CN1053517C - 高性能中温烧结片式多层瓷介电容器瓷料 - Google Patents
高性能中温烧结片式多层瓷介电容器瓷料 Download PDFInfo
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- CN1053517C CN1053517C CN96117343A CN96117343A CN1053517C CN 1053517 C CN1053517 C CN 1053517C CN 96117343 A CN96117343 A CN 96117343A CN 96117343 A CN96117343 A CN 96117343A CN 1053517 C CN1053517 C CN 1053517C
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- 229910052573 porcelain Inorganic materials 0.000 title claims description 16
- 239000003985 ceramic capacitor Substances 0.000 title claims description 8
- 238000005245 sintering Methods 0.000 claims abstract description 8
- 239000005368 silicate glass Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000003990 capacitor Substances 0.000 abstract description 2
- 239000013078 crystal Substances 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract description 2
- 230000007704 transition Effects 0.000 abstract description 2
- 229910010293 ceramic material Inorganic materials 0.000 abstract 3
- 229910002113 barium titanate Inorganic materials 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000005385 borate glass Substances 0.000 abstract 1
- 238000005266 casting Methods 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- ZXNKRXWFQRLIQG-UHFFFAOYSA-N silicon(4+);tetraborate Chemical compound [Si+4].[Si+4].[Si+4].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-] ZXNKRXWFQRLIQG-UHFFFAOYSA-N 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 7
- 238000010304 firing Methods 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910052797 bismuth Inorganic materials 0.000 description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000018199 S phase Effects 0.000 description 1
- 241001336250 Syllides tam Species 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000007766 curtain coating Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000005621 ferroelectricity Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010532 solid phase synthesis reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
一种中温烧结式多层瓷介电容器瓷料,其以BaTiO3为主晶相,用2Bi2O3·3TiO2来调整及降低瓷料的烧成温度,同时加入低溶物硅硼酸玻璃,且加入过渡元素氧化物。本发明流延制得的膜片光平、透光均匀、无针孔、气泡、龟裂现象,其介质常数(20度)=2600,介质损耗≤120×10-4;绝缘电阻率ρν>1012Ω·cm;电容量温度变化率(-55~+125度≤±10%,适合生产线应用。
Description
本发明涉及一种电容器瓷料,特别是多层片状瓷介电容器瓷料。
中温烧结多层片状瓷介电容器,其烧成过程是瓷料与内电极一起烧成,这就要求内电极的熔点必须高于瓷料的烧成温度,用贵金属Pt.Pd等作内电极成本高,用Pd-Ag.Au等电极材料,成本较低,但要求介质瓷料的烧温必须低于1160度,才能与介质瓷料相匹配。
有采用铁电材料BaTiO3为主晶相的瓷料,来提高介电常数和介电性能,但由于它的工艺性能差、电气性能仍达不到要求,无法实际生产应用。
本发明的目的是克服现有技术中的缺点,提供一种高性能中温烧结片式多层瓷介电容器瓷料,其制成的多层片状瓷介电容器,产品一致性好、成品率高、介电性能优良,满足生产线应用。
本发明的配方(重量比)组成为:
BaTiO3 86.0~93.0% (wt)
Bi2O3 2.5~8.5% (wt)
TiO2 1.6~3.5% (wt)
Nb2O5 0.7~2.0% (wt)
MnO2 0.8~2.0% (wt)
硅酸铅玻璃 1.0~3.0%
其中硅酸铅玻璃的组成(重量比)为:
Pb3O4 67~80%
SiO2 1~4%
H3BO3 15~22%
ZnO 3~7%
最佳配方组成为:(重量比)
BaTiO3 88~90%
Bi2O3 5~6%
TiO2 2.2~2.6%
Nb2O5 0.8~1.4%
MnO2 0.12~0.14%
硅酸铅玻璃 1.2~2.3%
本发明最佳比例配方(重量百分比),如下:
材料样 名称品号 | BaTiO3 | Bi2O3 | TiO2 | Nb2O5 | MnO2 | 硅酸铅玻璃 |
12345678 | 8687888890909393 | 6.56.55.55.54.04.02.02.0 | 3.53.23.23.22.82.61.51.5 | 1.861.351.41.31.20.881.01.0 | 0.140.150.100.140.150.120.10.18 | 2.01.81.81.861.852.42.42.32 |
将上述1至8的样品均在箱式炉中焙烧,焙烧温度列于下表,并列出它们的电气性能。
样品 | ε | DF(×10-4) | IR(MΩ) | ΔC/C | 焙烧温度(℃) |
12 | 23002300 | <80<80 | >105>105 | <±15%<±15% | 11201120 |
3 | 2350 | <90 | >105 | <±15% | 1130 |
45 | 24002600 | <90<100 | >105>105 | <±15%<±15% | 11301130 |
6 | 2300 | <100 | >105 | <±15% | 1130 |
45 | 24002600 | <120<120 | >5×105>5×105 | <±15%<±15% | 11401140 |
本瓷料是以BaTiO3为主晶相,用2Bi2O3.3TiO2的铋层结构来调整及降低瓷料的烧成温度,同时加入低溶物硅硼酸玻璃,加过渡元素氧化物。
上述BaTiO3是采用固相法合成的BaO/TiO2的摩尔比是1来
高温制备的,具体用: 合成温度在1200度~1280度,保温2小时。
将上述配方经一定比例称取,经超细球磨成超细粉粒(D50<1μm),获得合适的颗粒度和混合均匀的,电性能合格的瓷粉。
本发明属BaTiO3-2Bi2O3·3TiO3系材料,BaTiO3具有强的铁电性,有很高的介电常数,从附图1可知峰值可达5000~6000,且居里温度在100度,Tc—居里温度。由于本发明加入铋层化合物,即2Bi2O3.3TiO2来调整容量温度特性及降低瓷料的烧成温度;加入的铋层化合物是一种低介相,也是低溶相,介质在高温动力作用下,高介的BaTiO3的铁电相晶粒会被这低相包裹着,铁电相的电致应变必然受到抑制,因而居里峰也必然受到压抑,如附图2,陶瓷模拟结构,其中1-低ε相Bi4(Ti3O12),2-高ε相BaTiO3。
加入Bi2O3·nTiO2的铋层结构的化合物来降低BaTiO2为主的瓷料烧成温度及改善瓷料的容量温度特性,如附图3所示,随着铋层化合物含量的增加,烧成温度随之下降,当其量达0.05左右时,随着含量的增加,烧成温度变化不明显,而介电常数随含量增加而降低。
本发明与美国TAM公司该型号瓷料主要性能比较,见附图3、附图4。
本发明流延制得的膜片光平、透光均匀,无针孔、气泡、龟裂现象。其介电常数(20度)=2600;介质损耗≤120×10-4;绝缘电阻率ρυ>1012Ω·cm;电容量温度变化率(-55~+125度)≤±10%,适合生产线应用。
本说明书所述度数为摄氏度数。
Claims (2)
1.一种中温烧结片式多层瓷介电容器瓷料,其特征在于其配方组成(重量比)为:
BaTiO3 86.0~93.0% (wt)
Bi2O3 2.5~8.5% (wt)
TiO2 1.6~3.5% (wt)
Nb2O5 0.7~2.0% (wt)
MnO2 0.8~2.0% (wt)
硅酸铅玻璃 1.0~3.0% (wt)
其中硅酸铅玻璃的组成(重量比)为:
Pb3O4 67~80% (wt)
SiO2 1~4% (wt)
H3BO3 15~22% (wt)
ZnO 3~7% (wt)
2.根据权利要求1所述的中温烧结片式多层瓷介电容器瓷料,其特征在于所述最佳配方组成为:(重量比)
BaTiO3 88~90% (wt)
Bi2O3 5~6% (wt)
TiO2 2.2~2.6% (wt)
Nb2O5 0.8~1.4% (wt)
MnO2 0.12~0.14%(wt)
硅酸铅玻璃 1.2~2.3% (wt)
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CN96117343A CN1053517C (zh) | 1996-12-24 | 1996-12-24 | 高性能中温烧结片式多层瓷介电容器瓷料 |
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CN1186313A CN1186313A (zh) | 1998-07-01 |
CN1053517C true CN1053517C (zh) | 2000-06-14 |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN86103391A (zh) * | 1985-05-03 | 1986-10-29 | 谭氏陶器有限公司 | 具有高介电常数和平坦的温度系数特性的介质陶瓷配方 |
CN1067037A (zh) * | 1992-05-11 | 1992-12-16 | 上海无线电六厂 | 高介电常数、高稳定、低损耗的陶瓷介质材料及制造方法 |
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- 1996-12-24 CN CN96117343A patent/CN1053517C/zh not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN86103391A (zh) * | 1985-05-03 | 1986-10-29 | 谭氏陶器有限公司 | 具有高介电常数和平坦的温度系数特性的介质陶瓷配方 |
CN1067037A (zh) * | 1992-05-11 | 1992-12-16 | 上海无线电六厂 | 高介电常数、高稳定、低损耗的陶瓷介质材料及制造方法 |
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