JP2012529412A - 銅内電極と整合する耐還元性高周波低温焼結セラミック媒体材料 - Google Patents
銅内電極と整合する耐還元性高周波低温焼結セラミック媒体材料 Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 55
- 239000010949 copper Substances 0.000 title claims abstract description 40
- 239000000919 ceramic Substances 0.000 title claims abstract description 38
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 35
- 239000013078 crystal Substances 0.000 claims abstract description 20
- 239000000654 additive Substances 0.000 claims abstract description 17
- 230000004907 flux Effects 0.000 claims abstract description 17
- 230000000996 additive effect Effects 0.000 claims abstract description 15
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 11
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 claims abstract description 6
- 229910010413 TiO 2 Inorganic materials 0.000 claims abstract description 6
- 229910018068 Li 2 O Inorganic materials 0.000 claims abstract description 5
- 239000003985 ceramic capacitor Substances 0.000 claims abstract description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 13
- 229910010293 ceramic material Inorganic materials 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 5
- 239000007772 electrode material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 12
- 238000000465 moulding Methods 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 238000005245 sintering Methods 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 239000010953 base metal Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000011267 electrode slurry Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
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- 239000012212 insulator Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- SWELZOZIOHGSPA-UHFFFAOYSA-N palladium silver Chemical compound [Pd].[Ag] SWELZOZIOHGSPA-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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Abstract
Description
本発明は、セラミック媒体材料及びそれによって得られたコンポーネントの製備方法に係り、特にCOG特性を満足し、且つ銅内電極と整合できる1つの高周波低温において焼結されたセラミック媒体材料に係る。
製品の高性能、低コストという市場ニーズにつれて、セラミックコンデンサのメーカーが生産コストを下げることもでき、より高い性能要求も満足できる代替材料を絶えず捜し求めなければならないことは、かれたちが面する重大な挑戦の1つである。現在の積層セラミックコンデンサ(以下、MLCCと称する)は既に基本的にベースメタル化が実現され、80%以上のMLCCがベースメタル内電極材料(ニッケルを主とする)によってパラジウム銀を取って代わり、略40%の生産コストを有効に下げることができる。更なる研究として、銅電極の使用が検討し始められ、その他のベースメタルに対して、銅は価格上の優勢を有するのみでなく、より重要なのは高周波分野において、銅の電気性能がより優秀であることもある。しかし、銅はニッケルと比べると、より酸化しやすく、且つ銅の融点(1083℃)がニッケルの融点(1453℃)より低く、また、当面の汎用セラミックスの焼結温度が非常に高くて、銅電極と整合されにくいため、MLCCの電気性能に影響する。もし銅を内電極の材料として使用すれば、まず要求を満足するセラミック媒体材料を必然的に獲得しなければならない。
本発明の解決しようとする技術問題は、COGセラミック媒体の特性を満足し、材料の分散性が高く、成型プロセスが良く、RoSH条例の要求を満足する1つの銅内電極と整合する耐還元性高周波低温焼結セラミック媒体材料を提供することである。
本発明の主旨は下記の通りである。MgxBa(1−x)ZrySi(1−y)O3体系を材料の主結晶相として採用し、性能を調節するように改質添加剤を加入し、且つ焼結温度の降下を助けるため焼結フラックスを加入し、慣用のプロセスを採用して所要粉体に作製し、COGセラミック媒体の特性を満足し、材料の分散性が高く、成型プロセスが良い低温焼結セラミック媒体材料を得、且つMLCC製品を作製するときに、焼結温度が低く、結晶粒の生成が均一、緻密で、製品に欠陥を有せず、または欠陥が小さい。次に実施例と合わせて本発明の内容に対しさらに詳しい説明を行い、実施例において言及する内容は本発明に対する限定でなく、材料の配合についての選択は、地元の条件により結果に対し実質上影響を与えないように適当な措置を取ることができる。
銅内電極と整合する耐還元性高周波低温焼結セラミック媒体材料であって、純度が99.5%以上の原材料を採用し、0.8molのMg(OH)2、0.8molのSiO2、0.2molのBaCO3及び0.2molのZrO2という混合比率により、均一にボールミルし、1150℃の温度において該混合物を3時間焙焼してから、主結晶相がMg0.8Ba0.2Si0.8Zr0.2O3である材料を得る。その後、所定比率により表1に示す改質添加剤と焼結フラックスを添加する。
銅内電極と整合する耐還元性高周波低温焼結セラミック媒体材料であって、純度が99.5%以上の原材料を採用し、0.9molのMg(OH)2、0.9molのSiO2、0.1molのBaCO3及び0.1molのZrO2という混合比率により、均一にボールミルし、1150℃の温度において該混合物を3時間焙焼してから、主結晶相がMg0.9Ba0.1Si0.9Zr0.1O3である材料を得る。その後、所定比率により表3に示す改質添加剤と焼結フラックスを添加する。
銅内電極と整合する耐還元性高周波低温焼結セラミック媒体材料であって、純度が99.5%以上の原材料を採用し、0.95molのMg(OH)2、0.95molのSiO2、0.05molのBaCO3及び0.05molのZrO2という混合比率により、均一にボールミルし、1150℃の温度において該混合物を3時間焙焼してから、主結晶相がMg0.95Ba0.05Si0.95Zr0.05O3である材料を得る。その後、所定比率により表5に示す改質添加剤と焼結フラックスを添加する。
Claims (6)
- 主結晶相と、改質添加剤と、焼結フラックスとから組成される銅内電極と整合する耐還元性高周波低温焼結セラミック媒体材料において、
主結晶相の構造式がMgxBa(1−x)ZrySi(1−y)O3で、そのうち、0.8≦x≦0.95、0.05≦y≦0.2で、前記改質添加剤がMnO2、CaO、Li2O、Bi2O3、TiO2のうちの1種または複数種で、前記焼結フラックスがB2O3、SiO2、ZnO、CuO、K2O、BaOのうちの1種または複数種である、ことを特徴とする銅内電極と整合する耐還元性高周波低温焼結セラミック媒体材料。 - モル百分率で、主結晶相が80〜95mol%で、改質添加剤が1.2〜10mol%で、焼結フラックスが2.5〜18mol%である、ことを特徴とする請求項1に記載の銅内電極と整合する耐還元性電極高周波低温焼結セラミック媒体材料。
- 前記主結晶相がMgxBa(1−x)ZrySi(1−y)O3で、そのうち、0.8≦x≦0.95、0.05≦y≦0.2で、比率によりMg(OH)2、BaCO3、ZrO2、SiO2で均一にボールミル混合した後、1050℃〜1170℃の温度において予備焙焼することによって作製される、ことを特徴とする請求項2に記載の銅内電極と整合する耐還元性高周波低温焼結セラミック媒体材料。
- モル百分率で、改質添加剤が銅内電極と整合する耐還元性高周波セラミック媒体材料全体における組成は、MnO2が0.2〜0.5mol%、CaOが0〜1.0mol%、Li2Oが1.0〜3.0mol%、Bi2O3が0〜5.0mol%、TiO2が0〜1.0mol%である、ことを特徴とする請求項2に記載の銅内電極と整合する耐還元性高周波低温焼結セラミック媒体材料。
- モル百分率で、前記焼結フラックスが銅内電極と整合する耐還元性高周波低温焼結セラミック媒体材料全体における組成は、B2O3が1.0〜3.0mol%、SiO2が0〜6.0mol%、ZnOが1.5〜6.0mol%、CuOが0〜1.0mol%、K2Oが0〜1.0mol%、BaOが0〜1.0mol%である、ことを特徴とする請求項2に記載の銅内電極と整合する耐還元性高周波低温焼結セラミック媒体材料。
- 該セラミック媒体材料によって作製されたセラミックコンデンサは還元雰囲気において焼結されることができ、セラミックコンデンサ内電極材料が銅を使用することができ、焼結温度が1000〜1100℃で、獲得したセラミックコンデンサの電気性能が高周波COG類セラミック材料の特性を満足することができる、ことを特徴とする請求項1〜5に記載の銅内電極と整合する耐還元性高周波低温焼結セラミック媒体材料。
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