JPS6344270B2 - - Google Patents
Info
- Publication number
- JPS6344270B2 JPS6344270B2 JP8642481A JP8642481A JPS6344270B2 JP S6344270 B2 JPS6344270 B2 JP S6344270B2 JP 8642481 A JP8642481 A JP 8642481A JP 8642481 A JP8642481 A JP 8642481A JP S6344270 B2 JPS6344270 B2 JP S6344270B2
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- ceramic tube
- heating element
- heating wire
- nio
- 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
- 239000000919 ceramic Substances 0.000 claims description 37
- 238000010438 heat treatment Methods 0.000 claims description 29
- 229910021193 La 2 O 3 Inorganic materials 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000011247 coating layer Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Description
本発明はセラミツク発熱体に関し、特に寿命の
長いセラミツク発熱体を提供するものである。
最近、調理のスピード化、また暖房等空調関係
のスピード化に伴い、これらの熱源として、安価
で、速熱性を有するセラミツク発熱体の使用が増
えている。
一般にセラミツク発熱体はセラミツク管に電熱
線を挿入してなり通電中に電熱線とセラミツク管
とが接触すると、セラミツク管の成分であるケイ
素やカルシウムが電熱線と反応し、電熱線の寿命
を著しく低下させるという欠点を有していた。
本発明は、上記従来の欠点を解消し、所期の目
的を達成するセラミツク発熱体を提供しようとす
るものである。
本発明者らは、NiO，CoO，WO3，Nb2O5，
Y2O3，CeO2，La2O3の群から選ばれる少なくと
も一種の酸化物をセラミツク管の内側に被覆また
は位置せしめたものを用いることにより、寿命の
長いセラミツク発熱体を得ることができるという
結論を得た。
これは、上記セラミツク管と電熱線とが使用中
に反応し、電熱線の表面に緻密で安定な保護皮膜
が形成され、セラミツク管の成分であるケイ素や
カルシウム等との反応が抑制されるため電熱線の
寿命が長くなると想定される。
なお、セラミツク管の内側に被膜または位置せ
しめる方法として、溶射，塗布，浸漬等の方法を
利用すればよい。
以下、本発明の具体的な実施例について添付図
を参照して説明する。
〔実施例 １〕
図において、１はシリカを主成分とするセラミ
ツク管、２はセラミツク管１に挿入されたニクロ
ム線または鉄―クロム―アルミ線等の金属抵抗発
熱体からなるコイル状の電熱線、３はセラミツク
管１の端部を支持する陶器製の支持部材、４はセ
ラミツク管１の端部と支持部材３との間に介在し
セラミツク管１の端部開口を封口する封口部材、
５は電熱線１の両端に接続された端子金具であり
支持部材３と封口部材４を貫通している。
６は、セラミツク管１の内側にもうけた被膜層
であり、NiOとCoOを１対１の割合で混合したも
のを溶射して形成されている。
〔実施例 ２〕
NiO，CoO、及びNb2O5を重量比で３対１対１
の割合で均一に混合し、この混合物に対して、重
量比で10％の有機バインダーを混練し、ペースト
を作成し、このペーストをシリカを主成分とする
セラミツク管１の内側にコーライングし、1000℃
で熱処理し、上記NiO，CoO及びNb2O5の混合物
の被覆層６を形成した。
上記処理したセラミツク管１を用いて、実施例
１と同様のセラミツク発熱体を完成した。
なお、比較のために、従来例として、シリカを
主成分とした従来のセラミツク管１を使用し、被
覆層６を形成しないセラミツク発熱体を完成し
た。
完成したそれぞれのセラミツク発熱体のセラミ
ツク管温度が800℃に維持されるように電熱線２
に連続通電し、電熱線２が断線するまでの日数を
調べた。この結果を第１表に示す。
The present invention relates to a ceramic heating element, and particularly to providing a ceramic heating element with a long life. Recently, as the speed of cooking and heating and other air conditioning systems has increased, the use of inexpensive ceramic heating elements that heat quickly has been increasing as heat sources. In general, ceramic heating elements are made by inserting a heating wire into a ceramic tube. If the heating wire and the ceramic tube come into contact with each other while electricity is being applied, silicon and calcium, which are components of the ceramic tube, will react with the heating wire, significantly shortening the life of the heating wire. It had the disadvantage of lowering the The present invention aims to eliminate the above-mentioned conventional drawbacks and provide a ceramic heating element that achieves the intended purpose. The present inventors discovered NiO, CoO, WO 3 , Nb 2 O 5 ,
By using a ceramic tube in which at least one oxide selected from the group of Y 2 O 3 , CeO 2 , and La 2 O 3 is coated or placed inside, a ceramic heating element with a long life can be obtained. I came to this conclusion. This is because the ceramic tube and the heating wire react during use, forming a dense and stable protective film on the surface of the heating wire, which suppresses the reaction with silicon, calcium, etc., which are the components of the ceramic tube. It is assumed that the life of the heating wire will be longer. Note that methods such as thermal spraying, coating, and dipping may be used as a method for coating or positioning the inside of the ceramic tube. Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. [Example 1] In the figure, 1 is a ceramic tube mainly composed of silica, and 2 is a coiled heating wire made of a metal resistance heating element such as a nichrome wire or an iron-chrome-aluminum wire inserted into the ceramic tube 1. , 3 is a ceramic support member that supports the end of the ceramic tube 1; 4 is a sealing member that is interposed between the end of the ceramic tube 1 and the support member 3 and seals the opening at the end of the ceramic tube 1;
Terminal fittings 5 are connected to both ends of the heating wire 1 and pass through the support member 3 and the sealing member 4. Reference numeral 6 denotes a coating layer provided inside the ceramic tube 1, and is formed by thermal spraying a mixture of NiO and CoO at a ratio of 1:1. [Example 2] NiO, CoO, and Nb 2 O 5 in a weight ratio of 3:1:1
10% by weight of organic binder is kneaded into this mixture to create a paste, and this paste is coated inside a ceramic tube 1 mainly composed of silica. 1000℃
A coating layer 6 of the mixture of NiO, CoO and Nb 2 O 5 was formed. Using the above-treated ceramic tube 1, a ceramic heating element similar to that of Example 1 was completed. For comparison, as a conventional example, a ceramic heating element without the coating layer 6 was completed using a conventional ceramic tube 1 mainly composed of silica. The heating wire 2 was used to maintain the ceramic tube temperature of each completed ceramic heating element at 800℃.
The number of days until the heating wire 2 was disconnected was investigated by applying electricity continuously. The results are shown in Table 1.
【表】
表１表より明らかなように、NiO，CoOおよび
Nb2O5をセラミツク管１の内側に被覆または位置
せしめたセラミツク発熱体は従来品に比較して寿
命が長くなつた。
なお、実施例１，２で示したNiO，CoO、
Nb2O5の酸化物以外に、WO3，Y2O3，CeO2，
La2O3から選ばれる酸化物であつても同様の傾向
を示した。
また、セラミツク管は、実施例で示したシリカ
を主成分とするもの以外にアルミナ，マグネシ
ア，ジルコニアを主成分とするものでも良い。
以上の説明から明らかなように、NiO，CoO，
WO3，Nb2O5，Y2O3，CeO2，La2O3の群から選
ばれる少なくとも一種の酸化物を、セラミツク管
の内側に被覆または位置せしめることにより寿命
の長いセラミツク発熱体を提供することができ
る。[Table] As is clear from Table 1, NiO, CoO and
The ceramic heating element in which Nb 2 O 5 is coated or placed inside the ceramic tube 1 has a longer lifespan than conventional products. In addition, NiO, CoO shown in Examples 1 and 2,
In addition to Nb 2 O 5 oxides, WO 3 , Y 2 O 3 , CeO 2 ,
Similar trends were observed for oxides selected from La 2 O 3 . Further, the ceramic tube may be made of alumina, magnesia, or zirconia as a main component other than the one mainly composed of silica shown in the embodiment. As is clear from the above explanation, NiO, CoO,
By coating or positioning at least one oxide selected from the group of WO 3 , Nb 2 O 5 , Y 2 O 3 , CeO 2 , and La 2 O 3 on the inside of the ceramic tube, a ceramic heating element with a long life can be obtained. can be provided.
図は本発明の一実施例を示すセラミツク発熱体
一部欠截正面図である。
１…セラミツク管、２…電熱線、６…被膜層。
The figure is a partially cutaway front view of a ceramic heating element showing an embodiment of the present invention. 1...Ceramic tube, 2...Heating wire, 6...Coating layer.
Claims (1)
ラミツク発熱体において、セラミツク管の内側
に、NiO，CoO，WO3，Nb2O5，Y2O3，CeO2，
La2O3の群から選ばれる少なくとも一種の酸化物
を被覆または位置せしめてなるセラミツク発熱
体。1. In a ceramic heating element in which a heating wire is installed inside a ceramic tube, NiO, CoO, WO 3 , Nb 2 O 5 , Y 2 O 3 , CeO 2 ,
A ceramic heating element coated with or coated with at least one oxide selected from the group of La 2 O 3 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8642481A JPS57200274A (en) | 1981-06-04 | 1981-06-04 | Ceramic heating body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8642481A JPS57200274A (en) | 1981-06-04 | 1981-06-04 | Ceramic heating body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57200274A JPS57200274A (en) | 1982-12-08 |
| JPS6344270B2 true JPS6344270B2 (en) | 1988-09-05 |
Family
ID=13886506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8642481A Granted JPS57200274A (en) | 1981-06-04 | 1981-06-04 | Ceramic heating body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57200274A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1184921B (en) * | 1985-03-22 | 1987-10-28 | Cselt Centro Studi Lab Telecom | PROCEDURE FOR THE TREATMENT OF THE HEATING ELEMENT OF OVENS FOR THE SPINNING OF OPTICAL FIBERS |
| JPH0480528A (en) * | 1990-07-20 | 1992-03-13 | Toshiba Corp | Deodoring device of heating and cooking apparatus |
-
1981
- 1981-06-04 JP JP8642481A patent/JPS57200274A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57200274A (en) | 1982-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5393499A (en) | Heated cellular substrates | |
| EP0595076A2 (en) | Fluid heater and method | |
| KR950008544B1 (en) | Catalytic heat generator | |
| DE58900273D1 (en) | HIGH TEMPERATURE HEATING SYSTEMS AND METHOD FOR THE PRODUCTION THEREOF. | |
| JPS6344270B2 (en) | ||
| US2966430A (en) | Electric resistance elements | |
| EP0392841A3 (en) | Ceramic coated wires and thermocouples | |
| JP3009507B2 (en) | Resistance adjustment type heater and heater unit | |
| JPS55162446A (en) | High strength ceramic color baked windowpane plate for car | |
| JPS54106943A (en) | Heater member and production thereof | |
| JP3245337B2 (en) | Heating heater, fixing heat roller, and fixing device | |
| JPH0517834Y2 (en) | ||
| JPS6340360B2 (en) | ||
| JPS5934233B2 (en) | far infrared radiation device | |
| JPS6344963Y2 (en) | ||
| JPS568536A (en) | Gas component detecting elenent | |
| JP3009166B2 (en) | Surface treatment method for ceramics | |
| JPH0410717B2 (en) | ||
| JP2517158B2 (en) | Heating element | |
| JPH0311072B2 (en) | ||
| JPS61110989A (en) | Far infrared heater | |
| JPH0148625B2 (en) | ||
| JPS63301482A (en) | Manufacture of ceramic heater | |
| JPH08155266A (en) | Deodorizing heater and deodorizing apparatus | |
| JPH0313714B2 (en) |