JPH076865A - Ceramic heater element - Google Patents
Ceramic heater elementInfo
- Publication number
- JPH076865A JPH076865A JP14337993A JP14337993A JPH076865A JP H076865 A JPH076865 A JP H076865A JP 14337993 A JP14337993 A JP 14337993A JP 14337993 A JP14337993 A JP 14337993A JP H076865 A JPH076865 A JP H076865A
- Authority
- JP
- Japan
- Prior art keywords
- ceramic body
- tip
- heating element
- insulating
- heater element
- 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.)
- Granted
Links
Landscapes
- Resistance Heating (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、セラミック発熱体に関
する。本発明のセラミック発熱体は、例えばディーゼル
エンジン用のセラミックグロープラグ等に用いられる。FIELD OF THE INVENTION This invention relates to ceramic heating elements. The ceramic heating element of the present invention is used, for example, in a ceramic glow plug for a diesel engine.
【０００２】[0002]
【従来の技術】従来より、発熱部として高融点金属のフ
ィラメントを用いたセラミック発熱体、及び、先端部に
導電性セラミックを露出して配置させたセラミック発熱
体が種々提案されている。また、特開平１ー３１７１７
０号公報は、オールセラミック構造のセラミック発熱体
を開示している。すなわち、このセラミック発熱体は、
円形断面を有する絶縁性セラミック体の内部に断面Ｕ字
形の導電性セラミック体のヒータが埋設されており、更
に、絶縁性セラミック体に埋設されたタングステンの電
極の先端が導電性セラミック体の両端に接続されてい
る。2. Description of the Related Art Conventionally, various ceramic heating elements using a filament of a high melting point metal as a heating element, and various ceramic heating elements having a conductive ceramic exposed at the tip have been proposed. In addition, JP-A-1-31717
No. 0 discloses a ceramic heating element having an all-ceramic structure. That is, this ceramic heating element
A heater made of a conductive ceramic body having a U-shaped cross section is embedded inside an insulating ceramic body having a circular cross section, and the tips of tungsten electrodes embedded in the insulating ceramic body are provided at both ends of the conductive ceramic body. It is connected.
【０００３】例えばセラミックグロープラグに適用され
る上記セラミック発熱体の導電性セラミック体は、原料
を均一に混合し、成形の後、焼成されるため、導電性セ
ラミック体は通電経路の全長にわたって、ほぼ均一な比
抵抗を有している。また、導電性セラミック体の断面積
は一定に形成されているので、導電性セラミック体はそ
の全長にわたってほぼ均一に発熱する。For example, the conductive ceramic body of the above-mentioned ceramic heating element applied to a ceramic glow plug is uniformly mixed with raw materials, molded, and then fired, so that the conductive ceramic body is substantially distributed over the entire length of the current-carrying path. It has a uniform resistivity. Moreover, since the cross-sectional area of the conductive ceramic body is formed to be constant, the conductive ceramic body generates heat almost uniformly over its entire length.
【０００４】[0004]
【発明が解決しようとする課題】上記したように従来の
導電性セラミック体はその全長にわたってほぼ均一に発
熱するが、絶縁性セラミック体の中間部に埋設された導
電性セラミック体の部分（以下、先端側ヒータ部と呼
ぶ）は、絶縁性セラミック体の先端部に埋設された導電
性セラミック体の部分（以下、中間側ヒータ部と呼ぶ）
に比較して放熱しやすく、そのために、中間側ヒータ部
は先端側ヒータ部に比較して低温となる。As described above, the conventional conductive ceramic body generates heat almost uniformly over its entire length. However, a portion of the conductive ceramic body embedded in the intermediate portion of the insulating ceramic body (hereinafter, referred to as The tip side heater portion) is a portion of the conductive ceramic body embedded in the tip portion of the insulating ceramic body (hereinafter referred to as the middle side heater portion).
It is easier to radiate heat as compared with the above, and therefore, the intermediate side heater section has a lower temperature than the tip side heater section.
【０００５】すなわち、上記中間側ヒータ部は、電極を
有する絶縁性セラミック体の根部すなわち先端部と反対
側へ固体伝熱により速やかに放冷し、低温となる。それ
に比較し、上記先端側ヒータ部はガス（空気）に接する
ために境界層が形成されたりして大きな熱抵抗が形成さ
れ、そのために先端側ヒータ部は中間側ヒータ部に比べ
て高温となることがわかった（図４の点線参照）。In other words, the intermediate heater section quickly cools to a side opposite to the root portion, that is, the tip portion of the insulating ceramic body having the electrodes by solid heat transfer, and becomes a low temperature. On the other hand, the tip side heater part has a large thermal resistance due to the boundary layer formed because it is in contact with gas (air), and therefore the tip side heater part has a higher temperature than the middle side heater part. It was found (see the dotted line in FIG. 4).
【０００６】この温度差は、本発明者らの実験結果、通
電初期に最も大きく、時間が経過するとともに縮小す
る。しかし、グロープラグでは、通電後できるたけ短時
間にエンジン始動可能温度まで昇温する必要があり、上
記のような温度傾斜を持つセラミック発熱体では、燃焼
室内にて着火スポットが先端部に限定されて狭いために
着火性が低下し、エンジン始動性が低下する場合があ
る。As a result of experiments conducted by the inventors of the present invention, this temperature difference is the largest at the initial stage of energization, and decreases with the passage of time. However, in the glow plug, it is necessary to raise the temperature to the engine startable temperature as soon as possible after energization, and in the ceramic heating element with the temperature gradient as described above, the ignition spot is limited to the tip of the combustion chamber. Because of its narrow size, ignitability may be reduced, and engine startability may be reduced.
【０００７】本発明は上記問題点に鑑みなされたもので
あり、発熱時の温度分布の平坦化を実現したセラミック
発熱体を提供することを、その目的としている。The present invention has been made in view of the above problems, and an object of the present invention is to provide a ceramic heating element capable of flattening the temperature distribution during heat generation.
【０００８】[0008]
【課題を解決するための手段】本発明のセラミック発熱
体は、先端側から順に先端部、中間部、根部に区画され
る棒状の絶縁性セラミック体と、前記絶縁性セラミック
体の前記先端部及び前記中間部に埋設されて発熱体とし
て機能する導電性セラミック体と、前記導電性セラミッ
ク体の根部に埋設されて前記導電性セラミック体の両端
に接続される一対の電極とを備えるセラミック発熱体に
おいて、前記導電性セラミック体の内、前記絶縁性セラ
ミック体の前記先端部に埋設された部分は、前記絶縁性
セラミック体の前記中間部に埋設された部分よりも大き
な断面積を有することを特徴としている。The ceramic heating element of the present invention comprises a rod-shaped insulating ceramic body partitioned into a tip portion, an intermediate portion and a root portion in order from the tip side, and the tip portion of the insulating ceramic body and A ceramic heating element including a conductive ceramic body embedded in the intermediate portion and functioning as a heating element, and a pair of electrodes embedded in a root portion of the conductive ceramic body and connected to both ends of the conductive ceramic body. A portion of the conductive ceramic body embedded in the tip end portion of the insulating ceramic body has a larger cross-sectional area than a portion embedded in the intermediate portion of the insulating ceramic body. There is.
【０００９】[0009]
【作用及び発明の効果】本発明では、セラミック発熱体
の電熱線として機能する導電性セラミック体の先端部に
位置する先端側ヒータ部が、前記先端ヒータ部に隣接す
る中間側ヒータ部よりも大きな断面積を有し、低電気抵
抗を有するので、通電時に中間側ヒータ部の発熱量が先
端側ヒータ部のそれよりも増大し、そのために中間側ヒ
ータ部の放熱量が先端側ヒータ部のそれより多いにもか
かわらず、絶縁性セラミック体の表面各部の温度分布が
平坦となる。したがって、例えばこのセラミック発熱体
をグロープラグなどに用いた場合、絶縁性セラミック体
の表面各部の温度が均一化するために着火スポット（着
火可能領域）が広くなり、安定した着火を図ることがで
きる。According to the present invention, the tip side heater portion located at the tip portion of the conductive ceramic body functioning as a heating wire of the ceramic heating element is larger than the intermediate heater portion adjacent to the tip heater portion. Since it has a cross-sectional area and low electric resistance, the amount of heat generated by the middle side heater section is larger than that of the front side heater section when energized. Despite the larger number, the temperature distribution on each surface of the insulating ceramic body becomes flat. Therefore, for example, when this ceramic heating element is used for a glow plug or the like, the temperature of each part of the surface of the insulating ceramic body becomes uniform, so that the ignition spot (ignitionable region) becomes wide, and stable ignition can be achieved. .
【００１０】[0010]
【実施例】本発明の一実施例を具体的実施例により説明
する。図１は本発明のセラミック発熱体１の一構成例を
示す断面図である。このセラミック発熱体１は、略円形
断面を有する棒状の絶縁性セラミック体３の先端内部
に、略Ｕ字形状をなす導電性セラミック体２と、導電部
材であるタングステンよりなる一対の電極４、５が埋設
されている。EXAMPLES An example of the present invention will be described with reference to specific examples. FIG. 1 is a cross-sectional view showing one structural example of the ceramic heating element 1 of the present invention. In this ceramic heating element 1, a substantially U-shaped conductive ceramic body 2 and a pair of electrodes 4 and 5 made of tungsten, which is a conductive member, are provided inside a tip end of a rod-shaped insulating ceramic body 3 having a substantially circular cross section. Is buried.
【００１１】絶縁性セラミック体３は、電気絶縁性の耐
熱セラミックスを素材としており、先端部３１と、根部
３３と、先端部３１と根部３３との間の中間部３２とに
区画される。導電性セラミック体２は、所定の抵抗率を
有する耐熱セラミックスを素材としており、絶縁性セラ
ミック体３の中間部３２に埋設された両端部（中間側ヒ
ータ部）２ｂと、絶縁性セラミック体３の先端部３１に
埋設されたＵ字部（先端側ヒータ部）２ａとからなる。
特に本実施例では、Ｕ字部２ａは両端部２ｂよりも大断
面積に形成されている。The insulating ceramic body 3 is made of electrically insulating heat-resistant ceramics, and is divided into a tip portion 31, a root portion 33, and an intermediate portion 32 between the tip portion 31 and the root portion 33. The conductive ceramic body 2 is made of a heat-resistant ceramic having a predetermined resistivity, and has both end portions (intermediate side heater portions) 2b embedded in the intermediate portion 32 of the insulating ceramic body 3 and the insulating ceramic body 3. The U-shaped portion (tip-side heater portion) 2a is embedded in the tip portion 31.
Particularly in this embodiment, the U-shaped portion 2a is formed to have a larger cross-sectional area than both end portions 2b.
【００１２】電極４、５は、絶縁性セラミック体３の根
部３３に埋設されており、それらの内端は導電性セラミ
ック体２の両端部２ｂに個別に接続されている。電極
４、５の外端４ａ、５ａは図示しないリード線等と接続
するよう絶縁性セラミック体３の側面に一部表面を露出
するよう屈曲してある。次に、ディーゼルエンジン用の
セラミックグロープラグに本実施例のセラミック発熱体
１を用いた場合を例にとって、本実施例の効果につい
て、試験結果をもとに詳細に説明する。The electrodes 4 and 5 are embedded in the root portion 33 of the insulating ceramic body 3, and their inner ends are individually connected to both end portions 2b of the conductive ceramic body 2. The outer ends 4a, 5a of the electrodes 4, 5 are bent to expose a part of the surface on the side surface of the insulating ceramic body 3 so as to be connected to a lead wire or the like not shown. Next, the effect of this embodiment will be described in detail based on the test results, taking as an example the case where the ceramic heating element 1 of this embodiment is used in a ceramic glow plug for a diesel engine.
【００１３】まず、図２にこのグロープラグの一実施例
を示す。電極４の一端４ａが露出する絶縁性セラミック
体３の根部３３の中央部にはニッケルメッキが施されて
おり、このニッケルメッキ層（図示せず）を介して、金
属パイプ６が絶縁性セラミック体３の根部３３の中央部
に嵌着され、ろう付け固定されている。金属パイプ６の
外周には、金属筒よりなるハウジング１０の一端部が嵌
着され、ろう付けによって接合されている。ハウジング
１０の径大な主部の外周には図示しないエンジンヘッド
への取り付けネジ１０ａが形成されている。これによ
り、絶縁性セラミック体３の根部３３の側面に導出され
た電極４の一端４ａは金属パイプ６と電気的に接続さ
れ、金属パイプ６は金属ハウジング１０を介して図示し
ない内燃機関のブロックへ接地されている。First, FIG. 2 shows an embodiment of the glow plug. The center portion of the root portion 33 of the insulating ceramic body 3 where one end 4a of the electrode 4 is exposed is plated with nickel, and the metal pipe 6 is connected to the insulating ceramic body 3 through this nickel plating layer (not shown). 3 is fitted in the central portion of the root portion 33 and fixed by brazing. One end of a housing 10 made of a metal tube is fitted around the outer circumference of the metal pipe 6 and joined by brazing. A mounting screw 10a (not shown) for mounting on an engine head is formed on the outer periphery of the large-diameter main portion of the housing 10. As a result, one end 4a of the electrode 4 led to the side surface of the root portion 33 of the insulating ceramic body 3 is electrically connected to the metal pipe 6, and the metal pipe 6 is connected to the block of the internal combustion engine (not shown) via the metal housing 10. It is grounded.
【００１４】一方、ハウジング１０内の孔部収容される
とともに電極５の一端５ａが露出する絶縁性セラミック
体３の根部３３の端部にもニッケルメッキが施されてお
り、このニッケルメッキ層（図示せず）を介して、金属
缶７が絶縁性セラミック体３の根部３３の端部に嵌着さ
れ、ろう付け固定されている。これにより、絶縁性セラ
ミック体３の根部３３の端部に導出された電極５の一端
５ａは金属キャップ７と電気的に接続され、金属キャッ
プ７はハウジング１０の孔部内にてリード線８を通じて
良導電金属からなる中軸９の内端に接続されている。ハ
ウジング１０の孔部の図中上端開口は絶縁セラミックス
からなるスペーサ１１、キャップ１２により封栓されて
おり、スペーサ１１、キャップ１２は中軸９をハウジン
グ１０から絶縁しつつ保持している。スペーサ１１、キ
ャップ１２から突出する中軸９の外端部は図示しない電
源に接続されている。On the other hand, the end portion of the root portion 33 of the insulating ceramic body 3 which receives the hole 5 in the housing 10 and exposes one end 5a of the electrode 5 is also nickel-plated. The metal can 7 is fitted to the end portion of the root portion 33 of the insulating ceramic body 3 and fixed by brazing via a not shown). As a result, the one end 5a of the electrode 5 led out to the end of the root portion 33 of the insulating ceramic body 3 is electrically connected to the metal cap 7, and the metal cap 7 passes through the lead wire 8 in the hole of the housing 10. It is connected to the inner end of the center pole 9 made of a conductive metal. The upper end opening of the hole of the housing 10 in the figure is sealed by a spacer 11 and a cap 12 made of insulating ceramics, and the spacer 11 and the cap 12 hold the center shaft 9 while insulating it from the housing 10. The outer end portion of the inner shaft 9 protruding from the spacer 11 and the cap 12 is connected to a power source (not shown).
【００１５】上記したセラミック発熱体１の性能を実証
するために、以下の試験品を作製した。この試験品の絶
縁性セラミック体３は主成分がＳｉ3 Ｎ4 からなり、直
径３．５ｍｍ、全長５０ｍｍとなっている。導電性セラ
ミック体２は主成分ＭｏＳｉ 2 からなり、そのＵ字部２
ａの断面積は２．８ｍｍ2 、両端部２ｂの断面積は１．
８ｍｍ2 となっている。それぞれ電極４、５に接続され
る導電性セラミック体２の全長は約１５ｍｍ、抵抗値は
０．７Ωであり、電圧１２Ｖを印加した時に温度ピーク
が１２００℃になるような設計をした。Demonstrate the performance of the ceramic heating element 1 described above
In order to do so, the following test products were produced. Absence of this test product
The edging ceramic body 3 is mainly composed of Si3NFourConsists of
The diameter is 3.5 mm and the total length is 50 mm. Conductive ceramic
Mick body 2 is the main component MoSi 2Consists of the U-shaped part 2
The cross-sectional area of a is 2.8 mm2, The cross-sectional area of both ends 2b is 1.
8 mm2Has become. Connected to electrodes 4 and 5, respectively
The conductive ceramic body 2 has a total length of about 15 mm and a resistance value of
0.7Ω, temperature peak when a voltage of 12V is applied
Was designed to be 1200 ° C.
【００１６】次に比較例として、図３に示す形状のセラ
ミック発熱体１’を作製した。このセラミック発熱体
１’は、導電性セラミック体２’が図１の導電性セラミ
ック体２と同一形状を有するものの、各部断面積が等し
くなっている点が異なっている。ただし、両品の通電電
力を等しくするために、導電性セラミック体２’の抵抗
値は０．７Ωとなるように断面積を設計した。Next, as a comparative example, a ceramic heating element 1'having the shape shown in FIG. 3 was produced. The ceramic heating element 1'is different in that the conductive ceramic body 2'has the same shape as the conductive ceramic body 2 of FIG. However, the cross-sectional area was designed such that the resistance value of the conductive ceramic body 2 ′ was 0.7Ω in order to equalize the electric power supplied to both products.
【００１７】なお、導電性セラミック体２、２’の表面
とその上に被っている絶縁性セラミック体３の表面との
間の距離（被覆厚さ）は約０．４ｍｍとした。図４に、
通電４秒後の温度分布を示し、図５に通電８秒後の温度
分布を示す。これら温度は、絶縁性セラミック体３の表
面にて測定した。図４、図５から明らかなように、従来
品、本発明品とも先端から順次温度が上昇し、最高温度
部を経て、電極方向に温度が低下してゆくことが分か
る。しかし、試験品は、特にその両端部２ｂの表面部位
において、従来品より高温となっており、試験品のＵ字
部２ａ及び両端部２ｂの間の温度傾斜は従来品に比較し
て格段に平坦化されている。The distance (coating thickness) between the surfaces of the conductive ceramic bodies 2 and 2'and the surface of the insulating ceramic body 3 covering them was about 0.4 mm. In Figure 4,
The temperature distribution after 4 seconds of energization is shown, and FIG. 5 shows the temperature distribution after 8 seconds of energization. These temperatures were measured on the surface of the insulating ceramic body 3. As is clear from FIGS. 4 and 5, it can be seen that the temperature of the conventional product and the product of the present invention gradually increase from the tip, and the temperature decreases in the electrode direction after passing through the maximum temperature portion. However, the temperature of the test product is higher than that of the conventional product, especially at the surface portions of both ends 2b thereof, and the temperature gradient between the U-shaped portion 2a and both ends 2b of the test product is remarkably higher than that of the conventional product. It is flattened.
【００１８】すなわち、先端近傍の最高温度部と電極
４，５近傍の最低温度部の温度差を見ると、試験品は従
来品の半分以下となっており、各部温度の平均値も格段
に上昇していることがわかる。なお、図１の実施例にお
いて、両端部２ｂの断面積の削減率は、両端部２ｂの各
部の表面温度がＵ字部２ａの表面温度にほぼ等しくなる
ように決定することが好ましい。 （変形態様１）図６に示すように、導電性セラミック体
２と電極４、５との結合をより確実にするため、結合部
２ｃの断面積を大きくしたものでもよい。 （変形態様２）図７に示すように、導電性セラミック体
２の両端部２ｂの片側のみ、狭小断面積としてもよい。 （変形態様３）更に、図４、図５の実線からわかるよう
に、先端部３１の最下端部（図１参照）は先端部３１の
上部（図１参照）より温度が多少低下している。これを
防止するために、Ｕ字部２ａの最下端部の断面積を狭小
化して、更に一層の温度分布平坦化を図ることもでき
る。That is, looking at the temperature difference between the highest temperature part near the tip and the lowest temperature part near the electrodes 4 and 5, the test product is less than half that of the conventional product, and the average value of the temperature of each part also rises dramatically. You can see that In the embodiment of FIG. 1, the reduction rate of the cross-sectional area of both ends 2b is preferably determined so that the surface temperature of each part of both ends 2b is substantially equal to the surface temperature of the U-shaped part 2a. (Modification 1) As shown in FIG. 6, in order to secure the connection between the conductive ceramic body 2 and the electrodes 4 and 5, the cross-sectional area of the connecting portion 2c may be increased. (Modification 2) As shown in FIG. 7, only one side of both ends 2b of the conductive ceramic body 2 may have a narrow cross-sectional area. (Modification 3) Further, as can be seen from the solid lines in FIGS. 4 and 5, the temperature at the lowermost end portion (see FIG. 1) of the tip portion 31 is slightly lower than that at the upper portion (see FIG. 1) of the tip portion 31. . In order to prevent this, the cross-sectional area of the lowermost end of the U-shaped portion 2a can be narrowed to further flatten the temperature distribution.
【図１】本実施例のセラミック発熱体を示す断面図であ
る。FIG. 1 is a sectional view showing a ceramic heating element of the present embodiment.
【図２】本実施例のセラミック発熱体を備えたセラミッ
クグロープラグを示す断面図である。FIG. 2 is a cross-sectional view showing a ceramic glow plug including a ceramic heating element of this embodiment.
【図３】従来のセラミック発熱体を示す断面図である。FIG. 3 is a sectional view showing a conventional ceramic heating element.
【図４】図１のセラミック発熱体の温度分布を示すグラ
フである。FIG. 4 is a graph showing a temperature distribution of the ceramic heating element of FIG.
【図５】図１のセラミック発熱体の温度分布を示すグラ
フである。5 is a graph showing a temperature distribution of the ceramic heating element of FIG.
【図６】変形態様を示す断面図である。FIG. 6 is a cross-sectional view showing a modified mode.
【図７】変形態様を示す断面図である。FIG. 7 is a cross-sectional view showing a modified mode.
【符号の説明】 １ セラミック発熱体 ２ 導電性セラミック体 ３ 絶縁性セラミック体 ４ 電極 ５ 電極[Explanation of symbols] 1 ceramic heating element 2 conductive ceramic body 3 insulating ceramic body 4 electrode 5 electrode
Claims (1)
区画される棒状の絶縁性セラミック体と、前記絶縁性セ
ラミック体の前記先端部及び前記中間部に埋設されて発
熱体として機能する導電性セラミック体と、前記導電性
セラミック体の根部に埋設されて前記導電性セラミック
体の両端に接続される一対の電極とを備えるセラミック
発熱体において、 前記導電性セラミック体の内、前記絶縁性セラミック体
の前記先端部に埋設された部分は、前記絶縁性セラミッ
ク体の前記中間部に埋設された部分よりも大きな断面積
を有することを特徴とするセラミック発熱体。1. A rod-shaped insulating ceramic body partitioned into a tip portion, an intermediate portion, and a root portion in order from the tip side, and embedded in the tip portion and the intermediate portion of the insulating ceramic body to function as a heating element. A ceramic heating element comprising a conductive ceramic body and a pair of electrodes embedded in a root portion of the conductive ceramic body and connected to both ends of the conductive ceramic body, wherein the insulating property of the conductive ceramic body is The ceramic heating element, wherein the portion of the ceramic body embedded in the tip portion has a larger cross-sectional area than the portion of the insulating ceramic body embedded in the intermediate portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14337993A JP3351573B2 (en) | 1993-06-15 | 1993-06-15 | Ceramic heating element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14337993A JP3351573B2 (en) | 1993-06-15 | 1993-06-15 | Ceramic heating element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH076865A true JPH076865A (en) | 1995-01-10 |
| JP3351573B2 JP3351573B2 (en) | 2002-11-25 |
Family
ID=15337413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14337993A Expired - Fee Related JP3351573B2 (en) | 1993-06-15 | 1993-06-15 | Ceramic heating element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3351573B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6204481B1 (en) * | 1998-09-11 | 2001-03-20 | Ngk Spark Plug Co., Ltd. | Glow plug with ceramic heating element having electrode attached thereto |
| CN1067144C (en) * | 1997-03-31 | 2001-06-13 | 日本特殊陶业株式会社 | Ceramic heater |
| US6335516B1 (en) * | 1999-07-02 | 2002-01-01 | Beru Ag | Ceramic heating rod and glow plug containing the latter and a process for their manufacture |
| JP2007141740A (en) * | 2005-11-21 | 2007-06-07 | Ngk Spark Plug Co Ltd | Manufacturing method of ceramic heater, and manufacturing method of glow plug |
| JP2008089233A (en) * | 2006-10-02 | 2008-04-17 | Denso Corp | Glow plug |
| JP2010108606A (en) * | 2008-10-28 | 2010-05-13 | Kyocera Corp | Ceramic heater |
| EP2496051A1 (en) * | 2009-10-27 | 2012-09-05 | Kyocera Corporation | Ceramic heater |
| US9196109B2 (en) | 2011-09-15 | 2015-11-24 | Oki Electric Industry Co., Ltd. | Automatic transaction apparatus that guides conveyance of a paper medium |
| EP3200558A1 (en) * | 2016-01-27 | 2017-08-02 | JX Nippon Mining & Metals Corporation | Mosi2 heating element and method of producing said heating element |
-
1993
- 1993-06-15 JP JP14337993A patent/JP3351573B2/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067144C (en) * | 1997-03-31 | 2001-06-13 | 日本特殊陶业株式会社 | Ceramic heater |
| US6204481B1 (en) * | 1998-09-11 | 2001-03-20 | Ngk Spark Plug Co., Ltd. | Glow plug with ceramic heating element having electrode attached thereto |
| US6335516B1 (en) * | 1999-07-02 | 2002-01-01 | Beru Ag | Ceramic heating rod and glow plug containing the latter and a process for their manufacture |
| JP2007141740A (en) * | 2005-11-21 | 2007-06-07 | Ngk Spark Plug Co Ltd | Manufacturing method of ceramic heater, and manufacturing method of glow plug |
| JP2008089233A (en) * | 2006-10-02 | 2008-04-17 | Denso Corp | Glow plug |
| EP2343951A1 (en) * | 2008-10-28 | 2011-07-13 | Kyocera Corporation | Ceramic heater |
| JP2010108606A (en) * | 2008-10-28 | 2010-05-13 | Kyocera Corp | Ceramic heater |
| EP2343951A4 (en) * | 2008-10-28 | 2014-08-13 | Kyocera Corp | Ceramic heater |
| US9288845B2 (en) | 2008-10-28 | 2016-03-15 | Kyocera Corporation | Ceramic heater |
| EP2496051A1 (en) * | 2009-10-27 | 2012-09-05 | Kyocera Corporation | Ceramic heater |
| EP2496051A4 (en) * | 2009-10-27 | 2015-02-18 | Kyocera Corp | Ceramic heater |
| US9196109B2 (en) | 2011-09-15 | 2015-11-24 | Oki Electric Industry Co., Ltd. | Automatic transaction apparatus that guides conveyance of a paper medium |
| EP3200558A1 (en) * | 2016-01-27 | 2017-08-02 | JX Nippon Mining & Metals Corporation | Mosi2 heating element and method of producing said heating element |
| JP2017134968A (en) * | 2016-01-27 | 2017-08-03 | Ｊｘ金属株式会社 | ELECTRICAL HEATING ELEMENT COMPOSED OF MoSi2 AND METHOD OF MANUFACTURING ELECTRICAL HEATING ELEMENT |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3351573B2 (en) | 2002-11-25 |
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