JPH01288740A - Thermocouple protective tube and manufacture thereof - Google Patents
Thermocouple protective tube and manufacture thereofInfo
- Publication number
- JPH01288740A JPH01288740A JP11897488A JP11897488A JPH01288740A JP H01288740 A JPH01288740 A JP H01288740A JP 11897488 A JP11897488 A JP 11897488A JP 11897488 A JP11897488 A JP 11897488A JP H01288740 A JPH01288740 A JP H01288740A
- Authority
- JP
- Japan
- Prior art keywords
- protective tube
- oxide
- molten metal
- protection tube
- layer
- 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
- 230000001681 protective effect Effects 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 239000000843 powder Substances 0.000 claims abstract description 16
- 239000011225 non-oxide ceramic Substances 0.000 claims abstract description 10
- 229910052575 non-oxide ceramic Inorganic materials 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims 2
- 239000011247 coating layer Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 21
- 239000002184 metal Substances 0.000 abstract description 21
- 230000003647 oxidation Effects 0.000 abstract description 8
- 238000007254 oxidation reaction Methods 0.000 abstract description 8
- 239000002002 slurry Substances 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract 2
- 239000000919 ceramic Substances 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
- 230000035939 shock Effects 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000009529 body temperature measurement Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- BYFGZMCJNACEKR-UHFFFAOYSA-N aluminium(i) oxide Chemical compound [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910003564 SiAlON Inorganic materials 0.000 description 1
- 229910007948 ZrB2 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- VWZIXVXBCBBRGP-UHFFFAOYSA-N boron;zirconium Chemical compound B#[Zr]#B VWZIXVXBCBBRGP-UHFFFAOYSA-N 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は溶融金属などの湯温を計測することのできる熱
電対保護管とその製法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a thermocouple protection tube that can measure the temperature of molten metal, etc., and a method for manufacturing the same.
［従来の技術］
従来では溶融金属の湯温を計測するために消耗型の投込
み熱電対が主体であったが、最近では定常的に計測でき
る溶融金属に対する耐食性の高いサイアロン、ＢＮ、
Ａｌｘ０ｓ−Ｃ，ＺｒＯｇ−Ｍｏ、ＺｒＢａなどの熱電
対保護管が溶銑、溶鋼や溶融金属で使用されている。[Conventional technology] Traditionally, consumable immersion thermocouples were used to measure the temperature of molten metal, but recently, sialon, BN,
Thermocouple protection tubes such as Alx0s-C, ZrOg-Mo, and ZrBa are used for hot metal, molten steel, and molten metal.
［発明の解決しようとする課題］
しかしながら、従来の熱電対保護管の多くは非酸化物系
セラミックスを主成分とする焼結体で構成されており、
溶鋼、溶銑などの溶融金属に投入する際の予熱や測温中
に著しい酸化を起こす。サイアロンは耐食性の低いＳｉ
Ｏ□質酸化膜酸化膜はＢｔｕｓ、 Ｈｚとして揮散し消
耗する。また、＾１ａＯｉ−ＣではＣａｒｂｏｎが５０
０℃より酸化し組織がポーラス化し耐食性が低下する。[Problems to be solved by the invention] However, most conventional thermocouple protection tubes are composed of sintered bodies mainly composed of non-oxide ceramics.
Significant oxidation occurs during preheating and temperature measurement when pouring into molten metals such as molten steel and hot metal. Sialon is Si with low corrosion resistance.
Oxide oxide film The oxide film evaporates and is consumed as Btus, Hz. Also, Carbon is 50 in ^1aOi-C
Oxidation occurs from 0°C, the structure becomes porous, and corrosion resistance decreases.
また、ＺｒＯ□−ＭｏではＭｏが酸化し組織が脆弱化し
耐食性が低下する。In addition, in ZrO□-Mo, Mo is oxidized, the structure becomes brittle, and corrosion resistance is reduced.
本発明は、溶融金属湯中に投入する際の予熱や測温中に
起こる非酸化物系セラミックスの酸化を抑制し、その酸
化によって起こる耐食性の低下組織の脆弱化を防止する
ことを目的とするものである。The purpose of the present invention is to suppress the oxidation of non-oxide ceramics that occurs during preheating and temperature measurement when pouring into molten metal, and to prevent the deterioration of corrosion resistance and weakening of the structure caused by the oxidation. It is something.
［課題を解決するための手段］
本発明は、前述の問題点を解決すべくなされたものであ
り、Ｚ「の硼化などの非酸化物系を主成分とする焼結体
保護管の外表面にガラス質層を形成したことを特徴とし
た保護管を提供するものである。[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems, and provides an outer layer for a sintered protective tube whose main component is a non-oxide system such as boriding of Z. The present invention provides a protective tube characterized by having a glassy layer formed on its surface.
以下図面を参照して説明する。This will be explained below with reference to the drawings.
第１図は本発明の基本的構成を説明する断面図であり、
本発明保護管！はＺｒの硼化物などを主成分とする保護
管本体１ａの外表面に好ましくは耐火粉末およびガラス
化物の泥漿をコートしたものを５００℃以上で熱処理し
たガラス質層皮膜１１）を形成させたものである。この
保護管１の中には熱電対２及びＡｌｔｏｓ絶縁管３及び
Ａｌ２Ｏ，保護管４が組み込まれて使用される。即ち、
これでこの保護管１を溶湯の中に装入して連続的に溶湯
の温度変化を計測できる装置となる。FIG. 1 is a sectional view illustrating the basic configuration of the present invention,
Inventive protection tube! The outer surface of the protective tube body 1a whose main component is Zr boride or the like is preferably coated with refractory powder and vitrified slurry, and then heat-treated at 500°C or higher to form a vitreous layer coating 11). It is. A thermocouple 2, an Altos insulation tube 3, an Al2O, and a protection tube 4 are incorporated into the protection tube 1 and used. That is,
This provides a device that can continuously measure temperature changes in the molten metal by inserting the protective tube 1 into the molten metal.
以下本体１ａ及び１ｂからなる保護管１についてさらに
説明する。本発明において、本体１ａば、非酸化物系の
セラミックス焼結体からなるもので溶湯に対する高温耐
食性の点からＺｒＢｇ（２硼化ジルコニウム）を主成分
とするものが最適である。The protection tube 1 consisting of main bodies 1a and 1b will be further explained below. In the present invention, the main body 1a is preferably made of a non-oxide ceramic sintered body and contains ZrBg (zirconium diboride) as a main component from the viewpoint of high-temperature corrosion resistance against molten metal.
適切な焼結体は次のようなものである。A suitable sintered body is as follows.
、組成
２「の硼化物を主成分とし、副成分として、５ｉＣＪＩ
？ＢＮなどを含むもの例えば重量％で、ＺｒＢｚ９５〜
７０％、ＳｉＣＩ 〜！５％、ＢＮ４〜２９％などのも
の
・物 性
嵩比重 ３．０〜６１口
抗折強度 １０Ｋｇ／ｍｍ”以上
熱膨張率 ０．６％以下（１０００℃）比抵抗
ｌｏ−１Ωｃｍ以上（１５００℃）耐熱衝撃性（△Ｔ）
２５０〜１０００℃なお、耐熱衝撃性とは電気炉中で各
温度に５分間急熱し水中に急冷した試料の曲げ強度を測
定し、強度が急激に低下した試料の処理温度を示すもの
で（△Ｔ”Ｃ）を表わす。, Composition 2" boride is the main component, and as a subcomponent, 5iCJI
? Containing BN etc. For example, in weight%, ZrBz95~
70%, SiCI~! 5%, BN4-29%, etc./Physical properties Bulk specific gravity 3.0-61 Neck bending strength 10Kg/mm" or more Thermal expansion coefficient 0.6% or less (1000℃) Specific resistance
Lo-1Ωcm or more (1500℃) Thermal shock resistance (△T)
250-1000℃ Thermal shock resistance refers to the bending strength of samples that were rapidly heated to each temperature for 5 minutes in an electric furnace and then rapidly cooled in water, and indicates the processing temperature at which the strength suddenly decreased (△ T”C).
比抵抗は、４端子法で高温で測定した値を示す。（１５
００℃）Ωｃｍ
本発明における非酸化物系セラミックス焼結体としては
、このＺｒＢａ系のほか、ＴｉＢａ系、サイアロン系な
ども使用可能であるが、ＺｒＢａ系に比べ、高温でのス
ラグや金属溶湯に対する耐食性が低く、またＴｉＢｓ系
では耐酸化性が悪くなるなどの点で劣るものであること
は否めない。以下ＺｒＢｇ質本体を中心に説明する。The specific resistance indicates a value measured at high temperature using a four-probe method. (15
00°C) Ωcm In addition to the ZrBa type, TiBa type, SiAlON type, etc. can be used as the non-oxide ceramic sintered body in the present invention, but compared to the ZrBa type, they are less resistant to slag and molten metal at high temperatures. It cannot be denied that the corrosion resistance is low, and TiBs-based materials are inferior in terms of poor oxidation resistance. The ZrBg main body will be mainly explained below.
このようなＺ「の硼化物を主成分とする保護管は溶湯に
投入する場合、熱衝撃性が低いため１分に予熱して溶湯
へ投入される。しかし、ＺｒＢｚ質保護管はある程度の
耐酸化性を持っているが、長時間の予熱では徐々に酸化
し、Ｚｒ０ｚと８２０ｚ、 ５ｉｎｓの酸化物となり酸
化組織はポーラス化する。８□０．は飛散するがこのポ
ーラス化した組織の保護管でも外表面な溶湯の中へ投入
すれば容易に侵食され、保護管の肉厚は減少し耐用は短
くなる。この予熱中におけるＺｒＢｚ質保護など外表面
層の酸化を防止することのできるものとして、本発明で
はガラス質層を形成したものとしておくのである。When a ZrBz protection tube whose main component is boride is thrown into the molten metal, it is preheated for one minute before being thrown into the molten metal because it has low thermal shock resistance.However, the ZrBz protection tube has a certain degree of acid resistance. However, when preheated for a long time, it gradually oxidizes and becomes oxides of Zr0z, 820z, and 5ins, and the oxidized structure becomes porous.8□0. scatters, but the protective tube of this porous structure However, if it is poured into the molten metal on the outer surface, it will be easily eroded, reducing the thickness of the protective tube and shortening its service life. In the present invention, a glassy layer is formed.
本発明でこのガラス質層１ｂについて具体的に次に説明
する。このガラス質層は本質的には空気を通さないもの
であればどのようなものであっても良いのであるが、熱
処理で、易ガラス化しつると同時に耐火性も備えている
ことが望ましいため次のようなものが適切である。In the present invention, this glassy layer 1b will be specifically explained below. This vitreous layer can be made of any material as long as it is essentially impermeable to air, but it is desirable that it can be made easily vitrified through heat treatment, and at the same time have fire resistance. Something like is appropriate.
・ガラス質層の性能
１０００℃、３時間処理したときのＺｒＢｚ質本体の酸
化消耗率は１％以下、酸化される厚み１００ ｕ以下、
軟化点２０００℃以上・ガラス質層の厚み、
５００〜２０００μ 軟化点１２００℃以」二・ガラ
ス質をもたらす組成
耐火粉末とガラス化物を主成分とした被覆材を結合材で
泥漿状にしたもの
例えば両者の割合は、耐火粉末５０〜８５巾量％、ガラ
ス化物５０〜１５重量％からなるもの
耐火粉末はＡＩＪ、粉末、粘土粉末などガラス化物は並
板ガラス粉末、無水硼砂など
本発明保護管はこのような耐火粉末及びガラス化物な泥
漿状にして保護管本体外表面にコートしてこれを電気炉
中で５００℃以上、好ましくは８００〜１２００℃程度
の温度で熱処理しガラス化皮膜を形成することで得られ
る。このガラス化皮膜は溶湯中に投入されるまえの予熱
ではガラス皮膜を形成しているため空気を通さないので
ＺｒＢｚ質保護管は酸化されず、溶湯に投入した場合で
もガラス化皮膜は溶けるが酸化されないので緻密なＺｒ
８ｇ質の組成と特質をそのまま発揮できることになる。・Performance of glassy layer When treated at 1000℃ for 3 hours, the oxidation consumption rate of the ZrBz material body is less than 1%, the oxidized thickness is less than 100 u,
Softening point: 2,000°C or higher - Glassy layer thickness: 500-2,000μ Softening point: 1,200°C or higher 2. Composition that provides glassiness The ratio of both is 50 to 85% by weight of refractory powder and 50 to 15% by weight of vitrified material.Refractory powder is AIJ, powder, clay powder, etc.Vitrified material is plate glass powder, anhydrous borax, etc. A vitrified film is formed by coating the outer surface of the protective tube body in the form of a refractory powder and vitrified slurry, and heat-treating the same in an electric furnace at a temperature of 500°C or higher, preferably about 800 to 1200°C. It can be obtained with This vitrified film is preheated before being thrown into the molten metal to form a glass film that does not allow air to pass through, so the ZrBz protective tube will not be oxidized, and even if it is thrown into the molten metal, the vitrified film will melt but will not oxidize. Since it is not done, detailed Zr
This means that the composition and characteristics of 8g quality can be exhibited as they are.
また、このガラス化皮膜はＺｒＢａ質保護管が急熱急冷
された場合の熱衝撃性の緩和の役目も果たしている。更
にＺｒＢｇ質保護管は溶湯に濡れくい性能を有している
がこのガラス化皮膜の形成により溶湯浸漬中にスラグや
地金が適度につき引き上げ時の急冷による熱衝撃性の緩
和も計れることが認められている。即ち、このガラス皮
膜を形成することにより酸化を防止するとともに熱衝撃
性の緩和を計った割れにくく耐用の高い熱電対保護管を
提供するものである。Furthermore, this vitrified film also plays a role in alleviating thermal shock when the ZrBa protective tube is rapidly heated and cooled. Furthermore, the ZrBg protective tube has the ability to resist getting wet by molten metal, and it has been found that the formation of this vitrified film allows for a moderate amount of slag and metal to be absorbed during immersion in the molten metal, which can also help alleviate the thermal shock caused by rapid cooling during lifting. It is being That is, by forming this glass film, it is possible to provide a thermocouple protection tube that is resistant to breakage and has high durability, which prevents oxidation and alleviates thermal shock resistance.
［実施例］
Ｚｒ３ｇ粉末（１μ以下純度９９％以上）にＢＮ粉末（
１μ以下純度９９％以上） １０％添加し、ＳｉＣボー
ルでボットミルを用いエタノール溶媒を用い３日間粉砕
して取出し後スプレィドライヤーにて有機バインダーを
添加したものを造粒した。この粉末を用いてラバープレ
スにより２０口Ｏｋｇ／ｃｍ”で成形し、Ａ「雰囲気下
で２１００℃×３１「焼成し、内径１５φ、外径２５φ
、長さ８５０Ｉ２の保護管を製作した。（焼結体の分析
値ＺｒＢａ８５％、８８１０％、ＳｉＣ５％重量％）
又、ＺｒＢ１粉末（１μ以下純度９９％以上）をＳｉＣ
ボールを用いてボットミルでエタノール溶媒を用い３日
間粉砕し、同様にスプレィドライヤーに造粒粉末を作成
し、ラバープレス後常圧焼成して内径１５φ、外径２５
φ、長さ８５０Ｉ２の保護管を製作した。（焼結体の分
析値ＺｒＢａ９５％。[Example] BN powder (
1μ or less, purity 99% or more) was added thereto, pulverized for 3 days using an ethanol solvent using a Bot mill with SiC balls, taken out, and then granulated with an organic binder added using a spray dryer. This powder was molded with a rubber press to a size of 20 kg/cm, then fired at 2100°C x 31 cm in an A atmosphere, with an inner diameter of 15φ and an outer diameter of 25φ.
, a protection tube with a length of 850I2 was manufactured. (Analytical values of sintered body ZrBa 85%, 8810%, SiC 5% by weight) In addition, ZrB1 powder (1μ or less purity 99% or more) was
Using a ball, pulverize with ethanol solvent in a bot mill for 3 days, create granulated powder in the same way in a spray dryer, rubber press and then sinter under normal pressure to obtain 15mm inner diameter and 25mm outer diameter.
A protection tube with a diameter of 850I2 and a length of 850I2 was manufactured. (Analysis value of sintered body ZrBa95%.
ＳｉＣ５重量％）
酸化防止材は、ＡＩａＯ＊粉末６０（＋５０メツシユバ
ス）並板ガラス粉末２０％に結合材としての粘土１５％
、無水硼砂５％の調合に３％濃度ＰＶＡ溶液でボットミ
ルで３ｈｒ混合し泥漿を得た。この泥漿を保護管本体外
表面にスプレィまたははけ塗りあるいはテ゛イップにて
１ｍｍ厚さ強度のコーティングを施した。この保護管を
空気中÷乾燥後電気炉中で１０００℃×２ｈｒ熱処理し
保護管外表面に強固に密着したガラス質被覆を形成した
。(SiC 5% by weight) The antioxidant is AIaO* powder 60 (+50 mesh bath) lined glass powder 20% and clay as a binder 15%
A mixture of 5% anhydrous borax and a 3% PVA solution was mixed in a bot mill for 3 hours to obtain a slurry. This slurry was applied to the outer surface of the protective tube body by spraying, brushing, or using a tip to form a 1 mm thick coating. This protective tube was dried in air and then heat-treated in an electric furnace at 1000° C. for 2 hours to form a glassy coating that firmly adhered to the outer surface of the protective tube.
この保護管を４ＯＬｏｎのタンデイツシュ鍋で十分゛に
１０００℃程度まで予熱し、溶鋼中に浸漬し連続的に温
度測定を行なった。その結果７０ｃｈａｒｇｅ（Ｉｃｈ
、 ６０分）安定して測定ができ、Ｚｒ８ｇ保護管の外
面の侵食量は１．５〜２ｍｍ程度の軽微であった。同様
に酸化防止材を塗布し、なかった保護管を溶鋼に浸漬し
て使用したがその耐用は４０ｃｈと短く、侵食量は３ｍ
ｍ程度でこの侵食部分より折れやすくなっていた。This protective tube was sufficiently preheated to about 1000° C. in a 4OLon tundish pot, immersed in molten steel, and the temperature was continuously measured. As a result, 70 charge (Ich
, 60 minutes) Stable measurements were possible, and the amount of erosion on the outer surface of the Zr8g protection tube was slight, about 1.5 to 2 mm. Similarly, anti-oxidation material was applied and the protective tube that was not present was immersed in molten steel, but its service life was short at 40 channels, and the amount of erosion was 3 m.
It was easier to break than this eroded part at about m.
［発明の効果］
本発明は、各種溶融金属に対して高い耐食性、耐熱衝撃
性を有するＺｒ硼化物等の非酸化物系セラミックスを主
成分とする熱電対保護管等であり、測温中の予熱や輻射
によって保護管等が酸化されるのを防止したものであり
、より高い耐食性を保持し又浸漬、取出し時に起る耐熱
衝撃性を緩和した、安定に連続的に湯温を測温できるも
のであり、これを使用することによって省力化、測温調
製、成分調製等の製品の品質向上に役立ちその工業的価
値は多大である。[Effects of the Invention] The present invention provides a thermocouple protection tube, etc. mainly composed of non-oxide ceramics such as Zr boride, which has high corrosion resistance and thermal shock resistance against various molten metals, and This protects the protective tube from being oxidized by preheating or radiation, maintains higher corrosion resistance, reduces thermal shock resistance that occurs during immersion and removal, and can stably and continuously measure the water temperature. Its use can help save labor and improve the quality of products such as temperature measurement and ingredient preparation, and its industrial value is enormous.
第１図は、本発明の詳細な説明する一部を削除した縦断
面説明図である。
ｌは保護管、１ａは本体、ｌｂはガラス質層である。
猶ｌ 図FIG. 1 is a longitudinal cross-sectional explanatory view with some parts removed to explain the present invention in detail. 1 is a protective tube, 1a is a main body, and lb is a vitreous layer. figure
Claims (1)
系セラミックス製熱電対保護管。（２）耐火粉末および
ガラス化物を主成分とする被覆層を外表面に形成してな
る非酸化物系熱電対保護管。 （３）非酸化物系セラミックスがＺｒの硼化物を主成分
とするものである請求項１又は２記載の保護管。 （４）非酸化物系セラミックス保護管の外表面に耐火粉
末とガラス化物を主成分とする被覆を施し、５００℃以
上で熱処理することにより外表面にガラス質層を形成せ
しめることを特徴とする非酸化物セラミックス製保護管
の製造方法。[Claims] (1) A thermocouple protection tube made of non-oxide ceramics and having a glassy layer formed on its outer surface. (2) A non-oxide thermocouple protection tube formed by forming a coating layer mainly composed of refractory powder and vitrified material on the outer surface. (3) The protective tube according to claim 1 or 2, wherein the non-oxide ceramic contains Zr boride as a main component. (4) A coating mainly composed of refractory powder and vitrified material is applied to the outer surface of the non-oxide ceramic protective tube, and a vitreous layer is formed on the outer surface by heat treatment at 500°C or higher. A method for manufacturing a protection tube made of non-oxide ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11897488A JP2572630B2 (en) | 1988-05-16 | 1988-05-16 | Thermocouple protection tube and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11897488A JP2572630B2 (en) | 1988-05-16 | 1988-05-16 | Thermocouple protection tube and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01288740A true JPH01288740A (en) | 1989-11-21 |
| JP2572630B2 JP2572630B2 (en) | 1997-01-16 |
Family
ID=14749887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11897488A Expired - Lifetime JP2572630B2 (en) | 1988-05-16 | 1988-05-16 | Thermocouple protection tube and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2572630B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0484722A (en) * | 1990-07-27 | 1992-03-18 | Ngk Insulators Ltd | Temperature measuring device for nonmetallic inorganic member, manufacture thereof and heating device utilizing temperature measuring device |
| JPH0484723A (en) * | 1990-07-27 | 1992-03-18 | Ngk Insulators Ltd | Temperature measuring device for nonmetallic inorganic member and heating device utilizing temperature measuring device |
| JPH0495832A (en) * | 1990-08-14 | 1992-03-27 | Ngk Insulators Ltd | Measuring apparatus of temperature of non-metallic inorganic member, its manufacture and heating apparatus using the manufacture |
| US5181779A (en) * | 1989-11-22 | 1993-01-26 | Nippon Steel Corporation | Thermocouple temperature sensor and a method of measuring the temperature of molten iron |
| DE19840198A1 (en) * | 1998-04-20 | 1999-10-21 | Rosemount Inc | Temperature probe in fluid with sapphire sensor for processing fluids, especially oil evaporation installations |
-
1988
- 1988-05-16 JP JP11897488A patent/JP2572630B2/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5181779A (en) * | 1989-11-22 | 1993-01-26 | Nippon Steel Corporation | Thermocouple temperature sensor and a method of measuring the temperature of molten iron |
| JPH0484722A (en) * | 1990-07-27 | 1992-03-18 | Ngk Insulators Ltd | Temperature measuring device for nonmetallic inorganic member, manufacture thereof and heating device utilizing temperature measuring device |
| JPH0484723A (en) * | 1990-07-27 | 1992-03-18 | Ngk Insulators Ltd | Temperature measuring device for nonmetallic inorganic member and heating device utilizing temperature measuring device |
| JPH07104212B2 (en) * | 1990-07-27 | 1995-11-13 | 日本碍子株式会社 | Heating device and manufacturing method thereof |
| JPH07104213B2 (en) * | 1990-07-27 | 1995-11-13 | 日本碍子株式会社 | Heating device |
| JPH0495832A (en) * | 1990-08-14 | 1992-03-27 | Ngk Insulators Ltd | Measuring apparatus of temperature of non-metallic inorganic member, its manufacture and heating apparatus using the manufacture |
| JPH07104215B2 (en) * | 1990-08-14 | 1995-11-13 | 日本碍子株式会社 | Heating device and manufacturing method thereof |
| DE19840198A1 (en) * | 1998-04-20 | 1999-10-21 | Rosemount Inc | Temperature probe in fluid with sapphire sensor for processing fluids, especially oil evaporation installations |
| US6059453A (en) * | 1998-04-20 | 2000-05-09 | Rosemount Inc. | Temperature probe with sapphire thermowell |
| DE19840198B4 (en) * | 1998-04-20 | 2007-09-13 | Rosemount Inc., Eden Prairie | Temperature probe with sapphire temperature gauge |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2572630B2 (en) | 1997-01-16 |
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