WO2005058766A1 - Glass and glass-ceramic materials, articles and method of preparing the same - Google Patents
Glass and glass-ceramic materials, articles and method of preparing the same Download PDFInfo
- Publication number
- WO2005058766A1 WO2005058766A1 PCT/EP2004/014463 EP2004014463W WO2005058766A1 WO 2005058766 A1 WO2005058766 A1 WO 2005058766A1 EP 2004014463 W EP2004014463 W EP 2004014463W WO 2005058766 A1 WO2005058766 A1 WO 2005058766A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- glass
- ceramic material
- ceramic
- ceramics
- spodumene
- Prior art date
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- 239000006112 glass ceramic composition Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000002241 glass-ceramic Substances 0.000 claims abstract description 53
- 239000011521 glass Substances 0.000 claims abstract description 52
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000000203 mixture Substances 0.000 claims abstract description 26
- 239000006104 solid solution Substances 0.000 claims abstract description 16
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000006025 fining agent Substances 0.000 claims abstract description 12
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 7
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 7
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 7
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 7
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 7
- 238000002468 ceramisation Methods 0.000 claims description 21
- 239000002243 precursor Substances 0.000 claims description 20
- GOLCXWYRSKYTSP-UHFFFAOYSA-N Arsenious Acid Chemical compound O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 claims description 16
- 229910052642 spodumene Inorganic materials 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000010453 quartz Substances 0.000 claims description 12
- 238000002425 crystallisation Methods 0.000 claims description 11
- 230000008025 crystallization Effects 0.000 claims description 11
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims description 8
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 8
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Inorganic materials O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 7
- YEAUATLBSVJFOY-UHFFFAOYSA-N tetraantimony hexaoxide Chemical compound O1[Sb](O2)O[Sb]3O[Sb]1O[Sb]2O3 YEAUATLBSVJFOY-UHFFFAOYSA-N 0.000 claims description 7
- 239000003086 colorant Substances 0.000 claims description 6
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 5
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims description 5
- 238000010411 cooking Methods 0.000 claims description 5
- 238000000197 pyrolysis Methods 0.000 claims description 3
- GHPGOEFPKIHBNM-UHFFFAOYSA-N antimony(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Sb+3].[Sb+3] GHPGOEFPKIHBNM-UHFFFAOYSA-N 0.000 claims description 2
- 238000006555 catalytic reaction Methods 0.000 claims description 2
- -1 Fe O3 Chemical compound 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 33
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 abstract description 7
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 abstract description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 6
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052644 β-spodumene Inorganic materials 0.000 abstract description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052593 corundum Inorganic materials 0.000 abstract description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 2
- 229910000500 β-quartz Inorganic materials 0.000 abstract description 2
- 241000252067 Megalops atlanticus Species 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 15
- 230000005540 biological transmission Effects 0.000 description 13
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 7
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 6
- 239000006064 precursor glass Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000007858 starting material Substances 0.000 description 5
- 239000000470 constituent Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- BYFGZMCJNACEKR-UHFFFAOYSA-N aluminium(i) oxide Chemical compound [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 description 2
- 238000003279 ceramming Methods 0.000 description 2
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(II) oxide Inorganic materials [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- GNRSAWUEBMWBQH-UHFFFAOYSA-N nickel(II) oxide Inorganic materials [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000004031 devitrification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- VASIZKWUTCETSD-UHFFFAOYSA-N manganese(II) oxide Inorganic materials [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052566 spinel group Inorganic materials 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 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
-
- 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
- C03C10/0009—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 silica as main constituent
-
- 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
-
- 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
- C03C10/0018—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
-
- 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
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
Definitions
- the present invention relates to glass and glass-ceramic materials, articles and method of making the same.
- the present invention relates to glass-ceramic materials having ?-quartz or ?-spodumene as the predominant crystalline phase having a high ⁇ -OH level.
- the present invention is useful, for example, in the production of glass- ceramic articles such as cooktops, cook utensils, stove windows, and the like.
- BACKGROUND OF THE INVENTION [0002]
- numerous glass-ceramic materials and articles have been described, for use such as cooktops, cooking utensils, stove windows and the like. [0003] In United States Patent No.
- the glass-ceramic mateiral is obtained by heat treatment of the glass precursor, which comprises a step of crystallization at a temperature on the order of 1,070°C to 1,090°C. The higher the temperature of this crystallization step is, the more the opacity of the material.
- the glass precursor of the glass-ceramics of the invention are also suitable for obtaining efficient glass-ceramics of main crystalline phase of ⁇ -quaxtz. It therefore enables the manufacture of various transparent or opaque products from the same glass precursor composition. This flexibility of the method in question is highly desirable in the art.
- a transparent, translucent or opaque glass-ceramic material containing, as main crystalline phase, solid solution of ?-quartz or /?-spodumene, characterized in that: (i) it essentially has the following composition, expressed as percentages by weight of oxides: 65 to 70% of SiO 2 18 to 23% ofAl 2 O 3 > 4 to 5% of Li 2 O 0 to ⁇ l% ofMgO 1 to 3% of ZnO 0 to 2% of BaO 1.8 to 4% ofTiO 2 1 to 2.5% of ZrO 2 0.4 to 1% of K 2 O and or Na 2 O; with, advantageously, an effective and non-excess amount of at least one fining agent; and (ii) it has a ?-OH value of higher than 0.2 mm "1 , preferably higher than 0.4 mm "1 .
- the composition of the glass-ceramic contains As O 3 and/or Sb 2 O 3 , as fining agent, in the following percentages by weight: As 2 O 3 0 - 1.5 Sb 2 O 3 0 - 1.5 with As 2 O 3 + Sb 2 O 3 0.5 - 1.5.
- the composition of the glass-ceramic material further comprises an effective amount of at least one colorant, advantageously selected from CoO, Cr 2 O 3 , Fe 2 O , MnO 2 , NiO, V 2 O 5) CeO 2 and their mixtures.
- an article made from a glass-ceramic material of the present invention described above which is preferably selected from the group consisting of a cook-top, a cooking utensil, a microwave oven plate, a fireplace window, a fire-door or fire-window, a pyrolysis oven window and a catalysis oven window.
- a third aspect of the present invention involves an inorganic glass, which is a precursor of a glass-ceramic material according to the present invention, characterized in that: (i) it essentially has the following composition, expressed as percentages by weight of oxides: 65 to 70% of SiO 2 18 to 23% ofAl 2 O 3 > 4 to 5% ofLi 2 O 0 to ⁇ l% ofMgO 1 to 3% of ZnO 0 to 2% of BaO 1.8 to 4% ofTiO 2 1 to 2.5% of ZrO 2 0.4 to 1% of K 2 O and/or Na 2 O; with, advantageously, an effective and non-excess amount of at least one fining agent; and (ii) it has a ⁇ - R value of higher than 0.2 mm "1 , preferably higher than 0.4 mm "1 .
- a fourth aspect of the present invention is a method of preparing a glass- ceramic material or article of the present invention described above, characterized in that it comprises heat-treating a crystallizable inorganic glass precursor of the glass-ceramic described above under conditions which ensure its ceramization.
- the heat treatment comprises a step of crystallization at a temperature of between 1,050 and 1,200°C.
- the heat treatment comprises a step of crystallization at a temperature of between 840 and 900°C.
- the present invention has the surprising benefit that, because of the choice of composition, notwithstanding the high water content of at least 0.2 mm "1 , preferably at least 0.4 mm "1 in the precursor glass, the glass-ceramic composition comprising ⁇ - spodumene solid solution as the main crystalline phase can be obtained at a high ceramming temperature without cracking and reduction in mechanical strength. Further, the cerammed material and/or articles have a low thermal expansion. In addition, effective glass-ceramic materials and/or articles comprising ?-quartz solid solution as the main crystalline phase can be produced as well from the precursor glass of the present invention.
- FIG. 1 is a diagram showing the transmission curves of the glass-ceramic materials in the Examples of the present invention and Comparative Examples.
- the glass-ceramic materials of the present invention which can exist in transparent, translucent (opalescent) or opaque form, i.e., which contain ?-quartz or ⁇ - spodumene as main crystalline phase, are characterized in that they essentially have the following composition, expressed in percentages by weight of oxides: 65 to 70% of SiO 2 18 to 23% ofAl 2 O 3 > 4 to 5% ofLi 2 O 0 to ⁇ l% ofMgO 1 to 3% of ZnO 0 to 2% of BaO 1.8 to 4% ofTiO 2 1 to 2.5% ofZrO 2 0.4 to 1% of K 2 O and or Na 2 O; with, advantageously, an effective and non-excess amount of at least one fining agent, and in that it comprises a ⁇ -O ⁇ .
- MgO over 1% of MgO and the thermal expansion is not acceptable
- ZnO ZnO enables, with Li 2 O, the coefficient of thermal expansion of the glass-ceramics to be adjusted. Thus, it must be incorporated at less than 1%. At too high a content (> 3%), a risk is taken of crystallizing other crystalline phases, such as spinels, which have a high thermal expansion
- BaO BaO is an optional element which enables the viscosity of the glass precursor to be adjusted. It remains in the amorphous phase of the glass-ceramic. If it is incorporated in an amount which is greater than 2%, it is difficult to keep a low thermal expansion;
- TiO 2 and ZrO 2 are incorporated as nucleation agents. If they are incorporated in too low an amount, the precursor glass does not crystallize; if they are incorporated in too high an amount, the devitrification, upon cooling, can be difficult to control;
- Na 2 O and K O enable the problems of mechanical strength and surface cracking to be limited. These constituents remain in the amorphous phase of the glass- ceramic. If they are incorporated in too great an amount, they have a harmful effect upon the thermal expansion. [0031] Within the composition set forth, it was possible, in a non-obvious manner, to take advantage of the beneficial action, of Al 2 O and/or K 2 O and/or Na 2 O, on the mechanical properties (also on the absence of cracks) while at the same time limiting, even compensating for, mainly by virtue of Li 2 O, their harmful action on the thermal expansion. [0032] The optional constituents, MgO and BaO, when they are present, are generally present at at least 0.1% by weight.
- composition specified above advantageously contains an effective and non-excess amount of at least one fining agent.
- the person skilled in the art knows well how to manage the incorporation of this type of compounds within the glass precursor. In general, it is incorporated at less than 3% by weight, rather at less than 2% by weight of this type of compounds.
- As 2 O 3 and/or Sb 2 O 3 are in general incorporated as fining agent in the following amounts: As 2 O 3 0 - 1.5 Sb 2 O 3 0 - 1.5 with As 2 O 3 + Sb 2 O 3 0,5 - 1.5 (% by weight).
- the glass-ceramic of the invention may be colored or not. In order for it to have a real coloration, it contains, in addition to its constituent elements listed above, an effective amount, which does not in general exceed 2% by weight, of at least one colorant.
- Said colorant(s) is(are) advantageously selected from CoO, Cr 2 O 3 , Fe 2 O 3 , MnO , NiO,
- As colored glass-ceramics (black, transparent) of the invention those which have the composition by weight indicated above are more particularly preferred with, in addition, 0.03 (advantageously 0.05) to 1% by weight of V O 5 and the following condition:
- the glass-ceramic materials of the invention which are efficient in terms of transmission, of mechanical strength and of thermal expansion, can contain relatively high water contents ( ⁇ -OH > 0.2 mm "1 , even /?-OH > 0.4 mm "1 ), which do not notably impose any constraint, during their preparation process. No particular precautions are required. These affirmations are confirmed by the Examples below.
- the glass-ceramic materials of the invention can exist with a predominant crystalline phase of ⁇ -quartz or 7-spodumene solid solution.
- the glass-ceramics of the invention are glass-ceramics having a predominant crystalline phase of ?-spodumene solid solution.
- Such glass- ceramics when they contain an effective amount of at least one colorant selected from CeO 2 , MnO 2 and Fe 2 O 3 , have a beige color.
- the present invention relates to crystallizable inorganic glasses which are precursors of the glass-ceramics described above.
- Said inorganic glasses, which are crystallizable and are precursors of the glass-ceramics above essentially have the following composition, expressed in percentages by weight of oxides: 65 to 70% of SiO 2 18 to 23% ofAl 2 O 3 > 4 to 5% of Li 2 O 0 to ⁇ l% ofMgO 1 to 3% of ZnO 0 to 2% of BaO 1.8 to 4% ofTiO 2 l to 2.5% ofZrO 2 0.4 to 1% of K 2 O and/or Na 2 O; with, advantageously, an effective and non-excess amount of at least one fining agent.
- the glass has advantageously a ⁇ -OH value higher than 0.2 mm "1 , preferably higher than 0.4 mm "1 .
- Said inorganic glasses are optionally colored. According to what has been seen above, they can notably contain an effective amount of at least one of the following colorants: CoO, Cr 2 O 3 , Fe 2 O 3 , MnO 2 , NiO, V 2 O 5 and CeO 2 .
- the present invention relates to articles made from a glass-ceramic materials as described above.
- the articles in question can notably be selected from the group consisting of a cook-top, a cooking utensil, a microwave oven plate, a fireplace window (fireguard plate), a fire-door or fire-window or a pyro lysis oven window or catalysis-oven window. They advantageously are cook-tops.
- the present invention relates to the methods of preparation of glass-ceramic materials and articles.
- Said methods constitute analogous methods, which are implemented characteristically with crystallizable inorganic glasses having the weight composition set forth above.
- the glass-ceramic materials and articles of the invention are obtained by heat treating a crystallizable inorganic glass precursor, as characterized above, this heat treatment being implemented under conditions which ensure the ceramization of said glass precursor.
- the glass-ceramic articles of the invention are obtained by such a heat treatment after shaping the crystallizable inorganic glass precursor in question.
- the shaping is a classical step. It can notably be pressing or rolling. It can notably be a shaping which is intended to confer the shape of a plate.
- the heat treatment in question classically comprises a rise in temperature, which is generally in stages, up to the crystallization temperature maintained over an adequate period of time. Said heat treatment of the invention generally lasts less than 2 hours. This is another advantageous point of the present invention.
- said heat treatment In order to obtain a glass-ceramic the main crystalline phase of which isf5-spodumene solid solution, said heat treatment generally comprises the crystallization step at a temperature of between 1,050 and 1,200°C. [0052] In order to obtain a glass-ceramic of the invention, the main crystalline phase of which is /J-quartz solid solution, said heat treatment generally comprises the crystallization step at a temperature of between 840 and 900°C.
- Example I the importance of which more particularly emerges upon consideration of Comparative Examples 1 and 2
- Examples II and III the importance of which more particularly emerges upon consideration of Comparative Example 3.
- Example I the present invention
- Comparative Examples 1 and 2 [0056] Said Comparative Examples 1 and 2 illustrate the prior art.
- the MOR values were measured according to ASTM standard
- MOR values 144 MPa and 124 MPa, respectively.
- Example 1 except that its OH content is much lower. Consequently, the glass-ceramics obtained from said glass - glass-ceramics comprising ?-spodumene as the main crystalline phase, white in color and slightly translucent (that obtained after the Ceramization
- Schedule 2 is a little more opaque than that obtained after the Ceramization Schedule 1) - have higher MOR values: 209 MPa and 294 MPa, respectively.
- the glass of Example I is a glass precursor of the invention. Despite a significant OH content (almost identical to that of the glass of Comparative Example 1), it does enable efficient glass-ceramics to be obtained, with regard to both: - their low thermal expansion values, and - their high MOR values (191 MPa and 195 MPa).
- the glass-ceramics of the invention obtained by the Ceramization Schedules 1 and 2 are glass-ceramics of ⁇ -spodumene, white in color and slightly translucent.
- the glass-ceramic of the invention obtained by the Ceramization Schedule 3 is a glass-ceramic of ⁇ -quartz. It is transparent.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Dispersion Chemistry (AREA)
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- Electric Ovens (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006544372A JP4925187B2 (en) | 2003-12-17 | 2004-12-17 | Glass and glass ceramic materials, products and methods for their preparation |
EP04804063.8A EP1704125B8 (en) | 2003-12-17 | 2004-12-17 | Glass and glass-ceramic materials, articles and method of preparing the same |
KR1020067014276A KR101050281B1 (en) | 2003-12-17 | 2004-12-17 | Glass and Glass-Ceramic Materials, Products, and Methods for Making the Same |
CN2004800381046A CN1898170B (en) | 2003-12-17 | 2004-12-17 | Glass and glass-ceramic material, article and method of preparing the same |
ES04804063T ES2404281T3 (en) | 2003-12-17 | 2004-12-17 | Glass and glass ceramic materials, articles and corresponding preparation procedure |
HK07104966.5A HK1098452A1 (en) | 2003-12-17 | 2007-05-10 | Glass and glass-ceramic materials, articles and method of preparing the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0314834 | 2003-12-17 | ||
FR0314834A FR2864071A1 (en) | 2003-12-17 | 2003-12-17 | Improved vitroceramic from a glass precursor with transparent, translucent or opaque aspects for cooking plates and other fire resistant applications |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005058766A1 true WO2005058766A1 (en) | 2005-06-30 |
Family
ID=34630265
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/014463 WO2005058766A1 (en) | 2003-12-17 | 2004-12-17 | Glass and glass-ceramic materials, articles and method of preparing the same |
Country Status (9)
Country | Link |
---|---|
US (1) | US7153795B2 (en) |
EP (1) | EP1704125B8 (en) |
JP (1) | JP4925187B2 (en) |
KR (1) | KR101050281B1 (en) |
CN (1) | CN1898170B (en) |
ES (1) | ES2404281T3 (en) |
FR (1) | FR2864071A1 (en) |
HK (1) | HK1098452A1 (en) |
WO (1) | WO2005058766A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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Cited By (8)
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EP2094879A1 (en) * | 2006-11-27 | 2009-09-02 | Momentive Performance Materials Inc. | Quartz encapsulated heater assembly |
EP3018107A1 (en) | 2014-11-06 | 2016-05-11 | Schott AG | Highly crystalline lithium aluminium silicate glass ceramic material and use of same |
DE102014222645A1 (en) | 2014-11-06 | 2016-05-12 | Schott Ag | Highly crystalline lithium aluminum silicate glass-ceramic and its use |
US10562808B2 (en) | 2014-11-06 | 2020-02-18 | Schott Ag | Highly crystalline lithium aluminium silicate glass-ceramic and its use |
WO2016193171A1 (en) | 2015-05-29 | 2016-12-08 | Eurokera | Transparent, essentially colorless, tin-fined las glass-ceramics with improved microstructure and thermal expansion properties |
DE202016007247U1 (en) | 2015-05-29 | 2016-12-21 | Eurokera S.N.C. | Transparent, substantially colorless, tin-refined Las glass-ceramic with improved microstructure and thermal expansion properties |
US10961146B2 (en) | 2015-05-29 | 2021-03-30 | Eurokera | Transparent, essentially colorless, tin-fined las glass-ceramics with improved microstructure and thermal expansion properties |
CN111908793A (en) * | 2020-06-29 | 2020-11-10 | 成都光明光电股份有限公司 | Glass-ceramic and glass-ceramic article with spinel crystal phase |
Also Published As
Publication number | Publication date |
---|---|
KR101050281B1 (en) | 2011-07-19 |
EP1704125B1 (en) | 2013-02-13 |
HK1098452A1 (en) | 2007-07-20 |
ES2404281T3 (en) | 2013-05-27 |
EP1704125B8 (en) | 2013-04-24 |
JP4925187B2 (en) | 2012-04-25 |
JP2007518657A (en) | 2007-07-12 |
CN1898170B (en) | 2011-12-07 |
US7153795B2 (en) | 2006-12-26 |
EP1704125A1 (en) | 2006-09-27 |
FR2864071A1 (en) | 2005-06-24 |
CN1898170A (en) | 2007-01-17 |
KR20060117992A (en) | 2006-11-17 |
US20050143246A1 (en) | 2005-06-30 |
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