A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
NIOBIUM-BASED LEAD-FREE PIEZOELECTRIC CERAMIC AND PRODUCING METHOD THEREOF
To provide a piezoelectric ceramic having improved piezoelectric characteristics by using nano-sized sodium niobate and potassium niobate produced by a hydrothermal method, and a producing method thereof.SOLUTION: The present invention provides a niobium-based lead-free piezoelectric ceramic having improved piezoelectric characteristics such as a reduced rate of change in a temperature characteristic of a relative permittivity and excellent piezoelectric characteristics with regard to relative permittivity and equivalent piezoelectric constant, and a producing method thereof in which at least a lithium carbonate, a barium carbonate, a zirconium oxide, a titanium oxide, a bismuth oxide and an iron oxide are added within each predetermined range, a raw material thus formed is added with the sodium niobate and the potassium niobate prepared by the hydrothermal method as additives, an alkalinization treatment is applied for raising pH so as to be weak alkaline, and then mixing, crushing and firing, etc. are carried out.SELECTED DRAWING: Figure 1
【課題】 水熱合成法で作製したナノサイズの粒径のニオブ酸ナトリウムとニオブ酸カリウムを使用することで圧電特性を高めた圧電セラミックス及びその製造方法に関する。【解決手段】少なくとも炭酸リチウム、炭酸バリウム、酸化ジルコニウム、酸化チタン、酸化ビスマス及び酸化鉄をそれぞれ所定範囲内で加え、原料に、水熱合成法で作製したニオブ酸ナトリウムとニオブ酸カリウムを添加剤として加えてｐＨを弱アルカリ化処理し、混合、粉砕、焼成等させ、比誘電率の温度特性の変化率を下げ、比誘電率、等価圧電定数及び圧電特性を高めたニオブ系非鉛圧電セラミックス及びその製造方法。【選択図】 図１
NIOBIUM-BASED LEAD-FREE PIEZOELECTRIC CERAMIC AND PRODUCING METHOD THEREOF
To provide a piezoelectric ceramic having improved piezoelectric characteristics by using nano-sized sodium niobate and potassium niobate produced by a hydrothermal method, and a producing method thereof.SOLUTION: The present invention provides a niobium-based lead-free piezoelectric ceramic having improved piezoelectric characteristics such as a reduced rate of change in a temperature characteristic of a relative permittivity and excellent piezoelectric characteristics with regard to relative permittivity and equivalent piezoelectric constant, and a producing method thereof in which at least a lithium carbonate, a barium carbonate, a zirconium oxide, a titanium oxide, a bismuth oxide and an iron oxide are added within each predetermined range, a raw material thus formed is added with the sodium niobate and the potassium niobate prepared by the hydrothermal method as additives, an alkalinization treatment is applied for raising pH so as to be weak alkaline, and then mixing, crushing and firing, etc. are carried out.SELECTED DRAWING: Figure 1
【課題】 水熱合成法で作製したナノサイズの粒径のニオブ酸ナトリウムとニオブ酸カリウムを使用することで圧電特性を高めた圧電セラミックス及びその製造方法に関する。【解決手段】少なくとも炭酸リチウム、炭酸バリウム、酸化ジルコニウム、酸化チタン、酸化ビスマス及び酸化鉄をそれぞれ所定範囲内で加え、原料に、水熱合成法で作製したニオブ酸ナトリウムとニオブ酸カリウムを添加剤として加えてｐＨを弱アルカリ化処理し、混合、粉砕、焼成等させ、比誘電率の温度特性の変化率を下げ、比誘電率、等価圧電定数及び圧電特性を高めたニオブ系非鉛圧電セラミックス及びその製造方法。【選択図】 図１
NIOBIUM-BASED LEAD-FREE PIEZOELECTRIC CERAMIC AND PRODUCING METHOD THEREOF
ニオブ系非鉛圧電セラミックス及びその製造方法
WATANABE KAZUTAKA (author) / MOCHIZUKI MASAHIKO (author) / TAKAHASHI HIROFUMI (author)
2021-01-07
Patent
Electronic Resource
Japanese
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