JPH0241876B2 - - Google Patents
Info
- Publication number
- JPH0241876B2 JPH0241876B2 JP20637382A JP20637382A JPH0241876B2 JP H0241876 B2 JPH0241876 B2 JP H0241876B2 JP 20637382 A JP20637382 A JP 20637382A JP 20637382 A JP20637382 A JP 20637382A JP H0241876 B2 JPH0241876 B2 JP H0241876B2
- Authority
- JP
- Japan
- Prior art keywords
- heating element
- ceramic
- housing
- insulating member
- insulating
- 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
Links
- 238000010438 heat treatment Methods 0.000 claims description 51
- 239000000919 ceramic Substances 0.000 claims description 31
- 239000002184 metal Substances 0.000 claims description 14
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 9
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- 229910016006 MoSi Inorganic materials 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Landscapes
- Resistance Heating (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はデイーゼルエンジン等に用いて好都合
なセラミツクヒータ装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a ceramic heater device conveniently used in diesel engines and the like.
従来この種のセラミツクヒータ装置は例えば特
開昭54−84144号公報に記載されたものがある。
これは第１０図に示すごとく、金属ハウジング１
の内側に円筒状のセラミツク発熱体２を、メタラ
イズ層により電気的に接続して固定し、かつ発熱
体２の内側の閉塞端に端子部材３を接触させ、端
子部材３と発熱体２との間の〓間、端子部材３と
ハウジング１との間の〓間に電気絶縁粉末４を充
填した構造である。
A conventional ceramic heater device of this type is described in, for example, Japanese Patent Application Laid-Open No. 54-84144.
As shown in Figure 10, this is the metal housing 1.
A cylindrical ceramic heating element 2 is electrically connected and fixed to the inside of the heating element 2 through a metallized layer, and a terminal member 3 is brought into contact with the closed end inside the heating element 2 to connect the terminal member 3 and the heating element 2. It has a structure in which electrical insulating powder 4 is filled between the terminal member 3 and the housing 1.
この従来例のものでは発熱体２の一部をハウジ
ング１の内側に固定するため、発熱体２の熱がそ
の固定部に直接に作用し、従つて固定部において
熱応力が発生し、発熱体２の固定不良を発生しや
すい。
In this conventional example, a part of the heating element 2 is fixed inside the housing 1, so the heat of the heating element 2 acts directly on the fixed part, so thermal stress is generated in the fixed part, and the heating element 2 is fixed inside the housing 1. 2. Fixing failure is likely to occur.
また、発熱体２の一部を電極部として使用する
ため、発熱体２の全体を発熱させることができ
ず、従つて発熱体２の抵抗温度係数が小さくなる
という不具合がある。本発明は、上記の不具合を
解消することを目的とするものである。 Moreover, since a part of the heating element 2 is used as an electrode part, the entire heating element 2 cannot be heated, and therefore, there is a problem that the temperature coefficient of resistance of the heating element 2 becomes small. The present invention aims to solve the above-mentioned problems.
本発明はかかる目的を達成するため、縦断面Ｕ
字状のセラミツク発熱体と、この発熱体のＵ字ス
リツト部ならびに２つの端部に一体的に接合した
電気絶縁セラミツク材料よりなる絶縁部材と、こ
の絶縁部材を内側に固定した金属ハウジングとを
備え、前記発熱体の一方の端部をリード線により
前記ハウジングに電気的に接続するとともに、前
記ハウジングに電気的に絶縁して設けた端子部材
にリード線により前記発熱体の他方の端部を電気
的に接続したという技術的手段を採用したもので
ある。
In order to achieve such an object, the present invention provides a longitudinal section U
It comprises a letter-shaped ceramic heating element, an insulating member made of an electrically insulating ceramic material integrally joined to the U-shaped slit portion and two ends of the heating element, and a metal housing with this insulating member fixed inside. , one end of the heating element is electrically connected to the housing via a lead wire, and the other end of the heating element is electrically connected via a lead wire to a terminal member provided electrically insulated on the housing. It adopted a technical means of connecting the two.
本発明の実施例を第１図乃至第３図をもとに詳
細に説明する。
Embodiments of the present invention will be described in detail with reference to FIGS. 1 to 3.
第１図において１は取付部、２は発熱部であ
る。取付部１は取付ネジ３ａを有した金属ハウジ
ング３、端子部材としての中心電極４を有する。
一方、発熱部２は、セラミツク発熱体５と、電気
絶縁セラミツク材料よりなる絶縁部材６と、これ
らセラミツク部材５，６の内部に埋設された２本
の金属リード線７０，８０から成る。 In FIG. 1, 1 is a mounting part and 2 is a heat generating part. The mounting portion 1 has a metal housing 3 having mounting screws 3a, and a center electrode 4 as a terminal member.
On the other hand, the heat generating section 2 is composed of a ceramic heat generating element 5, an insulating member 6 made of an electrically insulating ceramic material, and two metal lead wires 70, 80 embedded inside these ceramic members 5, 6.
セラミツク発熱体５は絶縁部材６の先端部にＵ
字状に形成されており、第２図に示す如くセラミ
ツク発熱体５の端部５ａ，５ｂの間に絶縁部材６
の端部６０がサンドイツチされた構造をなしてい
る。 The ceramic heating element 5 has a U at the tip of the insulating member 6.
The ceramic heating element 5 has an insulating member 6 between its ends 5a and 5b, as shown in FIG.
The end portion 60 of has a sandwiched structure.
金属リード線７０，８０の一端７１，８１は第
２図のごとくセラミツク発熱体５と電気的結合を
なしている。更に、リード線７０，８０の他端７
２，８２は絶縁部材６の外表面に露出している。
リード線７０の露出端７２はロウ付によりステン
レス製キヤツプ９に電気的に結合し、Ni線１０
で中心電極４に電気的に結合されている。一方、
リード線８０の露出端８２も同様にロウ付により
ステンレス製スリーブ１１に電気的に結合し、ス
リーブ１１はハウジング３に電気的にロウ付され
ている。 One ends 71, 81 of the metal lead wires 70, 80 are electrically connected to the ceramic heating element 5, as shown in FIG. Furthermore, the other end 7 of the lead wires 70, 80
2 and 82 are exposed on the outer surface of the insulating member 6.
The exposed end 72 of the lead wire 70 is electrically connected to the stainless steel cap 9 by brazing, and the Ni wire 10
and is electrically coupled to the center electrode 4. on the other hand,
The exposed end 82 of the lead wire 80 is similarly electrically coupled to the stainless steel sleeve 11 by brazing, and the sleeve 11 is electrically brazed to the housing 3.
なお、図中Ｘ，Ｙはメタライズ層（例えばAg
ロウ、Niロウ、Cuロウ）、１４は電気絶縁リン
グ、１５は耐熱ゴム製シールリング、１６は電気
絶縁ブツシユ、１７，１８は外部コネクタ取付用
のナツトを示している。 Note that X and Y in the figure are metalized layers (for example, Ag
14 is an electrically insulating ring, 15 is a seal ring made of heat-resistant rubber, 16 is an electrically insulating bushing, and 17 and 18 are nuts for attaching an external connector.
上記構成において、中心電極４を電源の＋側、
ハウジング３を電源の一側に接続することにより
電流はNi線１０、キヤツプ９、リード線７０、
セラミツク発熱体５、リード線８０、スリーブ１
１、ハウジング３へと流れ、発熱体５が発熱する
のである。 In the above configuration, the center electrode 4 is placed on the + side of the power supply,
By connecting the housing 3 to one side of the power supply, the current flows through the Ni wire 10, cap 9, lead wire 70,
Ceramic heating element 5, lead wire 80, sleeve 1
1. It flows to the housing 3, and the heating element 5 generates heat.
次に、上記セラミツク発熱部の製作方法につい
て述べる。第４図は第１図におけるセラミツク発
熱体５、絶縁部材６、金属リード線７０，８０の
取付構造を示す。 Next, a method of manufacturing the ceramic heating section will be described. FIG. 4 shows the mounting structure of the ceramic heating element 5, insulating member 6, and metal lead wires 70, 80 in FIG.
第４図おいて絶縁部材はSi3N4とAl2O3との混
合粉末成形体１２ａ，１２ｂ，１２ｃから成り、
セラミツク発熱体はMoSi2とSi3N4との混合粉末
成形体１３ａ，１３ｂ，１３ｃから成る。なお金
属リード線７０，８０はＷ線から成る。 In FIG. 4, the insulating member consists of mixed powder compacts 12a, 12b, 12c of Si 3 N 4 and Al 2 O 3 ,
The ceramic heating element consists of mixed powder compacts 13a, 13b, and 13c of MoSi 2 and Si 3 N 4 . Note that the metal lead wires 70 and 80 are made of W wire.
そして、第４図の矢印方向に加圧して焼結する
条件は例えばN2雰囲気、圧力300Kg／cm2、温度
1630℃×２時間である。 The conditions for pressurizing and sintering in the direction of the arrow in Figure 4 are, for example, N 2 atmosphere, pressure 300 kg/cm 2 , and temperature.
1630°C x 2 hours.
第５ａ図、第５ｂ図は第４図のものを焼結した
焼結体の平面図および側面図である。焼結体にお
いては、絶縁セラミツク成形体１２ａ，１２ｂ，
１２ｃは一体化して絶縁部材６を形成し、セラミ
ツク発熱材形成体１３ａ，１３ｂ，１３ｃは一体
化してＵ字状のセラミツク発熱体５を形成する。
絶縁部材６とセラミツク発熱体５との境界５６は
両者に含まれるSi3N4が互いに拡散して強固に接
合している。Ｗ線より成るリード線７０，８０は
セラミツク発熱体５のＵ字両端で電気的結合をな
し、他端７２，８２は絶縁部材６の内部から表面
に露出している。 Figures 5a and 5b are a plan view and a side view of a sintered body obtained by sintering the body shown in Figure 4. In the sintered body, insulating ceramic molded bodies 12a, 12b,
12c is integrated to form the insulating member 6, and the ceramic heating material forming bodies 13a, 13b, 13c are integrated to form the U-shaped ceramic heating element 5.
At the boundary 56 between the insulating member 6 and the ceramic heating element 5, Si 3 N 4 contained in both diffuses and is firmly bonded to each other. Lead wires 70 and 80 made of W wires are electrically connected at both U-shaped ends of the ceramic heating element 5, and the other ends 72 and 82 are exposed from the inside of the insulating member 6 to the surface.
ここで、絶縁部材６、セラミツク発熱体５、リ
ード線７０，８０は互いに熱膨張が合うよう配慮
されている。 Here, the insulating member 6, the ceramic heating element 5, and the lead wires 70, 80 are designed so that their thermal expansion matches each other.
以上のような製法および構造で得られたセラミ
ツクヒータ装置について、従来の第１０図のもの
と比較しつつ各種実験を行なつた。 Various experiments were conducted on the ceramic heater device obtained by the manufacturing method and structure described above, while comparing it with the conventional one shown in FIG.
第６図は１分通電（発熱体の表面温度1200℃）、
その後１分空冷というサイクルで断続通電耐久試
験を行なつた結果である。第６図からわかるよう
に従来のものは劣化傾向にあり、上記実施例のも
のは抵抗が劣化しなく安定している。この理由は
従来のものがセラミツク発熱体とハウジングとの
メタライズ部で剥離したためであり、金属ハウジ
ングとセラミツク発熱体とが直接接合されている
とセラミツク発熱体の熱が接合部に伝導しやす
く、この接合部に熱応力がかかつたことになる。 Figure 6 shows electricity applied for 1 minute (surface temperature of heating element 1200℃),
These are the results of an intermittent energization durability test with a 1-minute air-cooling cycle. As can be seen from FIG. 6, the conventional resistor tends to deteriorate, while the resistor of the above embodiment does not deteriorate in resistance and is stable. The reason for this is that in the conventional case, the ceramic heating element and the housing peeled off at the metallized part, and when the metal housing and the ceramic heating element are directly joined, the heat of the ceramic heating element is easily conducted to the joint, and this occurs. This means that thermal stress is applied to the joint.
第７図は従来と上記実施例において、発熱部と
ハウジング接合部との温度を測定したものであ
る。従来は本発明実施例に比べて接合部の温度が
上昇していることがわかる。 FIG. 7 shows the measured temperatures of the heat generating part and the housing joint part in the conventional case and the above-mentioned embodiment. It can be seen that in the conventional case, the temperature of the joint was higher than that in the embodiment of the present invention.
以上のように本発明は絶縁部材の先端部に一体
的にセラミツク発熱体を形成し、この絶縁部材を
ハウジングに接合するため、熱応力に対して強
く、かつ熱がハウジング部へ流れることが少な
い。 As described above, the present invention integrally forms the ceramic heating element at the tip of the insulating member and joins the insulating member to the housing, so it is resistant to thermal stress and less heat flows to the housing part. .
第８図は発熱体の温度を800℃に保持するのに
要する電力を示すものであり、本実施例は先端の
みに発熱体を形成してあるので余分の熱発生がな
く、またハウジングを通しての熱の逃げが少ない
ことを示しており、従つて、電力的に有利な省電
型である。 Figure 8 shows the power required to maintain the temperature of the heating element at 800°C. In this example, the heating element is formed only at the tip, so there is no excess heat generation, and there is no need to heat the heating element through the housing. This indicates that there is little heat loss, and therefore it is a power saving type that is advantageous in terms of power consumption.
第９図は各温度に対する抵抗値を測定したもの
であり、本実施例は従来例に比べて抵抗の上昇カ
ーブが大きい特徴を持つ。これは本実施例構造に
おいて、セラミツク発熱体の全体が発熱するよう
になつているためである。この抵抗温度係数が大
きいことはヒータ装置を制御する上で非常に有利
になる。 FIG. 9 shows measurements of resistance values at various temperatures, and this example is characterized by a larger resistance increase curve than the conventional example. This is because in the structure of this embodiment, the entire ceramic heating element generates heat. This large temperature coefficient of resistance is very advantageous in controlling the heater device.
なお、前記実施例では、セラミツク発熱体とし
てMoSi2を使用したが、TiCあるいはTiNを用い
たものでも良い。この場合、絶縁部材、発熱体、
リード線の熱膨張係数は互いに合うように添加物
材料組成を選定すればよい。また、金属リード線
も他の高融点金属、例えばMo線を用いてもよ
い。 In the above embodiment, MoSi 2 was used as the ceramic heating element, but TiC or TiN may also be used. In this case, insulating members, heating elements,
The additive material composition may be selected so that the thermal expansion coefficients of the lead wires match each other. Further, the metal lead wire may also be made of other high melting point metal, such as Mo wire.
また、本発明のセラミツクヒータ装置の用途は
デイーゼルエンジンに限定されるものではなく、
他の分野にも有効に用いることができる。 Furthermore, the application of the ceramic heater device of the present invention is not limited to diesel engines;
It can also be effectively used in other fields.
以上詳述した本発明の効果を列挙すれば次のご
とくである。
The effects of the present invention detailed above are enumerated as follows.
(1) セラミツク発熱体と絶縁部材に一体接合し、
この絶縁部材を金属ハウジングに固定したか
ら、発熱体の熱が金属ハウジングに奪われるこ
とが少なく、発熱体の熱を有効に利用できる。(1) Integrally bonded ceramic heating element and insulating member,
Since this insulating member is fixed to the metal housing, the heat of the heating element is less likely to be absorbed by the metal housing, and the heat of the heating element can be used effectively.
(2) 従来例のように発熱体をハウジングに固定せ
ずに絶縁部材に固定しているから、発熱体の確
実な固定を実現できる。(2) Since the heating element is not fixed to the housing as in the conventional example, but is fixed to the insulating member, the heating element can be securely fixed.
(3) Ｕ字発熱体の２つの端部の間のスリツト部ま
で絶縁部材で接合しているから、発熱体と絶縁
部材との接合強度が向上する。(3) Since the slit between the two ends of the U-shaped heating element is joined with the insulating member, the joining strength between the heating element and the insulating member is improved.
(4) 発熱体の全体を発熱させることができる。(4) The entire heating element can generate heat.
第１図は本発明の一実施例を示す断面図、第２
図は第１図のＢ−Ｂ断面図、第３図は第１図のＡ
−Ａ断面図、第４図は本発明における発熱部の製
作説明に供する分解斜視図、第５ａ図、第５ｂ図
は本発明における発熱部を示す平面図および側面
図、第６図乃至第９図は本発明の説明に供する特
性図、第１０図は従来例を示す断面図である。
３……金属ハウジング、４……端子部材をなす
中心電極、５……セラミツク発熱体、６……絶縁
部材。
FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and FIG.
The figure is a sectional view taken along line B-B in figure 1, and figure 3 is a cross-sectional view taken along line A in figure 1.
-A sectional view, FIG. 4 is an exploded perspective view for explaining the production of the heat generating part in the present invention, FIGS. 5a and 5b are a plan view and side view showing the heat generating part in the present invention, and FIGS. 6 to 9 The figure is a characteristic diagram for explaining the present invention, and FIG. 10 is a sectional view showing a conventional example. 3... Metal housing, 4... Center electrode forming a terminal member, 5... Ceramic heating element, 6... Insulating member.
Claims (1)
熱体のＵ字スリツト部ならびに２つの端部に一体
的に接合した電気絶縁セラミツク材料よりなる絶
縁部材と、この絶縁部材を内側に固定した金属ハ
ウジングとを備え、前記発熱体の一方の端部をリ
ード線により前記ハウジングに電気的に接続する
とともに、前記ハウジングに電気的に絶縁して設
けた端子部材にリード線により前記発熱体の他方
の端部を電気的に接続したセラミツクヒータ装
置。1 A ceramic heating element with a U-shaped longitudinal section, an insulating member made of an electrically insulating ceramic material integrally joined to the U-shaped slit portion and two ends of this heating element, and a metal fixed to the inside of the insulating member. one end of the heating element is electrically connected to the housing by a lead wire, and the other end of the heating element is connected to a terminal member provided electrically insulated from the housing by a lead wire. Ceramic heater device with electrically connected ends.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20637382A JPS5996692A (en) | 1982-11-25 | 1982-11-25 | Ceramic heater unit |
| US06/554,107 US4499366A (en) | 1982-11-25 | 1983-11-21 | Ceramic heater device |
| DE19833342753 DE3342753A1 (en) | 1982-11-25 | 1983-11-25 | CERAMIC HEATING DEVICE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20637382A JPS5996692A (en) | 1982-11-25 | 1982-11-25 | Ceramic heater unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5996692A JPS5996692A (en) | 1984-06-04 |
| JPH0241876B2 true JPH0241876B2 (en) | 1990-09-19 |
Family
ID=16522247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20637382A Granted JPS5996692A (en) | 1982-11-25 | 1982-11-25 | Ceramic heater unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5996692A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4713365A (en) * | 1986-12-29 | 1987-12-15 | Eastman Kodak Company | Adhesives for laminating thermal print elements |
| JP4683774B2 (en) * | 2001-06-28 | 2011-05-18 | 京セラ株式会社 | Ceramic heater |
| JP6275523B2 (en) * | 2014-03-25 | 2018-02-07 | 日本特殊陶業株式会社 | Glow plug |
-
1982
- 1982-11-25 JP JP20637382A patent/JPS5996692A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5996692A (en) | 1984-06-04 |
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