JPH0635460Y2 - Ceramic capacitors - Google Patents
Ceramic capacitorsInfo
- Publication number
- JPH0635460Y2 JPH0635460Y2 JP14363788U JP14363788U JPH0635460Y2 JP H0635460 Y2 JPH0635460 Y2 JP H0635460Y2 JP 14363788 U JP14363788 U JP 14363788U JP 14363788 U JP14363788 U JP 14363788U JP H0635460 Y2 JPH0635460 Y2 JP H0635460Y2
- Authority
- JP
- Japan
- Prior art keywords
- reinforcing metal
- metal plate
- soldering
- voltage
- ceramic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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- Ceramic Capacitors (AREA)
Description
【考案の詳細な説明】 産業上の利用分野 本考案はセラミックコンデンサに係り、特に高電圧電力
機器用として高い雷インパルス耐電圧及びさい断波耐電
圧特性が必要とされる高電圧セラミックコンデンサの改
良に関するものである。TECHNICAL FIELD The present invention relates to a ceramic capacitor, and in particular to an improvement of a high-voltage ceramic capacitor that requires high lightning impulse withstand voltage and high cut-off voltage withstand characteristics for high-voltage power equipment. It is about.
従来の技術 一般に、この種のセラミックコンデンサにおいては高電
圧の印加に伴って逆圧電効果の影響でセラミック素体に
さい断波が加わることにより圧電現象で機械的エネルギ
ーが内部に発生し、その機械的エネルギーによる応力が
セラミック素体の破壊応力を上回ると機械的破壊を発生
し、更には絶縁破壊を惹起することが知られている。2. Description of the Related Art Generally, in this type of ceramic capacitor, mechanical energy is internally generated by a piezoelectric phenomenon when a breaking wave is applied to the ceramic element body due to the influence of the inverse piezoelectric effect with the application of a high voltage. It is known that when the stress due to static energy exceeds the fracture stress of the ceramic body, mechanical breakdown occurs and further dielectric breakdown occurs.
この絶縁破壊の発生を防止するべく、従来、円板の厚み
と直径との比を一定値に設定したセラミック素体を用
い、その両端面に形成する電極層の少なくとも片面に所
定値以上の直径を持つ端子板兼用の補強金属板を当接さ
せて半田付け固定することによりセラミック素体を堅牢
に保持することが提案されている（特開昭56−48124
号）。In order to prevent the occurrence of this dielectric breakdown, conventionally, a ceramic body in which the ratio of the thickness and the diameter of the disk is set to a constant value is used, and the diameter of a predetermined value or more is applied to at least one surface of the electrode layer formed on both end surfaces thereof. It has been proposed to firmly hold a ceramic body by abutting a reinforcing metal plate also serving as a terminal plate having a contact and fixing it by soldering (JP-A-56-48124).
issue).
唯、この補強金属板を半田付け固定する際に補強金属板
の半田付け面が全く平面状であると半田付け時のフラッ
クスが板中央側で抜け切れない事態が生ずる。その場合
にはセラミック素体と補強金属板の界面である半田付け
部が気泡で巣状になってセラミック素体を十分に接続固
定できないため、上述したセラミックコンデンサでは補
強金属板の半田付け面に放射状及び同心円状に凹溝を設
け、或いは多数の透孔を板面に散在させて設けることに
より半田を流れ易くすることが行われている。However, when the reinforcing metal plate is fixed by soldering, if the soldering surface of the reinforcing metal plate is completely flat, the flux at the time of soldering may not completely escape from the center side of the plate. In that case, the soldering part, which is the interface between the ceramic body and the reinforcing metal plate, becomes a nest of bubbles, and the ceramic body cannot be sufficiently connected and fixed. Radial and concentric concave grooves are provided, or a large number of through holes are provided scattered on a plate surface to facilitate solder flow.
考案が解決しようとする課題 然し、この補強金属板の半田付け面に凹溝を設けるだけ
では半田用フラックスを補強金属板の外周側に全部を完
全に抜き出すのは困難で依然として半田付け面にフラッ
クスが残存することにより十分な接着強度を持ってセラ
ミック素体を接続固定することができない。また、補強
金属板に多数の透孔を散在させて設ける場合には半田用
フラックスを抜き出すことはできても、電圧の印加に伴
ってセラミック素体の内部に生ずる圧電現象による振動
エネルギーを効果的に抑え得る板面領域が多数の透孔で
分断されてしまうため、前者の場合も含めて雷インパル
ス耐電圧のフルウエーブ波の破壊電圧よりも極めて低い
電圧で機械的破壊が生ずることを免れ得ない。The problem to be solved by the invention However, it is difficult to completely draw out the solder flux completely to the outer peripheral side of the reinforcing metal plate only by providing the concave groove on the soldering surface of the reinforcing metal plate, and the flux still remains on the soldering surface. However, the ceramic element bodies cannot be connected and fixed with sufficient adhesive strength. Further, when a large number of through holes are provided in the reinforcing metal plate in an interspersed manner, the soldering flux can be extracted, but the vibration energy due to the piezoelectric phenomenon generated inside the ceramic body with the application of voltage is effective. Since the plate surface area that can be suppressed is divided by a large number of through holes, it is possible to avoid mechanical breakdown at a voltage extremely lower than the breakdown voltage of the full wave wave of the lightning impulse withstand voltage, including the former case. Absent.
茲において、本考案は半田用フラックスの影響を受けず
に補強金属板を確実に半田付けすることにより高いさい
断波破壊電圧が得られて機械的エネルギーで絶縁破壊を
確実に防止できるセラミックコンデンサを提供するとを
目的とする。In the present invention, the present invention provides a ceramic capacitor that can reliably prevent dielectric breakdown by mechanical energy by obtaining a high voltage breaking voltage by securely soldering a reinforcing metal plate without being affected by soldering flux. The purpose is to provide.
課題を解決するための手段 本考案に係るセラミックコンデンサにおいては、円板形
セラミック素体にAg等の焼付電極層を形成し、少なくと
も片面に中心孔を持つドーナツ板状の補強金属板を同心
円上に当接させて半田付け固着するものであり、その補
強金属板としては補強金属板の直径比で６〜26％程度の
中心孔を占有するものを組付けて構成されている。Means for Solving the Problems In a ceramic capacitor according to the present invention, a disc-shaped ceramic body is provided with a baked electrode layer of Ag or the like, and a doughnut-shaped reinforcing metal plate having a central hole on at least one side is concentrically formed. And is fixed by soldering, and as the reinforcing metal plate, a reinforcing metal plate occupying a center hole of about 6 to 26% in diameter ratio is assembled.
作用 このセラミックコンデンサでは補強金属板を半田付け固
定する際に半田用フラックスが外周側のみならず、中心
孔の口径側よりも確実に抜け出るから十分な機械的強度
を持って半田付け固定でき、また、補強金属板がドーナ
ツ板状でセラミック素体の内部に発生する機械的エネル
ギーを抑制するのに必要な有効面積を持つからセラミッ
ク素体を十分な力で抑え得ることによりさい断波破壊電
圧を著しく向上されて機械的エネルギーで絶縁破壊を確
実に防止できるようになる。Function In this ceramic capacitor, when fixing the reinforcing metal plate by soldering, the soldering flux surely escapes not only from the outer peripheral side but also from the diameter side of the center hole, so it can be fixed by soldering with sufficient mechanical strength. , The reinforcing metal plate is in the shape of a donut and has an effective area necessary to suppress the mechanical energy generated inside the ceramic element body, so that the ceramic element body can be suppressed with sufficient force to reduce the breaking voltage. It is remarkably improved so that dielectric breakdown can be surely prevented by mechanical energy.
実施例 以下、添付図面を参照して説明すれば、次の通りであ
る。Embodiments The following will be described with reference to the accompanying drawings.
このセラミックコンデンサは第1,2図で示すように円板
状のセラミック素体１を用い、その両端面に電極層2,3
をAg,Cu等のペーストで焼付形成すると共に、好ましい
実施例として電極層2,3の夫々に当接させて端子板を兼
ねた補強金属板4,5を同心円上に半田付け固着すること
により組立てられている。この補強金属板4,5には中心
孔6,7を持つドーナツ形に真鍮等で形成したものを用い
ることができ、また、それは電極層２または３の少なく
とも片側に当てがって半田付け固定するだけでも足り
る。この半田付け時には補強金属板4,5と相対する電極
層2,3の端面に半田付着するが、その半田を加熱で溶融
するに伴って補強金属板4,5がドーナツ形であるから半
田用フラックスが補強金属板4,5の外周縁乃至は中心孔
６の口径側に確実に抜け出て補強金属板4,5と電極層2,3
との相対個所に残留することがない。従って、補強金属
板4,5は半田フラックスの影響を受けずに半田層8,9で十
分な機械的強度を持って固着できるようになる。This ceramic capacitor uses a disk-shaped ceramic body 1 as shown in Figs. 1 and 2, and has electrode layers 2, 3 on both end faces thereof.
By baking and forming a paste such as Ag, Cu, and the like, by abutting against each of the electrode layers 2 and 3 as a preferred embodiment, the reinforcing metal plates 4,5 also serving as terminal plates are fixed by soldering on concentric circles. It is assembled. The reinforcing metal plates 4,5 can be made of brass or the like in a donut shape having center holes 6 and 7, and are applied to at least one side of the electrode layer 2 or 3 and fixed by soldering. Just doing is enough. At the time of this soldering, the solder is attached to the end faces of the electrode layers 2 and 3 facing the reinforcing metal plates 4,5, but since the reinforcing metal plates 4,5 are doughnut-shaped as the solder is melted by heating, it is used for soldering. The flux surely escapes to the outer peripheral edge of the reinforcing metal plates 4,5 or to the diameter side of the center hole 6, and the reinforcing metal plates 4,5 and the electrode layers 2, 3
It does not remain in a location relative to. Therefore, the reinforcing metal plates 4 and 5 can be fixed to the solder layers 8 and 9 with sufficient mechanical strength without being affected by the solder flux.
このように構成するセラミックコンデンサでは補強金属
板4,5が半田層8,9で十分な機械的強度を持って電極層2,
3に固着されているのに加えて、補強金属板4,5がドーナ
ツ板状に形成されているから板面全体が一つになってセ
ラミック素体１を十分に抑えられるようになる。従っ
て、電圧の印加に伴ってセラミック素体１の内部に機械
的エネルギーが発生しても、その機械的エネルギーによ
る応力を確実に抑止することができるから高いさい断波
破壊電圧を得て機械的エネルギーで絶縁破壊を引き起こ
さず、特に遮断器等の高電圧機器用として必要とされる
雷インパルス耐電圧及びさい断波耐電圧特性の優れたも
のに構成することができる。In the ceramic capacitor configured in this way, the reinforcing metal plates 4,5 have the solder layers 8 and 9 with sufficient mechanical strength to form the electrode layers 2 and
In addition to being fixed to 3, the reinforcing metal plates 4 and 5 are formed in a donut plate shape, so that the whole plate surface becomes one and the ceramic body 1 can be sufficiently suppressed. Therefore, even if mechanical energy is generated inside the ceramic body 1 due to the application of a voltage, the stress due to the mechanical energy can be surely suppressed, so that a high breaking voltage for breaking is obtained and mechanical It can be configured to have excellent lightning impulse withstand voltage and dicing wave withstand voltage characteristics which are required for high voltage equipment such as circuit breakers without causing dielectric breakdown by energy.
因みに、次の（Ｉ）〜（II）で示す誘導体磁器材料でセ
ラミック素体をφ39t10mmに形成し、 I:BaTiO3−SrTiO3−Bi2O3・3TiO2系 II:SrTiO3−PbTiO3−CaTiO3−Bi2O3・3TiO2系 また、真鍮でφ35t13mmに形成した補強金属板を用いて
構成したセラミックコンデンサについて、中心孔の直径
を違えたもの毎にさい断波1.2×３μsecでインパルス破
壊電圧を測定したところ、第３図で示す通りであった。By the way, the ceramic body was formed to φ 39 t 10 mm with the derivative porcelain materials shown in (I) to (II) below, and I: BaTiO 3 —SrTiO 3 —Bi 2 O 3 · 3TiO 2 system II: SrTiO 3 —PbTiO 3− CaTiO 3 −Bi 2 O 3 / 3TiO 2 series Ceramic capacitors composed of a reinforced metal plate made of brass with a diameter of 35 t 13 mm are cut by 1.2 × When the impulse breakdown voltage was measured for 3 μsec, it was as shown in FIG.
この第３図で明らかな如く、本考案に係るセラミックコ
ンデンサでは高いインパルス破壊電圧を得られ、そのな
かでも中心孔の直径が補強金属板の直径比で６〜26％程
度を占有するものが最も特性的に優れることが判明し
た。As is clear from FIG. 3, in the ceramic capacitor according to the present invention, a high impulse breakdown voltage can be obtained, and among them, the one in which the diameter of the central hole occupies 6 to 26% of the diameter ratio of the reinforcing metal plate is the most. It turned out to be excellent in characteristics.
考案の効果 以上の如く、本考案に係るセラミックコンデンサによれ
ば、十分な機械的強度を持ってドーナツ板状の補強金属
板をセラミック素体に半田付け固定することによりセラ
ミック素体を堅牢に保持するから、さい断波破壊電圧を
高くできると共にセラミック素体の機械的エネルギーで
絶縁破壊を確実に防止できるようになる。Effect of the Invention As described above, according to the ceramic capacitor of the present invention, the doughnut-shaped reinforcing metal plate is soldered and fixed to the ceramic body with sufficient mechanical strength to firmly hold the ceramic body. Therefore, it is possible to increase the breaking voltage at the time of breaking and to reliably prevent the dielectric breakdown by the mechanical energy of the ceramic body.
第１図は本考案に係るセラミックコンデンサの側断面
図、第２図は同コンデンサの平面図、第３図は本考案に
係るコンデンサで補強金属板の中心孔を違えたものから
得られたインパルス破壊電圧の平均的な数値を示すグラ
フである。 1:セラミック素体、2,3:電極層、4,5:補強金属板、6,7:
中心孔。FIG. 1 is a side sectional view of a ceramic capacitor according to the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is an impulse obtained from a capacitor according to the present invention in which a center hole of a reinforcing metal plate is different. It is a graph which shows the average value of breakdown voltage. 1: Ceramic body, 2, 3: Electrode layer, 4, 5: Reinforcing metal plate, 6, 7:
Central hole.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 佐藤 司 東京都中央区日本橋１丁目13番１号 ティ ーディーケイ株式会社内 (72)考案者 渡辺 義春 東京都中央区日本橋１丁目13番１号 ティ ーディーケイ株式会社内 (72)考案者 佐々木 則夫 東京都中央区日本橋１丁目13番１号 ティ ーディーケイ株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsukasa Sato 1-13-1 Nihonbashi, Chuo-ku, Tokyo TDC Corporation (72) Inventor Yoshiharu Watanabe 1-13-1 Nihonbashi, Chuo-ku, Tokyo TDC Co., Ltd. (72) Inventor Norio Sasaki 1-13-1 Nihonbashi, Chuo-ku, Tokyo TDC Inc.
Claims (1)
極層（2,3）を形成し、少なくとも片面に中心孔（6,7）
を持つドーナツ板状の補強金属板（4,5）を同心円上に
当接させて半田付け固着するセラミックコンデンサにお
いて、上記中心孔（6,7）が補強金属板（4,5）の直径比
で６〜26％程度を占有することを特徴とするセラミック
コンデンサ。1. A disk-shaped ceramic body (1) having electrode layers (2, 3) formed on both end surfaces thereof, and a central hole (6, 7) formed on at least one surface.
In a ceramic capacitor in which a toroidal plate-shaped reinforcing metal plate (4,5) having an abutment is concentrically abutted and fixed by soldering, the center hole (6, 7) has a diameter ratio of the reinforcing metal plate (4,5). A ceramic capacitor characterized by occupying about 6 to 26%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14363788U JPH0635460Y2 (en) | 1988-11-02 | 1988-11-02 | Ceramic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14363788U JPH0635460Y2 (en) | 1988-11-02 | 1988-11-02 | Ceramic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0263523U JPH0263523U (en) | 1990-05-11 |
| JPH0635460Y2 true JPH0635460Y2 (en) | 1994-09-14 |
Family
ID=31410636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14363788U Expired - Lifetime JPH0635460Y2 (en) | 1988-11-02 | 1988-11-02 | Ceramic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0635460Y2 (en) |
-
1988
- 1988-11-02 JP JP14363788U patent/JPH0635460Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0263523U (en) | 1990-05-11 |
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