TW559841B - Ceramic-material, ceramic several-layers-component with said ceramic-material and method to produce the component - Google Patents

Ceramic-material, ceramic several-layers-component with said ceramic-material and method to produce the component Download PDF

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Publication number
TW559841B
TW559841B TW91111667A TW91111667A TW559841B TW 559841 B TW559841 B TW 559841B TW 91111667 A TW91111667 A TW 91111667A TW 91111667 A TW91111667 A TW 91111667A TW 559841 B TW559841 B TW 559841B
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Taiwan
Prior art keywords
ceramic
ceramic material
layer
patent application
component
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Application number
TW91111667A
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English (en)
Inventor
Guenther Pfeiler
Christl Mead
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Epcos Ag
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/6303—Inorganic additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B18/00—Layered products essentially comprising ceramics, e.g. refractory products
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
    • C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
    • C04B35/465—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates
    • C04B35/468—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates
    • C—CHEMISTRY; METALLURGY
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    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
    • C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
    • C04B35/465—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates
    • C04B35/468—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates
    • C04B35/4686—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates based on phases other than BaTiO3 perovskite phase
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/018—Dielectrics
    • H01G4/06—Solid dielectrics
    • H01G4/08—Inorganic dielectrics
    • H01G4/12—Ceramic dielectrics
    • H01G4/1209—Ceramic dielectrics characterised by the ceramic dielectric material
    • H01G4/1218—Ceramic dielectrics characterised by the ceramic dielectric material based on titanium oxides or titanates
    • H01G4/1227—Ceramic dielectrics characterised by the ceramic dielectric material based on titanium oxides or titanates based on alkaline earth titanates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00—Metals, their alloys or their compounds
    • B32B2311/02—Noble metals
    • B32B2311/08—Silver
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3232—Titanium oxides or titanates, e.g. rutile or anatase
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3262—Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
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  • Ceramic Engineering (AREA)
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  • Inorganic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Ceramic Capacitors (AREA)

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559841 五、發明說明（1 ) 本發明涉及陶瓷材料，其含有鈦酸鋇。本發明亦涉及 一種含有陶瓷材料之陶瓷多層組件及其製造方法。 陶瓷材料已爲人所知，其適合用來製造多層電容器且 具有大約是50或更大之介電常數ε。這些陶瓷材料之缺 點是：由於較大之介電常數，則製造電容値很小之多層 電容是困難的。 由 Mhaisalkar，S.G.;Ready, D.W;Akbar，S.A·;等人所 寫之文件”Mic rowave Dielectric Properties of Doped BaTi409”；J.Am· Ceram. Soc.74[8]( 1 99 1 ) 1 894- 1 898 中已 知一些陶瓷材料，其具有低的介電常數ε = 35且除了 BaTi4〇9之外仍含有Μη02或BaCo3。這些陶瓷材料之缺 點是：其必須在大於120(TC之很高之燒結溫度中進行燒 結且因此不可使用銀成份較高之內電極，此乃因純銀之 熔點是1 0 8 3 °C。在以這些習知之陶瓷材料來製造多層式 電容器時各內電極所需之材料成本會較高，內電極通常 是由銀及鉛所構成之混合物，其中Ag/Pt之混合比（ratio) 是5 0/5 0。但鈿是昂貴的，因此成本很高。 本發明之目的是提供一種陶瓷材料’其具有較低之介 電常數。 本發明中此目的以申請專利範圍第1項之陶瓷材料來 達成。本發明有利之其它形式，具有本發明之陶瓷材料 之陶瓷多層組件及其製造方法描述在申請專利範圍各附 屬項中。 559841 五、發明說明（2) 本發明中之陶瓷組件含有鈦酸鋇（BaTi4〇9)及另外含有 0.1至0.5重量百分比之Μη203 ° 藉由添加Μη203，則以鈦酸鋇爲主之陶瓷材料即具有 較低之介電常數（其介於3 5和3 8之間）。因此，在製造 多層式電容器時可輕易地設定較小之電容値，就此種電 容器之厚度（有效之介電質）及其面積（決定該有效之電容 器板之面積）而言所使用之各層不必遵守一種很精確之 尺寸精確度。 在本發明有利之實施形式中，陶瓷材料另含有一種 Nd2〇3成份，其未超過〇·2重量百分比。 藉由添加Nd203，則可達成之優點是：本發明之陶瓷材 料具有所謂”COG特性”。 本發明亦提供一種陶瓷多層組件，其層堆疊是由交替 地重疊配置之電極層及介電質層所構成且介電質層含有 本發明之陶瓷材料。此種陶瓷多層組件例如可以是多層 電容器，其中各介電質層形成介電質。各電極層即爲電 容器板。藉由適當地配置各外電極（其是與電極層相接 觸），則可使多個單一電容器並聯。 若陶瓷材料含有0.2至1 ·5重量百分比之Ag20成 份，則這樣是有利的。藉由陶瓷材料以銀來作適當之摻 雜，則銀由本發明之多層陶瓷之電極層向外擴散之現象 可降低。可使用銀作爲本發明之陶瓷多層組件之各電極 層用之材料。本發明之陶瓷材料若未添加Ag20來進行 559841 五、發明說明（3) 摻雜，則各電極層中所存在之銀可大量地擴散至陶瓷 中，這樣會使各電極層不穩定。 電極金屬之已減小之擴散現象允許電容器可被製成， 此時在介電質層之厚度介於5和60 // m之間時，電極層 厚度最大是1 . 5 μ m時即足夠在燒結之後保持一種均勻 而連續之電極層。 這些薄電極層之優點是：除了較少之材料損耗（其特別 是在使用貴金屬（例如，銀或鈀）時很重要）之外，由於電 極層及介電質層之收縮特性之差異很小而使積層 (Delamination)變小。此外，厚度較小之電極層所具有 之優點是：在電容器之電容相同時體積之使用率較高。 又，當陶瓷材料含有1至1〇重量百分比之Bi4Ti3012 時是有利的。鈦酸鉍具有燒結輔助劑之功能。藉由添加 一種燒結輔助劑至陶瓷材料’則可達成之優點是：陶瓷 材料在燒結時之燒結溫度可下降至1 000至I200°c之 間，這樣可使電極層中之銀成份較局。 因此，多層組件是特別有利的’其中電極層包含一種 由銀及鈀（重量比是Ag/Pd = 80/20)所形成之混合物。電 極層中較高之銀成份可藉由下述方式達成：陶瓷材料中 以Ag20來摻雜以及藉由燒結輔助劑使燒結溫度下降。 若燒結溫度未下降，則鈀成份須較高’此乃因鈀在較銀 還高之溫度時才會溶化。但較高之鈀成份會使此種組件 製造時之成本較高。
559841 五、 發明說明 ( 4) 陶 瓷 材 料 之 製 造方法例如包含以下各步驟： a) 製 成 一 由 多 種適當之原始材料所形成之混合物。 b) 在 1 00 0和 1 1 5 0 °C之間之溫度對該混合物進行轉換 約 1 至 5 小 時之久。 c) 使 已 轉 換 之 混合物被磨細。 下 述 之 其 它 步 驟亦是可能的： d) 由 已 轉 換 之 混合物製成一種沈積物。 e) 添 加 Ba4Ti3 〇12及Ag02至沈積物。 此 外 本 發 明 亦提供陶瓷多層組件之製造方法，其中 對 由 重 疊 配 置 之 陶瓷原箔（其BaTi4〇9具有1至l〇Wt% 之 B i 4 T i 3 0 ! 2成份）及電極層所構成之堆疊進行燒結且此 種 燒 結 在 溫 度 1 0 0 0至1 1 5 0 °c時進行。 本 發 明 之 方 法 可藉由燒結輔助劑之添加來達成。這樣 所 具 有 之 優 點 是 :燒結溫度可保持較低，因此可使用之 電 極 層 除 了 鈀 以 外亦可含有相當多之銀成份。特別是可 使 用 Ag/Pd 比 (rc itio)是在7 0/3 0和80/20之間之電極 層 〇 本 發 明 以 下 將 依據實施例及圖式來詳述。圖式簡單說 明 ； 第 1 圖 本 發 明 陶瓷多層組件之橫切面。 第 2 圖 本 發 明 之組件之電容之溫度特性之圖解。 第 1 圖 是 -- 種 電容器，其是可表面安裝之組件（SMD) 且 具 有 互 相 重 疊 之電極層1，各電極層1含有電極金屬 -6- 559841 五、發明說明（5) 且藉由陶瓷材料所形成之介電質層2而互相隔開。在電 容器之正面上配置各金屬層3，其中每一電極層1恰巧 與各金屬層3之一在電性上相連。金‘屬層3例如可以是 由銀，鎳及錫所構成之層堆疊，其可特別容易焊接，其 中錫層是最外層，其以電鍍方式沈積在鎳層上。 本發明之陶瓷材料特別適合用來製成多層式電容器， 其幾何大小是0 · 6 nim長，0.8刪1寬及1 .2 ± 0 .1 mm高且電容 是 0.5 〜1 OOPF ° 介電質層可由陶瓷材料（其含有鈦酸鋇及0.2重量百 分比之Μη304)所製成。 由鈦酸鋇開始，以5個內電極及介於其間之陶瓷層來 製成一種多層式電容器，其中陶瓷層由本發明之陶瓷成 份所構成，其包含0.2Wt%之Μη203及O.lWt%之 Nd203。另須對此多層式電容器測定各種不同之電性額 定資料。卜表顯不電容C之電性額定資料，例如，損耗 角度tan5，介電常數ε及-55°C及125°C時電容値相對於 25 t (TKC)時電容値之相對改變率。 表：電容器或本發明之陶瓷之電性額定資料 C TPF1 T an δ [xlO·3] ε TKC(-55 °C ) TKC(125 °C ) 151.68 0.85 38.6 0.1 6 % -0 · 0 6 % 此表顯示：本發明之陶瓷材料所具有之介電常數是 38.6 第2圖是上表中該電容器之電容對溫度之相對改變 559841 五、發明說明（6) 符號說明 1 ...電極層 2...介電質層 3 ...金屬層

Claims (1)

  1. 559841
    θ 餺 # 六、申請專利範圍 第9 1 1 1 1 667號「陶瓷材料，陶瓷多層組件及其製造方法 」專利案 (9 2年7月修正） 六申請專利範圍： 1· 一種以BaTi 409爲主之陶瓷材料，其另外包含0.1至 〇·5重量百分比之Μη203及可達〇·2重量百分比之 Nd2〇3 〇 2.如申請專利範圍第1項之陶瓷材料，其中陶瓷材料另 含有可達2重量百分比之Ag2〇。 3·如申請專利範圍第1或 2項之陶瓷材料，其中陶瓷 材料另含有1至10重量百分比之Bi4Ti3012作爲燒結 輔助劑。 4. 一種陶瓷多層組件，其層堆疊是由交替重疊配置之電 極層（1)及介電質層（2)所構成，其特徵爲：介電質層 (2 )含有一種如申請專利範圍第1至3項中任一項之 陶瓷材料。 5·如申請專利範圍第4項之組件，其中電極層（1 )含有 一由銀及鈀所構成之混合物，其重量比（rati0)Ag/Pd 是介於70/30及80/20之間。 6.如申請專利範圍第4或5項之組件’其中各電極層在 層堆疊之外側上是與金屬層（3 )相接觸’相鄰之各電 極層（1)是與不同之金屬層（3)相接觸，層堆疊之外部 尺寸未超過1.5 _高，1.6 _寬及2 nun長’在各金屬 559841 六、申請專利範圍 層（3)之間所測得之電容未超過100PF。 7. —種陶瓷多層組件之製造方法，其特徵爲：由重疊配 置之陶瓷原箔（其含有BaTi4〇9及1至1〇重量百分比 之B i 4T i 30i 2以作爲燒結輔助劑且配置在其各電極層 (1 )之間）所構成之堆疊須進行燒結且此種燒結是在 1 000至1150°C之間進行。
TW91111667A 2001-07-06 2002-05-31 Ceramic-material, ceramic several-layers-component with said ceramic-material and method to produce the component TW559841B (en)

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