JPWO2013031940A1 - フェライト磁器組成物、セラミック電子部品、及びセラミック電子部品の製造方法 - Google Patents
フェライト磁器組成物、セラミック電子部品、及びセラミック電子部品の製造方法 Download PDFInfo
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- 239000000919 ceramic Substances 0.000 title claims abstract description 84
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 52
- 239000000203 mixture Substances 0.000 title claims description 32
- 229910052573 porcelain Inorganic materials 0.000 title claims description 19
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000000463 material Substances 0.000 claims abstract description 31
- 229910052760 oxygen Inorganic materials 0.000 claims description 37
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 36
- 239000001301 oxygen Substances 0.000 claims description 36
- 150000001875 compounds Chemical class 0.000 claims description 35
- 238000010304 firing Methods 0.000 claims description 26
- 229910052742 iron Inorganic materials 0.000 claims description 20
- 229910052748 manganese Inorganic materials 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 2
- 239000004020 conductor Substances 0.000 abstract description 16
- 229910017518 Cu Zn Inorganic materials 0.000 abstract description 4
- 229910017752 Cu-Zn Inorganic materials 0.000 abstract description 4
- 229910017943 Cu—Zn Inorganic materials 0.000 abstract description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- GEYXPJBPASPPLI-UHFFFAOYSA-N manganese(III) oxide Inorganic materials O=[Mn]O[Mn]=O GEYXPJBPASPPLI-UHFFFAOYSA-N 0.000 abstract 1
- 239000010949 copper Substances 0.000 description 98
- 238000009413 insulation Methods 0.000 description 22
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- 230000007423 decrease Effects 0.000 description 9
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000001354 calcination Methods 0.000 description 6
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- 238000010344 co-firing Methods 0.000 description 5
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- 229910002077 partially stabilized zirconia Inorganic materials 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
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- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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- 229910001252 Pd alloy Inorganic materials 0.000 description 1
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- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 description 1
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- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
次に、Fe、Mn、Cu、Zn、及びMgの含有モル量を、Fe2O3、Mn2O3、CuO、ZnO、及びMgOに換算し、上述の範囲にした理由を詳述する。
Fe2O3を化学量論組成から減量させ、Feの一部をMnで置換する形態でMn2O3を含有させることにより、比抵抗ρが低下するのを回避でき、絶縁性の向上を図ることができる。
Ni−Cu−Zn系フェライトでは、融点が1026℃と低いCuOを含有させることにより、より低温での焼成が可能となり、焼結性を向上させることができる。そして、そのためにはCuをCuOに換算し、少なくとも0.5mol%以上含有させる必要がある。
Zn酸化物であるZnOはフェライト磁器組成物の透磁率向上に寄与する効果があるが、斯かる効果を発揮するためにはZnはZnOに換算し、少なくとも1.0mol%以上含有させる必要である。また、Znの含有モル量がZnOに換算し1.0mol%未満になると、Cu−Cu2Oの平衡酸素分圧以下の還元性雰囲気で焼成を行なうと、焼結性が低下し、吸水率が上昇して好ましくない。
高価なNiOを比較的安価なMgOで置換することにより、NiOの含有モル量を低減できることから低コスト化が可能となる。また、MgOは、磁歪定数が小さく、磁歪定数の大きいNiOの一部をMgOで置換することにより、コイル部品の応力依存性を低減することができる。そして、その効果を得るためには、Mgの含有モル量は、MgOに換算し、少なくとも5.0mol%以上は必要がある。
3コイル導体(導電部)
Claims (7)
- 少なくともFe、Mn、Cu、Zn、Mg、及びNiを含有したフェライト磁器組成物であって、
FeをFe2O3に換算したときの含有モル量xmol%、及びMnをMn2O3に換算したときの含有モル量ymol%を(x,y)で表したときに、(x,y)が、A(25,1)、B(47,1)、C(47,7.5)、D(46,7.5)、E(46,10)、F(30,10)、G(30,7.5)、及びH(25,7.5)で囲まれる領域にあり、
かつ、Cuの含有モル量がCuOに換算して0.5〜10.0mol%であり、Znの含有量がZnOに換算して1.0〜35.0mol%であり、Mgの含有量がMgOに換算して5.0〜35.0mol%であることを特徴とするフェライト磁器組成物。 - フェライト材料からなる磁性体部と、Cuを主成分とする導電部とを有し、
前記磁性体部が請求項1記載のフェライト磁器組成物で形成されていることを特徴とするセラミック電子部品。 - Cu−Cu2Oの平衡酸素分圧以下の雰囲気で焼成されてなることを特徴とする請求項2記載のセラミック電子部品。
- 前記磁性体部と前記導電部とが同時焼成されてなることを特徴とする請求項2又は請求項3記載のセラミック電子部品。
- 複数の前記磁性体部と複数の前記導電部とが交互に積層されていることを特徴とする請求項2乃至請求項4のいずれかに記載のセラミック電子部品。
- 積層コイル部品であることを特徴とする請求項2乃至請求項5のいずれかに記載のセラミック電子部品。
- FeをFe2O3に換算したときの含有モル量xmol%、及びMnをMn2O3に換算したときの含有モル量ymol%を(x,y)で表したときに、(x,y)が、A(25,1)、B(47,1)、C(47,7.5)、D(46,7.5)、E(46,10)、F(30,10)、G(30,7.5)、及びH(25,7.5)で囲まれる領域を満たし、かつ、Cuの含有モル量がCuOに換算して0.5〜10.0mol%、Znの含有モル量がZnOに換算して1.0〜35.0mol%、Mgの含有モル量がMgOに換算して5.0〜35.0mol%となるようにFe化合物、Mn化合物、Cu化合物、Zn化合物、Mg化合物、及びNi化合物を秤量し、これら秤量物を混合した後、仮焼して仮焼粉末を作製する仮焼工程と、
前記仮焼粉末からセラミック薄層体を作製するセラミック薄層体作製工程と、
Cuを主成分とする所定パターンの導電膜を前記セラミック薄層体上に形成する導電膜形成工程と、
前記導電膜が形成されたセラミック薄層体を所定順序に積層し、積層体を形成する積層体形成工程と、
Cu−Cu2Oの平衡酸素分圧以下の焼成雰囲気で前記積層体を焼成し、前記セラミック薄層体と前記導電膜とを同時焼成する焼成工程とを含んでいることを特徴とするセラミック電子部品の製造方法。
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