JP4122558B2 - High visible light transmitting UV absorbing glass and UV absorbing colored glass plate - Google Patents
High visible light transmitting UV absorbing glass and UV absorbing colored glass plate Download PDFInfo
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- JP4122558B2 JP4122558B2 JP07971698A JP7971698A JP4122558B2 JP 4122558 B2 JP4122558 B2 JP 4122558B2 JP 07971698 A JP07971698 A JP 07971698A JP 7971698 A JP7971698 A JP 7971698A JP 4122558 B2 JP4122558 B2 JP 4122558B2
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- 239000011521 glass Substances 0.000 title claims description 37
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 37
- 238000002834 transmittance Methods 0.000 claims description 36
- 229910052684 Cerium Inorganic materials 0.000 claims description 15
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 15
- 239000010936 titanium Substances 0.000 claims description 15
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 13
- 229910052719 titanium Inorganic materials 0.000 claims description 13
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 239000005361 soda-lime glass Substances 0.000 claims description 8
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 5
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 8
- 239000002994 raw material Substances 0.000 description 8
- 239000005357 flat glass Substances 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 239000011734 sodium Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 239000011669 selenium Substances 0.000 description 4
- 230000000638 stimulation Effects 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000004031 devitrification Methods 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910000420 cerium oxide Inorganic materials 0.000 description 2
- 229910000428 cobalt oxide Inorganic materials 0.000 description 2
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- BVTBRVFYZUCAKH-UHFFFAOYSA-L disodium selenite Chemical compound [Na+].[Na+].[O-][Se]([O-])=O BVTBRVFYZUCAKH-UHFFFAOYSA-L 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 2
- 229960001471 sodium selenite Drugs 0.000 description 2
- 235000015921 sodium selenite Nutrition 0.000 description 2
- 239000011781 sodium selenite Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000006124 Pilkington process Methods 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 206010042496 Sunburn Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- GHLITDDQOMIBFS-UHFFFAOYSA-H cerium(3+);tricarbonate Chemical compound [Ce+3].[Ce+3].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O GHLITDDQOMIBFS-UHFFFAOYSA-H 0.000 description 1
- UNJPQTDTZAKTFK-UHFFFAOYSA-K cerium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[Ce+3] UNJPQTDTZAKTFK-UHFFFAOYSA-K 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- -1 etc. Chemical compound 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000006025 fining agent Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- KAEAMHPPLLJBKF-UHFFFAOYSA-N iron(3+) sulfide Chemical compound [S-2].[S-2].[S-2].[Fe+3].[Fe+3] KAEAMHPPLLJBKF-UHFFFAOYSA-N 0.000 description 1
- 239000005340 laminated glass Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010446 mirabilite Substances 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 229940091258 selenium supplement Drugs 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
-
- 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
- C03C4/00—Compositions for glass with special properties
- C03C4/08—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths
- C03C4/082—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths for infrared absorbing glass
-
- 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
- C03C4/00—Compositions for glass with special properties
- C03C4/08—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths
- C03C4/085—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths for ultraviolet absorbing glass
Description
【０００１】
【発明の属する技術分野】
本発明は、高い紫外線吸収能と高い可視光透過率を持つ高可視光透過紫外線吸収ガラスに関する。
【０００２】
【従来の技術】
従来、車両窓用ガラスとして、ブラウン、グリーン、ブルー、グレーなどさまざまな色を呈するガラスが提案され、使用されている。
かかる窓ガラスは、車両用ウインドシールドに用いるときは、可視光透過率として７０％以上を満足する必要のあることが、多くの国で規定されている。一方、車の内装品の劣化などを防止するため、紫外線吸収能の高いガラスが求められており、両者を同時に満たすガラスとして、特開平５−５８６７０（ブラウン）や特開平８−２０８２６６（グリーン）、特開平９−２７８４８１（ブラウン）などがすでに提案されている。
【０００３】
【発明が解決しようとする課題】
しかし、かかるガラスは高い可視光透過率と低い紫外線透過率とを両立させる必要があるため、色にバリエーションを持たせにくい。また、充分に高い紫外線吸収能と可視光透過率を持つわけではない。具体的には、厚さ３．５ｍｍに換算してＩＳＯ−９０５０に規定された紫外線透過率が１３％以下であり、厚さ３．５ｍｍに換算して標準光源Ａにより測定した可視光透過率が８０％以上であるようなきわめて高い可視光透過率と低い紫外線透過率とを両立させたガラスは上記文献において、具体的には提案されていない。
【０００４】
【課題を解決するための手段】
本発明は、前述のような課題を解決するためになされたものであり、
ソーダ石灰ガラスが本質的に以下の成分からなり、
ＳｉＯ 2 ６５〜７５重量％、
Ａｌ 2 Ｏ 3 ０．１〜 ５重量％、
Ｎａ 2 Ｏ １０〜１８重量％、
Ｋ 2 Ｏ ０〜 ５重量％、
ＣａＯ ５〜１５重量％、
ＭｇＯ ０〜 ６重量％
ソーダ石灰ガラスからなる母成分１００重量部に対し、
Ｆｅ2 Ｏ3 に換算した全鉄 ０〜０．１２重量部、
ＣｅＯ 2 に換算した全セリウム １．０〜２．５重量部、
ＴｉＯ 2 に換算した全チタン ０．６〜２．０重量部、
ＣｅＯ2 に換算した全セリウム＋ＴｉＯ2 に換算した全チタン
２．４〜４．０重量部、
ＣｏＯ ０〜０．００５０重量部、
Ｓｅ ０〜０．０３００重量部、
を含有し、厚さ３．５ｍｍに換算してＩＳＯ−９０５０に規定された紫外線透過率が１３％以下であり、厚さ３．５ｍｍに換算して標準光源Ａにより測定した可視光透過率が８０％以上であることを特徴とする高可視光透過紫外線吸収ガラスを提供する。
【０００５】
【発明の実施の形態】
本発明のガラスは、ソーダ石灰ガラスからなる母成分に対し、所定量の添加成分を含有せしめたものである。この添加成分に関して以下に説明する。
Ｆｅ2 Ｏ3 に換算した全鉄の含有量が母成分１００重量部に対して０．１２重量部を超えると、可視光透過率が小さくなるおそれがある。好ましくは、母成分１００重量部に対して０．１０重量部以下である。ここで、Ｆｅ2 Ｏ3 は必須ではないが、紫外線吸収能を高めるために、母成分１００重量部に対して０．０３重量部以上含有されることが好ましい。
【０００６】
本発明では、Ｆｅ2 Ｏ3 に換算した全鉄中のＦｅ2 Ｏ3 に換算した２価の鉄の割合を１０〜６５％とすることが好ましい。これが１０％未満では、ガラス熔融時の窯内対流が減少し泡増加などにより製品品質が低下するおそれがある。一方、６５％を超えると、硫化第二鉄の生成により部分的にアンバー色になり、製品の色調に悪影響を与えるおそれがある。製造のしやすさを考慮すると、より好ましくは２０〜４０％である。
【０００７】
セリウムの存在形態には主としてＣｅ3+、Ｃｅ4+があり、両者とも、紫外線吸収効果を有する成分である。また、チタンをセリウムと併用することにより紫外線吸収能を増大できる。すなわち、近紫外域に吸収を持つセリウムはＣｅ3+であるために、ＣｅＯ2 をＴｉ2 Ｏ3 で還元することによって、さらに近紫外線吸収の効果を持たせうる。
【０００８】
ＣｅＯ2 に換算した全セリウムとＴｉＯ2 に換算した全チタンの合量が母成分１００重量部に対して２．４重量部未満では、充分な紫外線吸収効果が得られないおそれがある。好ましくは、２．５重量部以上である。また、コストを考慮するとＣｅＯ2 に換算した全セリウムとＴｉＯ2 に換算した全チタンの合量が母成分１００重量部に対して４．０重量部以下であることが現実的である。
【０００９】
具体的には、ＣｅＯ2 に換算した全セリウムは、母成分１００重量部に対して１．０〜２．５重量部の範囲が好ましい。また、ＴｉＯ2 に換算した全チタンの含有量は母成分１００重量部に対して０．６〜２．０重量部の範囲が好ましい。これらの範囲をはずれると、両成分の相乗効果が充分でなく、低い紫外線透過率と高い可視光透過率との両立が困難になるおそれがある。
【００１０】
ＣｏＯは必須ではないが、ガラスの主波長と刺激純度とを調整するために含有させることができる。この効果を得るためには、母成分１００重量部に対して０．０００３重量部以上含有させることが好ましい。一方、この含有量が母成分１００重量部に対して０．００５０重量部を超えると、可視光透過率が低下するおそれがある。好ましくは、母成分１００重量部に対して０．００３０重量部以下である。
【００１１】
Ｓｅは、必須ではないが、ガラスの主波長と刺激純度とを調整するために含有できる。この効果を得るためには、母成分１００重量部に対して０．０００３重量部以上含有させることが好ましい。一方、この含有量が母成分１００重量部に対して０．０３００重量部を超えると、可視光透過率が低下するおそれがある。好ましくは、母成分１００重量部に対して０．００１０重量部以下である。
【００１２】
また、母成分であるソーダ石灰ガラスの組成は、本質的に以下の成分からなることが好ましい。
ＳｉＯ2 ６５〜７５重量％、
Ａｌ2 Ｏ3 ０．１〜 ５重量％、
Ｎａ2 Ｏ １０〜１８重量％、
Ｋ2 Ｏ ０〜 ５重量％、
ＣａＯ ５〜１５重量％、
ＭｇＯ ０〜 ６重量％。
【００１３】
ＳｉＯ2 の含有量が６５重量％未満では耐候性が悪くなり、７５重量％超では失透しやすい。
Ａｌ2 Ｏ3 の含有量が０．１重量％未満では耐水性が低下し、５重量％超では溶解性が低下する。
Ｎａ2 Ｏ、Ｋ2 Ｏは原料の溶解を促進する成分であり、Ｎａ2 Ｏの含有量が１０重量％未満ではその効果が小さく、１８重量％超では耐候性が悪くなる。また、Ｋ2 Ｏは必須成分ではないが含まれていてもよい。その含有量が５重量％超ではコストが高くなる。
【００１４】
ＣａＯ、ＭｇＯは原料の溶解を促進し耐候性を改善する成分である。ＣａＯの含有量が５重量％未満では上述の効果が少なく、１５重量％超では失透しやすくなる。ＭｇＯは必須成分ではないが含まれていてもよい。その含有量が６重量％超では失透しやすくなる。
ＳＯ3 は清澄剤として用いられる場合がある。そのようなとき、典型的にガラスに残留するＳＯ3 の量は０．０５〜１．０重量％の間にある。
【００１５】
次に本発明のガラスの光学特性について説明する。本明細書において、厚さ３．５ｍｍに換算して標準光源Ａにより測定した可視光透過率をＴva、厚さ３．５ｍｍに換算してＩＳＯ−９０５０に規定された紫外線透過率をＴUVということにする。
【００１６】
本発明の高可視光透過紫外線吸収ガラスはＴUVが１３％以下であり、Ｔvaが８０％以上である。好ましくは、ＴUVが１２％以下である。また、Ｔvaが８５％以上である。また、本発明においては、ＴvaのＴUVに対する比Ｔva／ＴUVが７以上であることが好ましい。
【００１７】
本発明においては特に限定されないが、本発明の高可視光透過紫外線吸収ガラスは、典型的には、標準光源Ｃにより測定した主波長が４８０〜５９０ｎｍとなり、また、刺激純度は用途によって調整でき、標準光源Ｃにより測定し、厚さ３．５ｍｍに換算したもので、０〜１０％である。さらに、特に限定されないが、３．５ｍｍ厚換算で、典型的には日射透過率が７０〜８５％となる。
【００１８】
本発明の紫外線吸収ガラスは、例えば、次のようにして製造できる。すなわち、目標とするガラス組成になるように、各原料を調合する。その際に使用する原料としては、ＦｅＯ、Ｆｅ2 Ｏ3 源として、鉄粉、ベンガラ等が、セリウム源として、酸化セリウム、炭酸セリウム、水酸化セリウム等が、チタン源として、酸化チタン等が、ＣｏＯ源として、酸化コバルト等が、Ｓｅ源として、金属セレン、亜セレン酸ソーダ等がある。なお、母成分の原料としては、通常使用されているものが使用される。さらに、これらの原料に炭素等の還元剤を添加して、ＦｅＯが所定量含有されるようにするのが好ましい。
【００１９】
かくして調合した原料を連続的に熔融炉に供給し、重油等により約１５００℃に加熱し熔融してガラス化する。次いで、この熔融ガラスを清澄した後、フロート法等により所定の厚さの板ガラスに成形する。次いで、この板ガラスを所定の形状に切断することにより本発明の高可視光透過紫外線吸収ガラスが製造される。その後、必要に応じて、切断したガラスを強化処理し、合せガラスに加工しまたは複層ガラスに加工できる。
【００２０】
本発明の高可視光透過紫外線吸収ガラスは可視光透過率が高く、かつ紫外線を充分に吸収するので、窓ガラスとして視認性の高いものが得られるうえ、紫外線による内装材やシートの劣化を防止できる。したがって建築用、車両用の窓ガラスとして特に有用である。
【００２１】
【００２２】
【００２３】
【００２４】
【００２５】
【００２６】
【００２７】
【００２８】
【実施例】
以下に実施例を挙げて本発明を詳細に説明するが、本発明はこれらに限定されない。
原料として、ケイ砂、長石、苦灰岩、ソーダ灰、芒硝、酸化第二鉄、酸化セリウム、二酸化チタン、酸化コバルト、亜セレン酸ソーダ、コークスを用い、調合したバッチを、実窯に近いと思われる雰囲気（Ｏ2 濃度２．０％程度）下で熔融し、適切な成形・徐冷を行うことにより、表１に示す添加物組成（単位：母成分全体を１００重量部とした場合の重量部）、ｒｅｄｏｘ（Ｆｅ2 Ｏ3 に換算した全鉄中のＦｅ2 Ｏ3 に換算した２価の鉄の重量割合、還元比）を有する高可視光透過紫外線吸収ガラスを得た。
【００２９】
なお、表中Ｆｅ2 Ｏ3 とあるのはＦｅ2 Ｏ3 に換算した全鉄であり、ＣｅＯ2 とあるのはＣｅＯ2 に換算した全セリウムであり、ＴｉＯ2 とあるのは、ＴｉＯ2 に換算した全チタンであり、Ｃｅ＋ＴｉとあるのはＣｅＯ2 に換算した全セリウムとＴｉＯ2 に換算した全チタンとの合量である。また、母成分としては、ＳｉＯ2 ：７２．０％、Ａｌ2 Ｏ3 ：１．９％、Ｎａ2 Ｏ：１２．８％、Ｋ2 Ｏ：０．８％、ＣａＯ：８．１％、ＭｇＯ：４．４％なる組成のソーダ石灰ガラスを使用した。
【００３０】
次いでこのガラスについて、Ｔva（％）、ＴUV（％）、厚さ３．５ｍｍ換算の日射透過率Ｔe （％）、標準光源Ｃで測定した主波長Ｄw （ｎｍ）、標準光源Ｃで測定した厚さ３．５ｍｍ換算の刺激純度Ｐe （％）を測定した。その結果を表１に併せて示す。可視光透過率、日射透過率はＪＩＳ−Ｒ３１６０に、主波長、刺激純度はＪＩＳ−Ｚ８７０１に、紫外線透過率はＩＳＯ−９０５０にしたがって求めた。例１〜１５は実施例、例１６〜２２は比較例である。なお、例１４、例１５の光学特性は計算機によるシミュレーションで求めた。
【００３１】
表より明らかなように、本発明によるガラスは可視光透過率、紫外線吸収能ともきわめて高い。
【００３２】
【表１】
【００３４】
【００３５】
【００３６】
【００３７】
【発明の効果】
本発明の高可視光透過紫外線吸収ガラスは可視光透過率が高く、かつ紫外線を充分に吸収するので、窓ガラスとして視認性の高いものが得られるうえ、紫外線による内装材やシートの劣化を防止し、また内部にいる人の日焼けを防止できる。したがって建築用、車両用の窓ガラスとして特に有用である。
【００３８】
また、本発明の高可視光透過紫外線吸収ガラスを用いることにより、車両用などの紫外線吸収着色ガラス板が得られる。 [0001]
BACKGROUND OF THE INVENTION
The present invention relates to a high visible light transmittance ultraviolet absorbing glass having high ultraviolet absorptivity and high visible light transmittance.
[0002]
[Prior art]
Conventionally, glasses having various colors such as brown, green, blue and gray have been proposed and used as glass for vehicle windows.
When such a window glass is used for a windshield for a vehicle, it is regulated in many countries that it is necessary to satisfy a visible light transmittance of 70% or more. On the other hand, in order to prevent deterioration of car interior parts, etc., a glass having a high ultraviolet absorbing ability is demanded. As glasses that satisfy both, JP-A-5-58670 (Brown) and JP-A-8-208266 (Green). JP-A-9-278481 (Brown) has already been proposed.
[0003]
[Problems to be solved by the invention]
However, since it is necessary for such glass to achieve both high visible light transmittance and low ultraviolet transmittance, it is difficult to provide variations in color. Further, it does not have a sufficiently high ultraviolet absorption ability and visible light transmittance. Specifically, the ultraviolet light transmittance defined in ISO-9050 in terms of thickness 3.5 mm is 13% or less, and the visible light transmittance measured by standard light source A in terms of thickness 3.5 mm. A glass that has both a very high visible light transmittance and a low ultraviolet transmittance such that the ratio is 80% or more is not specifically proposed in the above document.
[0004]
[Means for Solving the Problems]
The present invention has been made to solve the above-described problems,
Soda lime glass consists essentially of the following components:
SiO 2 65-75% by weight,
Al 2 O 3 0.1 to 5% by weight,
Na 2 O 10-18% by weight,
K 2 O 0-5% by weight,
CaO 5-15% by weight,
MgO 0 to 6% by weight
For 100 parts by weight of the mother component made of soda-lime glass,
0 to 0.12 parts by weight of total iron converted to Fe 2 O 3 ,
CeO 2 Total cerium converted to 1.0 to 2.5 parts by weight,
TiO 2 0.6 to 2.0 parts by weight of total titanium converted to
All titanium in terms of all the cerium + TiO 2 in terms of CeO 2
2.4 to 4.0 parts by weight,
0 to 0.0050 parts by weight of CoO,
Se 0-0.0300 parts by weight,
The ultraviolet light transmittance defined in ISO-9050 in terms of thickness 3.5 mm is 13% or less, and the visible light transmittance measured by standard light source A in terms of thickness 3.5 mm is to provide a high visible light transmittance ultraviolet absorbing glass, characterized in that less than 80%.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The glass of the present invention is obtained by adding a predetermined amount of an additive component to a mother component made of soda-lime glass. This additive component will be described below.
If the total iron content converted to Fe 2 O 3 exceeds 0.12 parts by weight with respect to 100 parts by weight of the mother component, the visible light transmittance may be reduced. Preferably, it is 0.10 parts by weight or less with respect to 100 parts by weight of the mother component. Here, Fe 2 O 3 is not essential, but it is preferably contained in an amount of 0.03 parts by weight or more with respect to 100 parts by weight of the mother component in order to enhance the ultraviolet absorbing ability.
[0006]
In the present invention, it is preferable to 10 to 65% the percentage of divalent iron in terms of Fe 2 O 3 in the total iron in terms of Fe 2 O 3. If this is less than 10%, the convection in the kiln at the time of melting the glass is reduced, and the product quality may be deteriorated due to an increase in bubbles. On the other hand, if it exceeds 65%, the production of ferric sulfide causes a partial amber color, which may adversely affect the color tone of the product. Considering the ease of production, it is more preferably 20 to 40%.
[0007]
The cerium exists mainly in Ce 3+ and Ce 4+ , both of which are components having an ultraviolet absorption effect. Moreover, ultraviolet absorption ability can be increased by using titanium together with cerium. That is, since cerium having absorption in the near ultraviolet region is Ce 3+ , the effect of absorbing near ultraviolet rays can be further obtained by reducing CeO 2 with Ti 2 O 3 .
[0008]
If the total amount of all cerium converted to CeO 2 and all titanium converted to TiO 2 is less than 2.4 parts by weight with respect to 100 parts by weight of the base component, a sufficient ultraviolet absorption effect may not be obtained. Preferably, it is 2.5 parts by weight or more. Further, considering the cost, it is realistic that the total amount of all cerium converted to CeO 2 and all titanium converted to TiO 2 is 4.0 parts by weight or less with respect to 100 parts by weight of the base component.
[0009]
Specifically, the total cerium in terms of CeO 2 in the range of 1.0 to 2.5 parts by weight with respect to the base component 100 parts by weight is preferred. The total titanium content converted to TiO 2 is preferably in the range of 0.6 to 2.0 parts by weight with respect to 100 parts by weight of the base component. Outside these ranges, the synergistic effect of both components is not sufficient, and it may be difficult to achieve both low UV transmittance and high visible light transmittance.
[0010]
CoO is not essential, but can be contained in order to adjust the dominant wavelength and stimulation purity of the glass. In order to acquire this effect, it is preferable to contain 0.0003 weight part or more with respect to 100 weight part of mother components. On the other hand, when the content exceeds 0.0050 parts by weight with respect to 100 parts by weight of the mother component, the visible light transmittance may be lowered. Preferably, it is 0.0030 weight part or less with respect to 100 weight part of mother components.
[0011]
Se is not essential, but can be contained to adjust the dominant wavelength and stimulation purity of the glass. In order to acquire this effect, it is preferable to contain 0.0003 weight part or more with respect to 100 weight part of mother components. On the other hand, when the content exceeds 0.0300 parts by weight with respect to 100 parts by weight of the mother component, the visible light transmittance may be reduced. Preferably, it is 0.0010 weight part or less with respect to 100 weight part of mother components.
[0012]
Moreover, it is preferable that the composition of the soda-lime glass which is a mother component consists essentially of the following components.
SiO 2 65-75% by weight,
Al 2 O 3 0.1-5% by weight,
Na 2 O 10 to 18 wt%,
K 2 O 0 to 5% by weight,
CaO 5-15% by weight,
MgO 0-6% by weight.
[0013]
When the content of SiO 2 is less than 65% by weight, the weather resistance deteriorates, and when it exceeds 75% by weight, devitrification tends to occur.
When the content of Al 2 O 3 is less than 0.1% by weight, the water resistance decreases, and when it exceeds 5% by weight, the solubility decreases.
Na 2 O and K 2 O are components that promote the dissolution of the raw material. If the content of Na 2 O is less than 10% by weight, the effect is small, and if it exceeds 18% by weight, the weather resistance is poor. Further, K 2 O may be contained is not an essential component. If the content exceeds 5% by weight, the cost increases.
[0014]
CaO and MgO are components that promote dissolution of raw materials and improve weather resistance. When the CaO content is less than 5% by weight, the above-described effects are small, and when it exceeds 15% by weight, devitrification is likely to occur. MgO is not an essential component but may be included. If the content exceeds 6% by weight, devitrification tends to occur.
SO 3 may be used as a fining agent. At such times, typically the amount of SO 3 remaining in the glass is between 0.05 and 1.0% by weight.
[0015]
Next, the optical characteristics of the glass of the present invention will be described. In this specification, the visible light transmittance measured by the standard light source A in terms of thickness 3.5 mm is T va , and the UV transmittance specified in ISO-9050 is converted to T UV in terms of thickness 3.5 mm. I will say.
[0016]
The high visible light transmitting ultraviolet absorbing glass of the present invention has T UV of 13% or less and T va of 80% or more. Preferably, T UV is 12% or less. Further, T va is 85% or more. In the present invention, it preferably has a specific T va / T UV for T UV of T va of 7 or more.
[0017]
Although not particularly limited in the present invention, the high visible light transmitting ultraviolet absorbing glass of the present invention typically has a main wavelength measured by a standard light source C of 480 to 590 nm, and the excitation purity can be adjusted depending on the application. Measured with a standard light source C and converted to a thickness of 3.5 mm, 0 to 10%. Further, although not particularly limited, the solar transmittance is typically 70 to 85% in terms of 3.5 mm thickness.
[0018]
The ultraviolet absorbing glass of the present invention can be produced, for example, as follows. That is, each raw material is prepared so that it may become a target glass composition. As raw materials used at that time, FeO, Fe 2 O 3 source, iron powder, bengara, etc., cerium source, cerium oxide, cerium carbonate, cerium hydroxide, etc., titanium source, titanium oxide, etc., Examples of the CoO source include cobalt oxide, and examples of the Se source include metal selenium and sodium selenite. In addition, what is used normally is used as a raw material of a mother component. Furthermore, it is preferable to add a reducing agent such as carbon to these raw materials so that a predetermined amount of FeO is contained.
[0019]
The raw materials thus prepared are continuously supplied to a melting furnace, heated to about 1500 ° C. with heavy oil or the like, melted, and vitrified. Next, the molten glass is clarified and then formed into a plate glass having a predetermined thickness by a float method or the like. Next, the plate glass is cut into a predetermined shape to produce the highly visible light transmitting ultraviolet absorbing glass of the present invention. Thereafter, if necessary, the cut glass can be tempered and processed into a laminated glass or processed into a multilayer glass.
[0020]
The high visible light transmitting ultraviolet absorbing glass of the present invention has a high visible light transmittance and sufficiently absorbs ultraviolet rays, so that a window glass having high visibility can be obtained, and deterioration of interior materials and sheets due to ultraviolet rays is prevented. it can. Therefore, it is particularly useful as a window glass for buildings and vehicles.
[0021 ]
[0022 ]
[0023 ]
[0024 ]
[0025 ]
[0026 ]
[0027 ]
[0028]
【Example】
Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited thereto.
Using raw materials such as silica sand, feldspar, dolomite, soda ash, mirabilite, ferric oxide, cerium oxide, titanium dioxide, cobalt oxide, sodium selenite, and coke, The additive composition shown in Table 1 (unit: the total amount of the base component is 100 parts by weight) is melted under an expected atmosphere (O 2 concentration of about 2.0%) and subjected to appropriate molding and slow cooling. parts by weight), to give the weight percentage of divalent iron in terms of Fe 2 O 3 in the total iron in terms of redox (Fe 2 O 3, a high visible light transmittance ultraviolet absorbing glass having a reduced specific).
[0029]
In the table, Fe 2 O 3 is all iron converted to Fe 2 O 3 , CeO 2 is all cerium converted to CeO 2 , and TiO 2 is TiO 2 . The total titanium is converted, and Ce + Ti is the total amount of all cerium converted to CeO 2 and all titanium converted to TiO 2 . As the mother component, SiO 2: 72.0%, Al 2 O 3: 1.9%, Na 2 O: 12.8%, K 2 O: 0.8%, CaO: 8.1%, MgO: Soda lime glass having a composition of 4.4% was used.
[0030]
Next, for this glass, T va (%), T UV (%), solar transmittance T e (%) in terms of thickness 3.5 mm, main wavelength D w (nm) measured with standard light source C, standard light source C The stimulation purity P e (%) in terms of thickness 3.5 mm measured in step 1 was measured. The results are also shown in Table 1. Visible light transmittance and solar transmittance were determined in accordance with JIS-R3160, dominant wavelength and stimulation purity in accordance with JIS-Z8701, and ultraviolet transmittance in accordance with ISO-9050. Examples 1 to 15 are examples, and examples 16 to 22 are comparative examples. The optical characteristics of Examples 14 and 15 were obtained by computer simulation.
[0031]
As is apparent from the table, the glass according to the present invention has very high visible light transmittance and ultraviolet absorption ability.
[0032]
[Table 1]
[0034 ]
[0035 ]
[0036 ]
[0037]
【The invention's effect】
The high visible light transmitting ultraviolet absorbing glass of the present invention has a high visible light transmittance and sufficiently absorbs ultraviolet rays, so that a window glass having high visibility can be obtained, and deterioration of interior materials and sheets due to ultraviolet rays is prevented. In addition, sunburn of people inside can be prevented. Therefore, it is particularly useful as a window glass for buildings and vehicles.
[0038]
Further, by using the highly visible light transmitting ultraviolet absorbing glass of the present invention, an ultraviolet absorbing colored glass plate for vehicles and the like can be obtained .
Claims (7)
ＳｉＯ 2 ６５〜７５重量％、
Ａｌ 2 Ｏ 3 ０．１〜 ５重量％、
Ｎａ 2 Ｏ １０〜１８重量％、
Ｋ 2 Ｏ ０〜 ５重量％、
ＣａＯ ５〜１５重量％、
ＭｇＯ ０〜 ６重量％
ソーダ石灰ガラスからなる母成分１００重量部に対し、
Ｆｅ2 Ｏ3 に換算した全鉄 ０〜０．１２重量部、
ＣｅＯ 2 に換算した全セリウム １．０〜２．５重量部、
ＴｉＯ 2 に換算した全チタン ０．６〜２．０重量部、
ＣｅＯ2 に換算した全セリウム＋ＴｉＯ2 に換算した全チタン
２．４〜４．０重量部、
ＣｏＯ ０〜０．００５０重量部、
Ｓｅ ０〜０．０３００重量部、
を含有し、厚さ３．５ｍｍに換算してＩＳＯ−９０５０に規定された紫外線透過率が１３％以下であり、厚さ３．５ｍｍに換算して標準光源Ａにより測定した可視光透過率が８０％以上であることを特徴とする高可視光透過紫外線吸収ガラス。 Soda lime glass consists essentially of the following components:
SiO 2 65-75% by weight,
Al 2 O 3 0.1 to 5% by weight,
Na 2 O 10-18% by weight,
K 2 O 0-5% by weight,
CaO 5-15% by weight,
MgO 0 to 6% by weight
For 100 parts by weight of the mother component made of soda-lime glass,
0 to 0.12 parts by weight of total iron converted to Fe 2 O 3 ,
CeO 2 Total cerium converted to 1.0 to 2.5 parts by weight,
TiO 2 0.6 to 2.0 parts by weight of total titanium converted to
Total cerium converted to CeO 2 + Total titanium converted to TiO 2
2.4 to 4.0 parts by weight,
0 to 0.0050 parts by weight of CoO,
Se 0-0.0300 parts by weight,
The ultraviolet light transmittance defined in ISO-9050 in terms of thickness 3.5 mm is 13% or less, and the visible light transmittance measured by standard light source A in terms of thickness 3.5 mm is A highly visible light transmitting ultraviolet absorbing glass characterized by being 80% or more.
Ｆｅ2 Ｏ3 に換算した全鉄 ０．０３〜０．１０重量部、
ＣｅＯ2 に換算した全セリウム １．０〜２．５重量部、
ＴｉＯ2 に換算した全チタン ０．６〜２．０重量部、
ＣｅＯ2 に換算した全セリウム＋ＴｉＯ2 に換算した全チタン
２．５〜４．０重量部、
ＣｏＯ ０．０００３〜０．００３０重量部、
Ｓｅ ０〜０．００１０重量部、
を含有する請求項１または２記載の高可視光透過紫外線吸収ガラス。For 100 parts by weight of the mother component made of soda-lime glass,
0.03 to 0.10 parts by weight of total iron converted to Fe 2 O 3 ,
1.0 to 2.5 parts by weight of total cerium converted to CeO 2
0.6 to 2.0 parts by weight of total titanium converted to TiO 2
Total cerium converted to CeO 2 + All titanium converted to TiO 2
2.5-4.0 parts by weight,
0.0003 to 0.0030 parts by weight of CoO,
Se 0-0.0010 parts by weight,
The highly visible light transmitting ultraviolet absorbing glass according to claim 1 or 2, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07971698A JP4122558B2 (en) | 1997-12-05 | 1998-03-26 | High visible light transmitting UV absorbing glass and UV absorbing colored glass plate |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33606697 | 1997-12-05 | ||
| JP9-336066 | 1997-12-05 | ||
| JP07971698A JP4122558B2 (en) | 1997-12-05 | 1998-03-26 | High visible light transmitting UV absorbing glass and UV absorbing colored glass plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11228176A JPH11228176A (en) | 1999-08-24 |
| JP4122558B2 true JP4122558B2 (en) | 2008-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07971698A Expired - Fee Related JP4122558B2 (en) | 1997-12-05 | 1998-03-26 | High visible light transmitting UV absorbing glass and UV absorbing colored glass plate |
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| JP (1) | JP4122558B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7825051B2 (en) * | 2006-01-12 | 2010-11-02 | Ppg Industries Ohio, Inc. | Colored glass compositions |
| JP6194889B2 (en) * | 2012-09-11 | 2017-09-13 | コニカミノルタ株式会社 | Organic electroluminescence device and light extraction sheet for organic electroluminescence device |
| JP6668823B2 (en) * | 2015-04-08 | 2020-03-18 | Ａｇｃ株式会社 | Plywood |
| JP6863906B2 (en) * | 2015-06-18 | 2021-04-21 | エージーシー グラス ユーロップＡｇｃ Ｇｌａｓｓ Ｅｕｒｏｐｅ | High-visibility transmittance glass plate with achromatic edges |
| JP2022040936A (en) * | 2020-08-31 | 2022-03-11 | Hoya株式会社 | Glass having colored layer and method for manufacturing the same |
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1998
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Also Published As
| Publication number | Publication date |
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| JPH11228176A (en) | 1999-08-24 |
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