JPH02282462A - Formation of alumina whisker and far infrared ray heating-radiating body - Google Patents
Formation of alumina whisker and far infrared ray heating-radiating bodyInfo
- Publication number
- JPH02282462A JPH02282462A JP1103054A JP10305489A JPH02282462A JP H02282462 A JPH02282462 A JP H02282462A JP 1103054 A JP1103054 A JP 1103054A JP 10305489 A JP10305489 A JP 10305489A JP H02282462 A JPH02282462 A JP H02282462A
- Authority
- JP
- Japan
- Prior art keywords
- far
- foil
- heating
- radiating body
- stainless steel
- 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.)
- Pending
Links
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 230000015572 biosynthetic process Effects 0.000 title description 3
- 238000010438 heat treatment Methods 0.000 claims abstract description 50
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 26
- 239000010935 stainless steel Substances 0.000 claims abstract description 26
- 239000011888 foil Substances 0.000 claims abstract description 25
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000011261 inert gas Substances 0.000 abstract description 4
- 238000007747 plating Methods 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical compound [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 229910000953 kanthal Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Landscapes
- Crystals, And After-Treatments Of Crystals (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はアルミナウィスカ生成方法及び遠赤外線発熱・
放射体に係り、特にアルミナウィスカを簡便に製造でき
る方法と、熱効率を向上させ、発熱体と遠赤外線放射物
との間の剥離が防止された耐久性のよい遠赤外線発熱・
放射体に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for producing alumina whiskers and a far-infrared heat generation method.
Regarding radiators, in particular, a method for easily manufacturing alumina whiskers, and a durable far-infrared heating device that improves thermal efficiency and prevents separation between the heating element and the far-infrared radiator.
Regarding radiators.
自動車用触媒コンバータに使用されるフォイルとして、
ステンレス鋼箔の金属表面にアルミナのウィスカを形成
させることは、特開昭５７−７１８９８号公報によって
公知となっている。As a foil used in automotive catalytic converters,
The formation of alumina whiskers on the metal surface of stainless steel foil is known from Japanese Patent Laid-Open No. 71898/1983.
この方法は、アルミナウィスカの形成法として２段階の
熱処理を採用している。すなわち、第１段階ではウィス
カ前駆動体形成のための熱処理条件として、雰囲気中の
酸素濃度を所定の濃度以下に制御するために真空中又は
不活性ガス中で行い、第２段階でウィスカの駆動体が形
成されたステンレス鋼箔を酸化雰囲気中で酸化してウィ
スカの駆動体上に酸化物ウィスカを形成する方法である
。This method employs two-step heat treatment to form alumina whiskers. That is, in the first step, the heat treatment conditions for forming the whisker predriver are performed in vacuum or in an inert gas in order to control the oxygen concentration in the atmosphere to a predetermined concentration or less, and in the second step, the whisker drive is performed. This method involves oxidizing the stainless steel foil on which the whisker has been formed in an oxidizing atmosphere to form oxide whiskers on the whisker driver.
このようなアルミナウィスカ形成法を実現するためには
、ステンレス鋼箔の処理雰囲気を達成するための大がか
りで、かつ複雑な設備を必要とし、かつ操作も複雑であ
る。In order to realize such an alumina whisker forming method, large-scale and complicated equipment is required to achieve a processing atmosphere for stainless steel foil, and the operation is also complicated.
一方、近年、遠赤外線の利用が種々の産業分野で利用さ
れるようになり、注目を浴びている。遠赤外線は、分子
振動に近い振動数をもっていることから、合成樹脂、塗
料、印刷インキ、食品、木材等の加熱・乾燥の分野に利
用されている０例えば、塗装膜の乾燥および焼付け、食
料品の加工、熱可塑性樹脂の軟化及び成形、木材・パル
プの乾燥等に利用されている。On the other hand, in recent years, the use of far infrared rays has come to be used in various industrial fields and is attracting attention. Because far infrared rays have a frequency close to molecular vibration, they are used in the fields of heating and drying synthetic resins, paints, printing inks, foods, wood, etc. It is used for processing, softening and molding thermoplastic resins, drying wood and pulp, etc.
この遠赤外線を放射する放射体としては、遠赤外線の放
射率が高い酸化物系、非酸化物系のセラミックスが使用
されることが多い。この種のセラミックスを用いた従来
の遠赤外線発熱・放射体の例を第５図（Ａ） 、（Ｂ）
に示す、第５図（Ａ）においては、ニクロム線等の発熱
体５の周囲にセラミックス製の遠赤外線放射体６が配置
された構造になっており、第５図（Ｂ）においては鋼製
発熱体又は導電性セラミックス製の発熱体７の表面に溶
射等の手段で遠赤外線放射体８を付着させた構造となっ
ている。As a radiator that emits far-infrared rays, oxide-based or non-oxide-based ceramics, which have a high far-infrared emissivity, are often used. Figures 5 (A) and (B) show examples of conventional far-infrared heat generating/radiating bodies using this type of ceramics.
In FIG. 5(A), a ceramic far-infrared radiator 6 is arranged around a heating element 5 such as a nichrome wire, and in FIG. 5(B), a steel It has a structure in which a far-infrared radiator 8 is attached to the surface of a heating element or a heating element 7 made of conductive ceramics by means of thermal spraying or the like.
第５図（Ａ）に示す遠赤外線発熱・放射体の場合、発熱
体５による遠赤外線放射体に対する加熱が間接加熱であ
るため、熱効率上不利である。−方、第５図（Ｂ）に示
す遠赤外線発熱・放射体の場合、熱効率のロスが少ない
反面、発熱体７と遠赤外線放射体８との間の密着性が十
分でなく、繰り返し熱サイクル等によって、発熱体７と
遠赤外線放射体８との間で剥離が発生するおそれがある
。In the case of the far-infrared heat generating/radiating body shown in FIG. 5(A), heating of the far-infrared radiating body by the heating body 5 is indirect heating, which is disadvantageous in terms of thermal efficiency. - On the other hand, in the case of the far-infrared heat generating and radiating body shown in FIG. For example, there is a possibility that separation may occur between the heating element 7 and the far-infrared radiator 8.
また、上記のいずれの遠赤外線発熱・放射体の場合にも
、発熱体５．７はセラミックス製であるため、変形性に
乏しく、遠赤外線発熱・放射体により加熱される被加熱
体の表面形状が複雑な場合、遠赤外線発熱・放射体を被
加熱体の形状に対応した形に成形しなければならないと
いう問題がある。In addition, in the case of any of the above far-infrared heat generating/radiating bodies, since the heat generating body 5.7 is made of ceramics, it has poor deformability, and the surface shape of the heated body heated by the far-infrared heat generating/radiating body When the heating element is complicated, there is a problem in that the far-infrared heat generating/radiating body must be molded into a shape corresponding to the shape of the heated body.
更に、特開昭６１−２５９４７６号公報によれば、鉄を
基体とし、その底面の表層にアルミニウムメツキにより
鉄−アルミニウム金属間化合物を形成して遠赤外線放射
体にし、一方の鉄−アルミニウム金属間化合物を有しな
い面に抵抗発熱体または燃焼ガスによる加熱源を設ける
ことが開示されている。Furthermore, according to JP-A No. 61-259476, iron is used as a base, and an iron-aluminum intermetallic compound is formed on the surface layer of the bottom surface by aluminum plating to make a far-infrared radiator, and one iron-aluminum metal It has been disclosed to provide a heating source with a resistive heating element or combustion gas on a surface that does not have a compound.
しかしながら、この遠赤外線放射体では鉄−アルミニウ
ム金属間化合物が非常にかたく、脆い性質を有している
ため、加熱−冷却の熱サイクルや取り扱い時の変形等に
より割れが発生しやすい問題がある。However, since the iron-aluminum intermetallic compound in this far-infrared radiator is extremely hard and brittle, there is a problem in that it is prone to cracking due to thermal cycles of heating and cooling, deformation during handling, etc.
上記のような従来のアルミナウィスカ生成法では、設備
面および処理操作面で難点があり、一方、従来の遠赤外
線放射体では、熱効率上不利で、発熱体と遠赤外線放射
体の間の密着性に劣り、かつ変形性が低い問題があった
。The conventional alumina whisker generation method as described above has drawbacks in terms of equipment and processing operations.On the other hand, conventional far-infrared radiators are disadvantageous in terms of thermal efficiency and have poor adhesion between the heating element and the far-infrared radiator. There was a problem that the deformability was poor and the deformability was low.
本発明の第１の目的は、大がかりで、かつ複雑な設備を
要することなく、簡便にアルミナウィスカを形成するこ
とができるアルミナウィスカ生成方法を提供することに
ある。A first object of the present invention is to provide an alumina whisker production method that can easily form alumina whiskers without requiring large-scale and complicated equipment.
本発明の第２の目的は、熱効率に優れ、かつ発熱体と遠
赤外線放射体との間の密着性が良好で変形能を有する遠
赤外線発熱・放射体を提供することにある。A second object of the present invention is to provide a far-infrared heat generating/radiating body which has excellent thermal efficiency, good adhesion between the heating body and the far-infrared radiating body, and has deformability.
〔課題を解決するための手段〕
本発明の第１の目的は、通電により発熱可能な材料から
なると共に、Ａｌを含有又は表面にＡｆｆｉ層を有する
発熱体を通電加熱し、その表面にアルミナウィスカを生
成させること、特に発熱体を１１〜３０％Ｃｒ、３〜１
５％Ａｌを含有するステンレス鋼、又は１１〜３０％Ｃ
ｒを含有し、鋼表面にＡｌ層を有するステンレス鋼とす
ることによって達成される。[Means for Solving the Problems] A first object of the present invention is to heat a heating element made of a material that can generate heat when energized, and which contains Al or has an Affi layer on the surface. In particular, the heating element should be made of 11-30% Cr, 3-1
Stainless steel containing 5% Al or 11-30% C
This is achieved by using stainless steel containing r and having an Al layer on the steel surface.
また、本発明の第２の目的は、耐熱性金属、例えば１１
〜３０％Ｃｒを含有するステンレス鋼の表面にアルミナ
ウィスカを有する遠赤外線発熱・放射体とすることによ
って達成される。A second object of the present invention is to use heat-resistant metals such as 11
This is achieved by using a far-infrared heat generating/radiating body having alumina whiskers on the surface of stainless steel containing ~30% Cr.
本発明のアルミナウィスカ生成方法では、発熱体の端部
に電極を設け、直接通電して発熱体を適切な温度、例え
ば８５０〜９５０℃に加熱すると、Ａ２を含有又は表面
に／１層を有する発熱体表面に数μｍ程度の厚さからな
るアルミナウィスカが形成される。アルミナウィスカの
生成時の雰囲気は大気中でもよく、雰囲気制御のための
設備・操作を要しない。In the alumina whisker generation method of the present invention, an electrode is provided at the end of the heating element, and when the heating element is heated to an appropriate temperature, for example 850 to 950°C, by directly applying electricity, the heating element contains A2 or has a /1 layer on the surface. Alumina whiskers having a thickness of about several μm are formed on the surface of the heating element. The atmosphere during generation of alumina whiskers may be in the air, and no equipment or operation for controlling the atmosphere is required.
本発明の遠赤外線発熱・放射体は、その表面がアルミナ
ウィスカからなり、アスペクト比が高く、比表面積が大
きいために熱効率が向上する。発熱体表面にアルミナウ
ィスカの遠赤外線放射体が一体的に形成されるから、熱
サイクルによる発熱体と放射体との剥離は解消される。The far-infrared heat generating/radiating body of the present invention has a surface made of alumina whiskers, has a high aspect ratio, and has a large specific surface area, so that thermal efficiency is improved. Since the far-infrared radiator of alumina whiskers is integrally formed on the surface of the heating element, separation between the heating element and the radiator due to thermal cycles is eliminated.
遠赤外線放射体がアルミナウィスカからなり、発熱体の
変形に追従可能で変形能を有する。The far-infrared radiator is made of alumina whiskers and has deformability and can follow the deformation of the heating element.
以下、本発明の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below based on the drawings.
第１図は本発明のアルミナウィスカ生成方法の一実施例
を示す説明図である。第１図において、１は通電により
発熱可能な材料からなると共にＡｌを含有、又は表面に
Ａｌ層を有する発熱体を示し、この発熱体１の両端部に
電極が装着される。FIG. 1 is an explanatory diagram showing an embodiment of the alumina whisker generation method of the present invention. In FIG. 1, reference numeral 1 denotes a heating element made of a material capable of generating heat when energized and containing Al or having an Al layer on the surface. Electrodes are attached to both ends of this heating element 1.
発熱体１としては、板厚０．０２ｍｍ以上のステンレス
鋼箔が好ましく、特に１１〜３０％Ｃｒ、３〜１５％Ａ
ｌを含有するステンレス１１１４ ｆＭ、又は１１〜３
０％Ｃｒを含有し、表面にメツキ等によるＡｌ層を設け
たステンレス鋼箔が望ましい。As the heating element 1, stainless steel foil with a plate thickness of 0.02 mm or more is preferable, particularly 11 to 30% Cr, 3 to 15% A
Stainless steel containing 1114 fM, or 11-3
Stainless steel foil containing 0% Cr and having an Al layer formed by plating or the like on the surface is desirable.
発熱体として箔を用いると、箔製造工程時にその表面に
極繊細な疵が多数形成され、この疵を起点としてアルミ
ナウィスカの形成が容易となる。When foil is used as a heating element, many extremely delicate flaws are formed on its surface during the foil manufacturing process, and alumina whiskers are easily formed from these flaws.
また、上記した組成のステンレス鋼は、通常の発熱体と
して使用されるカンタル線とほぼ同様な成分を有してお
り、比抵抗及びその温度依存性はカンタル線同様の挙動
を示すことになり、特に本発明に好適である。In addition, stainless steel with the above composition has almost the same components as Kanthal wire used as a normal heating element, and the specific resistance and its temperature dependence behave similarly to Kanthal wire. It is particularly suitable for the present invention.
アルミナウィスカ生成時の雰囲気は、大気中又は真空中
若しくは、不活性ガス十大気中のいずれでもよく、発熱
体１への直接通電による加熱条件としては、８００〜１
．０００°Ｃ１特に８５０〜９５０°Ｃが好適である。The atmosphere during the generation of alumina whiskers may be air, vacuum, or an atmosphere of inert gas, and the heating conditions for direct current to the heating element 1 are 800 to 1
．． 000°C, particularly 850 to 950°C.
処理時間は加熱温度条件によって異なるが、５時間以上
、好ましくは１０時間以上である。The treatment time varies depending on the heating temperature conditions, but is 5 hours or more, preferably 10 hours or more.
上記した処理方法により、ステンレスＩ箔の発熱体ｌの
表面には、数μｍ程度のアルミナウィスカ２ａ、２ｂが
形成される。このようにして表面にアルミナウィスカ
（α−Ａ２□０．）が形成されたものは、遠赤外線発熱
・放射体として有効であり、また発熱体の選定によって
触媒コンバータとしても有効である。By the above-described treatment method, alumina whiskers 2a and 2b of about several micrometers are formed on the surface of the heating element 1 made of stainless steel I foil. In this way, alumina whiskers appear on the surface.
The one in which (α-A2□0.) is formed is effective as a far-infrared heat generating/radiating body, and depending on the selection of the heat generating body, it is also effective as a catalytic converter.
次に本発明に係る遠赤外線発熱・放射体は第２図に示す
ように耐熱性金属２１の表面にアルミナウィスカ２２を
有する構造からなる。Next, the far-infrared heat generating/radiating body according to the present invention has a structure having alumina whiskers 22 on the surface of a heat-resistant metal 21, as shown in FIG.
この遠赤外線発熱・放射体は、上記した直接通電加熱法
による本発明のアルミナウィスカ生成方法によって製造
されたちの以外に次の方法によって製造されたものでも
よい。This far-infrared heat generating/radiating body may be manufactured by the following method other than the method for producing alumina whiskers of the present invention using the direct current heating method described above.
例えば、板厚的０．０２ｍ以上で、１１〜３０％Ｃｒ、
３〜１５％Ａ２を含有するステンレス鋼箔、又は１１〜
３０％Ｃｒを含有し、表面にメツキ等によるＡｌ層（Ａ
ｆ濃度５％以上）を有するステンレス鋼箔を用い、大気
中又は真空中若しくは不活性ガス十大気中で８５０〜９
５０°Ｃ１処理時間を５時間以上、好ましくは１０時間
以上で処理すると、アルミナウィスカが形成される。For example, when the plate thickness is 0.02 m or more, 11 to 30% Cr,
Stainless steel foil containing 3-15% A2, or 11-
Contains 30% Cr, and has an Al layer (A
850 to 9 in air, vacuum, or inert gas atmosphere
Alumina whiskers are formed when the treatment time at 50° C. is 5 hours or more, preferably 10 hours or more.
特にステンレス鋼成分中のＡｎ含有量が５％以下の場合
、又はステンレス鋼表面のＡｎ含有量が５％以下の場合
、ブラスト処理等による粗面加工の後に大気中で熱処理
する方法、又は低濃度の酸素を含む雰囲気中で加熱して
ステンレス鋼表面にウィスカの形成起点を多数形成させ
、その後酸化雰囲気中でその表面を酸化してその上にア
ルミナウィスカを形成させる方法等を好適に適用するこ
とができる。In particular, when the An content in the stainless steel component is 5% or less, or when the An content on the stainless steel surface is 5% or less, heat treatment in the atmosphere after surface roughening by blasting, etc., or a low concentration A method of forming a large number of whisker formation points on the stainless steel surface by heating in an oxygen-containing atmosphere, and then oxidizing the surface in an oxidizing atmosphere to form alumina whiskers thereon is preferably applied. I can do it.
第３図は本発明にかかる遠赤外線発熱・放射体の遠赤外
線放射率を測定した結果の一例を示し、第３図中、縦軸
は黒色を呈する被加熱体への放射率に対する割合を示し
ている。第３図から明らかなようにウィスカ形成処理し
たものの遠赤外線放射率は波長１０μｍ以上の遠赤外線
を選択的に放射する遠赤外線発熱・放射体として有効で
あることがわかる。FIG. 3 shows an example of the results of measuring the far-infrared emissivity of the far-infrared heat generating/radiating body according to the present invention, and in FIG. ing. As is clear from FIG. 3, the far-infrared emissivity of the whisker-forming treated material shows that it is effective as a far-infrared heating/radiator that selectively emits far-infrared rays with a wavelength of 10 μm or more.
次にステンレス鋼板又は箔の片面にＡｌ層を設けた場合
には、ステンレス鋼板又は箔の片面にアルミナウィスカ
が形成される。また、ステンレス鋼板又は箔の両面にメ
ツキ等によるＡｌ層を設け、又はＡｊ２含有ステンレス
鋼板又は箔を大気中で熱処理した場合、ステンレス鋼板
又は箔の両面にアルミナウィスカが形成される。このよ
うな両面にアルミナウィスカを形成した遠赤外線発熱・
放射体は、第４図に示すように、その遠赤外線発熱・放
射体４１の両面側にそれぞれ被加熱体４２を配置してこ
れらを同時に処理することができる。Next, when an Al layer is provided on one side of a stainless steel plate or foil, alumina whiskers are formed on one side of the stainless steel plate or foil. Furthermore, when an Al layer is provided by plating or the like on both sides of a stainless steel plate or foil, or when an Aj2-containing stainless steel plate or foil is heat-treated in the atmosphere, alumina whiskers are formed on both sides of the stainless steel plate or foil. Far-infrared heat generation with alumina whiskers formed on both sides
As shown in FIG. 4, the radiator can be heated with objects 42 arranged on both sides of the far-infrared heat generating/radiator 41 to simultaneously process them.
さらに、本発明の遠赤外線発熱・放射体の形状は特に限
定されるものでなく、第２図に示すような面状の形状の
他に箔を内筒状に加工し、パイプ状と使用することもで
きる。Further, the shape of the far-infrared heat generating/radiating body of the present invention is not particularly limited, and in addition to the planar shape shown in FIG. 2, foil may be processed into an inner cylinder shape and used as a pipe shape. You can also do that.
以上のように、本発明のアルミナウィスカ生成方法によ
れば、直接通電加熱により大がかりで複雑な設備を要す
ることなく、簡便にアルミナウィスカが育成される。As described above, according to the alumina whisker generation method of the present invention, alumina whiskers can be easily grown by direct current heating without requiring large-scale and complicated equipment.
また、本発明の遠赤外線発熱・放射体によれば、熱効率
に優れ発熱体と放射体との間の熱サイクルによる剥離の
ない信転性の高いものが得られ、ウィスカによる高比表
面積化により遠赤外線放射効率が高く、しかもセラミッ
クス類の放射体に比べて変形能が高い効果を有する。Further, according to the far-infrared heat generating/radiating body of the present invention, it is possible to obtain a product with excellent thermal efficiency and high reliability without peeling due to thermal cycles between the heating body and the radiating body, and due to the high specific surface area due to the whiskers. It has a high far-infrared radiation efficiency and a high deformability compared to ceramic radiators.
第１図は本発明のアルミナウィスカ生成方法の一実施例
を示す説明図、第２図は本発明の遠赤外線発熱・放射体
の一実施例を示す断面図、第３図は本発明にかかる遠赤
外線発熱−放射体の遠赤外線放射率の測定結果の一例を
示すグラフ、第４図は本発明の遠赤外線発熱・放射体の
使用例を示す説明図、第５図（Ａ）、（Ｂ）は従来の遠
赤外線放射体を示す断面図である。
ｌ・・・・・・発熱体、２ａ、２ｂ・・・・・・アルミ
ナウィスカ、２１・・・・・・耐熱性金属、２２・・・
・・・アルミナウィスカ、４１・・・・・・遠赤外線発
熱・放射体、４２・・・・・・被加熱体。
代理人 弁理士 西 元 勝 −Fig. 1 is an explanatory diagram showing an embodiment of the alumina whisker generation method of the present invention, Fig. 2 is a sectional view showing an embodiment of the far-infrared heat generating/radiating body of the present invention, and Fig. 3 is a diagram showing an embodiment of the far-infrared heat generating/radiating body of the present invention. Far-infrared heat generation - A graph showing an example of the measurement results of the far-infrared emissivity of the radiator, FIG. 4 is an explanatory diagram showing an example of use of the far-infrared heat generation/radiator of the present invention, and FIGS. ) is a sectional view showing a conventional far-infrared radiator. l... Heating element, 2a, 2b... Alumina whisker, 21... Heat resistant metal, 22...
... Alumina whisker, 41 ... Far infrared heat generating/radiating body, 42 ... Heated object. Agent Patent Attorney Masaru Nishimoto −
Claims (7)
含有又は表面にＡｌ層を有する発熱体を通電加熱し、そ
の表面にアルミナウィスカを生成させることを特徴とす
るアルミナウィスカ生成方法。(1) A method for generating alumina whiskers, which comprises heating a heating element made of a material capable of generating heat when energized and containing Al or having an Al layer on the surface, and generating alumina whiskers on the surface of the heating element.
する請求項（１）記載のアルミナウィスカ生成方法。(2) The method for producing alumina whiskers according to claim 1, wherein the heating element is made of a heat-resistant metal.
５％Ａｌを含有するステンレス鋼であることを特徴とす
る請求項（２）記載のアルミナウィスカ生成方法。(3) The heat-resistant metal body contains 11 to 30% Cr, 3 to 1
The method for producing alumina whiskers according to claim 2, wherein the stainless steel contains 5% Al.
ンレス鋼の表面にＡｌ層を有することを特徴とする請求
項（１）記載のアルミナウィスカ生成方法。(4) The method for producing alumina whiskers according to claim 1, wherein the heating element has an Al layer on the surface of stainless steel containing 11 to 30% Cr.
求項（３）又は請求項（４）記載のアルミナウィスカ生
成方法。(5) The method for producing alumina whiskers according to claim (3) or claim (4), wherein the stainless steel is a foil.
とを特徴とする遠赤外線発熱・放射体。(6) A far-infrared heat generating/radiating body characterized by having alumina whiskers on the surface of a heat-resistant metal.
テンレス鋼であることを特徴とする請求項（６）記載の
遠赤外線発熱・放射体。(7) The far-infrared heat generating/radiating body according to claim (6), wherein the heat-resistant metal is stainless steel containing 11 to 30% Cr.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1103054A JPH02282462A (en) | 1989-04-21 | 1989-04-21 | Formation of alumina whisker and far infrared ray heating-radiating body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1103054A JPH02282462A (en) | 1989-04-21 | 1989-04-21 | Formation of alumina whisker and far infrared ray heating-radiating body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02282462A true JPH02282462A (en) | 1990-11-20 |
Family
ID=14343958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1103054A Pending JPH02282462A (en) | 1989-04-21 | 1989-04-21 | Formation of alumina whisker and far infrared ray heating-radiating body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02282462A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002060924A (en) * | 2000-08-23 | 2002-02-28 | Nippon Yakin Kogyo Co Ltd | Stainless steel with insulating layer |
| US6998586B2 (en) * | 2002-03-20 | 2006-02-14 | Honda Giken Kogyo Kabushiki Kaisha | Device for heating article to be treated |
-
1989
- 1989-04-21 JP JP1103054A patent/JPH02282462A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002060924A (en) * | 2000-08-23 | 2002-02-28 | Nippon Yakin Kogyo Co Ltd | Stainless steel with insulating layer |
| US6998586B2 (en) * | 2002-03-20 | 2006-02-14 | Honda Giken Kogyo Kabushiki Kaisha | Device for heating article to be treated |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6242719B1 (en) | Multiple-layered ceramic heater | |
| JPH02282462A (en) | Formation of alumina whisker and far infrared ray heating-radiating body | |
| JPH07282961A (en) | Heater | |
| EP0806488A1 (en) | Aluminum-chromium alloy, method for its production and its applications | |
| JPS63232285A (en) | Substrate for supporting electrical element and manufacture of the same | |
| US4536645A (en) | Solid-body heating unit | |
| KR970705823A (en) | THERMAL HEAD AND ITS MANUFACTURE | |
| JP2007184289A (en) | Heater | |
| CN1496233A (en) | Cooking device comprising non-planar, multi-dimensionally configured cooking surface composed of glass or glass ceramic | |
| JPS5948955B2 (en) | Iron, chromium, aluminum alloy with reticulated alumina coating and method for producing the same | |
| JPS6033249A (en) | Infrared ray radiator | |
| JPH0384391A (en) | Production of far infrared ray radiator | |
| JP3090962B2 (en) | Metal substrate and method of manufacturing the same | |
| JPH04238872A (en) | Molding apparatus made of composite material for performing hot pressing of member consisting of heat-resistant material | |
| JPS54118441A (en) | Manufacturing of electric cooker | |
| JPS61225801A (en) | Far infrared radiation heat generating body | |
| JPS6337587A (en) | Ceramic heater | |
| JPH04209588A (en) | Metallic substrate | |
| JPH0247592Y2 (en) | ||
| JPS63160188A (en) | Infrared heater | |
| JPS62291881A (en) | Infrared radiating unit | |
| JPS6168380A (en) | Ceramic infrared radiator and manufacture | |
| JPH0384392A (en) | Production of far infrared ray radiator | |
| JPH03181337A (en) | Self-heating catalyst carrier having superior insulating property | |
| JPH05299155A (en) | Flame spraying heating element generating far infrared radiation |