JP7138679B2 - 耐亀裂性ガラス-セラミック物品およびその製造方法 - Google Patents
耐亀裂性ガラス-セラミック物品およびその製造方法 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
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- C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
- C03C10/0018—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and monovalent metal oxide as main constituents
- C03C10/0027—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and monovalent metal oxide as main constituents containing SiO2, Al2O3, Li2O as main constituents
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- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B32/00—Thermal after-treatment of glass products not provided for in groups C03B19/00, C03B25/00 - C03B31/00 or C03B37/00, e.g. crystallisation, eliminating gas inclusions or other impurities; Hot-pressing vitrified, non-porous, shaped glass products
- C03B32/02—Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
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- 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
- C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
- C03C10/0018—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and monovalent metal oxide as main constituents
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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
- C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
- C03C10/0036—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and a divalent metal oxide as main constituents
- C03C10/0045—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and a divalent metal oxide as main constituents containing SiO2, Al2O3 and MgO as main constituents
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- 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
- C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
- C03C10/0054—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing PbO, SnO2, B2O3
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- 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
- C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
- C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
- C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
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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
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
- C03C3/093—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium containing zinc or zirconium
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31—Surface property or characteristic of web, sheet or block
- Y10T428/315—Surface modified glass [e.g., tempered, strengthened, etc.]
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Description
約62~約75の範囲内のSiO2;
約10.5~約17の範囲内のAl2O3;
約5~約13の範囲内のLi2O;
約0~約4の範囲内のZnO;
約0~約8の範囲内のMgO;
約2~約5の範囲内のTiO2;
約0~約4の範囲内のB2O3;
約0~約5の範囲内のNa2O;
約0~約4の範囲内のK2O;
約0~約2の範囲内のZrO2;
約0~約7の範囲内のP2O5;
約0~約0.3の範囲内のFe2O3;
約0~約2の範囲内のMnOx;
約0.05~約0.2の範囲内のSnO2;
約0.7~約1.5の範囲内の比
約0.04を超える比:
a)約1℃/分~約10℃/分の範囲内の速度で、約700℃~約810℃の範囲内の核形成温度(Tn)まで加熱するステップと、
b)前駆体ガラス物品をTnで維持して、核形成された前駆体ガラス物品を形成するステップと、
c)核形成された前駆体ガラス物品を約1℃/分~約10℃/分の範囲内の速度で、約850℃~約1250℃の範囲内の結晶化温度(Tc)まで加熱するステップと、
d)核形成された前駆体ガラス物品をTcで維持して、結晶相を有するガラス-セラミック物品を形成するステップと、
e)ガラス-セラミック物品を約10℃/分~約25℃/分の範囲内の平均速度で室温付近まで冷却するステップと
によって、約5mm未満または約2mm以下の厚さを有する前駆体ガラス物品をセラミック化するステップを有する。1つ以上の実施形態において、前駆体ガラス物品をセラミック化するステップは、約4時間未満の全時間にわたって行われる。前駆体ガラス物品は圧延プロセスによって形成することができる。
(1)[Li2O+Na2O+K2O+MgO+ZnO]のモル合計の、[Al2O3+B2O3]のモル合計に対する比が、約0.7~約1.5の範囲内、ある別の態様では約0.75~約1.5の範囲内となることができ、別の態様では約0.75~約1の範囲内、約0.8~約1、約1~約1.5、ならびにそれらの間のあらゆる範囲および部分的範囲となることができ;
(2)[TiO2+SnO2]のモル合計の、[SiO2+B2O3]のモル合計に対する比が、0.04を超えることができ、ある別の態様では0.05を超えることができる。
(1)1:1:4.5~1:1:8、または1:1:4.5~1:1:7の範囲のLi2O:Al2O3:SiO2比を示し、結晶相の少なくとも70重量%を構成するβ-スポジュメン固溶体と;
(2)
a.ガラス-セラミックの結晶相の約2.5~8重量%、
b.長さ≧約50nmを示す針状形態、および
c.ルチル
を含む少なくとも1つのTi含有結晶相と;任意選択的に、
(3)スピネル構造を示し結晶相の1~10重量%を構成する1つ以上の結晶相と
のいずれか1つ以上を示す。
(1)0.03未満の損失正接によって15MHz~3.0GHzの周波数範囲において定義される無線周波数およびマイクロ波周波数透明性;
(2)1MPa・m1/2を超える破壊靱性;
(3)20,000psi(137.9MPa)を超える破壊係数(MOR);
(4)少なくとも400kg/mm2のヌープ硬さ;
(5)4W/m℃(4W/mk)未満の熱伝導率;および
(6)0.1体積%未満の多孔度
の1つ以上が挙げられる。
(1)[Li2O+Na2O+K2O+MgO+ZnO]のモル合計の、[Al2O3+B2O3]のモル合計に対する比が、約0.7~約1.5の範囲内、ある別の態様では約0.75~約1.5の範囲内、さらに別の態様では約0.75~約1、約0.8~約1、約1~約1.5の範囲内、ならびにそれらの間のあらゆる範囲および部分的範囲であってよく、
(2)[TiO2+SnO2]のモル合計の、[SiO2+B2O3]のモル合計に対する比が、0.04を超えてよく、ある別の態様では0.05を超えてよい。
さらに別の態様においては、原材料のこのような混合物は、約1600℃未満の温度での溶融ガラス組成物の清澄および均質化によって上記前駆体ガラスが得られるように配合される。
組成1のガラスを工業用炉中で溶融させて溶融ガラスを形成し、これを圧延によって厚さ約15mmの棒に成形した。これらの厚さ15mmの棒を機械加工することによって厚さ約2mmの薄いサンプルを作製した。これらのサンプルは、以下の表4に示されるセラミック化サイクル1の加熱計画を用いて静止炉中でセラミック化したが、サンプルは以下の表2に示されるように異なる冷却速度を用いて冷却した。比較例Aは約5℃/分の速度で静止炉中で室温まで冷却した。実施例B~Eは、最初に炉速度(すなわち、5℃/分)で炉中で冷却し、800~950℃の範囲のいずれかの)特定の温度(すなわち、それぞれ800℃、850℃、900℃、950℃)に到達した後、実施例B~Eは高速扇風機急冷によって室温まで冷却した。高速扇風機急冷の推定冷却速度は約300℃~約500℃/分の範囲内である。
Claims (6)
- モル%の単位で:
62~75の範囲内のSiO2;
10.5~17の範囲内のAl2O3;
5~13の範囲内のLi2O;
0~4の範囲内のZnO;
0~8の範囲内のMgO;
2~5の範囲内のTiO2;
0~4の範囲内のB2O3;
0~5の範囲内のNa2O;
0~4の範囲内のK2O;
0~2の範囲内のZrO2;
0~7の範囲内のP2O5;
0~0.3の範囲内のFe2O3;
0~2の範囲内のMnOx;
0.05~0.2の範囲内のSnO2;
0.7~1.5の範囲内の比
0.04を超える比:
少なくとも15kgf(147N)のビッカース亀裂発生閾値を有し、
結晶相を有し、該結晶相が主結晶相としてβ-スポジュメン固溶体を含む、
ことを特徴とする、ガラス-セラミック物品。 - 前記結晶相が、さらに、Ti含有結晶相、スピネル構造、及び、コーディエライトの内の少なくとも1つを含むことを特徴とする、請求項1に記載のガラス-セラミック物品。
- 前記Ti含有結晶相が、ルチル、アナターゼ、チタン酸マグネシウム、及び、チタン酸アルミニウムの内の少なくとも1つを含むことを特徴とする、請求項2に記載のガラス-セラミック物品。
- 0.8mmの厚さの場合に400nm~700nmの範囲内の波長にわたって少なくとも85%の平均不透明度と;
観察者角度10°およびCIE光源F02の場合に、分光光度計を用いて正反射率を含めた反射スペクトル測定から測定される、CIELAB色空間座標において表される色と
を有し、前記色空間座標が:
-3~+3のCIE a*、
-6~+6のCIE b*、および
88~97のCIE L*
を含むことを特徴とする、請求項1~3のいずれか一項に記載のガラス-セラミック物品。 - 前記結晶相が、前記ガラス-セラミック物品の少なくとも70重量%を占めることを特徴とする、請求項1~4のいずれか一項に記載のガラス-セラミック物品。
- 前記ガラス-セラミック物品の表面から前記ガラス-セラミック物品中に延在する少なくとも300MPaの圧縮応力層と、前記ガラス-セラミック物品の全体の厚さの少なくとも1%の圧縮応力層深さとをさらに有することを特徴とする、請求項1~5のいずれか一項に記載のガラス-セラミック物品。
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