JPS6326985A - Electrically insulating fire-resistant material for electric heater employing fe-cr-al system heating unit - Google Patents
Electrically insulating fire-resistant material for electric heater employing fe-cr-al system heating unitInfo
- Publication number
- JPS6326985A JPS6326985A JP61170461A JP17046186A JPS6326985A JP S6326985 A JPS6326985 A JP S6326985A JP 61170461 A JP61170461 A JP 61170461A JP 17046186 A JP17046186 A JP 17046186A JP S6326985 A JPS6326985 A JP S6326985A
- Authority
- JP
- Japan
- Prior art keywords
- electrically insulating
- heating unit
- electric heater
- resistant material
- heating 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
- 238000010438 heat treatment Methods 0.000 title claims description 17
- 239000000463 material Substances 0.000 title description 4
- 230000009970 fire resistant effect Effects 0.000 title 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 4
- 238000005485 electric heating Methods 0.000 claims description 4
- 239000011819 refractory material Substances 0.000 claims description 4
- 229910002060 Fe-Cr-Al alloy Inorganic materials 0.000 claims 1
- 238000010292 electrical insulation Methods 0.000 claims 1
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 239000011651 chromium Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000004584 weight gain Effects 0.000 description 2
- 235000019786 weight gain Nutrition 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910000953 kanthal Inorganic materials 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
- C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Resistance Heating (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
高温電熱装置用金属発熱体としては、一般的には、Ｎ
ｉ−Ｃｒ系にクローム線）及びＦｅ−Ｃｒ−Ａｚ系（代
表的には、カンタル線）の２種類が、実用に供されてお
り、後者の方が、より高温に耐えるのである。[Detailed Description of the Invention] Generally, N is used as a metal heating element for high-temperature electric heating devices.
Two types are in practical use: i-Cr type (chromium wire) and Fe-Cr-Az type (typically Kanthal wire), and the latter is more resistant to high temperatures.
本発明は、名称に示す通り、後者に適用されるものであ
る。As the name suggests, the present invention is applied to the latter.
金属発熱体は、主として、空気中で、高温に加熱される
ので、酸化腐蝕が進行し、やがて断線するのである。高
温用電熱装置としては、発熱体の酸化損傷が、最も重要
な課趙であって、発熱体の材質の改良が進められている
のであるが、未だ充分とは言い得ないのである。Since the metal heating element is heated to high temperatures mainly in the air, oxidation corrosion progresses and the wire eventually breaks. For high-temperature electric heating devices, oxidation damage to the heating element is the most important issue, and although progress is being made to improve the material of the heating element, it cannot be said to be sufficient yet.
金属発熱体は、丸線状のものはＣｏ１１状に巻いた状態
で、帯状のものは、ジクザク状に曲げた状態で、電気絶
縁耐火物に設けられている溝に挿入して支持されて、電
熱装置を構成しているのである。本発明は、この電気絶
縁耐火物の材質とその機能に関するものである。The metal heating element is supported by being inserted into a groove provided in an electrically insulating refractory, with round wire-shaped ones wound in a Co11 shape, and band-shaped ones bent into a zigzag shape. It constitutes an electric heating device. The present invention relates to the material of this electrically insulating refractory and its function.
この電気絶縁耐火物は、特許請求範囲に示しているよう
に、０．１％以上の８２０３を含有していることを、特
徴とするのである。Ｂ２Ｏ３を含有するものを用いるこ
とによって、高温における、発熱体の酸イヒ速度がゆる
やかになり、従って、発熱体の寿命が長くなるのである
。This electrically insulating refractory is characterized by containing 0.1% or more of 8203, as shown in the claims. By using a material containing B2O3, the rate of acidification of the heating element at high temperatures is slowed down, and the life of the heating element is therefore extended.
以下に、この実験結果を述べる。The results of this experiment are described below.
実験に用いた発熱体は、材質は、Ｆｅ−Ｃｒ−Ａ、を系
でＦｅ７１％、Ｃｒ２３％、Ａｌ６％なる１ヒ学組成の
らので線径 １．５Ｌ長さ約１，３ｍのものを、外径１
０ ＋のＣｏ１１状にしたものである。The heating element used in the experiment was made of Fe-Cr-A with a chemical composition of 71% Fe, 23% Cr, and 6% Al, and had a wire diameter of 1.5L and a length of about 1.3 m. , outer diameter 1
It is made into 0 + Co11 form.
電気絶縁耐火物としては、珪酸アルミニュームを緘維状
にした所謂セラミック・ファイバーを主体とし、それに
結合材を添加して、圧縮成形して、焼結した軽量耐火物
で、比重的０．６、気孔率的７８％、その基本化学組成
は、Ａｌ２０３５Ｌ２％、 Ｓｉ ０２４０．３％、Ｃ
ａ Ｏ５，５％で、それに所要量の８２０３を添加した
ものである。Electrical insulating refractories are mainly made of so-called ceramic fibers made of aluminum silicate fibers, with a binder added thereto, compression molded, and sintered to produce lightweight refractories with a specific gravity of 0.6. , porosity 78%, its basic chemical composition is Al2035L2%, Si0240.3%, C
a O5.5%, to which the required amount of 8203 was added.
この電気絶縁耐火物に、中１０＋１１１．深さ１５＋ｕ
、長さは上記Ｃｏ１１全長より多少長くして、Ｃｏ１１
を収納し得る溝を構成したものを、Ｃｏ１１収納具とし
て、実験に供するに当たり、Ｂ２Ｏ３の含有量によって
、０％のもの、０．２％のもの及び０．５％のものを、
夫々Ａ、Ｂ及びＣＣｏ１１収納具と称することにする。Medium 10+111. depth 15+u
, the length is slightly longer than the total length of Co11 above, and Co11
When using a device with a groove that can store B2O3 as a Co11 storage device for experiments, 0%, 0.2%, and 0.5% were used, depending on the B2O3 content.
They will be referred to as A, B, and CCo11 storage devices, respectively.
これ等のＣｏ１１収納具に、前述したＣｏ１１状発熱体
を挿入し、それを空気中で、１３００°Ｃに加熱して、
加熱時間毎の、Ｃｏ１１状発熱体の酸化増量を求め、そ
れを重量百分率（Ｃｏｉｌ状発熱体の初期重量の）で示
せば、第１表に示す通りの結果を得たのである。Insert the above-mentioned Co11 heating element into these Co11 storage devices and heat it to 1300°C in the air.
By determining the oxidation weight gain of the Co11 heating element for each heating time and expressing it as a weight percentage (of the initial weight of the coil heating element), the results shown in Table 1 were obtained.
第１表
第１表より明らかなように、Ｃｏｎ状発熱体の酸化増量
は、Ａが最大でＣが最小であって、３５０時間時には、
ＣはＡの７０％程度で、時間の経過と瓢もに、その比が
、更に増大する傾向にあること及びＢの酸１ヒ増菫もＡ
より少ないことと併せて、それは、Ｃｏ１１収納具中の
Ｂ、０３の有無によることが明らかである。As is clear from Table 1, the oxidation weight gain of the Con-shaped heating element is maximum for A and minimum for C, and at 350 hours,
C is about 70% of A, and with the passage of time, the ratio tends to further increase, and the increase in acid of B by 1% is also the same as that of A.
In addition to being smaller, it is clear that this depends on the presence or absence of B, 03 in the Co11 container.
以上に述べたことから、Ｆｅ−Ｃｒ−ＡＬ系発熱体を用
いた電熱装置に、Ｂ２０．を含有する電気絶縁耐火物を
、発熱体の支持及びその他の構造用耐火物とすれば、発
熱体の酸化速度をゆるやかにし、その寿命を長くし得る
ことを理解し得るのである。From the above, B20. It can be understood that by using an electrically insulating refractory containing the above as a support for a heating element and other structural refractories, the oxidation rate of the heating element can be slowed down and its lifespan can be extended.
Claims (1)
Ｆｅ−Ｃｒ−Ａｌ系発熱体を用いた電熱装置用電気絶縁
耐火物Contains 0.1% or more of B_2〇_3 (boric anhydride),
Electrical insulation refractories for electric heating devices using Fe-Cr-Al heating elements
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61170461A JPH0612694B2 (en) | 1986-07-19 | 1986-07-19 | Electrically insulating refractory for electric heating device using Fe-Cr-Al heating element |
| PCT/JP1987/000528 WO1988000576A1 (en) | 1986-07-19 | 1987-07-20 | Borate-containing insulating refractory for use in electric heater |
| KR1019880700292A KR880701691A (en) | 1986-07-19 | 1988-03-16 | Electric insulation refractory material for heat transfer devices containing borate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61170461A JPH0612694B2 (en) | 1986-07-19 | 1986-07-19 | Electrically insulating refractory for electric heating device using Fe-Cr-Al heating element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6326985A true JPS6326985A (en) | 1988-02-04 |
| JPH0612694B2 JPH0612694B2 (en) | 1994-02-16 |
Family
ID=15905366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61170461A Expired - Lifetime JPH0612694B2 (en) | 1986-07-19 | 1986-07-19 | Electrically insulating refractory for electric heating device using Fe-Cr-Al heating element |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0612694B2 (en) |
| KR (1) | KR880701691A (en) |
| WO (1) | WO1988000576A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5506389A (en) * | 1993-11-10 | 1996-04-09 | Tokyo Electron Kabushiki Kaisha | Thermal processing furnace and fabrication method thereof |
| US8968010B2 (en) | 2012-03-16 | 2015-03-03 | Dai-Ichi Seiko Co., Ltd. | Press-fit type connector terminal |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6021448A (en) * | 1983-07-15 | 1985-02-02 | Mitsubishi Heavy Ind Ltd | Ultrasonic wave inspection apparatus |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4923807A (en) * | 1972-06-28 | 1974-03-02 | ||
| JPS6021448B2 (en) * | 1978-12-28 | 1985-05-28 | 松下電器産業株式会社 | Electrical insulating material for burying metal heater wires and method for manufacturing the same |
| JPS5673665A (en) * | 1979-11-14 | 1981-06-18 | Ngk Spark Plug Co | Low expansion high strength ceramic composition |
-
1986
- 1986-07-19 JP JP61170461A patent/JPH0612694B2/en not_active Expired - Lifetime
-
1987
- 1987-07-20 WO PCT/JP1987/000528 patent/WO1988000576A1/en unknown
-
1988
- 1988-03-16 KR KR1019880700292A patent/KR880701691A/en not_active Application Discontinuation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6021448A (en) * | 1983-07-15 | 1985-02-02 | Mitsubishi Heavy Ind Ltd | Ultrasonic wave inspection apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5506389A (en) * | 1993-11-10 | 1996-04-09 | Tokyo Electron Kabushiki Kaisha | Thermal processing furnace and fabrication method thereof |
| US8968010B2 (en) | 2012-03-16 | 2015-03-03 | Dai-Ichi Seiko Co., Ltd. | Press-fit type connector terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| KR880701691A (en) | 1988-11-04 |
| JPH0612694B2 (en) | 1994-02-16 |
| WO1988000576A1 (en) | 1988-01-28 |
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