JPH02124760A - Fibrous magnesia heat insulating material and production thereof - Google Patents
Fibrous magnesia heat insulating material and production thereofInfo
- Publication number
- JPH02124760A JPH02124760A JP63275416A JP27541688A JPH02124760A JP H02124760 A JPH02124760 A JP H02124760A JP 63275416 A JP63275416 A JP 63275416A JP 27541688 A JP27541688 A JP 27541688A JP H02124760 A JPH02124760 A JP H02124760A
- Authority
- JP
- Japan
- Prior art keywords
- magnesia
- heat insulating
- insulating material
- whiskers
- fibrous
- 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
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 44
- 239000011810 insulating material Substances 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000002002 slurry Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000005245 sintering Methods 0.000 claims abstract description 4
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 239000012774 insulation material Substances 0.000 description 10
- 239000000919 ceramic Substances 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 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
- C04B30/00—Compositions for artificial stone, not containing binders
- C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はｉａ ｔａ状マグネシア断熱材及びその製造方
法に係り、特に工業用炉、実験炉等の比較的小型な炉に
用いられる断熱材、とりわけ超高温炉に用いられる断熱
材として好適な繊維状マグネシア断熱材及びその製造方
法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an ia ta-like magnesia insulation material and a method for manufacturing the same, and particularly to insulation materials used in relatively small-sized furnaces such as industrial furnaces and experimental furnaces. In particular, the present invention relates to a fibrous magnesia heat insulating material suitable as a heat insulating material used in ultra-high temperature furnaces, and a method for manufacturing the same.
［従来の技術］
従来より、１Ａｌｌ維状断熱材として、石綿、チタン酸
カリウム、ガラスウール、ロックウール等の比較的低温
度域での使用に対しての耐久性を備える断熱材は古くか
ら知られている。[Prior art] Insulating materials that are durable for use in relatively low temperature ranges, such as asbestos, potassium titanate, glass wool, and rock wool, have been known for a long time as 1All fibrous insulation materials. It is being
また、近年、１０００℃以上といった比較的高温度での
耐用性を備える断熱材として珪酸カルシウム（ゾノトラ
イト系）や、セラミックスファイバーを用いた断熱材な
どが開発されている。Furthermore, in recent years, heat insulating materials using calcium silicate (xonotrite type) and ceramic fibers have been developed as heat insulating materials that can withstand relatively high temperatures of 1000° C. or higher.
セラミックスファイバー断熱材を製造するには、まず、
仮焼アルミナ、シリカサンド等の高純度原料を用い、必
要に応じてＢ２０、Ｃｒ ２０３、その他の成分を添加
配合して電気炉で溶融する。そして溶融液を流出させる
ことにより非晶質化してファイバー状とし、これを成形
して断熱材とする。このファイバー状としたものはバル
クと称されるが、バルクを乾式又は湿式で不織布成形し
たものはブランケットと呼称され、少量の有機質又は、
無機質バインダーで成形したものはフェルトと呼称され
ている。To manufacture ceramic fiber insulation, first,
High-purity raw materials such as calcined alumina and silica sand are used, B20, Cr203, and other components are added and blended as necessary, and melted in an electric furnace. The molten liquid is then flowed out to become amorphous and form a fiber, which is then molded into a heat insulating material. This fibrous material is called a bulk, but a nonwoven fabric formed from a bulk using a dry or wet method is called a blanket, and contains a small amount of organic material or
Items molded with an inorganic binder are called felt.
このようなセラミックスファイバーよりなる断熱材の製
造にあたり、仮焼アルミナとシリカサンドとはＡ １１
２０２ ／ Ｓ ｉ Ｏ２モル比が１となるように配合
するのが一般的である。A11 What is calcined alumina and silica sand when manufacturing such a heat insulating material made of ceramic fibers?
202/S i O2 molar ratio is generally 1.
その他にＡｕ２０３とＳｉＯ：＋の配合比が９５対５の
、高アルミナ質の特殊な製法で製造される多結晶質アル
ミナファイバーよりなる断熱材も提案されている。In addition, a heat insulating material made of high alumina polycrystalline alumina fiber manufactured using a special manufacturing method with a blending ratio of Au203 and SiO:+ of 95:5 has also been proposed.
［発明が解決しようとする！ＩＷＩ
Ａｊ２２０３／ＳｉＯ２モル比が１の従来の高温用セラ
ミックスファイバーの融点は１５００℃と称されている
が、使用時の加熱温度により、９５０〜１０００℃の範
囲でムライトの結晶が析出し、１２００℃以上でクリス
トバライトの結晶が析出する。このような使用温度にお
ける結晶の析出がファイバーの収縮と劣化の原因となり
、ブランケット状又はフェルト状断熱材が収縮、劣化、
破損する。このため、従来のセラミックスファイバー断
熱材の耐用可能な温度は１２６０℃とされている。[Invention tries to solve! The melting point of conventional high-temperature ceramic fibers with a molar ratio of IWI Aj2203/SiO2 of 1 is said to be 1500°C, but depending on the heating temperature during use, mullite crystals precipitate in the range of 950 to 1000°C, and the melting point reaches 1200°C. With the above steps, cristobalite crystals are precipitated. The precipitation of crystals at these service temperatures causes shrinkage and deterioration of the fibers, causing the blanket or felt insulation to shrink, deteriorate, and deteriorate.
fall into disrepair. For this reason, the temperature at which conventional ceramic fiber insulation materials can withstand is said to be 1260°C.
また、多結晶質アルミナファイバーは耐用可能な温度が
１７００℃とされているが、高価なために、単独で多結
晶質アルミナファイバー断熱材として使用することは稀
であり、通常は多結晶質アルミナファイバーと非晶質セ
ラミックスファイバーとを混合してブランケット状又は
フェルト状に成形し断熱材を製造しているのが現状であ
る。In addition, polycrystalline alumina fiber is said to have a withstand temperature of 1700°C, but due to its high price, it is rarely used alone as a polycrystalline alumina fiber insulation material, and polycrystalline alumina fiber is usually Currently, heat insulating materials are manufactured by mixing fibers and amorphous ceramic fibers and forming them into a blanket or felt shape.
このため、その耐用可能な温度は１６００℃より低いも
のとなっている。Therefore, the temperature at which it can withstand is lower than 1600°C.
このように、従来においては１６００℃以上の超高温度
域においても使用可能な断熱材が提供されておらず、そ
の開発が望まれている。As described above, a heat insulating material that can be used even in an extremely high temperature range of 1600° C. or higher has not been provided in the past, and the development thereof is desired.
本発明は上記従来の問題点を解決し、耐用温度の著しく
高い断熱材及びその製造方法を提供することを目的とす
る。An object of the present invention is to solve the above-mentioned conventional problems and provide a heat insulating material with a significantly high service temperature and a method for manufacturing the same.
［課題を解決するための手段］
請求項（１）の繊維状マグネシア断熱材は、マグネシア
ウィスカーをブランケット又はフェルト状に成形した成
形体を焼結してなることを特徴とする
請求項（２）のｉａ ｉ（Ｉ状マグネシア断熱材の製造
方法は、マグネシアウィスカーを水又は水溶液に分散懸
濁し、得られた懸濁スラリーをブランケット又はフェル
ト状に脱水成形し、乾燥後、１５００℃以上の温度でウ
ィスカーの表面同志を部分的に焼結させることを特徴と
する。[Means for Solving the Problems] Claim (2), wherein the fibrous magnesia heat insulating material according to claim (1) is formed by sintering a molded body obtained by molding magnesia whiskers into a blanket or felt shape. ia i (The manufacturing method of I-shaped magnesia insulation material is to disperse and suspend magnesia whiskers in water or an aqueous solution, dehydrate and mold the resulting suspension slurry into a blanket or felt shape, and after drying, process at a temperature of 1500°C or higher. It is characterized by partially sintering the surfaces of the whiskers.
以下に本発明の詳細な説明する。The present invention will be explained in detail below.
請求項（１）の繊維状マグネシア断熱材は、好ましくは
請求項（２）の繊維状マグネシア断熱材の製造方法によ
り製造される。The fibrous magnesia heat insulating material according to claim (1) is preferably produced by the method for producing a fibrous magnesia heat insulating material according to claim (2).
以下に請求項（２）の繊維状マグネシア断熱材の製造方
法について説明する。The method for producing a fibrous magnesia heat insulating material according to claim (2) will be described below.
請求項（２）の方法においては、まず、マグネシアウィ
スカーを水又は水溶液に分散懸濁し懸濁スラリーとする
。この懸濁スラリーのマグネシアウィスカー含有量には
特に制限はないが、一般には５〜３０ｇのマグネシアウ
ィスカーを１００ｍ、Ｑ程度の水又は水溶液に懸濁させ
る。そして、得られた懸濁スラリーを公知の方法に従っ
て脱水成形し、ブランケット状又はフェルト状成形体を
得る。In the method of claim (2), first, magnesia whiskers are dispersed and suspended in water or an aqueous solution to form a suspended slurry. There is no particular limit to the magnesia whisker content of this suspension slurry, but generally 5 to 30 g of magnesia whiskers are suspended in about 100 m, Q of water or an aqueous solution. Then, the obtained suspension slurry is dehydrated and molded according to a known method to obtain a blanket-like or felt-like molded product.
この際、フェルト状成形体とするには、分散媒体として
有機質バインダー又は無機質バインダーを含有する水溶
液を用いて懸濁スラリーを調製する。この場合、有機質
バインダーとしては、メチルセルローズ、エチルセルロ
ーズ、ポリビニルアルコール等を用いることができ、無
機質バインダーとしてはシリカ、アルミナ、ジルコニア
等を用いることができる。これらの有機質又は無機質バ
インダーの使用量はマグネシアウィスカーに対して０．
５〜５．Ｏ重量％程度とするのが好ましい。At this time, in order to form a felt-like molded body, a suspension slurry is prepared using an aqueous solution containing an organic binder or an inorganic binder as a dispersion medium. In this case, as the organic binder, methyl cellulose, ethyl cellulose, polyvinyl alcohol, etc. can be used, and as the inorganic binder, silica, alumina, zirconia, etc. can be used. The amount of these organic or inorganic binders used is 0.00% relative to the magnesia whisker.
5-5. It is preferable to set it to about 0% by weight.
懸濁スラリーの脱水成形方法としては、特に制限はない
が、例えば、懸濁スラリーを成形型枠に流し込み、型押
しにより脱水成形する方法等を採用することができる。There are no particular limitations on the method for dehydrating and molding the suspended slurry, but for example, a method of pouring the suspended slurry into a molding frame and dehydrating and molding by pressing can be adopted.
得られた成形体は十分に乾燥した後、１５００℃以上の
炉内で焼成してウィスカーの表面同志を焼結させる。こ
の焼成は、通常、１５００℃以上で０．５時間以上、好
ましくは１５５０〜１６００℃の温度で１〜２時間程度
行なう。After the obtained molded body is sufficiently dried, it is fired in a furnace at 1500° C. or higher to sinter the surfaces of the whiskers. This firing is usually carried out at a temperature of 1500°C or higher for 0.5 hours or more, preferably at a temperature of 1550 to 1600°C for about 1 to 2 hours.
このようにして製造される、マグネシアウィスカーの表
面同志が接合された、耐熱性に優れた繊維状マグネシア
断熱材は、嵩密度が０．１〜０．５ｇ／ｃｍ’程度であ
ることが好ましい。It is preferable that the fibrous magnesia heat insulating material with excellent heat resistance, which is manufactured in this way and has magnesia whiskers bonded together, has a bulk density of about 0.1 to 0.5 g/cm'.
なお、本発明において、マグネシアウィスカーとしては
、特開昭６３−１６６７１５号で開示されるマグネシア
ウィスカーの製造方法により、即ち、塩化マグネシウム
とハロゲン化物との混合物を６５０℃以上で加熱溶融し
、得られた溶融塩を水蒸気雰囲気で６５０〜１０００℃
で加熱することにより製造されるマグネシアウィスカー
、或いは特願昭６３−１４１１４６号、特願昭６３−１
４５４６８号、特願昭６３−１４５４６９号で製造され
るマグネシアウィスカー等を用いることができ、その直
径は１〜５μｍ、長さは５〜３０００μｍ程度のものが
好適である。In the present invention, the magnesia whiskers are obtained by the method for manufacturing magnesia whiskers disclosed in JP-A-63-166715, that is, by heating and melting a mixture of magnesium chloride and a halide at 650°C or higher. The molten salt was heated to 650-1000℃ in a steam atmosphere.
Magnesia whiskers produced by heating with
Magnesia whiskers manufactured in Japanese Patent Application No. 45468 and Japanese Patent Application No. 63-145469 can be used, and those having a diameter of about 1 to 5 μm and a length of about 5 to 3000 μm are suitable.
［作用］
本発明のｌａ維状状マグネシア断熱材構成するマグネシ
アウィスカーは、針状のマグネシア単結晶であり、マグ
ネシアの物理的、化学的性質を有効に生かすことができ
るものである。即ち、このマグネシアウィスカーは、マ
グネシアの融点が２８００℃と極めて高いため耐熱性に
著しく優れる。しかも、マグネシアウィスカーは軽量で
引張強度も１００〜１０００ （Ｋｇ／ｍｍ″）と高強
度である。また、針状の結晶体であるため、ブランケッ
ト状又はフェルト状の軽量成形体を容易に製造でざる。[Function] The magnesia whiskers constituting the la fibrous magnesia heat insulating material of the present invention are acicular single crystals of magnesia, and can effectively utilize the physical and chemical properties of magnesia. That is, this magnesia whisker has extremely high heat resistance because the melting point of magnesia is as high as 2,800°C. Furthermore, magnesia whiskers are lightweight and have a high tensile strength of 100 to 1000 (Kg/mm'').Also, since they are needle-shaped crystals, lightweight molded objects in the form of blankets or felts can be easily produced. Colander.
その上、多結晶体セラミックスに比べて安価に提供され
る。Moreover, it is provided at a lower cost than polycrystalline ceramics.
このため、請求項（１）のｔａ ｆ、ｌｉ状マグネシア
断熱材によれば、Ｕ量で、耐熱使用温度が高く、かつ機
域的強度も高い繊維状断熱材が低コストに提供される。Therefore, according to the TA F, Li-like magnesia heat insulating material of claim (1), a fibrous heat insulating material having a high heat-resistant operating temperature and high mechanical strength can be provided at low cost with a U content.
因みに請求項（１）の繊維状マグネシア断熱材は、１６
００℃以上の温度にて直接に高温物体や高温雰囲気に接
する耐火断熱材として使用することが可能である。Incidentally, the fibrous magnesia heat insulating material of claim (1) has 16
It can be used as a fireproof heat insulating material that comes into direct contact with a high-temperature object or high-temperature atmosphere at a temperature of 00°C or higher.
請求項（１）のｉａ維状状マグネシア断熱材、請求項（
２）の方法により容易かつ効率的に製造することができ
る。The ia fibrous magnesia insulation material of claim (1), claim (
It can be easily and efficiently manufactured by method 2).
［実施例コ 以下実施例及び比較例について説明する。[Example code] Examples and comparative examples will be described below.
実施例１
直径１〜５μｍ１長さ５〜３０００μｍのマグネシアウ
ィスカー２０ｇを１００ｍ１の水に懸濁させ、さらにア
ルミナを３％添加し、得られた懸濁スラリーを濾過布を
敷いた型枠に流し込み、型押しして脱水した。その後、
乾燥炉で２〜３日乾燥して、厚さ２．４ｃｍの軽量マッ
トを得た。これを１６００℃で２時間焼成することによ
り、ウィスカーの表面が互いに焼結した本発明の１ａ維
状マグネシア断熱材を得た。Example 1 20 g of magnesia whiskers with a diameter of 1 to 5 μm and a length of 5 to 3000 μm were suspended in 100 ml of water, and 3% alumina was added, and the resulting suspension slurry was poured into a mold lined with a filter cloth. Embossed and dehydrated. after that,
It was dried in a drying oven for 2 to 3 days to obtain a lightweight mat with a thickness of 2.4 cm. By firing this at 1600° C. for 2 hours, a 1a fibrous magnesia heat insulating material of the present invention in which the surfaces of the whiskers were sintered together was obtained.
得られた！ａ維状マグ未シア断熱材の物性及び耐熱試験
結果を第１表に示す。Got it! Table 1 shows the physical properties and heat resistance test results of the fibrous MAG unsheared insulation material.
なお、耐熱試験は繊維状マグネシア断熱材を炉内容積４
Ｉｌの実炉の内壁に取り付け、第１表に示す男、温時間
で昇温した後、１７５０℃で１０００時間保持した場合
の断熱材の経時変化を調べることにより行なった。In addition, in the heat resistance test, the fibrous magnesia insulation material was
The heat insulating material was attached to the inner wall of an actual furnace, heated for the time shown in Table 1, and then held at 1750° C. for 1000 hours.
比較例１
マグネシアウィスカーの代りにアルミナファイバー（直
径１〜５μｍ１長さ１００〜５０００ｍｍ）を用いたこ
と以外は同様にして繊維状アルミナ断熱材を製造した。Comparative Example 1 A fibrous alumina heat insulating material was produced in the same manner except that alumina fibers (1 to 5 μm in diameter and 100 to 5000 mm in length) were used instead of magnesia whiskers.
得られたｌａ維状アルミア断熱材の物性及び耐熱試験結
果を第１表に示す。Table 1 shows the physical properties and heat resistance test results of the obtained la fibrous alumia insulation material.
第１表
第１表より明らかなように、本発明の繊維状マグネシア
断熱材は断熱性に１炎れ、しかも！ｌｆｃである。その
上、耐熱性に著しく（量れ、１６５０℃といった超高温
においても長時間安定に使用可能である。Table 1 As is clear from Table 1, the fibrous magnesia heat insulating material of the present invention has excellent heat insulating properties. It is lfc. In addition, it has excellent heat resistance and can be used stably for a long time even at extremely high temperatures of 1,650°C.
［発明の効果コ
以上詳述した通り、請求項（１）の繊維状マグネシア断
熱材は、
■ 耐熱使用温度が著しく高く、超高温炉等の断熱材と
しても長時間安定して使用することができる。[Effects of the Invention] As detailed above, the fibrous magnesia heat insulating material of claim (1) has an extremely high heat resistance and can be used stably for a long period of time as a heat insulating material for ultra-high temperature furnaces, etc. can.
■ ＩＩ量で取り扱い性に優れる。■ Excellent handling properties due to II amount.
■ 高強度で耐久性に（量れる。■ High strength and durability (can be measured).
■ 断熱性が著しく高い。■ Extremely high insulation properties.
■ 安価に提供することができる。■ Can be provided at low cost.
等の効果を有し、工業的に極めて有用である。It has the following effects and is extremely useful industrially.
請求項（２）の繊維状マグネシア断熱材の製造方法によ
れば、このような高特性ｌａ維状状マグネシア断熱材容
易かつ効率的に製造することができる。According to the method for producing a fibrous magnesia heat insulating material of claim (2), such a high-performance la fibrous magnesia heat insulating material can be easily and efficiently produced.
Claims (2)
ト状に成形した成形体を焼結してなることを特徴とする
繊維状マグネシア断熱材。(1) A fibrous magnesia heat insulating material characterized by being made by sintering a molded body made by molding magnesia whiskers into a blanket or felt shape.
し、得られた懸濁スラリーをブランケット又はフェルト
状に脱水成形し、乾燥後、１５００℃以上の温度でウィ
スカーの表面同志を部分的に焼結させることを特徴とす
る繊維状マグネシア断熱材の製造方法。(2) Magnesia whiskers are dispersed and suspended in water or an aqueous solution, the resulting suspended slurry is dehydrated and formed into a blanket or felt shape, and after drying, the surfaces of the whiskers are partially sintered at a temperature of 1500°C or higher. A method for producing a fibrous magnesia heat insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63275416A JPH02124760A (en) | 1988-10-31 | 1988-10-31 | Fibrous magnesia heat insulating material and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63275416A JPH02124760A (en) | 1988-10-31 | 1988-10-31 | Fibrous magnesia heat insulating material and production thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02124760A true JPH02124760A (en) | 1990-05-14 |
| JPH0555462B2 JPH0555462B2 (en) | 1993-08-17 |
Family
ID=17555200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63275416A Granted JPH02124760A (en) | 1988-10-31 | 1988-10-31 | Fibrous magnesia heat insulating material and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02124760A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111117310A (en) * | 2020-01-19 | 2020-05-08 | 北京天佐消防产品有限公司 | Non-expansive gypsum fire-retardant coating and preparation method thereof |
-
1988
- 1988-10-31 JP JP63275416A patent/JPH02124760A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111117310A (en) * | 2020-01-19 | 2020-05-08 | 北京天佐消防产品有限公司 | Non-expansive gypsum fire-retardant coating and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0555462B2 (en) | 1993-08-17 |
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