JP4881315B2 - 圧電磁器組成物および圧電磁器 - Google Patents
圧電磁器組成物および圧電磁器 Download PDFInfo
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Description
また、チタン酸ジルコン酸鉛あるいはチタン酸鉛を主成分とする圧電磁器は、その製造過程において鉛酸化物の蒸発を伴うために、得られる製品間に圧電特性のばらつきが生じやすいという課題をも有していた。
また、鉛を含有しない他の圧電磁器として、例えば、チタン酸ビスマス・ナトリウム((Bi0.5Na0.5)TiO3)系の圧電セラミックスが知られている(例えば、非特許文献2、特許文献3)。
詳しくは、(KNaLi)NbO3のNaがリッチな組成系は、結晶構造が斜方晶で、−40〜150℃の温度範囲に第二次相転移を有し、キュリー温度は約200〜400℃である。このような(KNaLi)NbO3に対して、結晶構造が正方晶であり、キュリー温度約340℃、低温側の強誘電相から高温側の反強誘電相へと相転移する第二次相転移は約240℃で起こる(Bi0.5Na0.5)TiO3を最適量導入するとともに、さらに、結晶構造が菱面体晶であり、キュリー温度が約870℃であるBiFeO3を最適量導入することによって、(KNaLi)NbO3に異なる結晶を複合的に固溶させた結果、相転移温度を変化させて、弾性定数の温度変化や圧電g33定数の温度変化を制御できるのである。
(1−a−b)(KxNayLi1-x-y)NbO3‐a(Bi0.5Na0.5)TiO3‐bBiFeO3
0< a ≦0.12
0< b ≦0.10
0≦ x ≦0.18
0.80≦ y <1.00
で表される組成を有することを特徴とする。特に、(2)前記a、前記b、前記xおよび前記yが、
0.01≦ a ≦0.04
0.01≦ b ≦0.03
0.025≦ x ≦0.075
0.905< y <0.98
で表される組成を有することが望ましい。
(1−a−b)(KxNayLi1-x-y)NbO3‐a(Bi0.5Na0.5)TiO3‐bBiFeO3
0< a ≦0.12
0< b ≦0.10
0≦ x ≦0.18
0.80≦ y <1.00
の範囲を有する。
(1−a−b)(KxNayLi1-x-y)NbO3‐a(Bi0.5Na0.5)TiO3‐bBiFeO3
0< a ≦0.12
0< b ≦0.10
0≦ x ≦0.18
0.80≦ y <1.00
の関係になるように組成を調整していることにより、従来よりも広い温度範囲で使用できる圧電特性に優れた圧電磁器を得ることができる。
(1−a−b)(KxNayLi1-x-y)NbO3‐a(Bi0.5Na0.5)TiO3‐bBiFeO3
0.01≦ a ≦0.04
0.01≦ b ≦0.03
0.025≦ x ≦0.075
0.905< y <0.98
で表される組成を有する組成物がより望ましい。
(1−a−b)(KxNayLi1-x-y)NbO3−a(Bi0.5Na0.5)TiO3−bBiFeO3
におけるa、b、xおよびyが表1に示す値である組成となるように、各原料粉末を秤量した。次に、秤量した各原料を、イソプロピルアルコール(IPA)とZrO2ボールとを用いてボールミルで12時間湿式混合した。次いで、この混合物を乾燥した後、大気中で900〜1000℃にて3時間仮焼し、得られた仮焼物を再び上記ボールミルで細かく粉砕した。その後、この粉砕物にポリビニルアルコール(PVA)等のバインダーを混合して造粒した。次に、得られた造粒物(粉末)を200MPaの圧力で、φ3mm×厚さ12mmの円柱状に成形した。この成形体を大気中において1000〜1250℃で2時間焼成することにより、磁器を作製した。
Claims (4)
- ニオブ酸カリウム・ナトリウム・リチウムを(K x Na y Li 1-x-y )NbO 3 、チタン酸ビスマス・ナトリウムを(Bi 0.5 Na 0.5 )TiO 3 、鉄酸ビスマスをBiFeO 3 としたときに、式:
(1−a−b)(K x Na y Li 1-x-y )NbO 3 ‐a(Bi 0.5 Na 0.5 )TiO 3 ‐bBiFeO 3
0< a ≦0.12
0< b ≦0.10
0≦ x ≦0.18
0.80≦ y <1.00
で表される組成を有することを特徴とする圧電磁器組成物。 - 前記a、前記b、前記xおよび前記yが、
0.01≦ a ≦0.04
0.01≦ b ≦0.03
0.025≦ x ≦0.075
0.905< y <0.98
で表される組成を有することを特徴とする請求項1記載の圧電磁器組成物。 - 請求項1または2に記載の圧電磁器組成物を焼成して得られることを特徴とする圧電磁器。
- 電気機械結合係数k33が30%以上であり、かつ圧電g33定数が20×10-3V/N以上であることを特徴とする請求項3に記載の圧電磁器。
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PCT/JP2006/321551 WO2007049764A1 (ja) | 2005-10-27 | 2006-10-27 | 圧電磁器組成物および圧電磁器 |
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EP (1) | EP1950188B1 (ja) |
JP (1) | JP4881315B2 (ja) |
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JP4684089B2 (ja) * | 2005-11-28 | 2011-05-18 | 京セラ株式会社 | 圧電磁器組成物および圧電磁器 |
WO2008123558A1 (ja) * | 2007-03-29 | 2008-10-16 | Toho Titanium Co., Ltd. | チタン酸アルカリ及びチタン酸アルカリの中空体粉末の製造方法、並びにこれにより得られたチタン酸アルカリ及びその中空体粉末、並びにこれを含む摩擦材 |
JP5681398B2 (ja) * | 2009-07-09 | 2015-03-04 | 富士フイルム株式会社 | ペロブスカイト型酸化物、強誘電体組成物、圧電体、圧電素子、及び液体吐出装置 |
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GB201012637D0 (en) * | 2010-07-28 | 2010-09-15 | Univ Leeds | Ceramic |
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JP6080465B2 (ja) * | 2011-10-26 | 2017-02-15 | キヤノン株式会社 | 圧電材料、圧電素子、圧電音響部品、および電子機器 |
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WO2016103513A1 (ja) * | 2014-12-26 | 2016-06-30 | セイコーエプソン株式会社 | 圧電材料及びその製造方法、並びに圧電素子及び圧電素子応用デバイス |
WO2016103514A1 (ja) | 2014-12-26 | 2016-06-30 | セイコーエプソン株式会社 | 圧電材料及びその製造方法、並びに圧電素子及び圧電素子応用デバイス |
CN104649660B (zh) * | 2015-03-10 | 2016-09-14 | 桂林电子科技大学 | 一种铁酸铋基高温压电与介电储能陶瓷及其制备方法 |
GB2564634B (en) * | 2017-05-12 | 2021-08-25 | Xaar Technology Ltd | A piezoelectric solid solution ceramic material |
CN110981469A (zh) * | 2019-12-31 | 2020-04-10 | 西安理工大学 | 一种钛酸铋钠基高温压电陶瓷的制备方法 |
CN115073159B (zh) * | 2022-07-30 | 2023-09-26 | 桂林电子科技大学 | 一种具有高居里温度及高压电性能的铁酸铋-钛酸钡陶瓷及其低温含氧热压烧结制备方法 |
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JP4684089B2 (ja) * | 2005-11-28 | 2011-05-18 | 京セラ株式会社 | 圧電磁器組成物および圧電磁器 |
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JPS538799A (en) * | 1976-07-10 | 1978-01-26 | Kouichirou Sakata | Magnetic capacitor material |
JPH11228226A (ja) * | 1998-02-18 | 1999-08-24 | Murata Mfg Co Ltd | 圧電磁器組成物 |
JPH11228228A (ja) * | 1998-02-18 | 1999-08-24 | Murata Mfg Co Ltd | 圧電磁器組成物 |
JP2000128632A (ja) * | 1998-10-26 | 2000-05-09 | Tdk Corp | 圧電セラミックス |
JP2000272963A (ja) * | 1999-03-24 | 2000-10-03 | Tokin Corp | 圧電体磁器組成物 |
JP2001316182A (ja) * | 2000-04-28 | 2001-11-13 | Kyocera Corp | 圧電磁器および圧電共振子 |
JP2002255641A (ja) * | 2001-02-27 | 2002-09-11 | Kyocera Corp | 圧電磁器および圧電素子 |
JP2003012374A (ja) * | 2001-06-29 | 2003-01-15 | Tokai Carbon Co Ltd | 炭素繊維強化炭素材の製造方法 |
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CN101291889A (zh) | 2008-10-22 |
JPWO2007049764A1 (ja) | 2009-04-30 |
US20090267016A1 (en) | 2009-10-29 |
WO2007049764A1 (ja) | 2007-05-03 |
US7959823B2 (en) | 2011-06-14 |
EP1950188A1 (en) | 2008-07-30 |
CN101291889B (zh) | 2011-09-07 |
EP1950188B1 (en) | 2016-07-27 |
EP1950188A4 (en) | 2011-05-04 |
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