JP5641668B2 - 低焼結温度を有する強誘電性セラミック材料 - Google Patents
低焼結温度を有する強誘電性セラミック材料 Download PDFInfo
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Description
wPb(Ni1/3Nb2/3)O3−xPb(Zn1/3Nb2/3)O3−yPb(Mg1/3Nb2/3)O3−zPbZrO3−(1−w−x−y−z)PbTiO3(式中、0<w<1、0<x<1、0≦y<1、0<z<1、w+x+y+z<1、および0.5≦w+x+y)
を有する組成物を含む強誘電性セラミック材料が提供される。
wPNN−xPZN−yPMN−zPZ−(1−w−x−y−z)PT
(式中、PNNは、鉛ニッケルニオブ酸塩、Pb(Ni1/3Nb2/3)O3であり;PZNは、鉛亜鉛ニオブ酸塩、Pb(Zn1/3Nb2/3)O3であり;PMNは、鉛マグネシウムニオブ酸塩、Pb(Mg1/3Nb2/3)O3であり;PZは、鉛ジルコン酸塩、PbZrO3であり;PTは、鉛チタン酸塩、PbTiO3である。)を有する。これらの組成物において、wは、0.1〜0.45の間で選択され、xは、0.1〜0.35の間で選択され、yは、0〜0.15の間で選択され、zは、0.1〜0.15の間で選択される。
図1Aにおいて例示される通り、表1において特定される組成(0.10PNN−0.35PZN−0.15PMN−0.10PZ−0.30PT)を有する組成物C5の強誘電性セラミック材料の調製方法100は、MgNb2O6(MNO)、ZnNb2O6(ZNO)およびNiNb2O6(NNO)粉末前駆体の合成から開始する。
表1において特定されるその他の組成物C4(0.20PNN−0.20PZN−0.10PMN−0.15PZ−0.35PT)は、実施例1に記載の同じ処理経路により生成されてもよい。
表1において特定されるその他のセラミック組成物C3(0.30PNN−0.10PZN−0.10PMN−0.15PZ−0.35PT)は、実施例1に記載の同じ処理経路により生成され得る。
表1において特定されるセラミック組成物C2(0.40PNN−0.10PZN−0.10PMN−0.12PZ−0.28PT)は、実施例1に記載の同じ処理経路により生成されてもよい。表2において示される通り、C2テストサンプルの密度は、焼結温度が830℃である場合に、7.68g/cm3の最大値まで増加する。2578〜3126の高誘電定数は、800〜950℃の広い処理温度範囲において得られる。残留分極および圧電係数は、900℃で焼結したサンプルに対して、それぞれに、10.0μC/cm2(図2)および158pC/N(図3)である。誘電定数の温度依存性は、この組成物が、図4において示される通り、139℃のキュリー温度を有することを示す。
表1において特定されるセラミック組成物C1(0.45PNN−0.10PZN−0.13PZ−0.32PT)は、実施例1に記載の同じ処理経路により生成されてもよい。表2において示される通り、C1テストサンプルの密度は、焼結温度が800℃である場合に、7.87g/cm3の最大値まで増加する。2403〜3181の高誘電定数は、800〜950℃の処理温度範囲において得られる。残留分極および圧電係数は、900℃で焼結したサンプルに対して、それぞれに、10.1μC/cm2(図2)および164pC/N(図3)である。誘電定数の温度依存性は、この組成物が、図4において示される通り、145℃のキュリー温度を有することを示す。
2価金属元素の過剰酸化物は、本発明の更なる実施形態により、焼結過程およびペロブスカイト相の形成を促進するために添加されてもよい。PbOの添加は、実施例1において言及されている。同様に、過剰のMgO、NiO、およびZnOを、同じ目的のために添加することができる。実施例6においては、過剰のMgO添加が、手順の説明のために記述される。
(比較)
実施例7は、C5におけるペロブスカイト相形成の促進についてのコロンバイト前駆体の使用の効果を例示するために使用される。
Claims (24)
- 式:
wPb(Ni1/3Nb2/3)O3−xPb(Zn1/3Nb2/3)O3−yPb(Mg1/3Nb2/3)O3−zPbZrO3−(1−w−x−y−z)PbTiO3
(式中、
0<w<1、0<x<1、0.1≦y<1、0<z<1、w+x+y+z<1、および
0.5≦w+x+y)
で表される組成物を含み、
1000℃未満の温度における仕上げの焼結によって得られ、
ペロブスカイト構造の単一相を有する
ことを特徴とする、強誘電性セラミック材料。 - 前記強誘電性セラミック材料が、800℃から950℃の範囲の温度における仕上げの焼結によって得られることを特徴とする、請求項1に記載の強誘電性セラミック材料。
- w=0.10〜0.45、x=0.10〜0.35、y=0.1〜0.15、およびz=0.10〜0.15である、請求項1または2に記載の強誘電性セラミック材料。
- w=0.10、x=0.35、y=0.15、およびz=0.10である、請求項3に記載の強誘電性セラミック材料。
- w=0.20、x=0.20、y=0.10、およびz=0.15である、請求項3に記載の強誘電性セラミック材料。
- w=0.30、x=0.10、y=0.10、およびz=0.15である、請求項3に記載の強誘電性セラミック材料。
- w=0.40、x=0.10、y=0.10、およびz=0.12である、請求項3に記載の強誘電性セラミック材料。
- A2+Oの一般式で表される2価金属元素の酸化物を更に含む、請求項1から7のいずれか一項に記載の強誘電性セラミック材料。
- 前記A2+Oが、PbO、MgO、ZnO、NiOまたはこれらの組合せからなる群から選択される、請求項8に記載の強誘電性セラミック材料。
- 前記2価金属元素の酸化物が、モルにおいて1%の量を有する、請求項8に記載の強誘電性セラミック材料。
- 前記2価金属元素の酸化物が、MgOである、請求項10に記載の強誘電性セラミック材料。
- 請求項1から11のいずれか一項に記載の強誘電性セラミック材料から作製される電子部品。
- MgNb2O6、ZnNb2O6およびNiNb2O6前駆体を調製するステップ、
前記前駆体を、PbO、TiO2およびZrO2と混合して、混合物を形成するステップ、および
前記混合物を焼成するステップ、
を含む、請求項1から11のいずれか一項に記載の強誘電性セラミック材料を調製する方法。 - 前記MgNb2O6前駆体が、950℃〜1050℃の温度で調製される、請求項13に記載の方法。
- 前記ZnNb2O6前駆体が、750℃〜950℃の温度で調製される、請求項13に記載の方法。
- 前記NiNb2O6前駆体が、950℃〜1050℃の温度で調製される、請求項13に記載の方法。
- 前駆体と、PbO、TiO2およびZrO2との混合中に、2価金属元素の酸化物を添加することを更に含む、請求項13に記載の方法。
- 2価金属元素の酸化物が、PbO、MgO、NiOおよびZnOからなる群から選択される、請求項17に記載の方法。
- 2価金属元素の酸化物がMgOであり、モルにおいて1%の量である、請求項18に記載の方法。
- 2価金属元素の酸化物が、強誘電性セラミック材料におけるペロブスカイト相の形成を促進するためのものである、請求項17に記載の方法。
- 請求項13に記載の方法により調製される強誘電性セラミック材料から作製されるバルク強誘電性セラミック。
- 請求項13に記載の方法により調製される強誘電性セラミック材料から作製される強誘電性セラミック厚膜。
- 請求項13に記載の方法により調製される強誘電性セラミック材料から作製される強誘電性多層セラミック電子部品。
- 前駆体が粉末形態である、請求項13から20のいずれか一項に記載の方法。
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US11/404,195 US8470211B2 (en) | 2006-04-13 | 2006-04-13 | Ferroelectric ceramic material with a low sintering temperature |
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KR100790882B1 (ko) * | 2006-07-10 | 2008-01-03 | 삼성전자주식회사 | 가변 저항 물질을 포함하는 비휘발성 메모리 소자 |
US7549695B2 (en) * | 2007-05-24 | 2009-06-23 | Royer Real | Device for manipulating a tarpaulin |
CN103435346B (zh) * | 2013-08-26 | 2015-03-04 | 江苏大学 | 一种超声接收型换能器用压电陶瓷材料 |
JP5931127B2 (ja) * | 2013-11-08 | 2016-06-08 | 太陽誘電株式会社 | 圧電セラミックス、その製造方法、及び、それを有する圧電セラミックスピーカ |
CN103803967B (zh) * | 2014-02-17 | 2015-07-29 | 广东国华新材料科技股份有限公司 | 微波介质陶瓷及其制备方法 |
CN104557038B (zh) * | 2014-12-30 | 2017-07-07 | 中国科学院声学研究所 | 一种复合体系热释电陶瓷材料及其制备方法 |
SG10201912616YA (en) | 2015-06-22 | 2020-02-27 | Agency Science Tech & Res | Fluid jet dispenser using multilayer ceramic actuators |
CN112624757B (zh) * | 2020-12-23 | 2022-04-01 | 同济大学 | 一种具有宽温区高电卡效应和低场高电卡强度的钛酸铋钠基弛豫铁电陶瓷材料及其制备方法 |
CN113964266B (zh) * | 2021-10-13 | 2023-09-19 | 中国科学院光电技术研究所 | 一种制备高性能铋基无铅压电驱动器的方法 |
CN115321979B (zh) * | 2022-08-01 | 2023-08-25 | 苏州思若梅克电子科技有限公司 | 一种多元素掺杂的铅基压电陶瓷及其制备方法 |
CN115677343B (zh) * | 2022-10-14 | 2023-09-08 | 中国科学院上海硅酸盐研究所 | 一种高剩余极化强度bnt基铁电陶瓷材料及其制备方法与应用 |
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JPS6022514B2 (ja) * | 1976-06-16 | 1985-06-03 | ソニー株式会社 | 圧電磁器組成物 |
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JP2521859B2 (ja) * | 1991-06-05 | 1996-08-07 | 太陽誘電株式会社 | 誘電体磁器組成物及びその製造方法 |
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