode
- copper
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- 239000000463 material Substances 0.000 title claims abstract description 85
- 239000007788 liquid Substances 0.000 title claims description 34
- 239000000428 dust Substances 0.000 title claims description 26
- 229910052802 copper Inorganic materials 0.000 claims abstract description 41
- 239000010949 copper Substances 0.000 claims abstract description 41
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 5
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 5
- 238000009413 insulation Methods 0.000 abstract description 9
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 abstract description 5
- 239000011591 potassium Substances 0.000 abstract description 5
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- UYLYBEXRJGPQSH-UHFFFAOYSA-N sodium;oxido(dioxo)niobium Chemical compound [Na+].[O-][Nb](=O)=O UYLYBEXRJGPQSH-UHFFFAOYSA-N 0.000 description 7
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- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
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- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
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- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
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- 239000011812 mixed powder Substances 0.000 description 2
- -1 niobium ion Chemical class 0.000 description 2
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
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- 238000007088 Archimedes method Methods 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
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- 230000015556 catabolic process Effects 0.000 description 1
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- 238000006731 degradation reaction Methods 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 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
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000009768 microwave sintering Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910000484 niobium oxide Inorganic materials 0.000 description 1
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000009774 resonance method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
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- 230000002269 spontaneous effect Effects 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004627 transmission electron microscopy Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
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Abstract
【解決手段】下記一般式(1)で表わされるペロブスカイト型金属酸化物1molに対して、銅をy×0.05mol%以上y×2mol%以下含むことを特徴とする圧電材料である。一般式(1)(NaxBa1−y)(NbyTi1−y)O3(式中、 0.80≦x≦0.95、0.85≦y≦0.95)
【選択図】図6
Description
一般式(1) (NaxBa1−y)(NbyTi1−y)O3(式中、 0.80≦x≦0.95、0.85≦y≦0.95)
本発明の第三の様態は、前記圧電素子を用いた液体吐出ヘッドである。
本発明の第四の様態は、前記圧電素子を用いた超音波モータである。
本発明の第五の様態は、前記圧電素子を用いた塵埃除去装置である。
一般式(1) (NaxBa1−y)(NbyTi1−y)O3(式中、 0.80≦x≦0.95、0.85≦y≦0.95)
xがy未満であると、銅が結晶格子中に取り込まれ本発明の効果を発揮し易いため、xはy未満であることが好ましい。
ニオブ酸ナトリウムもしくはニオブ酸ナトリウムを成分として含む結晶を焼結する際、ナトリウムが蒸発もしくは拡散して、焼結後の試料組成はニオブに対してナトリウム不足となることがある。つまりAサイトに欠陥が発生する。よって、加えられた銅の一部がAサイトを占有して欠陥を補うことが好ましい。
(1) 抵抗率が増加。
(2) 分極処理した圧電材料の共振周波数でのインピーダンスの位相反転角が増加。
(3) 分極−電界ヒステリシス曲線測定で評価される残留分極値が増加。
(4) 電気機械結合係数もしくは圧電定数が増加。
(5) 機械品質係数が低下。
(6) ヤング率が低下。
(7) 誘電正接(tanδ)が低下。
(1) 電気機械結合係数もしくは圧電定数が減少。
(2) 機械品質係数が増加。
(3) ヤング率が増加。
(4) 内部電界を有する。内部電界の大きさは、分極−電界のヒステリシスループ測定から得られる正負の抗電界の大きさの差分の半分となる。分極処理によって欠陥分極の方向も印加電界方向に揃うため、内部電界強度の見積もりには、分極処理を施した試料を用いることができる。
焼成の前段階である成形体は、金型成形、鋳込み成型、シート成形などのいずれの手法でも構わない。
原料には、炭酸ナトリウム(Na2CO3)、酸化ニオブ(Nb2O5)、チタン酸バリウム(BaTiO3)の粉末を用いた。チタン酸バリウム粉末は粒径100nmの市販品(堺化学工業株式会社製、商品名BT01)である。NN−BTを合成する際、ナトリウムとニオブのモル比が1:1となるように原料を秤量すると、焼結後の試料からBa4Nb2O9(ICDD35−1154)、Ba6Ti7Nb9O42(ICDD47−0522)、Ba3Nb4Ti4O21(ICDD70−1150)、Ba3Nb3.2Ti5O21(ICDD33−0170)の少なくとも一つと回折パターンが類似の不純物相が検出されることがあった。そのため、比較例1、2、4を作成する際には、目的組成に対して3%過剰のナトリウムを秤量している。これにより不純物相の発生が顕著に抑制された。比較例1,2,4のキュリー温度は、それぞれ160、190、240℃であった。
比較例1、2、4と同様の方法で試料を作成した。ただし、原料を秤量、混合する際に、ニオブ1molに対して0.1、0.25、0.5、0.75、1、2mol%の酸化銅(CuO)粉末を加えた。エックス線回折により、焼結体はペロブスカイト構造単相であることが確認できた。
銅の添加による20℃以上のキュリー温度の変化は観察されなかった。
実施例4と同様の方法で試料を作成した。ただし、酸化銅粉末の代わりに二酸化マンガン(MnO2)粉末を用いた。エックス線回折により、焼結体はペロブスカイト構造単相であることが確認できた。マンガンを加えたNN−BTの分極反転特性は、実施例4の分極反転特性(図6)と同様であった。つまり、マンガンも銅と同様にNN−BTの分極ピニングを解消する効果があることがわかった。さらには、マンガンは抵抗率を向上させる効果も確認された(表1)。ところが、マンガンを加えた試料は、本発明の銅を加えた試料と比較して、密度が低く、また機械的品質係数も低かった。
粒径が概ね100〜200nmであるニオブ酸ナトリウム粉末とチタン酸バリウム粉末を、目的組成Na1−xBaxNb1−xTixO3(x=0.12)になるように秤量して混合した。混合した粉末を大気中900から1100℃で空気中、2から5時間かけて仮焼した。仮焼粉を粉砕し、バインダーを加えて造粒した。造粒粉を金型内に充填し、圧縮することで直径17mm、厚みが約1mmの成形体を作製した。得られた成形体を1100から1300℃で空気中、2〜6時間焼成することにより、焼結体を得た。得られた焼結体中のナトリウムとニオブのモル比をICPで分析したところ、ナトリウムは目的組成からいずれも不足しており、最大で2%不足していた。バリウムとチタンの比率は概ね1:1であった。
比較例5と同様の方法で試料を作成した。ただし、原料を秤量、混合する際に、ニオブの0.5、0.75、1、1.5mol%の酸化銅粉末を加えた。エックス線回折により、試料はペロブスカイト構造単相であることが確認できた。
実施例4と同じ圧電材料を用いて、図1に示される液体吐出ヘッドを作製した。入力した電気信号に追随したインクの吐出が確認された。
実施例4と同じ圧電材料を用いて、図2に示される超音波モータ作製した。交流電圧の印加に応じたモータの回転が確認された。
実施例4と同じ圧電材料を用いて、図3に示される塵埃除去装置を作製した。プラスチック製ビーズを散布し、交流電圧を印加したところ、良好な塵埃除去率が確認された。
102 個別液室
103 振動板
104 液室隔壁
105 吐出口
106 連通孔
107 共通液室
108 バッファ層
1011 第一の電極
1012 圧電材料
1013 第二の電極
201 振動子
202 ロータ
203 出力軸
204 振動子
205 ロータ
206 バネ
2011 弾性体リング
2012 圧電素子
2013 有機系接着剤
2041 金属弾性体
2042 積層圧電素子
310 塵埃除去装置
330 圧電素子
320 振動板
330 圧電素子
331 圧電材料
332 第1の電極
333 第2の電極
336 第1の電極面
337 第2の電極面
Claims (6)
- 下記一般式(1)で表わされるペロブスカイト型金属酸化物1molに対して、銅をy×0.05mol%以上y×2mol%以下含むことを特徴とする圧電材料。
一般式(1)(NaxBa1−y)(NbyTi1−y)O3(式中、0.80≦x≦0.95、0.85≦y≦0.95) - 前記一般式(1)において、x<yであることを特徴とする請求項1に記載の圧電材料。
- 圧電材料と、該圧電材料に接して設けられた一対の電極とを少なくとも有する圧電素子であって、前記圧電材料が請求項1または2に記載の圧電材料であることを特徴とする圧電素子。
- 請求項3に記載の圧電素子を配した振動部を備えた液室と、前記液室と連通する吐出口を少なくとも有する液体吐出ヘッド。
- 請求項3に記載の圧電素子を配した振動体と、前記振動体と接触する移動体を少なくとも有する超音波モータ。
- 振動体に請求項3に記載の圧電素子を配した塵埃除去装置。
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Also Published As
Publication number | Publication date |
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CN103415489B (zh) | 2016-01-06 |
US8955947B2 (en) | 2015-02-17 |
EP2663538B1 (en) | 2014-12-24 |
KR101556456B1 (ko) | 2015-10-01 |
EP2663538A1 (en) | 2013-11-20 |
WO2012118213A1 (en) | 2012-09-07 |
JP6021351B2 (ja) | 2016-11-09 |
US20130335488A1 (en) | 2013-12-19 |
KR20130132988A (ko) | 2013-12-05 |
CN103415489A (zh) | 2013-11-27 |
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