JP5317538B2 - 誘電体磁器およびコンデンサ - Google Patents
誘電体磁器およびコンデンサ Download PDFInfo
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- JP5317538B2 JP5317538B2 JP2008146533A JP2008146533A JP5317538B2 JP 5317538 B2 JP5317538 B2 JP 5317538B2 JP 2008146533 A JP2008146533 A JP 2008146533A JP 2008146533 A JP2008146533 A JP 2008146533A JP 5317538 B2 JP5317538 B2 JP 5317538B2
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- 239000003990 capacitor Substances 0.000 title claims description 26
- 229910052573 porcelain Inorganic materials 0.000 title description 5
- 239000013078 crystal Substances 0.000 claims description 59
- 239000000919 ceramic Substances 0.000 claims description 56
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 52
- 239000002245 particle Substances 0.000 claims description 49
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims description 39
- 229910002113 barium titanate Inorganic materials 0.000 claims description 39
- 229910052788 barium Inorganic materials 0.000 claims description 25
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 25
- 239000011777 magnesium Substances 0.000 claims description 20
- 239000011572 manganese Substances 0.000 claims description 17
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 15
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims description 15
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 14
- 239000004020 conductor Substances 0.000 claims description 14
- 229910052749 magnesium Inorganic materials 0.000 claims description 14
- 229910052691 Erbium Inorganic materials 0.000 claims description 11
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 11
- 229910052689 Holmium Inorganic materials 0.000 claims description 11
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 11
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 claims description 11
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims description 11
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 claims description 11
- 229910052748 manganese Inorganic materials 0.000 claims description 11
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 10
- 229910052771 Terbium Inorganic materials 0.000 claims description 10
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 claims description 10
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 claims description 10
- 239000010936 titanium Substances 0.000 claims description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 9
- 229910052719 titanium Inorganic materials 0.000 claims description 9
- 239000006104 solid solution Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 description 49
- 230000010287 polarization Effects 0.000 description 36
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 30
- 238000010304 firing Methods 0.000 description 16
- 239000000203 mixture Substances 0.000 description 16
- 238000005259 measurement Methods 0.000 description 8
- 238000002441 X-ray diffraction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000011812 mixed powder Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 239000003985 ceramic capacitor Substances 0.000 description 4
- 230000001747 exhibiting effect Effects 0.000 description 4
- 230000005621 ferroelectricity Effects 0.000 description 4
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 4
- 239000008188 pellet Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 3
- 238000009616 inductively coupled plasma Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000002269 spontaneous effect Effects 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 101100513612 Microdochium nivale MnCO gene Proteins 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- GPGMRSSBVJNWRA-UHFFFAOYSA-N hydrochloride hydrofluoride Chemical compound F.Cl GPGMRSSBVJNWRA-UHFFFAOYSA-N 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- XMWCXZJXESXBBY-UHFFFAOYSA-L manganese(ii) carbonate Chemical compound [Mn+2].[O-]C([O-])=O XMWCXZJXESXBBY-UHFFFAOYSA-L 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Description
ムを構成するバリウム1モルに対して、前記マグネシウムをMgO換算で0.01〜0.06モル、前記希土類元素(RE)をREO3/2換算で0.0007〜0.03モル、前記マンガンをMnO換算で0.0002〜0.03モル含有するとともに、さらに前記チタン酸バリウム100質量部に対して、前記イッテルビウムをYb2O3換算で3.6〜52.1質量部含有し、かつ前記結晶粒子の平均粒径が0.05〜0.2μmであることを特徴とする。
評価試料を以下のようにして作製した。先ず、いずれも純度が99.9%のBaCO3粉末、TiO2粉末、MgO粉末、Gd2O3粉末、MnCO3粉末を用意し、表1に示す割合で調合し混合粉末を調製した。なお、表1に示すマグネシウム(Mg)、ガドリニウム(Gd)およびマンガン(Mn)の量は、それぞれMgO、GdO3/2およびMnOに相当する量である。チタン(Ti)はバリウム(Ba)1モルに対するモル比である。
次に、実施例1に示した各組成のうち添加成分であるGd2O3をTb2O3に変えた以外は、実施例1と同様の方法で試料を作製し評価した(試料No.2−1〜2−34)。
次に、実施例1に示した各組成のうち添加成分であるGd2O3をDy2O3に変えた以外は、実施例1と同様の方法で試料を作製し評価した(試料No.3−1〜3−35)。
次に、実施例1に示した各組成のうち添加成分であるGd2O3をHo2O3に変えた以外は、実施例1と同様の方法で試料を作製し評価した(試料No.4−1〜4−35)。
次に、実施例1に示した各組成のうち添加成分であるGd2O3をEr2O3に変えた以外は、実施例1と同様の方法で試料を作製し評価した(試料No.5−1〜5−34)。
12 外部電極
13 誘電体層
14 導体層
Claims (3)
- チタン酸バリウムを主成分とし、マグネシウム、ガドリニウム,テルビウム,ディスプロシウム,ホルミウムおよびエルビウムから選ばれる少なくとも1種の希土類元素(RE)、マンガン、ならびにイッテルビウムが固溶し、結晶構造が立方晶系の結晶粒子と、該結晶粒子間に形成された粒界相とからなり、前記チタン酸バリウムを構成するバリウム1モルに対して、前記マグネシウムをMgO換算で0.01〜0.06モル、前記希土類元素(RE)をREO3/2換算で0.0007〜0.03モル、前記マンガンをMnO換算で0.0002〜0.03モル含有するとともに、さらに前記チタン酸バリウム100質量部に対して、前記イッテルビウムをYb2O3換算で3.6〜52.1質量部含有し、かつ前記結晶粒子の平均粒径が0.05〜0.2μmであることを特徴とする誘電体磁器。
- 前記チタン酸バリウムを構成するバリウム1モルに対して、前記マグネシウムをMgO換算で0.017〜0.023モル、前記希土類元素(RE)をREO 3/2 換算で0.0015〜0.01モル、前記マンガンをMnO換算で0.01〜0.013モル含有するとともに、前記チタン酸バリウム100質量部に対して、前記イッテルビウムをYb2O3換算で6.3〜15.6質量部含有し、かつ前記チタン酸バリウムを構成するバリウム1モルに対するチタン比が0.97〜0.98であることを特徴とする請求項1に記載の誘電体磁器。
- 請求項1または2に記載の誘電体磁器からなる誘電体層と導体層との積層体から構成されていることを特徴とするコンデンサ。
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