JPH10292229A - Inorganic fiber product - Google Patents

Inorganic fiber product

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Publication number
JPH10292229A
JPH10292229A JP9111742A JP11174297A JPH10292229A JP H10292229 A JPH10292229 A JP H10292229A JP 9111742 A JP9111742 A JP 9111742A JP 11174297 A JP11174297 A JP 11174297A JP H10292229 A JPH10292229 A JP H10292229A
Authority
JP
Japan
Prior art keywords
alumina
ppm
less
fiber
silica
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
Application number
JP9111742A
Other languages
Japanese (ja)
Inventor
Yasuo Misu
安雄 三須
Motohiko Ezawa
元彦 江沢
Hiroyuki Terada
浩之 寺田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain TM KK
Original Assignee
Toshiba Monofrax Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Monofrax Co Ltd filed Critical Toshiba Monofrax Co Ltd
Priority to JP9111742A priority Critical patent/JPH10292229A/en
Publication of JPH10292229A publication Critical patent/JPH10292229A/en
Pending legal-status Critical Current

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    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/62227—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining fibres
    • C04B35/62231—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining fibres based on oxide ceramics
    • C04B35/6224—Fibres based on silica
    • C04B35/62245—Fibres based on silica rich in aluminium oxide
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    • C04B35/10—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 aluminium oxide
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    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/6303—Inorganic additives
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Composite Materials (AREA)
  • Silicon Compounds (AREA)
  • Inorganic Fibers (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a highly pure inorganic fiber product capable of inhibiting the thermal crystallization of the fiber, improved in heat resistance, extremely little in the generation of powder dust and little in contaminative reactivity with a material to be heated. SOLUTION: This inorganic fiber product contains alumina silica fibers and alumina fibers as main components, if necessary, contains either one or more kinds of organic binders and inorganic binders, and further contains Na and K in a total amount of <=400 ppm, <=130 ppm of Ca and <=200 ppm of Fe.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、不純物の少ないア
ルミナ繊維とアルミナシリカ繊維を主成分とする無機繊
維製品に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inorganic fiber product mainly composed of alumina fiber and alumina-silica fiber having less impurities.

【０００２】[0002]

【従来の技術】アルミナ繊維は、一般に、Ａｌ2 Ｏ3 の
含有率が７０重量％以上であり、アルミナとシリカを主
成分とする直径約２〜４μｍ、最大長さ１００ｍｍ程度
の短繊維である。 2. Description of the Related Art Alumina fibers are generally short fibers having a content of Al 2 O 3 of 70% by weight or more, and having a diameter of about 2 to 4 μm and a maximum length of about 100 mm mainly containing alumina and silica. .

【０００３】アルミナ繊維は、アルミナの含有率によ
り、ムライトのみ、ムライトとコランダムの混合、また
はコランダムのみの多結晶体である。そのため、加熱に
より新たな結晶の析出がなく、繊維の劣化が少なくて、
１５００℃付近にも使用できる。しかし、高価であるの
で、単独で使用されることは少ない。安価なアルミナシ
リカ繊維と共に使用されることが多い。[0003] Alumina fibers are polycrystals of only mullite, a mixture of mullite and corundum, or only corundum, depending on the alumina content. Therefore, there is no precipitation of new crystals by heating, and there is little deterioration of the fiber,
It can be used at around 1500 ° C. However, since it is expensive, it is rarely used alone. Often used with inexpensive alumina silica fibers.

【０００４】アルミナシリカ繊維は、Ａｌ2 Ｏ3 の含有
率が４０〜６５重量％であり、アルミナとシリカを主成
分とする直径約２〜４μｍ、最大長さ２５０ｍｍ程度の
非晶質の短繊維で、耐熱温度が１０００℃以上である。
アルミナシリカ繊維はこの特性により、補強繊維として
用いられたり、ブランケットやボード、練物などの不定
形の製品に加工されて、各種の工業炉に広く使用され
る。しかし、非晶質であるアルミナシリカ繊維は、１０
００℃程度に加熱されると、ムライトの結晶を析出し始
め、１１００℃以上ではクリストバライトの結晶を析出
する。Alumina-silica fibers have an Al 2 O 3 content of 40 to 65% by weight, and are amorphous short fibers having a diameter of about 2 to 4 μm and a maximum length of about 250 mm, which are mainly composed of alumina and silica. And the heat-resistant temperature is 1000 ° C. or higher.
Alumina-silica fibers are widely used in various industrial furnaces because of their properties, they are used as reinforcing fibers or are processed into amorphous products such as blankets, boards and kneaded materials. However, amorphous alumina silica fibers are 10
When heated to about 00 ° C., mullite crystals begin to precipitate, and at 1100 ° C. or higher, cristobalite crystals precipitate.

【０００５】ムライトは、熱に安定であり、繊維の耐熱
性を向上する。一方、クリストバライトは、２００〜３
００℃の温度域で、熱膨張率が急激に変化する。そのた
め、クリストバライトが多い繊維は、加熱あるいは冷却
による劣化が大きい。繊維の劣化が進行すると強度や耐
熱性が低下したり、また繊維が粉塵となって、炉内の被
加熱物を汚染する等の不具合がある。[0005] Mullite is heat stable and improves the heat resistance of the fibers. On the other hand, Cristobalite is 200-3
In the temperature range of 00 ° C., the coefficient of thermal expansion changes rapidly. Therefore, a fiber with a large amount of cristobalite is greatly deteriorated by heating or cooling. As the fiber deteriorates, the strength and heat resistance are reduced, and the fiber becomes dust and contaminates the heating target in the furnace.

【０００６】かかる不具合に対処するため、不純物を少
なくすることが試みられている。In order to cope with such a problem, attempts have been made to reduce impurities.

【０００７】例えば、アルミナシリカ繊維としては、Ｎ
ａとＫの合計が２５０ｐｐｍ以下、又はこれに加え、更
にＦｅが５００ｐｐｍ以下である繊維が知られている
（特開平４−１０８１１５号公報参照）。For example, as the alumina silica fiber, N
Fibers in which the sum of a and K is 250 ppm or less, or additionally, Fe is 500 ppm or less are known (see JP-A-4-108115).

【０００８】また、ＮａとＫの合計が２０００ｐｐｍ以
下であり、Ｆｅが５００ｐｐｍ以下であり、Ｃｕが５０
ｐｐｍ以下であり、Ｎｉが５０ｐｐｍ以下である無機繊
維積層体も知られている（特開平５−２１５４７３号公
報参照）。The total of Na and K is 2,000 ppm or less, Fe is 500 ppm or less, and Cu is 50 ppm or less.
There is also known an inorganic fiber laminate in which the content is less than 50 ppm and the content of Ni is less than 50 ppm (see Japanese Patent Application Laid-Open No. Hei 5-215473).

【０００９】[0009]

【発明が解決しようとする課題】最近は、一部で工業製
品の高品質化が著しく進み、工業炉においても汚染を完
全に防止することが望まれている。Recently, the quality of industrial products has been remarkably improved in some parts, and it is desired to completely prevent contamination in industrial furnaces.

【００１０】特開平４−１０８１１５号公報のアルミナ
シリカ繊維や特開平５−２１５４７３号公報の無機繊維
積層体では、それらに含まれる不純物を少なくし、不純
物による汚染防止にある程度成功している。しかし、不
純物の影響を十分に小さくできずに、被加熱物の汚染を
満足に防止することができなかった。In the alumina silica fiber disclosed in JP-A-4-108115 and the inorganic fiber laminate described in JP-A-5-215473, impurities contained therein are reduced, and the contamination by the impurities has been successfully prevented to some extent. However, the influence of impurities cannot be sufficiently reduced, and the contamination of the object to be heated cannot be satisfactorily prevented.

【００１１】本発明は、被加熱物を汚染しない高純度の
無機繊維製品を提供することを目的としている。It is an object of the present invention to provide a high-purity inorganic fiber product which does not contaminate a heated object.

【００１２】[0012]

【課題を解決するための手段】本願の第１発明は、アル
ミナシリカ繊維と、アルミナ繊維を主成分とし、必要に
応じて耐火粉末と、有機バインダーおよび無機バインダ
ーのいずれか１種以上を含み、ＮａとＫの合計が５００
ｐｐｍ以下であり、Ｃａが１３０ｐｐｍ以下であり、Ｆ
ｅが２００ｐｐｍ以下である無機繊維製品を要旨として
いる。According to a first aspect of the present invention, an alumina-silica fiber and an alumina fiber are contained as main components, and if necessary, a refractory powder and at least one of an organic binder and an inorganic binder, The sum of Na and K is 500
ppm or less, Ca is 130 ppm or less, and F
The gist is an inorganic fiber product having e of 200 ppm or less.

【００１３】本願の第２発明は、アルミナシリカ繊維
と、アルミナ繊維を主成分とし、必要に応じて耐火粉末
と、有機バインダーおよび無機バインダーのいずれか１
種以上を含み、ＮａとＫの合計が５００ｐｐｍ以下であ
り、Ｃａが１３０ｐｐｍ以下であり、Ｆｅが２００ｐｐ
ｍ以下であり、Ｃｕが２ｐｐｍ以下であり、Ｎｉが４ｐ
ｐｍ以下である無機繊維製品を要旨としている。[0013] The second invention of the present application is based on an alumina silica fiber, an alumina fiber as a main component, and if necessary, a refractory powder and one of an organic binder and an inorganic binder.
Species, the total of Na and K is 500 ppm or less, the content of Ca is 130 ppm or less, and the content of Fe is 200 pp.
m or less, Cu is 2 ppm or less, and Ni is 4 p
The gist of the present invention is an inorganic fiber product that is not more than pm.

【００１４】本願の第３発明においては、アルミナシリ
カ繊維は、ＮａとＫの合計が１５０ｐｐｍ以下であり、
Ｃａが１００ｐｐｍ以下であり、Ｆｅが１００ｐｐｍ以
下であり、Ｃｕが１．５ｐｐｍ以下であり、Ｎｉが２ｐ
ｐｍ以下である。In the third invention of the present application, the alumina silica fiber has a total of Na and K of 150 ppm or less,
Ca is 100 ppm or less, Fe is 100 ppm or less, Cu is 1.5 ppm or less, and Ni is 2 p
pm or less.

【００１５】[0015]

【発明の実施の形態】本発明者らは、アルミナシリカ繊
維の加熱に伴うクリストバライトの析出が、主にＣａ、
Ｃｕ、Ｎｉ、更にＮａ、Ｋ、Ｆｅなどの不純物に起因す
ることを知見して本発明をなしたものである。BEST MODE FOR CARRYING OUT THE INVENTION The present inventors have found that the precipitation of cristobalite accompanying the heating of alumina silica fibers is mainly caused by Ca,
The present invention has been made based on the finding that it is caused by impurities such as Cu, Ni, and Na, K, and Fe.

【００１６】アルミナシリカ繊維に含まれるＣａは、Ｎ
ａやＫなどのアルカリ金属元素と同様にシリカ部分の融
点を低下させ、クリストバライトの結晶化を著しく促進
させる。Ca contained in the alumina silica fiber is N
Like the alkali metal elements such as a and K, it lowers the melting point of the silica portion and remarkably promotes the crystallization of cristobalite.

【００１７】また、アルミナシリカ繊維に含まれるＣｕ
と、Ｎｉの挙動については、明確に解明できていない
が、ＣｕやＮｉはアルミナシリカ繊維のシリカ中を拡散
移動して繊維表面に濃縮してクリストバライトの析出が
局部的に促進されるものと推定される。Further, Cu contained in the alumina silica fiber
Although the behavior of Ni has not been clearly elucidated, it is presumed that Cu and Ni diffuse and move in the silica of the alumina silica fiber and concentrate on the fiber surface, and the precipitation of cristobalite is locally promoted. Is done.

【００１８】無機繊維製品の製造に際して、使用する
水、耐火粉末、有機バインダーや無機バインダーなど
は、繊維の表面或いは交点に凝集しやすいので、限定し
て使用することが好ましい。In the production of inorganic fiber products, water, refractory powder, organic binders, inorganic binders and the like used are liable to agglomerate on the surface or intersections of the fibers, so it is preferable to use them in a limited manner.

【００１９】例えば、水はイオン交換水或いは蒸留水を
使用すると、無機繊維製品に含まれるＮａ、Ｆｅ、Ｃ
ａ、Ｋ、Ｍｇなどの不純物が減少して好ましい。For example, when ion-exchanged water or distilled water is used as the water, Na, Fe, C contained in the inorganic fiber product is used.
It is preferable because impurities such as a, K, and Mg are reduced.

【００２０】耐火粉末は、アルミナ粉やムライト粉が好
ましい。これらの耐火粉末においても、アルコキシドを
原料とする高純度品や、アルカリの含有量を抑えた低ソ
ーダ品が好ましい。The refractory powder is preferably alumina powder or mullite powder. Among these refractory powders, a high-purity product using an alkoxide as a raw material and a low-soda product having a reduced alkali content are preferable.

【００２１】無機バインダーは、Ｎａ含有量の少ない低
ソーダのコロイダルシリカやアルミナゾル、気相法で作
られた高純度の微粒シリカ（例えば商品名アエロジル）
などが好ましい。これらの１種又は２種を同時に使用し
ても良い。Examples of the inorganic binder include low-sodium colloidal silica and alumina sol having a low Na content, and high-purity fine-grained silica prepared by a gas phase method (for example, Aerosil).
Are preferred. One or two of these may be used simultaneously.

【００２２】有機バインダーは、Ｎａなどのアルカリ金
属元素や他の不純物の少ない高純度の澱粉やアクリルや
セルロースなどが好ましい。The organic binder is preferably an alkali metal element such as Na or a high-purity starch, acryl or cellulose containing few other impurities.

【００２３】アルミナシリカ繊維とアルミナ繊維と耐火
粉末と無機バインダーの配合構成は、次の重量比が好ま
しい。The following weight ratio is preferred for the composition of the alumina silica fiber, the alumina fiber, the refractory powder and the inorganic binder.

【００２４】アルミナシリカ繊維とアルミナ繊維の重量
比は１００：０〜１００：１００であり、繊維と耐火粉
末の重量比は１００：０〜１００：１００であり、繊維
と耐火粉末の合計と無機バインダーの重量比は１００：
０〜８０：２０である。The weight ratio between the alumina silica fiber and the alumina fiber is 100: 0 to 100: 100, the weight ratio between the fiber and the refractory powder is 100: 0 to 100: 100, and the total of the fiber and the refractory powder and the inorganic binder Is 100:
0 to 80:20.

【００２５】次に、本発明の無機繊維製品が含有する不
純物について説明する。Next, the impurities contained in the inorganic fiber product of the present invention will be described.

【００２６】ＮａとＫの合計は５００ｐｐｍ以下が好ま
しく、Ｆｅは２００ｐｐｍ以下が好ましく、Ｃａは１３
０ｐｐｍ以下が好ましく、Ｃｕは２ｐｐｍ以下が好まし
く、Ｎｉは４ｐｐｍ以下が好ましい。これらの値を越え
ると、いずれも、使用の際に、発生する粉塵が多くなっ
て、被加熱物を汚染する。The total of Na and K is preferably 500 ppm or less, Fe is preferably 200 ppm or less, and Ca is 13 ppm or less.
0 ppm or less is preferable, Cu is preferably 2 ppm or less, and Ni is preferably 4 ppm or less. When these values are exceeded, the dust generated during use increases the contamination of the object to be heated.

【００２７】本発明のアルミナシリカ繊維が含有する不
純物については、ＮａとＫの合計は１５０ｐｐｍ以下が
好ましく、Ｆｅは１００ｐｐｍ以下が好ましく、Ｃａは
１００ｐｐｍ以下が好ましく、Ｃｕは１．５ｐｐｍ以下
が好ましく、Ｎｉは２ｐｐｍ以下が好ましい。これらの
値を越えると、いずれも、使用の際に、発生する粉塵が
多くなって、被加熱物を汚染する。Regarding the impurities contained in the alumina silica fiber of the present invention, the total of Na and K is preferably 150 ppm or less, Fe is preferably 100 ppm or less, Ca is preferably 100 ppm or less, Cu is preferably 1.5 ppm or less, Ni is preferably 2 ppm or less. When these values are exceeded, the dust generated during use increases the contamination of the object to be heated.

【００２８】アルミナシリカ繊維は、１０００℃〜１１
００℃に加熱してムライト結晶を析出させると耐熱性、
および耐久性が一層向上して好ましい。Alumina-silica fiber is used at 1000 ° C. to 11 ° C.
When heated to 00 ° C to precipitate mullite crystals, heat resistance,
Further, the durability is further improved, which is preferable.

【００２９】繊維に含まれるショットは、落下しやすい
ので、被加熱物の汚染を防止するために、処理をしてシ
ョットを少なくするのが好ましい。Since the shots contained in the fibers are easy to fall, it is preferable to reduce the number of shots by performing treatment in order to prevent contamination of the object to be heated.

【００３０】無機繊維製品は、その表面に、例えば、ア
ルミナゾル、アルミニウムのアルコキシド溶液などの高
純度のアルミナ系バインダー、または例えばコロイダル
シリカとアルミナゾルを混合した、高純度のムライト系
バインダーさらに低ソーダのコロイダルシリカなどのシ
リカ系バインダーを塗布すると、更に粉塵を防止でき
て、一層好ましい。The inorganic fiber product has, on its surface, a high-purity alumina-based binder such as alumina sol or an aluminum alkoxide solution, or a high-purity mullite-based binder obtained by mixing, for example, colloidal silica and alumina sol, and a low-soda colloid. It is more preferable to apply a silica-based binder such as silica because dust can be further prevented.

【００３１】有機バインダーを嫌う炉などに無機繊維製
品を使用する場合は、予め８００〜１６００℃で熱処理
すると、有機バインダーを除去できて好ましい。熱処理
の温度が８００℃未満ではそのような処理をするのに長
時間を要し、１６００℃を越えると、製品の強度が低下
する。When an inorganic fiber product is used in a furnace that dislikes an organic binder, a heat treatment at 800 to 1600 ° C. is preferable because the organic binder can be removed. When the temperature of the heat treatment is lower than 800 ° C., it takes a long time to perform such treatment, and when it exceeds 1600 ° C., the strength of the product is reduced.

【００３２】[0032]

【実施例】アルミナシリカ繊維、アルミナ繊維およびア
ルミナ粉を所定量計量し、これらの繊維とアルミナ粉の
合計量で１ｋｇを水１００リットルに混合分散した。そ
の後、陽性澱粉と低ソーダのコロイダルシリカをそれぞ
れ固形分で６０ｇ添加してスラリーを作り、真空成形法
により厚さ２０ｍｍの成形品を製作した。EXAMPLE A predetermined amount of alumina silica fiber, alumina fiber and alumina powder was weighed, and 1 kg of these fibers and alumina powder were mixed and dispersed in 100 liters of water. Thereafter, positive starch and low-soda colloidal silica were each added at a solid content of 60 g to form a slurry, and a molded product having a thickness of 20 mm was produced by a vacuum molding method.

【００３３】アルミナシリカ繊維の不純物の分析値を表
１に示し、アルミナ繊維の不純物の分析値を表２に示
し、アルミナ粉の不純物の分析値を表３に示す。The analytical values of the impurities in the alumina silica fiber are shown in Table 1, the analytical values of the impurities in the alumina fiber are shown in Table 2, and the analytical values of the impurities in the alumina powder are shown in Table 3.

【００３４】アルミナシリカ繊維は、ほぼアルミナが５
３重量％、シリカが４７重量％である。アルミナ繊維
は、ほぼアルミナが７２重量％、シリカが２８重量％で
ある。Alumina-silica fibers have almost 5 alumina.
3% by weight and 47% by weight of silica. The alumina fibers are approximately 72% by weight of alumina and 28% by weight of silica.

【００３５】成形品の構成と不純物の分析値を表４に示
し、その特性値を表５に示す。Table 4 shows the composition of the molded article and the analytical values of impurities. Table 5 shows the characteristic values.

【００３６】実施例２は、成形品を１２００℃で１時間
加熱処理したものである。実施例３では、１０００℃で
１５分間加熱処理をしたアルミナシリカ繊維を使用し
て、成形後に高純度のアルミナゾルを成形品の表面に塗
布した。実施例４においては、１０００℃で１５分間加
熱処理をしたアルミナシリカ繊維をアルミナシリカ繊維
全体の７０％使用し、アルミナ粉は高純度品を使用し、
成形品を１４００℃で３時間加熱処理した。 特性値の
試験方法を説明する。In Example 2, a molded article was subjected to heat treatment at 1200 ° C. for 1 hour. In Example 3, after molding, high-purity alumina sol was applied to the surface of the molded article using alumina silica fiber that had been heat-treated at 1000 ° C. for 15 minutes. In Example 4, alumina silica fiber that was heat-treated at 1000 ° C. for 15 minutes was used in 70% of the entire alumina silica fiber, and alumina powder used was a high-purity product.
The molded article was heat-treated at 1400 ° C. for 3 hours. A method for testing characteristic values will be described.

【００３７】粉塵発生量は、アルミナ板を置き、このア
ルミナ板上の４隅に高さ２０ｍｍの支えを置き、その支
えの上に１５０ｍｍ角の成形品を置いて、１４００℃−
８時間加熱を５回繰り返し、アルミナ板に落下した繊維
の数を数えた。The amount of dust generation was determined by placing an alumina plate, placing supports having a height of 20 mm at the four corners on the alumina plate, and placing a 150 mm square molded product on the supports at 1400 ° C.
Heating was repeated 5 times for 8 hours, and the number of fibers dropped on the alumina plate was counted.

【００３８】汚染反応性は、細かく粉砕した成形品０．
３ｇを石英ガラス板の上に約３０ｍｍ角に置いて、１３
００℃で６時間加熱し、石英ガラスの失透を観察した。
失透の程度により、無、微少、少、中、大の５段階に分
けて評価した。失透の程度が大の状態では、石英ガラス
に無数の泡状物が観察された。The contamination reactivity was measured using a finely ground molded article.
3g is placed on a quartz glass plate at about 30mm square.
After heating at 00 ° C. for 6 hours, devitrification of the quartz glass was observed.
According to the degree of devitrification, evaluation was made in five stages: none, minute, small, medium, and large. When the degree of devitrification was large, countless bubbles were observed in the quartz glass.

【００３９】前述実施例１〜２と同様に比較例を作製し
た。Comparative examples were prepared in the same manner as in Examples 1 and 2.

【００４０】比較例１はＣｕが多い例である。比較例２
はＮｉが多い例である。比較例３は、Ｃａが多い例であ
る。比較例５では、通常品のアルミナ粉を使用した。比
較例４および５は、Ｎａ、Ｋ、Ｆｅ、Ｃａ、Ｃｕ、Ｎｉ
が多い例であり、粉塵発生量および汚染が多い。Comparative Example 1 is an example in which the amount of Cu is large. Comparative Example 2
Is an example of a large amount of Ni. Comparative Example 3 is an example in which Ca is large. In Comparative Example 5, normal alumina powder was used. Comparative Examples 4 and 5 are Na, K, Fe, Ca, Cu, Ni
And the amount of dust generation and contamination are high.

【００４１】実施例２と比較例４の成形品を１４００℃
で１０００時間加熱した後、アルミナシリカ繊維の表面
状態をＳＥＭにより観察した。その結果を、図１と図２
に示す。図１と図２を比較すると、図１では、図２のも
のよりも結晶成長が抑制されている。The molded articles of Example 2 and Comparative Example 4 were heated at 1400 ° C.
, And the surface state of the alumina silica fiber was observed by SEM. The results are shown in FIG. 1 and FIG.
Shown in When FIG. 1 is compared with FIG. 2, crystal growth is suppressed in FIG. 1 more than in FIG.

【００４２】[0042]

【発明の効果】本発明の無機繊維製品によると、加熱に
よる繊維の結晶化を抑制できて、耐熱性が向上し、粉塵
の発生が極めて少なく、被加熱物との汚染反応性も少な
い。この理由により、本発明の無機繊維製品を使用すれ
ば、被加熱物を汚染することがなく、被加熱物の品質お
よび生産量の向上が可能になる。According to the inorganic fiber product of the present invention, crystallization of the fiber by heating can be suppressed, heat resistance is improved, generation of dust is extremely small, and contamination reactivity with an object to be heated is small. For this reason, if the inorganic fiber product of the present invention is used, the quality of the object to be heated and the production amount can be improved without contaminating the object to be heated.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明のアルミナシリカ繊維のＳＥＭ観察結果
を示す図。FIG. 1 is a view showing the results of SEM observation of the alumina silica fiber of the present invention.

【図２】比較例のアルミナシリカ繊維のＳＥＭ観察結果
を示す図。FIG. 2 is a view showing the results of SEM observation of alumina silica fibers of a comparative example.

【表１】 [Table 1]

【表２】 [Table 2]

【表３】 [Table 3]

【表４】 [Table 4]

【表５】 [Table 5]

─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成９年５月７日[Submission date] May 7, 1997

【手続補正１】[Procedure amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】全文[Correction target item name] Full text

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【書類名】 明細書[Document Name] Statement

【発明の名称】 無機繊維製品[Title of the Invention] Inorganic fiber products

【特許請求の範囲】[Claims]

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、不純物の少ないア
ルミナ繊維とアルミナシリカ繊維を主成分とする無機繊
維製品に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inorganic fiber product mainly composed of alumina fiber and alumina-silica fiber having less impurities.

【０００２】[0002]

【従来の技術】アルミナ繊維は、一般に、Ａｌ２Ｏ３の
含有率が７０重量％以上であり、アルミナとシリカを主
成分とする直径約２〜４μｍ、最大長さ１００ｍｍ程度
の短繊維である。 2. Description of the Related Art Alumina fibers are generally short fibers having a content of Al 2 O 3 of 70% by weight or more, and having a diameter of about 2 to 4 μm and a maximum length of about 100 mm, mainly containing alumina and silica. .

【０００３】アルミナ繊維は、アルミナの含有率によ
り、ムライトのみ、ムライトとコランダムの混合、また
はコランダムのみの多結晶体である。そのため、加熱に
より新たな結晶の析出がなく、繊維の劣化が少なくて、
１５００℃付近にも使用できる。しかし、高価であるの
で、単独で使用されることは少ない。安価なアルミナシ
リカ繊維と共に使用されることが多い。[0003] Alumina fibers are polycrystals of only mullite, a mixture of mullite and corundum, or only corundum, depending on the alumina content. Therefore, there is no precipitation of new crystals by heating, and there is little deterioration of the fiber,
It can be used at around 1500 ° C. However, since it is expensive, it is rarely used alone. Often used with inexpensive alumina silica fibers.

【０００４】アルミナシリカ繊維は、Ａｌ２Ｏ３の含有
率が４０〜６５重量％であり、アルミナとシリカを主成
分とする直径約２〜４μｍ、最大長さ２５０ｍｍ程度の
非晶質の短繊維で、耐熱温度が１０００℃以上である。
アルミナシリカ繊維はこの特性により、補強繊維として
用いられたり、ブランケットやボード、練物などの不定
形の製品に加工されて、各種の工業炉に広く使用され
る。しかし、非晶質であるアルミナシリカ繊維は、１０
００℃程度に加熱されると、ムライトの結晶を析出し始
め、１１００℃以上ではクリストバライトの結晶を析出
する。Alumina-silica fibers have an Al 2 O 3 content of 40 to 65% by weight, and are amorphous short fibers having a diameter of about 2 to 4 μm and a maximum length of about 250 mm and containing alumina and silica as main components. And the heat-resistant temperature is 1000 ° C. or higher.
Alumina-silica fibers are widely used in various industrial furnaces because of their properties, they are used as reinforcing fibers or are processed into amorphous products such as blankets, boards and kneaded materials. However, amorphous alumina silica fibers are 10
When heated to about 00 ° C., mullite crystals begin to precipitate, and at 1100 ° C. or higher, cristobalite crystals precipitate.

【０００５】ムライトは、熱に安定であり、繊維の耐熱
性を向上する。一方、クリストバライトは、２００〜３
００℃の温度域で、熱膨張率が急激に変化する。そのた
め、クリストバライトが多い繊維は、加熱あるいは冷却
による劣化が大きい。繊維の劣化が進行すると強度や耐
熱性が低下したり、また繊維が粉塵となって、炉内の被
加熱物を汚染する等の不具合がある。[0005] Mullite is heat stable and improves the heat resistance of the fibers. On the other hand, Cristobalite is 200-3
In the temperature range of 00 ° C., the coefficient of thermal expansion changes rapidly. Therefore, a fiber with a large amount of cristobalite is greatly deteriorated by heating or cooling. As the fiber deteriorates, the strength and heat resistance are reduced, and the fiber becomes dust and contaminates the heating target in the furnace.

【０００６】かかる不具合に対処するため、不純物を少
なくすることが試みられている。In order to cope with such a problem, attempts have been made to reduce impurities.

【０００７】例えば、アルミナシリカ繊維としては、Ｎ
ａとＫの合計が２５０ｐｐｍ以下、又はこれに加え、更
にＦｅが５００ｐｐｍ以下である繊維が知られている
（特開平４−１０８１１５号公報参照）。For example, as the alumina silica fiber, N
Fibers in which the sum of a and K is 250 ppm or less, or additionally, Fe is 500 ppm or less are known (see JP-A-4-108115).

【０００８】また、ＮａとＫの合計が２０００ｐｐｍ以
下であり、Ｆｅが５００ｐｐｍ以下であり、Ｃｕが５０
ｐｐｍ以下であり、Ｎｉが５０ｐｐｍ以下である無機繊
維積層体も知られている（特開平５−２１５４７３号公
報参照）。The total of Na and K is 2,000 ppm or less, Fe is 500 ppm or less, and Cu is 50 ppm or less.
There is also known an inorganic fiber laminate in which the content is less than 50 ppm and the content of Ni is less than 50 ppm (see Japanese Patent Application Laid-Open No. Hei 5-215473).

【０００９】[0009]

【発明が解決しようとする課題】最近は、一部で工業製
品の高品質化が著しく進み、工業炉においても汚染を完
全に防止することが望まれている。Recently, the quality of industrial products has been remarkably improved in some parts, and it is desired to completely prevent contamination in industrial furnaces.

【００１０】特開平４−１０８１１５号公報のアルミナ
シリカ繊維や特開平５−２１５４７３号公報の無機繊維
積層体では、それらに含まれる不純物を少なくし、不純
物による汚染防止にある程度成功している。しかし、不
純物の影響を十分に小さくできずに、被加熱物の汚染を
満足に防止することができなかった。In the alumina silica fiber disclosed in JP-A-4-108115 and the inorganic fiber laminate described in JP-A-5-215473, impurities contained therein are reduced, and the contamination by the impurities has been successfully prevented to some extent. However, the influence of impurities cannot be sufficiently reduced, and the contamination of the object to be heated cannot be satisfactorily prevented.

【００１１】本発明は、被加熱物を汚染しない高純度の
無機繊維製品を提供することを目的としている。It is an object of the present invention to provide a high-purity inorganic fiber product which does not contaminate a heated object.

【００１２】[0012]

【課題を解決するための手段】本願の第１発明は、アル
ミナシリカ繊維と、アルミナ繊維を主成分とし、必要に
応じて耐火粉末と、有機バインダーおよび無機バインダ
ーのいずれか１種以上を含み、ＮａとＫの合計が５００
ｐｐｍ以下であり、Ｃａが１３０ｐｐｍ以下であり、Ｆ
ｅが２００ｐｐｍ以下である無機繊維製品を要旨として
いる。According to a first aspect of the present invention, an alumina-silica fiber and an alumina fiber are contained as main components, and if necessary, a refractory powder and at least one of an organic binder and an inorganic binder, The sum of Na and K is 500
ppm or less, Ca is 130 ppm or less, and F
The gist is an inorganic fiber product having e of 200 ppm or less.

【００１３】本願の第２発明は、アルミナシリカ繊維
と、アルミナ繊維を主成分とし、必要に応じて耐火粉末
と、有機バインダーおよび無機バインダーのいずれか１
種以上を含み、ＮａとＫの合計が５００ｐｐｍ以下であ
り、Ｃａが１３０ｐｐｍ以下であり、Ｆｅが２００ｐｐ
ｍ以下であり、Ｃｕが２ｐｐｍ以下であり、Ｎｉが４ｐ
ｐｍ以下である無機繊維製品を要旨としている。[0013] The second invention of the present application is based on an alumina silica fiber, an alumina fiber as a main component, and if necessary, a refractory powder and one of an organic binder and an inorganic binder.
Species, the total of Na and K is 500 ppm or less, the content of Ca is 130 ppm or less, and the content of Fe is 200 pp.
m or less, Cu is 2 ppm or less, and Ni is 4 p
The gist of the present invention is an inorganic fiber product that is not more than pm.

【００１４】本願の第３発明においては、アルミナシリ
カ繊維は、ＮａとＫの合計が１５０ｐｐｍ以下であり、
Ｃａが１００ｐｐｍ以下であり、Ｆｅが１００ｐｐｍ以
下であり、Ｃｕが１．５ｐｐｍ以下であり、Ｎｉが２ｐ
ｐｍ以下である。In the third invention of the present application, the alumina silica fiber has a total of Na and K of 150 ppm or less,
Ca is 100 ppm or less, Fe is 100 ppm or less, Cu is 1.5 ppm or less, and Ni is 2 p
pm or less.

【００１５】[0015]

【発明の実施の形態】本発明者らは、アルミナシリカ繊
維の加熱に伴うクリストバライトの析出が、主にＣａ、
Ｃｕ、Ｎｉ、更にＮａ、Ｋ、Ｆｅなどの不純物に起因す
ることを知見して本発明をなしたものである。BEST MODE FOR CARRYING OUT THE INVENTION The present inventors have found that the precipitation of cristobalite accompanying the heating of alumina silica fibers is mainly caused by Ca,
The present invention has been made based on the finding that it is caused by impurities such as Cu, Ni, and Na, K, and Fe.

【００１６】アルミナシリカ繊維に含まれるＣａは、Ｎ
ａやＫなどのアルカリ金属元素と同様にシリカ部分の融
点を低下させ、クリストバライトの結晶化を著しく促進
させる。Ca contained in the alumina silica fiber is N
Like the alkali metal elements such as a and K, it lowers the melting point of the silica portion and remarkably promotes the crystallization of cristobalite.

【００１７】また、アルミナシリカ繊維に含まれるＣｕ
と、Ｎｉの挙動については、明確に解明できていない
が、ＣｕやＮｉはアルミナシリカ繊維のシリカ中を拡散
移動して繊維表面に濃縮してクリストバライトの析出が
局部的に促進されるものと推定される。Further, Cu contained in the alumina silica fiber
Although the behavior of Ni has not been clearly elucidated, it is presumed that Cu and Ni diffuse and move in the silica of the alumina silica fiber and concentrate on the fiber surface, and the precipitation of cristobalite is locally promoted. Is done.

【００１８】無機繊維製品の製造に際して、使用する
水、耐火粉末、有機バインダーや無機バインダーなど
は、繊維の表面或いは交点に凝集しやすいので、限定し
て使用することが好ましい。In the production of inorganic fiber products, water, refractory powder, organic binders, inorganic binders and the like used are liable to agglomerate on the surface or intersections of the fibers, so it is preferable to use them in a limited manner.

【００１９】例えば、水はイオン交換水或いは蒸留水を
使用すると、無機繊維製品に含まれるＮａ、Ｆｅ、Ｃ
ａ、Ｋ、Ｍｇなどの不純物が減少して好ましい。For example, when ion-exchanged water or distilled water is used as the water, Na, Fe, C contained in the inorganic fiber product is used.
It is preferable because impurities such as a, K, and Mg are reduced.

【００２０】耐火粉末は、アルミナ粉やムライト粉が好
ましい。これらの耐火粉末においても、アルコキシドを
原料とする高純度品や、アルカリの含有量を抑えた低ソ
ーダ品が好ましい。The refractory powder is preferably alumina powder or mullite powder. Among these refractory powders, a high-purity product using an alkoxide as a raw material and a low-soda product having a reduced alkali content are preferable.

【００２１】無機バインダーは、Ｎａ含有量の少ない低
ソーダのコロイダルシリカやアルミナゾル、気相法で作
られた高純度の微粒シリカ（例えば商品名アエロジル）
などが好ましい。これらの１種又は２種を同時に使用し
ても良い。Examples of the inorganic binder include low-sodium colloidal silica and alumina sol having a low Na content, and high-purity fine-grained silica prepared by a gas phase method (for example, Aerosil).
Are preferred. One or two of these may be used simultaneously.

【００２２】有機バインダーは、Ｎａなどのアルカリ金
属元素や他の不純物の少ない高純度の澱粉やアクリルや
セルロースなどが好ましい。The organic binder is preferably an alkali metal element such as Na or a high-purity starch, acryl or cellulose containing few other impurities.

【００２３】アルミナシリカ繊維とアルミナ繊維と耐火
粉末と無機バインダーの配合構成は、次の重量比が好ま
しい。The following weight ratio is preferred for the composition of the alumina silica fiber, the alumina fiber, the refractory powder and the inorganic binder.

【００２４】アルミナシリカ繊維とアルミナ繊維の重量
比は１００：０〜１００：１００であり、繊維と耐火粉
末の重量比は１００：０〜１００：１００であり、繊維
と耐火粉末の合計と無機バインダーの重量比は１００：
０〜８０：２０である。The weight ratio between the alumina silica fiber and the alumina fiber is 100: 0 to 100: 100, the weight ratio between the fiber and the refractory powder is 100: 0 to 100: 100, and the total of the fiber and the refractory powder and the inorganic binder Is 100:
0 to 80:20.

【００２５】次に、本発明の無機繊維製品が含有する不
純物について説明する。Next, the impurities contained in the inorganic fiber product of the present invention will be described.

【００２６】ＮａとＫの合計は５００ｐｐｍ以下が好ま
しく、Ｆｅは２００ｐｐｍ以下が好ましく、Ｃａは１３
０ｐｐｍ以下が好ましく、Ｃｕは２ｐｐｍ以下が好まし
く、Ｎｉは４ｐｐｍ以下が好ましい。これらの値を越え
ると、いずれも、使用の際に、発生する粉塵が多くなっ
て、被加熱物を汚染する。The total of Na and K is preferably 500 ppm or less, Fe is preferably 200 ppm or less, and Ca is 13 ppm or less.
0 ppm or less is preferable, Cu is preferably 2 ppm or less, and Ni is preferably 4 ppm or less. When these values are exceeded, the dust generated during use increases the contamination of the object to be heated.

【００２７】本発明のアルミナシリカ繊維が含有する不
純物については、ＮａとＫの合計は１５０ｐｐｍ以下が
好ましく、Ｆｅは１００ｐｐｍ以下が好ましく、Ｃａは
１００ｐｐｍ以下が好ましく、Ｃｕは１．５ｐｐｍ以下
が好ましく、Ｎｉは２ｐｐｍ以下が好ましい。これらの
値を越えると、いずれも、使用の際に、発生する粉塵が
多くなって、被加熱物を汚染する。Regarding the impurities contained in the alumina silica fiber of the present invention, the total of Na and K is preferably 150 ppm or less, Fe is preferably 100 ppm or less, Ca is preferably 100 ppm or less, Cu is preferably 1.5 ppm or less, Ni is preferably 2 ppm or less. When these values are exceeded, the dust generated during use increases the contamination of the object to be heated.

【００２８】アルミナシリカ繊維は、１０００℃〜１１
００℃に加熱してムライト結晶を析出させると耐熱性、
および耐久性が一層向上して好ましい。Alumina-silica fiber is used at 1000 ° C. to 11 ° C.
When heated to 00 ° C to precipitate mullite crystals, heat resistance,
Further, the durability is further improved, which is preferable.

【００２９】繊維に含まれるショットは、落下しやすい
ので、被加熱物の汚染を防止するために、処理をしてシ
ョットを少なくするのが好ましい。Since the shots contained in the fibers are easy to fall, it is preferable to reduce the number of shots by performing treatment in order to prevent contamination of the object to be heated.

【００３０】無機繊維製品は、その表面に、例えば、ア
ルミナゾル、アルミニウムのアルコキシド溶液などの高
純度のアルミナ系バインダー、または例えばコロイダル
シリカとアルミナゾルを混合した、高純度のムライト系
バインダーさらに低ソーダのコロイダルシリカなどのシ
リカ系バインダーを塗布すると、更に粉塵を防止でき
て、一層好ましい。The inorganic fiber product has, on its surface, a high-purity alumina-based binder such as alumina sol or an aluminum alkoxide solution, or a high-purity mullite-based binder obtained by mixing, for example, colloidal silica and alumina sol, and a low-soda colloid. It is more preferable to apply a silica-based binder such as silica because dust can be further prevented.

【００３１】有機バインダーを嫌う炉などに無機繊維製
品を使用する場合は、予め８００〜１６００℃で熱処理
すると、有機バインダーを除去できて好ましい。熱処理
の温度が８００℃未満ではそのような処理をするのに長
時間を要し、１６００℃を越えると、製品の強度が低下
する。When an inorganic fiber product is used in a furnace that dislikes an organic binder, a heat treatment at 800 to 1600 ° C. is preferable because the organic binder can be removed. When the temperature of the heat treatment is lower than 800 ° C., it takes a long time to perform such treatment, and when it exceeds 1600 ° C., the strength of the product is reduced.

【００３２】[0032]

【実施例】アルミナシリカ繊維、アルミナ繊維およびア
ルミナ粉を所定量計量し、これらの繊維とアルミナ粉の
合計量で１ｋｇを水１００リットルに混合分散した。そ
の後、陽性澱粉と低ソーダのコロイダルシリカをそれぞ
れ固形分で６０ｇ添加してスラリーを作り、真空成形法
により厚さ２０ｍｍの成形品を製作した。EXAMPLE A predetermined amount of alumina silica fiber, alumina fiber and alumina powder was weighed, and 1 kg of these fibers and alumina powder were mixed and dispersed in 100 liters of water. Thereafter, positive starch and low-soda colloidal silica were each added at a solid content of 60 g to form a slurry, and a molded product having a thickness of 20 mm was produced by a vacuum molding method.

【００３３】アルミナシリカ繊維の不純物の分析値を表
１に示し、アルミナ繊維の不純物の分析値を表２に示
し、アルミナ粉の不純物の分析値を表３に示す。The analytical values of the impurities in the alumina silica fiber are shown in Table 1, the analytical values of the impurities in the alumina fiber are shown in Table 2, and the analytical values of the impurities in the alumina powder are shown in Table 3.

【００３４】[0034]

【表１】 [Table 1]

【００３５】[0035]

【表２】 [Table 2]

【００３６】[0036]

【表３】 [Table 3]

【００３７】アルミナシリカ繊維は、ほぼアルミナが５
３重量％、シリカが４７重量％である。アルミナ繊維
は、ほぼアルミナが７２重量％、シリカが２８重量％で
ある。Alumina-silica fibers have almost 5 alumina.
3% by weight and 47% by weight of silica. The alumina fibers are approximately 72% by weight of alumina and 28% by weight of silica.

【００３８】成形品の構成と不純物の分析値を表４に示
し、その特性値を表５に示す。Table 4 shows the composition of the molded article and the analytical values of impurities. Table 5 shows the characteristic values.

【００３９】[0039]

【表４】 [Table 4]

【００４０】[0040]

【表５】 [Table 5]

【００４１】実施例２は、成形品を１２００℃で１時間
加熱処理したものである。実施例３では、１０００℃で
１５分間加熱処理をしたアルミナシリカ繊維を使用し
て、成形後に高純度のアルミナゾルを成形品の表面に塗
布した。実施例４においては、１０００℃で１５分間加
熱処理をしたアルミナシリカ繊維をアルミナシリカ繊維
全体の７０％使用し、アルミナ粉は高純度品を使用し、
成形品を１４００℃で３時間加熱処理した。In Example 2, a molded article was subjected to heat treatment at 1200 ° C. for 1 hour. In Example 3, after molding, high-purity alumina sol was applied to the surface of the molded article using alumina silica fiber that had been heat-treated at 1000 ° C. for 15 minutes. In Example 4, alumina silica fiber that was heat-treated at 1000 ° C. for 15 minutes was used in 70% of the entire alumina silica fiber, and alumina powder used was a high-purity product.
The molded article was heat-treated at 1400 ° C. for 3 hours.

【００４２】特性値の試験方法を説明する。A method for testing characteristic values will be described.

【００４３】粉塵発生量は、アルミナ板を置き、このア
ルミナ板上の４隅に高さ２０ｍｍの支えを置き、その支
えの上に１５０ｍｍ角の成形品を置いて、１４００℃−
８時間加熱を５回繰り返し、アルミナ板に落下した繊維
の数を数えた。The amount of dust generation was determined by placing an alumina plate, placing supports having a height of 20 mm on the four corners of the alumina plate, and placing a 150 mm square molded product on the supports, at 1400 ° C.
Heating was repeated 5 times for 8 hours, and the number of fibers dropped on the alumina plate was counted.

【００４４】汚染反応性は、細かく粉砕した成形品０．
３ｇを石英ガラス板の上に約３０ｍｍ角に置いて、１３
００℃で６時間加熱し、石英ガラスの失透を観察した。
失透の程度により、無、微少、少、中、大の５段階に分
けて評価した。失透の程度が大の状態では、石英ガラス
に無数の泡状物が観察された。The contamination reactivity was measured using a finely ground molded article.
3g is placed on a quartz glass plate at about 30mm square.
After heating at 00 ° C. for 6 hours, devitrification of the quartz glass was observed.
According to the degree of devitrification, evaluation was made in five stages: none, minute, small, medium, and large. When the degree of devitrification was large, countless bubbles were observed in the quartz glass.

【００４５】前述実施例１〜２と同様に比較例を作製し
た。Comparative examples were prepared in the same manner as in Examples 1 and 2.

【００４６】比較例１はＣｕが多い例である。比較例２
はＮｉが多い例である。比較例３は、Ｃａが多い例であ
る。比較例５では、通常品のアルミナ粉を使用した。比
較例４および５は、Ｎａ、Ｋ、Ｆｅ、Ｃａ、Ｃｕ、Ｎｉ
が多い例であり、粉塵発生量および汚染が多い。Comparative Example 1 is an example in which the amount of Cu is large. Comparative Example 2
Is an example of a large amount of Ni. Comparative Example 3 is an example in which Ca is large. In Comparative Example 5, normal alumina powder was used. Comparative Examples 4 and 5 are Na, K, Fe, Ca, Cu, Ni
And the amount of dust generation and contamination are high.

【００４７】実施例２と比較例４の成形品を１４００℃
で１０００時間加熱した後、アルミナシリカ繊維の表面
状態をＳＥＭにより観察した。その結果を、図１と図２
に示す。図１と図２を比較すると、図１では、図２のも
のよりも結晶成長が抑制されている。The molded articles of Example 2 and Comparative Example 4 were heated at 1400 ° C.
, And the surface state of the alumina silica fiber was observed by SEM. The results are shown in FIG. 1 and FIG.
Shown in When FIG. 1 is compared with FIG. 2, crystal growth is suppressed in FIG. 1 more than in FIG.

【００４８】[0048]

【発明の効果】本発明の無機繊維製品によると、加熱に
よる繊維の結晶化を抑制できて、耐熱性が向上し、粉塵
の発生が極めて少なく、被加熱物との汚染反応性も少な
い。この理由により、本発明の無機繊維製品を使用すれ
ば、被加熱物を汚染することがなく、被加熱物の品質お
よび生産量の向上が可能になる。According to the inorganic fiber product of the present invention, crystallization of the fiber by heating can be suppressed, heat resistance is improved, generation of dust is extremely small, and contamination reactivity with an object to be heated is small. For this reason, if the inorganic fiber product of the present invention is used, the quality of the object to be heated and the production amount can be improved without contaminating the object to be heated.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明のアルミナシリカ繊維のＳＥＭ観察結果
を示す図。FIG. 1 is a view showing the results of SEM observation of the alumina silica fiber of the present invention.

【図２】比較例のアルミナシリカ繊維のＳＥＭ観察結果
を示す図。FIG. 2 is a view showing the results of SEM observation of alumina silica fibers of a comparative example.

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 アルミナシリカ繊維と、アルミナ繊維を
主成分とし、必要に応じて耐火粉末と、有機バインダー
および無機バインダーのいずれか１種以上を含み、Ｎａ
とＫの合計が５００ｐｐｍ以下であり、Ｃａが１３０ｐ
ｐｍ以下であり、Ｆｅが２００ｐｐｍ以下である無機繊
維製品。1. An alumina-silica fiber, comprising an alumina fiber as a main component and, if necessary, a refractory powder and one or more of an organic binder and an inorganic binder.
Is less than 500 ppm, and Ca is 130 p
pm or less and Fe is 200 ppm or less. 【請求項２】 アルミナシリカ繊維と、アルミナ繊維を
主成分とし、必要に応じて耐火粉末と、有機バインダー
および無機バインダーのいずれか１種以上を含み、Ｎａ
とＫの合計が５００ｐｐｍ以下であり、Ｃａが１３０ｐ
ｐｍ以下であり、Ｆｅが２００ｐｐｍ以下であり、Ｃｕ
が２ｐｐｍ以下であり、Ｎｉが４ｐｐｍ以下である無機
繊維製品。2. An alumina-silica fiber and an alumina fiber as main components and, if necessary, a refractory powder and one or more of an organic binder and an inorganic binder.
Is less than 500 ppm, and Ca is 130 p
pm or less, Fe is 200 ppm or less, Cu
Is 2 ppm or less and Ni is 4 ppm or less. 【請求項３】 アルミナシリカ繊維は、ＮａとＫの合計
が１５０ｐｐｍ以下であり、Ｃａが１００ｐｐｍ以下で
あり、Ｆｅが１００ｐｐｍ以下であり、Ｃｕが１．５ｐ
ｐｍ以下であり、Ｎｉが２ｐｐｍ以下である請求項１ま
たは２記載の無機繊維製品。3. The alumina silica fiber has a total of Na and K of 150 ppm or less, Ca of 100 ppm or less, Fe of 100 ppm or less, and Cu of 1.5 p or less.
The inorganic fiber product according to claim 1 or 2, wherein the content of Ni is 2 ppm or less.
JP9111742A 1997-04-15 1997-04-15 Inorganic fiber product Pending JPH10292229A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9111742A JPH10292229A (en) 1997-04-15 1997-04-15 Inorganic fiber product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9111742A JPH10292229A (en) 1997-04-15 1997-04-15 Inorganic fiber product

Publications (1)

Publication Number Publication Date
JPH10292229A true JPH10292229A (en) 1998-11-04

Family

ID=14569044

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9111742A Pending JPH10292229A (en) 1997-04-15 1997-04-15 Inorganic fiber product

Country Status (1)

Country Link
JP (1) JPH10292229A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6348428B1 (en) * 1999-02-23 2002-02-19 Toshiba Monofrax Co., Ltd. High-purity crystalline inorganic fiber, molded body thereof, and method of production thereof
JP2003082569A (en) * 2001-04-13 2003-03-19 Toshiba Monofrax Co Ltd Inorganic fiber product
JP2011132629A (en) * 2009-12-24 2011-07-07 Isolite Insulating Products Co Ltd Flameproof paper made from ceramic fiber and method for producing the same
CN104704151A (en) * 2012-08-15 2015-06-10 3M创新有限公司 Sized short alumina-based inorganic oxide fiber, method of making, and composition including the same
JP2019039106A (en) * 2017-08-25 2019-03-14 デンカ株式会社 Alumina fibers, alumina fiber aggregate, and retaining material for use in exhaust gas purification device
JP2020040034A (en) * 2018-09-12 2020-03-19 イビデン株式会社 Method for producing honeycomb structure

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6348428B1 (en) * 1999-02-23 2002-02-19 Toshiba Monofrax Co., Ltd. High-purity crystalline inorganic fiber, molded body thereof, and method of production thereof
JP2003082569A (en) * 2001-04-13 2003-03-19 Toshiba Monofrax Co Ltd Inorganic fiber product
JP2011132629A (en) * 2009-12-24 2011-07-07 Isolite Insulating Products Co Ltd Flameproof paper made from ceramic fiber and method for producing the same
CN104704151A (en) * 2012-08-15 2015-06-10 3M创新有限公司 Sized short alumina-based inorganic oxide fiber, method of making, and composition including the same
US9617659B2 (en) 2012-08-15 2017-04-11 3M Innovative Properties Sized short alumina-based inorganic oxide fiber, method of making, and composition including the same
JP2019039106A (en) * 2017-08-25 2019-03-14 デンカ株式会社 Alumina fibers, alumina fiber aggregate, and retaining material for use in exhaust gas purification device
EP3623504A4 (en) * 2017-08-25 2020-07-15 Denka Company Limited Alumina fibers, alumina fiber aggregate, and retaining material for use in exhaust gas purification device
US11345641B2 (en) 2017-08-25 2022-05-31 Denka Company Limited Alumina fibers, alumina fiber aggregate, and retaining material for use in exhaust gas purification device
JP2020040034A (en) * 2018-09-12 2020-03-19 イビデン株式会社 Method for producing honeycomb structure

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