JP4233222B2 - Manufacturing method of colored glass - Google Patents
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- JP4233222B2 JP4233222B2 JP2001008685A JP2001008685A JP4233222B2 JP 4233222 B2 JP4233222 B2 JP 4233222B2 JP 2001008685 A JP2001008685 A JP 2001008685A JP 2001008685 A JP2001008685 A JP 2001008685A JP 4233222 B2 JP4233222 B2 JP 4233222B2
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
- C03C1/10—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels to produce uniformly-coloured transparent products
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Description
【０００１】
【発明の属する技術分野】
本発明は、着色されたソーダ石灰系ガラスまたはカリウム系ガラスの製造方法に係り、特に三宅島火山灰を有効利用して優れた熱線吸収性を有し泡切れされマリンブルーのようにクリアな青色に着色されたソーダ石灰系ガラスまたはカリウム系ガラスの製造方法に関する。
【０００２】
【従来の技術】
一般に、ソーダ石灰系ガラスまたはカリウム系ガラスは、けい砂、ソーダ灰または炭酸カリウム及び石灰石に、水酸化アルミニウム、Ａｓ２Ｏ３やＳｂ２Ｏ３などの清澄剤、Ｆｅ、Ｃｏ等の金属イオンを着色剤として加え溶融、成形するものである。
【０００３】
【発明が解決しようとする課題】
従来、泡切れされ青色系に着色されたソーダ石灰系ガラスまたはカリウム系ガラスの製造では、けい砂、ソーダ灰、石灰石に、水酸化アルミニウム、清澄剤、着色剤を加えているものであるが、本発明は、三宅島火山灰をガラス原料として有効利用することにより、従来のように水酸化アルミニウム、清澄剤及び着色剤を配合することなく、泡切れされ青色系に着色されたソーダ石灰系ガラスまたはカリウム系ガラスの製造方法を提供することを目的とする。
【０００４】
【課題を解決するための手段】
本発明は、上記課題を解決するためのもので、
原料としてけい砂、ソーダ灰または炭酸カリウム、石灰石を配合し溶融するソーダ石灰系ガラスまたはカリウム系ガラスの製造方法において、前記けい砂、ソーダ灰または炭酸カリウム、石灰石の原料を重量で１００部に、アノーサイト（ＣａＯ・Ａｌ２Ｏ３・２ＳｉＯ２）、無水石膏（ＣａＳＯ４）、二水石膏（ＣａＳＯ４・２Ｈ２Ｏ）、磁鉄鉱（Ｆｅ３Ｏ４）、石英（ＳｉＯ２）、クリストバライト（ＳｉＯ２）を含み、その主な組成を酸化物として換算すると、
ＳｉＯ２：４０〜５５重量％、
Ａｌ２Ｏ３：１４〜１９重量％、
Ｎａ２Ｏ：１〜５重量％、
Ｋ２Ｏ：０〜３重量％、
ＣａＯ：６〜１２重量％、
ＭｇＯ：２〜７重量％、
Ｆｅ２Ｏ３：８〜１３重量％、
ＳＯ３：２〜１５重量％
を含む０．５ｍｍ以下の微細な三宅島火山灰を重量で６〜１５部配合して、ルツボを用い還元雰囲気で溶融して、成形することを特徴とする優れた熱線吸収性を有し泡切れされマリンブルーのようにクリアな青色に着色されたガラスの製造方法である。
【０００６】
【作用】
本発明は、ソーダ石灰系ガラスの製造方法において、けい砂、ソーダ灰、石灰石等の原料を重量で１００部に、さらに三宅島火山灰を重量で６〜１５部配合して、還元雰囲気で溶融、成形、徐冷することにより、優れた熱線吸収性を有し泡切れされマリンブルーのようにクリアな青色に着色されたソーダ石灰系ガラスを得ることができるものである。またカリウム系ガラスの製造方法において、けい砂、炭酸カリウム、石灰石等の原料を重量で１００部に、さらに三宅島火山灰を重量で６〜１５部配合して、還元雰囲気で溶融、成形、徐冷することにより、優れた熱線吸収性を有し泡切れされマリンブルーのようにクリアな青色に着色されたソーダ石灰系ガラスを得ることができるものである。
【０００７】
本発明において用いる三宅島火山灰は、アノーサイト（ＣａＯ・Ａｌ２Ｏ３・２ＳｉＯ２）、無水石膏（ＣａＳＯ４）、二水石膏（ＣａＳＯ４・２Ｈ２Ｏ）、磁鉄鉱（Ｆｅ３Ｏ４）、石英（ＳｉＯ２）、クリストバライト（ＳｉＯ２）を含むもので、その主な組成を酸化物として換算すると、
ＳｉＯ２：４０〜５５重量％、
Ａｌ２Ｏ３：１４〜１９重量％、
Ｎａ２Ｏ：１〜５重量％、
Ｋ２Ｏ：０〜３重量％、
ＣａＯ：６〜１２重量％、
ＭｇＯ：２〜７重量％、
Ｆｅ２Ｏ３：８〜１３重量％、
ＳＯ３：２〜１５重量％を含むものである。
具体的には、上記の主な組成に、さらに、
ＴｉＯ２：０〜３重量％、
ＭｎＯ：０〜２重量％、
Ｃｌ：０〜１重量％、
Ｐ２Ｏ５：０〜２重量％、
Ｖ２Ｏ５：０〜１重量％、
Ｃｒ２Ｏ３：０〜０．０５重量％、
Ｃｏ２Ｏ３：０〜０．０５重量％、
ＣｕＯ：０〜１重量％、
ＺｎＯ：０〜０．０５重量％、
ＳｒＯ：０〜１重量％、
ＺｒＯ２：０〜０．０５重量％
を含んでいるものである。
なお、三宅島火山灰では、鉄分は磁鉄鉱（Ｆｅ３Ｏ４）の形で含まれているが、その量をＦｅ２Ｏ３に換算して示した。
三宅島火山灰の特徴は、各地の火山灰と比較して鉄分が磁鉄鉱（Ｆｅ３Ｏ４）の形で存在すること、ＣａＳＯ４が多く含まれていることである。
【０００８】
ガラスの製造において各地の火山灰を用いる試みがなされているが、三宅島火山灰には鉄がＦｅ３Ｏ４の形で存在しており、火山灰による還元性が強く、これを還元性雰囲気で溶融することにより、ソーダ石灰系ガラスやカリウム系ガラス中で鉄がＦｅ２＋の状態になっているため、けい砂、ソーダ灰または炭酸カリウム、石灰石の原料を重量で１００部に、三宅島火山灰を重量で６〜１５部配合することによりマリンブルーのようにクリアな青色に着色される。
三宅島火山灰が重量で１〜５部の配合では薄水色、６〜１５部の配合では青色、１６〜４０部の配合では青緑色、４１〜７０部の配合では暗緑色、７１〜１００部の配合では黒色に近い暗緑色に着色される。特に６〜１５部の配合で得られる青色はマリンブルーのようにクリアな青色の発色のものである。
三宅島火山灰が重量で１部未満ではほとんど着色されない。また１００部を超えると青色系の着色が得られなくなる。
【０００９】
また三宅島火山灰には、ＣａＳＯ４が含まれており、これがガラス化の際に分解することによって発生する気体が、ガラス中の小さい泡をとり込むことによって脱泡するため、泡切れされたソーダ石灰系ガラス、カリウム系ガラスが製造される。
また製造されたソーダ石灰系ガラス、カリウム系ガラス中に三宅島火山灰の鉄などが存在するために赤外線吸収の特性、すなわち優れた熱線吸収性を有しているものである。
さらに、三宅島火山灰には、ソーダ石灰系ガラスやカリウム系ガラスの原料であるけい砂、ソーダ灰、炭酸カルシウム、水酸化アルミニウムに相当する成分も含まれており、原料としてのけい砂、ソーダ灰、炭酸カルシウムの使用量を低減できものである。
このように、三宅島火山灰を重量で６〜１５部配合することにより、水酸化アルミニウム、清澄剤、着色剤等を使用することなく、泡切れされマリンブルーのようにクリアな青色に着色されたソーダ石灰系ガラスやカリウム系ガラスを製造できる。
【００１０】
【発明の実施の形態】
本発明によるソーダ石灰系ガラスは、例えば、
ＳｉＯ２：５５〜７５重量％、
Ａｌ２Ｏ３：０．５〜８重量％、
ＣａＯ：５〜１５重量％、
ＭｇＯ：０．５〜４重量％、
Ｎａ２Ｏ：１０〜２０重量％
で、いわゆる通常のソーダ石灰系ガラスの範囲とするものであり、このようなガラス組成を目標とし、原料としてけい砂、ソーダ灰、石灰石の原料１００部に、三宅島火山灰を６〜１５部配合する。
また本発明によるカリウム系ガラスは、ソーダ石灰系ガラスのナトリウムの全部または一部をカリウムで置き換えたもので、例えば、
ＳｉＯ２：５５〜７５重量％
Ａｌ２Ｏ３：０．５〜８重量％
Ｋ２Ｏ：５〜２０重量％
ＣａＯ：５〜１５重量％
ＭｇＯ：０．５〜４重量％、
Ｎａ２Ｏ：０〜１５重量％
で、いわゆる通常のカリウム系ガラスの範囲のもので、このようなガラス組成を目標とし、原料としてけい砂、炭酸カリウム、石灰石の原料１００部に、三宅島火山灰を重量で６〜１５部配合する。
三宅島火山灰は微粉末で、ほとんどが０．５ｍｍ以下の微細なものであり、特別の処理をすることなく堆積しているものをそのまま用いる。なお水分や火山灰以外のものが混っている場合には除去してから用いる。
【００１１】
このように、けい砂、ソーダ灰または炭酸カリウム、石灰石の原料を重量で１００部に、三宅島火山灰を重量で６〜１５部配合して、還元雰囲気で溶融する。例えばルツボに蓋をし、酸素を遮断した状態で溶融する。成形は、例えば宙吹き、型吹き、型押し、ロール法によりおこなうことができる。本発明のけい砂、ソーダ灰または炭酸カリウム、石灰石の原料を重量で１００部に、三宅島火山灰を重量で６〜１５部配合したものの粘性、成形性は、通常のソーダ石灰系ガラスやカリウム系ガラスと同様のものであった。
また成形後、徐冷し、必要に応じて加工を行う。
【００１２】
【実施例】
本発明の実施例について、表１、図１を参照して説明する。
【表１】
表１は実施例（Ｎｏ．３、Ｎｏ．４）並びに参考例（Ｎｏ．１、２及びＮｏ．５〜７）のソーダ石灰系ガラスの配合を示したものである。
図１は、分光特性を示したものである。
表１に示す、三宅島火山灰、原料部の珪砂粉、ソーダ灰、石灰石、水酸化アルミニウムの配合量の単位はｇである。原料部１００部に対する三宅島火山灰の割合（部）は、原料部の珪砂粉、ソーダ灰、石灰石、水酸化アルミニウムの重量を１００部として、三宅島火山灰が重量で配合されている割合（部）を示したものである。
三宅島火山灰は、０．５ｍｍ以下の微細なものである。また珪砂粉は１５０〜２００メッシュのものを用いた。
表１の参考例のＮｏ．１は原料部１００部に三宅島火山灰の割合１．２部配合したもので薄水色、参考例のＮｏ．２は原料部１００部に三宅島火山灰の割合２．４部配合したもので薄水色、実施例のＮｏ．３は原料部１００部に三宅島火山灰の割合６．５部配合したもので青色、また実施例のＮｏ．４は原料部１００部に三宅島火山灰の割合１０．１部配合したもので青色であった。参考例のＮｏ．５は原料部１００部に三宅島火山灰の割合２３．６部配合したもので青緑色、参考例のＮｏ．６は原料部１００部に三宅島火山灰の割合３６．４部配合したもので青緑色であった。参考例のＮｏ．７は原料部１００部に三宅島火山灰の割合５５．６部配合したもので暗緑色であった。
また、これらは三宅島火山灰に含まれてているＣａＳＯ４により泡切れがなされているもので、特に実施例のＮｏ．３，４は完全に泡切れされていた。
【００１４】
また、実施例のソーダ石灰系ガラスの物理的特性は、Ｎｏ．３の原料部１００部に三宅島火山灰の割合６．５部配合したものでは線膨脹係数：１００×１０−７／℃（４０〜４００℃）、転移点５５７℃、屈伏点６０９℃であり、Ｎｏ．４の原料部１００部に三宅島火山灰の割合１０．１部配合したものでは線膨脹係数：１０１．５×１０−７／℃（４０〜４００℃）、転移点５５５℃、屈伏点６０６℃であった。
このソーダ石灰系ガラスの物理的特性は、通常のソーダ石灰系ガラスと同等のものであった。
【００１５】
図１は分光特性を示したもので、横軸が波長（ｎｍ）、縦軸が透過率（％）である。本発明例の表１Ｎｏ．３に示した配合のガラスの分光特性（１）、市販のフロート板ガラス（ソーダ石灰系ガラス）の分光特性（３）、熱線吸収のガラス（ソーダ石灰系ガラスでＦｅイオンを含有させたもの）の分光特性（２）として記載した。
図１の分光特性（１）〜（３）に示すように、波長３２０ｎｍ以下では、いずれも透過率０％であるが、波長の長い領域では、本発明例のガラスの分光特性（１）は、フロート板ガラスの分光特性（３）、熱線吸収ガラスの分光特性（２）よりも透過率（％）が低くなっている。波長８００ｎｍ以上の赤外線領域で、特にフロート板ガラスの分光特性（３）、熱線吸収のガラスの分光特性（２）よりも優れた特性を示している。これは本発明例の表１Ｎｏ．３に示した配合のソーダ石灰系ガラス中に三宅島火山灰の鉄などが存在するために赤外線領域で優れた吸収特性、すなわち優れた熱線吸収性を有していることを示しているものである。
【００１６】
【発明の効果】
以上説明したように、本発明によれば、けい砂、ソーダ灰、石灰石等の原料１００部に、さらに０．５ｍｍ以下の微細な三宅島火山灰を重量で６〜１５部配合して、ルツボを用いて還元雰囲気で溶融、成形、徐冷することにより優れた熱線吸収性を有し泡切れされマリンブルーのようにクリアな青色に着色されたソーダ石灰系ガラスまたはカリウム系ガラスを得ることができるという効果を有し、三宅島火山灰を原料に配合することにより、けい砂、ソーダ灰、炭酸カルシウムの使用量を低減でき、水酸化アルミニウム、清澄剤、着色剤等を使用することなく、泡のない高品質のマリンブルーのようにクリアな青色に着色ガラスを安価に製造できるという効果を奏するものである。
【図面の簡単な説明】
【図１】 分光特性を示した図[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing colored soda-lime glass or potassium-based glass, and in particular, effectively uses Miyakejima volcanic ash and has excellent heat ray absorption and is blown out and colored in a clear blue color like marine blue. The present invention relates to a method for producing a soda-lime glass or potassium glass.
[0002]
[Prior art]
In general, soda-lime glass or potassium-based glass is made of silica sand, soda ash, potassium carbonate and limestone with a clarifier such as aluminum hydroxide, As 2 O 3 or Sb 2 O 3, and metal ions such as Fe and Co. It is melted and molded as a colorant.
[0003]
[Problems to be solved by the invention]
Conventionally, in the production of soda-lime-based glass or potassium-based glass that has been boiled and colored in blue color, aluminum hydroxide, clarifier, and colorant are added to silica sand, soda ash, and limestone, The present invention makes effective use of Miyakejima volcanic ash as a raw material for glass, soda-lime-based glass or potassium that is blown out and colored blue without mixing aluminum hydroxide, a refining agent, and a coloring agent as in the past. An object of the present invention is to provide a method for producing a glass.
[0004]
[Means for Solving the Problems]
The present invention is for solving the above-mentioned problems,
In the method for producing soda-lime glass or potassium-based glass in which silica sand, soda ash or potassium carbonate, limestone is blended and melted as a raw material, the silica sand, soda ash or potassium carbonate, limestone raw material is 100 parts by weight, Anorthite (CaO.Al 2 O 3 .2SiO 2 ), anhydrous gypsum (CaSO 4 ), dihydrate gypsum (CaSO 4 .2H 2 O), magnetite (Fe 3 O 4 ), quartz (SiO 2 ), cristobalite (SiO 2 ) 2 ), and when the main composition is converted as an oxide,
Al 2 O 3 : 14 to 19% by weight,
Na 2 O: 1 to 5% by weight,
K 2 O: 0~3% by weight,
CaO: 6-12% by weight,
MgO: 2 to 7% by weight,
Fe 2 O 3 : 8 to 13% by weight,
SO 3 : 2 to 15% by weight
It has excellent heat ray absorptivity, characterized by blending 6-15 parts by weight of fine Miyakejima volcanic ash containing 0.5 to 5 parts in weight, melting in a reducing atmosphere using a crucible, and molding. This is a method for producing a glass colored in a clear blue like marine blue.
[0006]
[Action]
The present invention is a method for producing soda-lime glass, wherein 100 parts by weight of raw materials such as silica sand, soda ash, limestone and the like and 6 to 15 parts by weight of Miyakejima volcanic ash are blended and melted and molded in a reducing atmosphere. By slowly cooling, a soda-lime-based glass having excellent heat ray absorptivity and blown out of bubbles and colored in a clear blue like marine blue can be obtained. In addition, in the method for producing potassium glass, raw materials such as silica sand, potassium carbonate, limestone and the like are blended in 100 parts by weight, and Miyakejima volcanic ash is blended in 6 to 15 parts by weight, and melted, molded, and slowly cooled in a reducing atmosphere. By so doing, it is possible to obtain a soda-lime-based glass having excellent heat ray absorptivity and blown out of bubbles and colored in a clear blue color like marine blue.
[0007]
Miyakejima volcanic ash used in the present invention includes anorthite (CaO.Al 2 O 3 .2SiO 2 ), anhydrous gypsum (CaSO 4 ), dihydrate gypsum (CaSO 4 .2H 2 O), magnetite (Fe 3 O 4 ), quartz (SiO 2 ), including cristobalite (SiO 2 ), and converting the main composition as an oxide,
Al 2 O 3 : 14 to 19% by weight,
Na 2 O: 1 to 5% by weight,
K 2 O: 0~3% by weight,
CaO: 6-12% by weight,
MgO: 2 to 7% by weight,
Fe 2 O 3 : 8 to 13% by weight,
SO 3 : Contains 2 to 15% by weight.
Specifically, in addition to the above main composition,
TiO 2 : 0 to 3% by weight,
MnO: 0 to 2% by weight,
Cl: 0 to 1% by weight,
P 2 O 5 : 0 to 2% by weight,
V 2 O 5 : 0 to 1% by weight,
Cr 2 O 3 : 0 to 0.05% by weight,
Co 2 O 3 : 0 to 0.05% by weight,
CuO: 0 to 1% by weight,
ZnO: 0 to 0.05% by weight,
SrO: 0 to 1% by weight,
ZrO 2 : 0 to 0.05% by weight
Is included.
In Miyakejima volcanic ash, iron is contained in the form of magnetite (Fe 3 O 4 ), but the amount is shown as converted to Fe 2 O 3 .
The Miyakejima volcanic ash is characterized by the presence of iron in the form of magnetite (Fe 3 O 4 ) and a large amount of CaSO 4 compared to volcanic ash in various places.
[0008]
Attempts have been made to use volcanic ash from various locations in the production of glass, but iron is present in the form of Fe 3 O 4 in Miyakejima volcanic ash, which is highly reducible by volcanic ash and must be melted in a reducing atmosphere. Therefore, since iron is in a Fe 2+ state in soda-lime glass or potassium glass, silica sand, soda ash or potassium carbonate, limestone raw material is 100 parts by weight, and Miyakejima volcanic ash is 6- By blending 15 parts, it becomes a clear blue color like marine blue.
Miyakejima volcanic ash is light blue when mixed with 1 to 5 parts by weight, blue when mixed with 6 to 15 parts, blue green when mixed with 16 to 40 parts, dark green when mixed with 41 to 70 parts, and mixed with 71 to 100 parts In, it is colored dark green close to black. In particular, the blue color obtained by blending 6 to 15 parts is a clear blue color like marine blue.
Miyakejima volcanic ash is hardly colored when it is less than 1 part by weight. If it exceeds 100 parts, blue coloration cannot be obtained.
[0009]
In addition, Miyakejima volcanic ash contains CaSO 4 and the gas generated when it decomposes during vitrification defoams by taking in small bubbles in the glass. Glass and potassium glass are produced.
Moreover, since iron of Miyakejima volcanic ash etc. exists in manufactured soda-lime-type glass and potassium-type glass, it has the infrared absorption characteristic, ie, the outstanding heat ray absorptivity.
In addition, Miyakejima volcanic ash contains components corresponding to silica sand, soda ash, calcium carbonate, and aluminum hydroxide, which are raw materials for soda lime glass and potassium glass, and silica sand, soda ash, The amount of calcium carbonate used can be reduced.
Thus, by blending 6 to 15 parts by weight of Miyakejima volcanic ash, soda that is blown out and colored in a clear blue like marine blue without using aluminum hydroxide, refining agent, colorant, etc. Lime glass or potassium glass can be produced.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The soda-lime glass according to the present invention is, for example,
SiO 2: 55~75% by weight,
Al 2 O 3: 0.5~8 wt%,
CaO: 5 to 15% by weight,
MgO: 0.5-4% by weight,
Na 2 O: 10 to 20% by weight
Therefore, the range of so-called ordinary soda-lime glass is set, and 6-15 parts of Miyakejima volcanic ash is blended with 100 parts of raw materials of silica sand, soda ash, and limestone as raw materials, with such a glass composition as a target. .
Further, the potassium glass according to the present invention is one in which all or part of sodium in soda lime glass is replaced with potassium.
SiO 2: 55~75 weight%
Al 2 O 3 : 0.5 to 8% by weight
K 2 O: 5~20 weight%
CaO: 5 to 15% by weight
MgO: 0.5-4% by weight,
Na 2 O: 0 to 15% by weight
In the range of so-called normal potassium-based glass, 6-15 parts by weight of Miyakejima volcanic ash is blended with 100 parts of raw materials of silica sand, potassium carbonate, and limestone as a raw material with such a glass composition as a target.
Miyakejima volcanic ash is fine powder, most of which is 0.5 mm or less, and is used as it is without any special treatment. If anything other than moisture or volcanic ash is mixed, remove it before use.
[0011]
Thus, silica sand, soda ash or potassium carbonate, limestone raw material is blended in 100 parts by weight and Miyakejima volcanic ash is blended in 6-15 parts by weight, and melted in a reducing atmosphere. For example, a crucible is covered and melted in a state where oxygen is blocked. The molding can be performed, for example, by air blowing, die blowing, die pressing, or a roll method. Viscosity and formability of silica sand, soda ash or potassium carbonate, limestone raw material in 100 parts by weight and Miyakejima volcanic ash in 6 to 15 parts by weight are ordinary soda lime glass and potassium glass. It was similar.
In addition, after molding, it is gradually cooled and processed as necessary.
[0012]
【Example】
Examples of the present invention will be described with reference to Table 1 and FIG.
[Table 1]
Table 1 shows the composition of the soda-lime glass of Examples (No. 3, No. 4) and Reference Examples (No. 1, 2 and No. 5-7).
FIG. 1 shows the spectral characteristics.
The unit of the blending amount of Miyakejima volcanic ash, raw material part silica sand powder, soda ash, limestone, and aluminum hydroxide shown in Table 1 is g. The ratio (parts) of Miyakejima volcanic ash to 100 parts of raw material part shows the ratio (parts) of Miyakejima volcanic ash by weight, with the weight of silica sand powder, soda ash, limestone, and aluminum hydroxide in the raw material part being 100 parts. It is a thing.
Miyakejima volcanic ash is as fine as 0.5 mm or less. Moreover, the silica sand powder used the thing of 150-200 mesh.
No. of the reference example of Table 1. No. 1 is a blend of 1.2 parts of Miyakejima volcanic ash in 100 parts of the raw material part. No. 2 is a blend of 2.4 parts of Miyakejima volcanic ash in 100 parts of the raw material part. 3 is a mixture of 6.5 parts of Miyakejima volcanic ash in 100 parts of the raw material part, blue, and No. 3 in the examples. No. 4 was blue in which 100 parts of the raw material part was mixed with 10.1 parts of Miyakejima volcanic ash. Reference Example No. No. 5 is a blend of 23.6 parts of Miyakejima volcanic ash in 100 parts of the raw material part. No. 6 was blended with 36.4 parts of Miyakejima volcanic ash in 100 parts of the raw material part, and was blue-green. Reference Example No. 7 was blended with 55.6 parts of Miyakejima volcanic ash in 100 parts of the raw material part, and was dark green.
In addition, these are foamed out by CaSO 4 contained in Miyakejima volcanic ash. 3 and 4 were completely defoamed.
[0014]
In addition, the physical characteristics of the soda-lime glass of the examples are No. No. 3 raw material part with 100 parts Miyakejima volcanic ash ratio of 6.5 parts linear expansion coefficient: 100 × 10 −7 / ° C. (40-400 ° C.), transition point 557 ° C., yield point 609 ° C., No . When 100 parts of raw material part 4 was mixed with 10.1 parts of Miyakejima volcanic ash, the linear expansion coefficient was 101.5 × 10 −7 / ° C. (40 to 400 ° C.), the transition point was 555 ° C., and the yield point was 606 ° C. It was.
The physical characteristics of this soda-lime glass were equivalent to those of ordinary soda-lime glass.
[0015]
FIG. 1 shows spectral characteristics, where the horizontal axis represents wavelength (nm) and the vertical axis represents transmittance (%). Table 1 No. of the present invention example. Spectral characteristics (1) of glass having the composition shown in 3, spectral characteristics (3) of commercially available float plate glass (soda-lime glass), heat-absorbing glass (soda-lime glass containing Fe ions) It was described as spectral characteristics (2).
As shown in the spectral characteristics (1) to (3) of FIG. 1, the transmittance is 0% at a wavelength of 320 nm or less, but in the long wavelength region, the spectral characteristics (1) of the glass of the present invention example is The transmittance (%) is lower than the spectral characteristic (3) of the float plate glass and the spectral characteristic (2) of the heat ray absorbing glass. In the infrared region having a wavelength of 800 nm or more, it exhibits particularly superior characteristics to the spectral characteristics (3) of float glass and the spectral characteristics (2) of heat-absorbing glass. This is shown in Table 1 No. This indicates that the soda-lime glass of the composition shown in 3 has excellent absorption characteristics in the infrared region, that is, excellent heat ray absorption, because iron of Miyakejima volcanic ash is present.
[0016]
【The invention's effect】
As explained above, according to the present invention, the crucible is used by blending 6 to 15 parts by weight of fine Miyakejima volcanic ash of 0.5 mm or less with 100 parts of raw materials such as silica sand, soda ash and limestone. By melting, molding and slow cooling in a reducing atmosphere, it is possible to obtain soda-lime-based glass or potassium-based glass that has excellent heat ray absorption and is colored in a clear blue color like marine blue. By using Miyakejima volcanic ash as a raw material, the amount of silica sand, soda ash, and calcium carbonate can be reduced, and there is no foam without using aluminum hydroxide, refining agents, colorants, etc. The effect is that the colored glass can be manufactured at a low cost in a clear blue color like marine blue of quality.
[Brief description of the drawings]
FIG. 1 is a diagram showing spectral characteristics.
Claims (1)
ＳｉＯ２：４０〜５５重量％、
Ａｌ２Ｏ３：１４〜１９重量％、
Ｎａ２Ｏ：１〜５重量％、
Ｋ２Ｏ：０〜３重量％、
ＣａＯ：６〜１２重量％、
ＭｇＯ：２〜７重量％、
Ｆｅ２Ｏ３：８〜１３重量％、
ＳＯ３：２〜１５重量％
を含む０．５ｍｍ以下の微細な三宅島火山灰を重量で６〜１５部配合して、ルツボを用い還元雰囲気で溶融して、成形することを特徴とする優れた熱線吸収性を有し泡切れされマリンブルーのようにクリアな青色に着色されたガラスの製造方法。In the method for producing soda-lime glass or potassium-based glass in which silica sand, soda ash or potassium carbonate, limestone is blended and melted as a raw material, the silica sand, soda ash or potassium carbonate, limestone raw material is 100 parts by weight, Anorthite (CaO.Al 2 O 3 .2SiO 2 ), anhydrous gypsum (CaSO 4 ), dihydrate gypsum (CaSO 4 .2H 2 O), magnetite (Fe 3 O 4 ), quartz (SiO 2 ), cristobalite (SiO 2 ) 2 ), and when the main composition is converted as an oxide,
SiO 2: 40~55% by weight,
Al 2 O 3 : 14 to 19% by weight,
Na 2 O: 1 to 5% by weight,
K 2 O: 0~3% by weight,
CaO: 6-12% by weight,
MgO: 2 to 7% by weight,
Fe 2 O 3 : 8 to 13% by weight,
SO 3 : 2 to 15% by weight
It has excellent heat ray absorptivity, characterized by blending 6-15 parts by weight of fine Miyakejima volcanic ash containing 0.5 to 5 parts in weight, melting in a reducing atmosphere using a crucible, and molding. A method for producing glass colored in a clear blue like marine blue.
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| JP2001008685A JP4233222B2 (en) | 2001-01-17 | 2001-01-17 | Manufacturing method of colored glass |
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| JP2001008685A JP4233222B2 (en) | 2001-01-17 | 2001-01-17 | Manufacturing method of colored glass |
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| KR20030089113A (en) * | 2002-05-16 | 2003-11-21 | 주식회사 금강고려화학 | A batch composition for manufacturing infrared absorbing glass with copper slag and the green glass using said batch composition |
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