JP6656882B2 - 誘電体磁器組成物及びこれを含む積層セラミックキャパシタ - Google Patents
誘電体磁器組成物及びこれを含む積層セラミックキャパシタ Download PDFInfo
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Description
本発明の一実施形態による誘電体磁器組成物は、BaTiO3で表示される第1の主成分、(Na,K)NbO3で表示される第2の主成分及び(Bi,Na)TiO3で表示される第3の主成分を含む母材粉末を含むことができる。
本発明の一実施形態によれば、上記誘電体磁器組成物は、第1の副成分として、Mn、V、Cr、Fe、Ni、Co、Cu及びZnのうち少なくとも一つ以上を含む酸化物又は炭酸塩をさらに含むことができる。
本発明の一実施形態によれば、上記誘電体磁器組成物は、第2の副成分として、Siを含む酸化物又はSiを含むガラス(Glass)化合物を含むことができる。
[項目1]
母材粉末を含む誘電体磁器組成物であって、
母材粉末は、BaTiO 3 で表示される第1の主成分、(Na,K)NbO 3 で表示される第2の主成分及び(Bi,Na)TiO 3 で表示される第3の主成分を含む、誘電体磁器組成物。
[項目2]
母材粉末は、xBaTiO 3 −y(Na,K)NbO 3 −z(Bi,Na)TiO 3 (但し、x+y+z=1、x、y、zはモル(mol))で表示され、xが0.5≦x≦0.97、yが0.01≦y≦0.48及びzが0.02≦z≦0.2を満たす、項目1に記載の誘電体磁器組成物。
[項目3]
母材粉末は、xBaTiO 3 −y(Na 0.5 K 0.5 )NbO 3 −z(Bi 0.5 Na 0.5 )TiO 3 で表示される、項目2に記載の誘電体磁器組成物。
[項目4]
誘電体磁器組成物は、母材粉末100モル%に対して、Mn、V、Cr、Fe、Ni、Co、Cu及びZnのうち少なくとも一つを含む酸化物又は炭酸塩である0.1〜3.0モル%の第1の副成分をさらに含む、項目1から3のいずれか1項に記載の誘電体磁器組成物。
[項目5]
誘電体磁器組成物は、母材粉末100モル%に対して、Siを含む酸化物又はSiを含むガラス(Glass)化合物である0.2〜10.0モル%の第2の副成分をさらに含む、項目1から4のいずれか1項に記載の誘電体磁器組成物。
[項目6]
第1の主成分〜第3の主成分は固溶体の形である、項目1から5のいずれか1項に記載の誘電体磁器組成物。
[項目7]
誘電体層と第1の内部電極及び第2の内部電極が交互に積層されたセラミック本体と、
セラミック本体の両端部に形成され、第1の内部電極及び第2の内部電極と電気的に連結される第1の外部電極及び第2の外部電極と、
を含み、
誘電体層はBaTiO 3 で表示される第1の主成分、(Na,K)NbO 3 で表示される第2の主成分及び(Bi,Na)TiO 3 で表示される第3の主成分を含む母材粉末及び副成分を含む誘電体磁器組成物を含む、積層セラミックキャパシタ。
[項目8]
母材粉末は、xBaTiO 3 −y(Na,K)NbO 3 −z(Bi,Na)TiO 3 (但し、x+y+z=1、x、y、zはモル(mol))で表示され、xが0.5≦x≦0.97、yが0.01≦y≦0.48及びzが0.02≦z≦0.2を満たす、項目7に記載の積層セラミックキャパシタ。
[項目9]
母材粉末は、xBaTiO 3 −y(Na 0.5 K 0.5 )NbO 3 −z(Bi 0.5 Na 0.5 )TiO 3 で表示される、項目8に記載の積層セラミックキャパシタ。
[項目10]
誘電体磁器組成物は、母材粉末100モル%に対して、Mn、V、Cr、Fe、Ni、Co、Cu及びZnのうち少なくとも一つを含む酸化物又は炭酸塩である0.1〜3.0モル%の第1の副成分をさらに含む、項目7から9のいずれか1項に記載の積層セラミックキャパシタ。
[項目11]
誘電体磁器組成物は、母材粉末100モル%に対して、Siを含む酸化物又はSiを含むガラス(Glass)化合物である0.2〜10.0モル%の第2の副成分をさらに含む、項目7から10のいずれか1項に記載の積層セラミックキャパシタ。
[項目12]
第1の主成分〜第3の主成分は固溶体の形である、項目7から11のいずれか1項に記載の積層セラミックキャパシタ。
[項目13]
母材粉末を含む誘電体磁器組成物であって、
母材粉末はキュリー温度が125℃の第1の主成分(X)、キュリー温度が450℃以上の第2の主成分(Y)及びキュリー温度が320℃以上の第3の主成分(Z)を含み、母材粉末はxX−yY−zZ(但し、x+y+z=1、x、y、zはモル(mol))で表示され、XとZはチタンを含み、Yはニオビウムを含む、誘電体磁器組成物。
[項目14]
xは0.5≦x≦0.97、yは0.01≦y≦0.48及びzは0.02≦z≦0.2を満たす、項目13に記載の誘電体磁器組成物。
[項目15]
XはBaTiO 3 、Yは(Na,K)NbO 3 、Zは(Bi,Na)TiO 3 である、項目13または14に記載の誘電体磁器組成物。
[項目16]
誘電体磁器組成物は、母材粉末100モル%に対して、Mn、V、Cr、Fe、Ni、Co、Cu及びZnのうち少なくとも一つを含む酸化物又は炭酸塩である0.1〜3.0モル%の第1の副成分をさらに含む、項目13から15のいずれか1項に記載の誘電体磁器組成物。
[項目17]
誘電体層と第1の内部電極及び第2の内部電極が交互に積層されたセラミック本体と、
セラミック本体の両端部に形成され、第1の内部電極及び第2の内部電極と電気的に連結される第1の外部電極及び第2の外部電極と、
を含み、
誘電体層は誘電体磁器組成物を含み、誘電体磁器組成物は母材粉末を含み、母材粉末はキュリー温度が125℃の第1の主成分(X)、キュリー温度が450℃以上の第2の主成分(Y)及びキュリー温度が320℃以上の第3の主成分(Z)を含み、
−55℃〜175℃の範囲での静電容量変化率が+/−15%以内であり、常温での誘電率が1000以上であり、150℃で耐電圧が少なくとも50V/μmであり、常温での抵抗値が7.420E+10以上である、積層セラミックキャパシタ。
[項目18]
母材粉末はxX−yY−zZ(但し、x+y+z=1、x、y、zはモル(mol))で表示され、XとZはチタンを含み、Yはニオビウムを含む、項目17に記載の積層セラミックキャパシタ。
[項目19]
xは0.5≦x≦0.97、yは0.01≦y≦0.48及びzは0.02≦z≦0.2を満たす、項目18に記載の積層セラミックキャパシタ。
[項目20]
XはBaTiO 3 、Yは(Na,K)NbO 3 、Zは(Bi,Na)TiO 3 である、項目18または19に記載の積層セラミックキャパシタ。
[項目21]
BaCO 3 とTiO 2 を混合して第1の混合物を形成する段階と、
第1の混合物を900〜1000℃の範囲でか焼してBaTiO 3 を形成する段階と、
Na 2 O、K 2 OとNb 2 O 3 を混合して第2の混合物を形成する段階と、
第2の混合物を800〜900℃の範囲でか焼して(Na 0.5 K 0.5 )NbO 3 を形成する段階と、
Bi 2 O 3 、Na 2 CO 3 とTiO 2 を混合して第3の混合物を形成する段階と、
第3の混合物を800〜900℃の範囲でか焼して(Bi 0.5 Na 0.5 )TiO 3 を形成する段階と、
BaTiO 3 と(Na 0.5 K 0.5 )NbO 3 及び(Bi 0.5 Na 0.5 )TiO 3 を混合して母材粉末を形成する段階と、
を含む、誘電体磁器組成物の製造方法。
[項目22]
母材粉末は、xBaTiO 3 −y(Na,K)NbO 3 −z(Bi,Na)TiO 3 (但し、x+y+z=1、x、y、zはモル(mol))で表示され、xが0.5≦x≦0.97、yが0.01≦y≦0.48及びzが0.02≦z≦0.2を満たす、項目21に記載の誘電体磁器組成物の製造方法。
[項目23]
誘電体磁器組成物は、母材粉末100モル%に対して、Mn、V、Cr、Fe、Ni、Co、Cu及びZnのうち少なくとも一つを含む酸化物又は炭酸塩である0.1〜3.0モル%の第1の副成分をさらに含む、項目21または22に記載の誘電体磁器組成物の製造方法。
[項目24]
誘電体磁器組成物は、母材粉末100モル%に対して、Siを含む酸化物又はSiを含むガラス(Glass)化合物である0.2〜10.0モル%の第2の副成分をさらに含む、項目21から23のいずれか1項に記載の誘電体磁器組成物の製造方法。
110 セラミック本体
111 誘電体層
121、122 第1及び第2の内部電極
131、132 第1及び第2の外部電極
Claims (14)
- 誘電体層と第1の内部電極及び第2の内部電極が交互に積層されたセラミック本体と、
前記セラミック本体の両端部に形成され、前記第1の内部電極及び前記第2の内部電極と電気的に連結される第1の外部電極及び第2の外部電極と、
を含み、
前記誘電体層はBaTiO3で表示される第1の主成分、(Na,K)NbO3で表示される第2の主成分及び(Bi,Na)TiO3で表示される第3の主成分を含む母材粉末及び副成分を含む誘電体磁器組成物を含む、積層セラミックキャパシタ。 - 前記母材粉末は、xBaTiO3−y(Na,K)NbO3−z(Bi,Na)TiO3(但し、x+y+z=1、x、y、zはモル(mol))で表示され、前記xが0.5≦x≦0.97、yが0.01≦y≦0.48及びzが0.02≦z≦0.2を満たす、請求項1に記載の積層セラミックキャパシタ。
- 前記母材粉末は、xBaTiO3−y(Na0.5K0.5)NbO3−z(Bi0.5Na0.5)TiO3で表示される、請求項2に記載の積層セラミックキャパシタ。
- 前記誘電体磁器組成物は、前記母材粉末100モル%に対して、Mn、V、Cr、Fe、Ni、Co、Cu及びZnのうち少なくとも一つを含む酸化物又は炭酸塩である0.1〜3.0モル%の第1の副成分をさらに含む、請求項1から3のいずれか1項に記載の積層セラミックキャパシタ。
- 前記誘電体磁器組成物は、前記母材粉末100モル%に対して、Siを含む酸化物又はSiを含むガラス(Glass)化合物である0.2〜10.0モル%の第2の副成分をさらに含む、請求項1から4のいずれか1項に記載の積層セラミックキャパシタ。
- 前記第1の主成分〜第3の主成分は固溶体の形である、請求項1から5のいずれか1項に記載の積層セラミックキャパシタ。
- 誘電体層と第1の内部電極及び第2の内部電極が交互に積層されたセラミック本体と、
前記セラミック本体の両端部に形成され、前記第1の内部電極及び前記第2の内部電極と電気的に連結される第1の外部電極及び第2の外部電極と、
を含み、
前記誘電体層は誘電体磁器組成物を含み、前記誘電体磁器組成物は母材粉末を含み、前記母材粉末はキュリー温度が125℃の第1の主成分(X)、キュリー温度が450℃以上の第2の主成分(Y)及びキュリー温度が320℃以上の第3の主成分(Z)を含み、
−55℃〜175℃の範囲での静電容量変化率が+/−15%以内であり、常温での誘電率が1000以上であり、150℃で耐電圧が少なくとも50V/μmであり、常温での抵抗値が7.420E+10以上である、積層セラミックキャパシタ。 - 前記母材粉末はxX−yY−zZ(但し、x+y+z=1、x、y、zはモル(mol))で表示され、前記XとZはチタンを含み、Yはニオビウムを含む、請求項7に記載の積層セラミックキャパシタ。
- 前記xは0.5≦x≦0.97、yは0.01≦y≦0.48及びzは0.02≦z≦0.2を満たす、請求項8に記載の積層セラミックキャパシタ。
- 前記XはBaTiO3、Yは(Na,K)NbO3、Zは(Bi,Na)TiO3である、請求項8または9に記載の積層セラミックキャパシタ。
- BaCO3とTiO2を混合して第1の混合物を形成する段階と、
前記第1の混合物を900〜1000℃の範囲でか焼してBaTiO3を形成する段階と、
Na2O、K2OとNb2O3を混合して第2の混合物を形成する段階と、
前記第2の混合物を800〜900℃の範囲でか焼して(Na0.5K0.5)NbO3を形成する段階と、
Bi2O3、Na2CO3とTiO2を混合して第3の混合物を形成する段階と、
前記第3の混合物を800〜900℃の範囲でか焼して(Bi0.5Na0.5)TiO3を形成する段階と、
BaTiO3と(Na0.5K0.5)NbO3及び(Bi0.5Na0.5)TiO3を混合して母材粉末を形成する段階と、
を含む、誘電体磁器組成物の製造方法。 - 前記母材粉末は、xBaTiO3−y(Na,K)NbO3−z(Bi,Na)TiO3(但し、x+y+z=1、x、y、zはモル(mol))で表示され、前記xが0.5≦x≦0.97、yが0.01≦y≦0.48及びzが0.02≦z≦0.2を満たす、請求項11に記載の誘電体磁器組成物の製造方法。
- 前記誘電体磁器組成物は、前記母材粉末100モル%に対して、Mn、V、Cr、Fe、Ni、Co、Cu及びZnのうち少なくとも一つを含む酸化物又は炭酸塩である0.1〜3.0モル%の第1の副成分をさらに含む、請求項11または12に記載の誘電体磁器組成物の製造方法。
- 前記誘電体磁器組成物は、前記母材粉末100モル%に対して、Siを含む酸化物又はSiを含むガラス(Glass)化合物である0.2〜10.0モル%の第2の副成分をさらに含む、請求項11から13のいずれか1項に記載の誘電体磁器組成物の製造方法。
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