JP2007230852A - Tile and method of producing the same - Google Patents
Tile and method of producing the same Download PDFInfo
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- JP2007230852A JP2007230852A JP2006058079A JP2006058079A JP2007230852A JP 2007230852 A JP2007230852 A JP 2007230852A JP 2006058079 A JP2006058079 A JP 2006058079A JP 2006058079 A JP2006058079 A JP 2006058079A JP 2007230852 A JP2007230852 A JP 2007230852A
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Abstract
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本発明は、タイル及びその製造方法に係り、特に熱膨張係数が小さく、且つ給水率も低いタイルと、その製造方法に関する。 The present invention relates to a tile and a method for manufacturing the tile, and more particularly to a tile having a small coefficient of thermal expansion and a low water supply rate, and a method for manufacturing the tile.
タイルの熱膨張係数を小さくすることにより、タイル製造工程(特に、焼成工程の降温過程)での切れ(亀裂)発生が防止される。また、タイルの焼き締まりを良くすることにより、吸水性が小さくなり、高強度、高耐候性となる。 By reducing the coefficient of thermal expansion of the tile, the occurrence of breaks (cracks) in the tile manufacturing process (particularly, the temperature lowering process of the firing process) is prevented. In addition, by improving the tightness of tiles, water absorption is reduced, and high strength and high weather resistance are achieved.
従来の低熱膨張係数のタイルとしては、特開平5−124847号のものがある。
上記特開平5−124847号の実施例4、比較例8には、573℃付近の熱膨張係数がそれぞれ80×10−7/℃、74×10−7/℃のタイルが記載されている。しかしながら、これらのタイルは吸水率が2.6%、3.6%と高い。 In Example 4 and Comparative Example 8 of JP-A-5-124847, tiles having thermal expansion coefficients around 573 ° C. of 80 × 10 −7 / ° C. and 74 × 10 −7 / ° C. are described, respectively. However, these tiles have a high water absorption rate of 2.6% and 3.6%.
本発明は、熱膨張係数が小さく且つ吸水率も低いタイルと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 provide a tile having a low coefficient of thermal expansion and a low water absorption rate, and a method for manufacturing the tile.
請求項1のタイルは、
SiO2 69〜75重量%
Al2O3 15.8〜23重量%
Na2O+K2O 4.7〜5.2重量%
を含み、SiO2+Al2O3+Na2O+K2Oが95重量%以上であり、最大熱膨張係数が7.9×10−6/℃以下であることを特徴とするものである。
The tile of claim 1
SiO 2 69~75 weight%
Al 2 O 3 15.8-23% by weight
Na 2 O + K 2 O 4.7~5.2 wt%
SiO 2 + Al 2 O 3 + Na 2 O + K 2 O is 95 wt% or more, and the maximum thermal expansion coefficient is 7.9 × 10 −6 / ° C. or less.
請求項2のタイルは、請求項1において、1辺が300mm以上の大形タイルであることを特徴とするものである。 The tile according to claim 2 is the large tile according to claim 1, which is a large tile having one side of 300 mm or more.
請求項3のタイルの製造方法は、タイル原料の調合物を成形し、焼成することにより、請求項1又は2に記載のタイルを製造する方法であって、該調合物中のα石英の含有率が33.0重量%以下であることを特徴とするものである。 The method for producing a tile according to claim 3 is a method for producing the tile according to claim 1 or 2 by forming and firing a preparation of a tile raw material, and the inclusion of α-quartz in the preparation The rate is 33.0% by weight or less.
一般に、タイルは、焼成過程で石英が相転移し、500〜600℃付近で熱膨張係数が大きくなる。本発明のタイル及びその製造方法は、α石英含有率の少ない原料を用いて製造されるものであり、最大熱膨張係数が小さく、切れが防止され、製造歩留りが高い。本発明は、1辺が300mm以上(例えば300〜1000mm、特に600〜1000mm)の大形タイルに適用するのに好適である。また、本発明のタイルは、Na2OとK2Oを所定量含有しており、十分に焼き締まるため、吸水率が低く、高強度で且つ高耐候性を有する。 In general, in a tile, quartz undergoes a phase transition in the firing process, and a thermal expansion coefficient increases around 500 to 600 ° C. The tile of the present invention and the method for manufacturing the tile are manufactured using a raw material having a low α quartz content, have a small maximum thermal expansion coefficient, prevent cutting, and have a high manufacturing yield. The present invention is suitable for application to a large tile having a side of 300 mm or more (for example, 300 to 1000 mm, particularly 600 to 1000 mm). Further, the tile of the present invention contains a predetermined amount of Na 2 O and K 2 O, and is sufficiently baked, so that it has a low water absorption rate, high strength, and high weather resistance.
以下、本発明についてさらに詳細に説明する。 Hereinafter, the present invention will be described in more detail.
本発明のタイルを製造する原料としては、長石、粘土、カオリンなどの天然原料のほかに、廃ガラス(例えばブラウン管の廃ガラス)をNa2O、K2O源として用いる。本発明では、これらの原料(特に天然原料)として、なるべくα石英の含有率の低いものを用い、調合物中のα石英の含有率が33.0重量%以下、特に30.0重量%以下となるようにするのが好ましい。なお、カオリンの少なくとも一部として、水ひ(elutriation)により精製してα石英含有率を低下させた高純度品を用いるのが好ましい。これにより、最大熱膨張係数を7.9×10−6/℃以下好ましくは6.0×10−6〜7.5×10−6/℃とすることができる。 In addition to natural raw materials such as feldspar, clay and kaolin, waste glass (for example, CRT waste glass) is used as a source of Na 2 O and K 2 O as a raw material for producing the tile of the present invention. In the present invention, as these raw materials (particularly natural raw materials), those having as low a quartz content as possible are used, and the content of α quartz in the preparation is 33.0% by weight or less, particularly 30.0% by weight or less. It is preferable that As at least a part of kaolin, it is preferable to use a high-purity product that has been purified by elutriation to reduce the α-quartz content. Thereby, the maximum thermal expansion coefficient can be 7.9 × 10 −6 / ° C. or less, preferably 6.0 × 10 −6 to 7.5 × 10 −6 / ° C.
好適な調合例を次に示す。
長石 50〜60重量部
カオリン 15〜25重量部
粘土 15〜25重量部
廃ブラウン管ガラス 5〜15重量部
A suitable formulation example is shown below.
Feldspar 50-60 parts Kaolin 15-25 parts Clay 15-25 parts Waste CRT glass 5-15 parts
本発明では、上記調合物を成形し、焼成することによりタイルを製造する。この焼成後におけるタイルの化学組成は、
SiO2 69〜75重量%、好ましくは69〜73重量%
Al2O3 15.8〜23重量%、好ましくは20〜23重量%
Na2O+K2O 4.7〜5.2重量%、好ましくは4.8〜5.1重量%
であり、SiO2+Al2O3+Na2O+K2Oは95重量%以上好ましくは96重量%とする。
In this invention, a tile is manufactured by shape | molding the said formulation and baking. The chemical composition of the tile after firing is
SiO 2 69-75 wt%, preferably 69-73 wt%
Al 2 O 3 15.8-23 wt%, preferably 20-23 wt%
Na 2 O + K 2 O 4.7~5.2 wt%, preferably from 4.8 to 5.1 wt%
SiO 2 + Al 2 O 3 + Na 2 O + K 2 O is 95% by weight or more, preferably 96% by weight.
なお、Al2O3が15.8重量%よりも少ないと、タイルの熱膨張係数が大きくなり易い。また、Al2O3が23重量%よりも多いと、タイルの耐凍害性が低下する。Na2OとK2Oとの合量が4.7重量%よりも少ないと、焼き締まりが悪くなり、吸水性が高く、強度及び耐候性に劣るものとなる。逆に、Na2OとK2Oとの合量が5.2重量%よりも多いと、焼ぶくれが起きタイルとして機能しない。 Incidentally, when the Al 2 O 3 is less than 15.8 wt%, easily the thermal expansion coefficient of tiles increases. Further, when the Al 2 O 3 is more than 23 wt%, frost resistance of the tile is reduced. When the total amount of Na 2 O and K 2 O is less than 4.7% by weight, the shrinkage is worsened, the water absorption is high, and the strength and weather resistance are inferior. Conversely, if the total amount of Na 2 O and K 2 O is more than 5.2% by weight, blistering occurs and the tile does not function.
なお、Na2Oは0.5〜2.0重量%特に1.0〜1.5重量%、K2Oは3.0〜4.5重量%特に3.5〜4.1重量%であることが好ましい。 Na 2 O is 0.5 to 2.0% by weight, particularly 1.0 to 1.5% by weight, and K 2 O is 3.0 to 4.5% by weight, particularly 3.5 to 4.1% by weight. Preferably there is.
SiO2、Al2O3、Na2O、K2O以外の成分としては、通常、TiO2、Fe2O3、CaO、MgOなどが不純物として存在する。 As components other than SiO 2 , Al 2 O 3 , Na 2 O, and K 2 O, TiO 2 , Fe 2 O 3 , CaO, MgO, and the like usually exist as impurities.
本発明では、上記割合の調合物を成形及び焼成してタイルを製造する。成形方法は、湿式、乾式のいずれでもよい。焼成はローラーハースキルンによるのが好ましく、焼成時間(キルンの入口〜出口)は40〜50分程度、焼成温度は1200〜1250℃程度が好適である。 In the present invention, a tile is produced by molding and firing the above-mentioned composition. The molding method may be either wet or dry. Firing is preferably performed by roller hearth kiln, and the firing time (kiln inlet to outlet) is preferably about 40 to 50 minutes, and the firing temperature is preferably about 1200 to 1250 ° C.
本発明では、上記の焼成の後、釉を掛けて釉焼きすることにより、内装用タイルが得られる。 In the present invention, an interior tile can be obtained by baking and baking after the above baking.
原料として、長石、高グレードのカオリン(α石英含有率3重量%)、低グレードのカオリン(α石英含有率66重量%)、高グレードの粘土(α石英含有率8重量%)、低グレードの粘土(α石英含有率40重量%)、廃ブラウン管ガラスを下記表1の割合で調合した。この調合物を、ポットミルで+45μmが3.0%に達するまで微粉砕し、乾燥し、6%加水後、造粒し、50tプレスで100×100×8mmに成形し、ローラーハースキルンで1230℃×45分にて焼成し、タイルとした。各タイルの成分と特性を表2に示す。なお、吸水率及び曲げ強度はJIS A52091994に従って測定した。 As raw materials, feldspar, high grade kaolin (α quartz content 3% by weight), low grade kaolin (α quartz content 66% by weight), high grade clay (α quartz content 8% by weight), low grade Clay (α quartz content 40% by weight) and waste CRT glass were prepared in the proportions shown in Table 1 below. This formulation is finely pulverized in a pot mill until +45 μm reaches 3.0%, dried, added with 6% water, granulated, formed into 100 × 100 × 8 mm with a 50 t press, and 1230 ° C. with a roller hearth kiln. X baked in 45 minutes to make a tile. Table 2 shows the components and characteristics of each tile. The water absorption and bending strength were measured according to JIS A5209 1994 .
表2より、本発明のタイルは、最大熱膨張係数が小さく、また吸水率も低く、曲げ強度も高いことが認められた。 From Table 2, it was confirmed that the tile of the present invention had a small maximum thermal expansion coefficient, a low water absorption, and a high bending strength.
Claims (3)
Al2O3 15.8〜23重量%
Na2O+K2O 4.7〜5.2重量%
を含み、SiO2+Al2O3+Na2O+K2Oが95重量%以上であり、
最大熱膨張係数が7.9×10−6/℃以下であることを特徴とするタイル。 SiO 2 69~75 weight%
Al 2 O 3 15.8-23% by weight
Na 2 O + K 2 O 4.7~5.2 wt%
SiO 2 + Al 2 O 3 + Na 2 O + K 2 O is 95% by weight or more,
A tile having a maximum thermal expansion coefficient of 7.9 × 10 −6 / ° C. or less.
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JP2006058079A JP2007230852A (en) | 2006-03-03 | 2006-03-03 | Tile and method of producing the same |
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JP2006058079A JP2007230852A (en) | 2006-03-03 | 2006-03-03 | Tile and method of producing the same |
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JP2007230852A true JP2007230852A (en) | 2007-09-13 |
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JP2006058079A Pending JP2007230852A (en) | 2006-03-03 | 2006-03-03 | Tile and method of producing the same |
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2006
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