JP2813391B2 - Glazed lightweight ceramic product and method for producing the same - Google Patents
Glazed lightweight ceramic product and method for producing the sameInfo
- Publication number
- JP2813391B2 JP2813391B2 JP1303364A JP30336489A JP2813391B2 JP 2813391 B2 JP2813391 B2 JP 2813391B2 JP 1303364 A JP1303364 A JP 1303364A JP 30336489 A JP30336489 A JP 30336489A JP 2813391 B2 JP2813391 B2 JP 2813391B2
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- JP
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- Prior art keywords
- temperature
- slurry
- glazed
- sio
- calcium silicate
- Prior art date
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/18—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mixtures of the silica-lime type
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は新規な施釉軽量セラミックス製品とその製造
方法に関するものである。Description: TECHNICAL FIELD The present invention relates to a novel glazed lightweight ceramic product and a method for producing the same.
釉薬を施したセラミックス製品は陶器，磁器など種々
あるが、嵩比重が１以下の実用的施釉軽量セラミックス
製品は本発明者等の知る限りではまだ出現していない。
焼成型セラミックス製品の軽量化自体は多孔質化によっ
て容易にできるが、強度が低下するためあまり嵩比重を
低下できないからである。一方水蒸気養生軽量気泡コン
クリートは嵩比重が１以下で未実用的な強度を有する
が、施釉温度に加熱すると結晶水の脱水による収縮が大
きく、施釉には適当でない。There are various types of glazed ceramic products such as pottery and porcelain, but practically glazed lightweight ceramic products having a bulk specific gravity of 1 or less have not yet appeared as far as the present inventors know.
This is because the weight reduction of the fired ceramic product itself can be easily achieved by making it porous, but the strength is lowered, so that the bulk specific gravity cannot be reduced much. On the other hand, steam-cured lightweight cellular concrete has an unpractical strength with a bulk specific gravity of 1 or less, but when heated to a glazing temperature, shrinkage due to dehydration of crystallization water is large and is not suitable for glazing.
本発明の目的は軽量でしかも実用上充分な強度を有す
る施釉セラミックス製品とその製造方法を提供すること
にある。An object of the present invention is to provide a glazed ceramic product which is lightweight and has sufficient strength for practical use, and a method for producing the same.
上記目的を達成するため本発明の施釉軽量セラミック
ス製品は、CaO/SiO2モル比が0.8〜1.1,Al/Si＋Al原子比
が0.01〜0.04であり、ワラストナイトの生成率が全体の
35重量％以上とされ、嵩比重が0.3〜1.0であるワラスト
ナイト系軽量珪酸カルシウム成形体の表面に釉薬の熔融
被膜を有する点に特徴がある。To achieve the above object, the glazed lightweight ceramic product of the present invention has a CaO / SiO 2 molar ratio of 0.8 to 1.1, an Al / Si + Al atomic ratio of 0.01 to 0.04, and a wollastonite generation rate of the whole.
It is characterized by having a glaze melt coating on the surface of a wollastonite-based lightweight calcium silicate molded body having a bulk specific gravity of 0.3 to 1.0, which is 35% by weight or more.
又、このような施釉軽量セラミックス製品を製造する
ための本発明法の一つは、珪酸質原料粉末とポルトラン
ドセメントを含んだ石灰質原料粉末とを、CaO/SiO2モル
比が0.8〜1.1でかつ全原料中に含有するAl2O3とSiO2と
から求めたAl/Si＋Al原子比が0.01〜0.04となるように
混合し、該混合物に水を加え、更に気泡を含有せしめた
スラリーを調製し、これを型枠に注入して硬化させる
か、又は該混合物に金属アルミニウム粉と水を加えてス
ラリーとし、これを型枠に注入して発泡硬化させた後、
ゾノトライトの生成率が全体量の35重量％以上となるま
で190〜240℃の温度で水蒸気養生し、得られたゾノトラ
イト系軽量珪酸カルシウム水和物成形体を700℃以上の
温度で加熱脱水してワラストナイト系軽量珪酸カルシウ
ム成形体とし、この成形体に釉薬を施し、加熱して釉薬
を熔融後、300℃／時以下の速度で冷却する点に特徴が
ある。更に本発明の他の一つの方法は、前記ゾノトライ
ト系軽量珪酸カルシウム水和物成形体に直接軟化点が76
0℃以上の釉薬を施し、670〜760℃に昇温して0.5〜10時
間保持し、次いで更に昇温して釉薬を熔融後、300℃／
時以下の速度で冷却する点に特徴がある。Further, one of the methods of the present invention for producing such a glazed lightweight ceramic product is that a siliceous raw material powder and a calcareous raw material powder containing Portland cement have a CaO / SiO 2 molar ratio of 0.8 to 1.1 and The Al / Si + Al atomic ratio determined from Al 2 O 3 and SiO 2 contained in all the raw materials is mixed so as to be 0.01 to 0.04, water is added to the mixture, and a slurry containing bubbles is further prepared. This is poured into a mold and cured, or a metal aluminum powder and water are added to the mixture to form a slurry, which is poured into the mold and foamed and cured.
Steam curing at a temperature of 190 to 240 ° C until the production rate of zonotolite becomes 35% by weight or more of the total amount, and the obtained zonotolite-based lightweight calcium silicate hydrate compact is heated and dehydrated at a temperature of 700 ° C or more. It is characterized in that it is a wollastonite-based lightweight calcium silicate compact, which is coated with a glaze, heated to melt the glaze, and then cooled at a rate of 300 ° C./hour or less. Still another method of the present invention is directed to the above-mentioned zonotolite-based lightweight calcium silicate hydrate compact having a softening point of 76% directly.
Apply a glaze of 0 ° C or higher, raise the temperature to 670 to 760 ° C, hold for 0.5 to 10 hours, then raise the temperature further to melt the glaze, then 300 ° C /
It is characterized in that it cools at a speed less than an hour.
上記のように本発明の施釉軽量セラミック製品はワラ
ストナイト系軽量珪酸カルシウム成形体を基材としてい
る。ワラストナイト系珪酸カルシウムはゾノトライト系
珪酸カルシウムが先行物質であり、ゾノトライト系珪酸
カルシウムは珪酸質原料と石灰質原料とから水熱反応に
よって作られる。本発明はAlを不純物として含有するポ
ルトランドセメントを併用してもゾノトライトを生成し
得るという知見に基いているが、従来はAlの混入はゾノ
トライトの生成を妨げると考えられていたのである。ポ
ルトランドセメントの使用によりスラリーの粘性が増
し、生ケーキの強度が高まり、しかもAl粉を用いた場合
に発泡時間の調節が容易になるなど、実用上種々の利点
がある。As described above, the glazed lightweight ceramic product of the present invention is based on a wollastonite-based lightweight calcium silicate compact. The wollastonite-based calcium silicate is preceded by a zonotolite-based calcium silicate, and the zonotorite-based calcium silicate is produced by a hydrothermal reaction from a siliceous raw material and a calcareous raw material. The present invention is based on the finding that zonotolite can be generated even when Portland cement containing Al as an impurity is used in combination. However, it has been conventionally thought that the incorporation of Al prevents the generation of zonotolite. The use of Portland cement increases the viscosity of the slurry, increases the strength of the raw cake, and has various practical advantages, such as easy adjustment of the foaming time when Al powder is used.
本発明でいうゾノトライト系珪酸カルシウムは、ゾノ
トライト結晶、トバモライト結晶とCSHゲルと呼ばれる
非晶質物質とから構成される。ゾノトライト結晶（6CaO
・6SiO2・H2O）は700℃以上の加熱によって結晶水が脱
け、ワラストナイト（CaO・SiO2）に変る。この加熱に
よってトバモライト結晶とCSHゲルも脱水して非晶質珪
酸カルシウムに変るが、その際これらの一部もワラスト
ナイトに変ると思われるが、その変化がどの程度起るか
はまだ確認されていない。ワラストナイト系成形体の特
性はこのワラストナイトと非晶質珪酸カルシウムの存在
割合によって異なってくるが、前記のようにワラストナ
イトは主にゾノトライト結晶から生成すると考えられる
ので、ワラストナイト系珪酸カルシウム中のワラストナ
イトの含有率を35重量％以上とするにはゾノトライトが
35重量％以上生成している必要がある。このゾノトライ
ト含有率が35重量％未満では加熱脱水の際の収縮率が大
き過ぎて、ヒビ割れの原因となる。The zonotolite calcium silicate referred to in the present invention is composed of zonotolite crystals, tobermorite crystals and an amorphous substance called CSH gel. Zonotorite crystals (6CaO
・ 6SiO 2・ H 2 O) removes water of crystallization by heating at 700 ° C or more and changes to wollastonite (CaO ・ SiO 2 ). This heating also dehydrates the tobermorite crystals and CSH gel to amorphous calcium silicate.At this time, it seems that some of these also change to wollastonite, but it has not yet been confirmed to what extent this change occurs. Not. The properties of the wollastonite-based molded product differ depending on the content ratio of the wollastonite and the amorphous calcium silicate. However, as described above, wollastonite is considered to be mainly formed from zonotrite crystals, and To make the content of wollastonite in system-based calcium silicate 35% by weight or more, zonotrite
It must be produced at least 35% by weight. If the zonotolite content is less than 35% by weight, the shrinkage during heat dehydration is too large, causing cracks.
本発明においてCaO/SiO2モル比を0.8〜1.1とする理由
はゾノトライト生成率を35重量％以上にするためであ
り、この範囲を外れるとゾノトライトの生成が35重量％
を下回ることになる。The reason for setting the CaO / SiO 2 molar ratio to 0.8 to 1.1 in the present invention is to increase the zonotrite generation rate to 35% by weight or more.
Will be below.
Al/Si＋Al原子比を0.01〜0.04とするのは、0.01未満
ではポルトランドセメントの使用量が少くなり過ぎて前
記利点を活用し得なくなり、0.04を超えるとゾノトライ
ト生成率が35重量％を下回るからである。The reason that the Al / Si + Al atomic ratio is set to 0.01 to 0.04 is that if it is less than 0.01, the amount of Portland cement used is too small to make use of the above advantages, and if it exceeds 0.04, the zonotolite generation rate is less than 35% by weight. is there.
成形体を軽量にするには通常のトバモライト系軽量気
泡コンクリートと同様に気泡を含ませるのが良い。気泡
を含有させるには原料混合物スラリーに発泡剤として適
当量のアルミニウム粉末を加えて型枠に注入後発泡させ
るか、または起泡剤により水溶液を起泡させて原料スラ
リーと混合して気泡を含有するスラリーを調製して型枠
に注入硬化させるか、何れであっても良い。この気泡の
含有度によって成形体の嵩比重を種々変えることができ
る。本発明の成形体にあっては嵩比重は0.3〜1.0とする
必要がある。嵩比重が0.3未満では成形体の強度が小さ
過ぎて実用的でなく、1.0を超えると断熱材としての性
能が不充分になるからである。In order to reduce the weight of the molded article, it is preferable to include cells as in the case of ordinary tobermorite-based lightweight cellular concrete. To contain bubbles, an appropriate amount of aluminum powder is added to the raw material mixture slurry as a foaming agent and injected into a mold and then foamed, or an aqueous solution is foamed with a foaming agent and mixed with the raw material slurry to contain bubbles. Slurries to be prepared and injection-hardened into a mold. The bulk specific gravity of the molded article can be variously changed depending on the content of the bubbles. In the molded article of the present invention, the bulk specific gravity needs to be 0.3 to 1.0. If the bulk specific gravity is less than 0.3, the strength of the molded article is too small to be practical, and if it exceeds 1.0, the performance as a heat insulating material becomes insufficient.
水蒸気養生温度は190〜240℃が必要である。この温度
が190℃より低いと養生時間があまり長くかかり過ぎて
不経済であり、240℃より高くするにはオートクレーブ
の耐圧を高める必要があり、その割に養成時間がそれ程
短縮される訳でないので不経済である。この温度範囲で
ゾノトライトの生成率が全体の35重量％以上となるまで
水蒸気養成する。時間が不足するとゾノトライトが充分
生成しないので、実験により必要な時間を求めれば良
い。The steam curing temperature must be 190-240 ° C. If this temperature is lower than 190 ° C, the curing time is too long, which is uneconomical.If it is higher than 240 ° C, it is necessary to increase the pressure resistance of the autoclave, and the curing time is not so shortened. It is uneconomical. In this temperature range, steam cultivation is performed until the production rate of zonotolite becomes 35% by weight or more of the whole. If the time is insufficient, zonotolite will not be generated sufficiently, so the necessary time may be determined by experiments.
ゾノトライトの生成率は次のようにして測定できる。
ゾノトライトは700〜850℃の間で結晶水が脱離してワラ
ストナイトとなるのに対し、共存するトバモライト,CSH
の結晶水，付着水は700℃以下で全て脱離する。このこ
とからゾノトライトの脱水による減量が、全体がゾノト
ライトであると仮定した場合に比して、どれだけの割合
であるかを測定することができ、ゾノトライトの存在割
合を知ることができる。The production rate of zonotolite can be measured as follows.
Zonotorite desorbs water of crystallization between 700 and 850 ° C to form wollastonite, while tobermorite and CSH coexist.
All of the crystallization water and attached water are desorbed at 700 ° C or less. From this, it is possible to measure the ratio by which the weight loss due to the dehydration of zonotolite is zonotolite as a whole, and it is possible to know the existence ratio of zonotolite.
このようにして得られたワラストナイト系軽量珪酸カ
ルシウム成形体に釉薬を施し、加熱して釉薬を熔融後30
0℃／時以下の速度で冷却すれば本発明の施釉軽量セラ
ミックス製品を得ることができる。冷却速度を300℃／
時以下とするのは、これより早く冷却すると施釉被膜に
亀裂が入ることがあるからである。A glaze is applied to the wollastonite-based lightweight calcium silicate compact obtained in this way, and the glaze is melted by heating to obtain a glaze.
By cooling at a rate of 0 ° C./hour or less, the glazed lightweight ceramic product of the present invention can be obtained. Cooling rate 300 ℃ /
The reason why the time is not more than the hour is that if the cooling is performed earlier, the glaze coating may crack.
一方本発明の施釉軽量セラミックス製品はゾノトライ
ト系軽量珪酸カルシウム水和物成形体に直接施釉して得
ることもできる。On the other hand, the glazed lightweight ceramic product of the present invention can also be obtained by directly glazing a zonotorite-based lightweight calcium silicate hydrate compact.
その場合用いる釉薬は軟化点が760℃以上である必要
があり、昇温方法も670〜760℃に昇温後0.5〜10時間そ
の温度に保持し、次いで更に昇温して釉薬を熔融すると
いうようにする必要がある。釉薬の軟化点が760℃未満
では素材からの脱水を妨げることになる。昇温を一旦67
0〜760℃で保持するのは、670℃未満ではゾノトライト
の脱水が起らず、760℃を超えると脱水が急激に起って
成形体が破壊されるからであり、保持時間が0.5時間未
満では十分な脱水が行われず、10時間以上保持してもそ
れ以上脱水せず不経済だからである。冷却速度を300℃
／時以下とする点は前記と同様である。In that case, the glaze used must have a softening point of 760 ° C or higher, and the method of raising the temperature is to raise the temperature to 670 to 760 ° C, hold it for 0.5 to 10 hours, and then raise the temperature further to melt the glaze You need to do that. If the softening point of the glaze is less than 760 ° C, it will hinder dehydration from the material. Raise the temperature once to 67
The reason for holding at 0 to 760 ° C is that the dehydration of zonotolite does not occur below 670 ° C, and the dehydration occurs rapidly above 760 ° C and the molded body is destroyed, and the holding time is less than 0.5 hour In such a case, sufficient dehydration is not performed, and even if it is held for 10 hours or more, no further dehydration is performed, which is uneconomical. Cooling rate 300 ℃
The point of / hour or less is the same as above.
このようにして得られた本発明の施釉セラミックス製
品は軽量でかつ適度の強度を備え、しかも耐熱性，断熱
性にも優れており、種々の用途に適用できる。製品の形
状は型枠，鋳型で任意に形成でき、又、素材の加工性が
優れているので、任意の形状に切出して用いることもで
きる。The glazed ceramic product of the present invention thus obtained is lightweight, has a suitable strength, and is excellent in heat resistance and heat insulation, and can be applied to various uses. The shape of the product can be arbitrarily formed by using a mold and a mold, and since the material is excellent in workability, it can be cut into an arbitrary shape and used.
〔実施例〕 SiO2分を94.5重量％、Al2O3分を1.3重量％含有する珪
石44重量部と、CaO分を96.9重量％含有する生石灰11重
量部、CaO分を72.6重量％含有する消石灰42重量部、及
びCaO分を64.8重量％、SiO2分を21.5重量％、Al2O3分を
6.0重量％含有するポルトランドセメント３重量部に、
水65重量部と金属アルミニウム粉0.065重量部を加えて
スラリーとし、45cm×65cm×深さ15cmの型枠に該スラリ
ーを注入して発泡硬化させ、硬化後型枠を外して220℃
で12時間オートクレーブ中で水蒸気養生して嵩比重0.5
のゾノトライト系軽量珪酸カルシウム水和物成形体を
得、この成形体から20cm角、3cm厚の寸法の板を切り出
して該板の一方の主面にフリット釉（日本フェロー社
製，品番12−3609）をスプレーを用いて2kg/m2（乾燥重
量）当て施釉し、電気炉中で焼成した。焼成は第１昇
温工程、第１保持工程、第３昇温工程、第２保持
工程及び降温工程からなる。焼成実験はの昇温素度
との昇温速度は300℃／時、の保持温度900℃、保持
時間10時間及びの降温速度25℃／時と一定にし、の
保持温度と時間をいくつか変えて行い、得られた焼成物
の釉面及び基材を観察した。結果を第１表に示す。EXAMPLES The SiO 2 minutes 94.5 wt%, and silica 44 parts by weight containing Al 2 O 3 min 1.3 wt%, quicklime 11 parts by weight containing CaO content 96.9% by weight, containing CaO content 72.6 wt% 42 parts by weight of slaked lime, 64.8% by weight of CaO, 21.5% by weight of SiO 2 and 3 minutes of Al 2 O
To 3 parts by weight of Portland cement containing 6.0% by weight,
65 parts by weight of water and 0.065 parts by weight of metal aluminum powder were added to form a slurry, and the slurry was poured into a mold having a size of 45 cm x 65 cm x 15 cm in depth to foam and harden.
Cured in an autoclave for 12 hours at a bulk specific gravity of 0.5
Of zonotrite-based lightweight calcium silicate hydrate, and cut out a plate having a size of 20 cm square and 3 cm in thickness from the formed body, and frit glaze (manufactured by Nippon Fellow, part number 12-3609) on one main surface of the plate. ) Was glazed with 2 kg / m 2 (dry weight) using a spray and baked in an electric furnace. The firing includes a first temperature raising step, a first holding step, a third temperature raising step, a second holding step, and a temperature lowering step. The firing experiment was performed at a constant heating rate of 300 ° C / hour, a holding temperature of 900 ° C, a holding time of 10 hours, and a constant cooling rate of 25 ° C / hour. The glaze surface and the substrate of the obtained fired product were observed. The results are shown in Table 1.
第１表から実験No.3で保持温度770℃では急激な脱水
が起ること、実験No.4で保持時間が短か過ぎて釉薬が熔
融する段階で残りの脱水が起ること、実験No.5で保持温
度が低過ぎて釉薬溶融時に脱水が起ることが分る。この
結果から釉薬をゾノトライト系軽量珪酸カルシウム水和
物成形体に直接施す場合は、釉薬の軟化点は高いものを
選び、脱水が完了してから釉薬を熔融するように焼成す
る必要があることが分る。 Table 1 shows that in Experiment No. 3, rapid dehydration occurred at a holding temperature of 770 ° C. in Experiment No. 3, and in Experiment No. 4, the remaining dehydration occurred at the stage where the holding time was too short to melt the glaze. At .5, the holding temperature is too low, and dehydration occurs when the glaze melts. From this result, when applying the glaze directly to the zonotrite-based lightweight calcium silicate hydrate compact, it is necessary to select a glaze with a high softening point, and after dehydration is completed, it is necessary to bake so that the glaze is melted. I understand.
本発明により軽量の施釉セラミックス製品を初めて得
ることができた。この製品は断熱性に優れ、又加工も容
易であり、建築用壁材、床材など断熱性、施工性を要す
る用途への適用が期待できる。又、釉薬の選択により美
観に優れたセラミックス製品とすることもできる。According to the present invention, a lightweight glazed ceramic product can be obtained for the first time. This product is excellent in heat insulation and easy to process, and can be expected to be applied to applications requiring heat insulation and workability, such as building wall materials and flooring materials. Further, by selecting the glaze, it is possible to obtain a ceramic product having an excellent appearance.
フロントページの続き (56)参考文献 特開 昭59−69488（ＪＰ，Ａ) 特開 昭60−264378（ＪＰ，Ａ) 特開 昭62−90461（ＪＰ，Ａ) 特開 昭63−25283（ＪＰ，Ａ) 特開 平２−252675（ＪＰ，Ａ) 特開 昭63−239142（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) C04B 41/65 - 41/69 C04B 41/86Continuation of the front page (56) References JP-A-59-69488 (JP, A) JP-A-60-264378 (JP, A) JP-A-62-90461 (JP, A) JP-A-63-25283 (JP) JP-A-2-252675 (JP, A) JP-A-63-239142 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) C04B 41/65-41/69 C04B 41/86
Claims (3)
比が0.01〜0.04であり、ワラストナイトの生成率が全体
量の35重量％以上とされ、嵩比重が0.3〜1.0であるワラ
ストナイト系軽量珪酸カルシウム成形体の表面に釉薬の
熔融被膜を有する施釉軽量セラミックス製品。1. A CaO / SiO 2 molar ratio of 0.8 to 1.1, an Al / Si + Al atomic ratio of 0.01 to 0.04, a wollastonite formation rate of 35% by weight or more of the total amount, and a bulk specific gravity of 0.3 to A glazed lightweight ceramic product with a glaze coated on the surface of a wollastonite-based lightweight calcium silicate molded product of 1.0.
含んだ石灰質原料粉末とを、CaO/SiO2モル比が0.8〜1.1
でかつ全原料中に含有するAl2O3とSiO2とから求めたAl/
Si＋Al原子比が0.01〜0.04となるように混合し、該混合
物に水を加え、更に気泡を含有せしめたスラリーを調製
し、これを型枠に注入して硬化させるか、又は該混合物
に金属アルミニウム粉と水を加えてスラリーとし、これ
を型枠に注入して発泡硬化させた後、ゾノトライトの生
成率が全体量の35重量％以上となるまで190〜240℃の温
度で水蒸気養生し、得られたゾノトライト系軽量珪酸カ
ルシウム水和物成形体を700℃以上の温度で加熱脱水し
てワラストナイト系軽量珪酸カルシウム成形体とし、こ
の成形体に釉薬を施し、加熱して釉薬を熔融後、300℃
／時以下の速度で冷却することを特徴とする施釉軽量セ
ラミックス製品の製造方法。2. A method according to claim 1, wherein the siliceous raw material powder and the calcareous raw material powder containing Portland cement have a CaO / SiO 2 molar ratio of 0.8 to 1.1.
And Al / O determined from Al 2 O 3 and SiO 2 contained in all raw materials
Mixing is performed so that the Si + Al atomic ratio is 0.01 to 0.04, water is added to the mixture, and a slurry containing air bubbles is prepared. The slurry is poured into a mold and cured, or the mixture is mixed with metallic aluminum. Powder and water are added to form a slurry, which is poured into a mold and foam-hardened, and then steam-cured at a temperature of 190 to 240 ° C. until the zonotlite generation rate becomes 35% by weight or more of the whole amount, and the obtained The obtained zonotorite-based lightweight calcium silicate hydrate compact was heated and dehydrated at a temperature of 700 ° C. or more to give a wollastonite-based lightweight calcium silicate compact, which was glazed, heated and melted, 300 ℃
A method for producing a glazed lightweight ceramic product, characterized in that the product is cooled at a rate not more than / h.
含んだ石灰質原料粉末を、CaO/SiO2モル比が0.8〜1.1で
かつ全原料中に含有するAl2O3とSiO2とから求めたAl/Si
＋Al原子比が0.01〜0.04となるように混合し、該混合物
に水を加え、更に気泡を含有せしめたスラリーを調製
し、これを型枠に注入して硬化させるか、又は該混合物
に金属アルミニウム粉と水を加えてスラリーとし、これ
を型枠に注入して発泡硬化させた後、ゾノトライトの生
成率が全体量の35重量％以上となるまで190〜240℃の温
度で水蒸気養生し、得られたゾノトライト系軽量珪酸カ
ルシウム水和物成形体に軟化点が760℃以上の釉薬を施
し、670〜760℃に昇温して0.5〜10時間その温度を維持
し、次いで更に昇温して釉薬を熔融後、300℃／時以下
の速度で冷却することを特徴とする施釉軽量セラミック
ス製品の製造方法。3. A calcareous raw material powder containing a siliceous raw material powder and Portland cement, wherein the molar ratio of CaO / SiO 2 is 0.8 to 1.1 and Al is obtained from Al 2 O 3 and SiO 2 contained in all raw materials. / Si
+ Al atomic ratio is adjusted to be 0.01 to 0.04, water is added to the mixture, and a slurry containing air bubbles is prepared, and the slurry is poured into a mold to be cured, or the mixture is mixed with metallic aluminum. Powder and water are added to form a slurry, which is poured into a mold and foam-hardened, and then steam-cured at a temperature of 190 to 240 ° C. until the zonotlite generation rate becomes 35% by weight or more of the whole amount, and the obtained A glaze having a softening point of 760 ° C or more is applied to the obtained zonotolite-based lightweight calcium silicate hydrate compact, the temperature is raised to 670 to 760 ° C, and the temperature is maintained for 0.5 to 10 hours. And then cooling at a rate of 300 ° C./hour or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1303364A JP2813391B2 (en) | 1989-11-24 | 1989-11-24 | Glazed lightweight ceramic product and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1303364A JP2813391B2 (en) | 1989-11-24 | 1989-11-24 | Glazed lightweight ceramic product and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03164483A JPH03164483A (en) | 1991-07-16 |
| JP2813391B2 true JP2813391B2 (en) | 1998-10-22 |
Family
ID=17920102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1303364A Expired - Fee Related JP2813391B2 (en) | 1989-11-24 | 1989-11-24 | Glazed lightweight ceramic product and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2813391B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1007523A3 (en) * | 1993-10-11 | 1995-07-25 | Jules Guerin | Concrete object and process for manufacturing this object |
| CN111423198A (en) * | 2020-04-02 | 2020-07-17 | 美钢联工程技术股份有限公司 | Coal gangue ceramsite and preparation method thereof |
-
1989
- 1989-11-24 JP JP1303364A patent/JP2813391B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03164483A (en) | 1991-07-16 |
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