摘要:
The process for producing a transparent lithium aluminosilicate glass ceramic plate includes ceramicizing a green glass body of the Li2O—Al2O—SiO2 system using a ceramization program, which includes heating it, for the purpose of nucleation, to a temperature of 750° C.±20° C. and maintaining the temperature for 20±15 minutes, further heating the green glass body, for the purpose of ceramization, to a temperature of 900±20° C. and maintaining the to temperature for 20±15 minutes and then cooling to room temperature. The transparent plate has a thermal expansion coefficient (CTE) from −0.15×10−6/K to +0.15×10−6/K at 30 to 700° C. and a brightness value observed at an angle of 2° of ≧80 for a 4-mm thick plate for transmitted normal light.
摘要:
A method is described for making a float glass convertible into a glass ceramic, by which a largely crystal fault-free glass can be produced. In this method the glass is cooled from a temperature (TKGmax), at which a crystal growth rate is at a maximum value (KGmax), to another temperature (TUEG), at which practically no more crystal growth occurs, with a cooling rate, KR, in ° C. min−1 according to: KR UEG KGmax ≥ Δ T UEG KGmax 100 · KG max , wherein ΔT=TKGmax−TUEG, and KGmax=maximum crystal growth rate in μm min−1. The float glass has a thickness below an equilibrium thickness, a net width of at least 1 m and has no more than 50 crystals with a size of more than 50 μm, especially no crystals with a size of more than 10 μm, per kilogram of glass within the net width.
摘要:
A glass ceramic as cooktop for induction heating having improved colored display capability and heat shielding is provided. The cooktop includes a transparent, dyed glass ceramic plate having high-quartz mixed crystals as a predominant crystal phase. The glass ceramic contains none of the chemical refining agents arsenic oxide and/or antimony oxide and has a transmittance values greater than 0.4% at at least one wavelength in the blue spectrum between 380 and 500 nm, a transmittance >2% at 630 nm, a transmittance of less than 45% at 1600 nm, and a light transmittance of less than 2.5% in the visible spectrum.
摘要:
Antiballistic armor is provided that includes a glass-ceramic component having 50 to 70 weight percent SiO2, 15 to 25 weight percent Al2O3, 0.5 to 5 weight percent ZrO2, 0.1 to 10 weight percent Li2O, 1 to 5 weight percent TiO2. The glass ceramic component has a main crystalline phase that comprises keatite mixed crystal in a compositional range of LiAlSi2O6 to LiAlSi4O10.
摘要翻译:提供了抗反射装甲,其包括具有50至70重量%SiO 2,15至25重量%Al 2 O 3,0.5至5重量%ZrO 2,0.1至10重量%Li 2 O,1至5重量%TiO 2的玻璃陶瓷组分。 玻璃陶瓷组分具有包含在LiAlSi 2 O 6与LiAlSi 4 O 10的组成范围内的酮钙石混合晶体的主晶相。
摘要:
A glass having excellent resistance against surface damages is provided. The glass includes a content of alkaline earth oxides of at least 0.3% by weight and of P2O5 of 0.1 to 4% by weight; the glass has at least one surface that has precipitations with a mean size of 1 to 20 μm. A method is further provided and includes melting a glass batch, yielding a glass melt, and casting the glass melt onto a float bath. The glass melt is maintained on the float bath at a temperature of above 1000° C. for at least 5 minutes, and yields glass. The glass has a content of alkaline earth oxides of at least 0.3% by weight and of P2O5 of 0.1 to 4% by weight, and the glass has at least one surface that has precipitations with a mean size of 1 to 20 μm.
摘要翻译:提供了具有优异的抗表面损伤性的玻璃。 该玻璃包括至少0.3重量%的碱土金属氧化物和P 2 O 5的含量为0.1至4重量% 玻璃具有至少一个具有平均尺寸为1至20μm的沉淀的表面。 还提供了一种方法,包括熔化玻璃批料,产生玻璃熔体,以及将玻璃熔体浇铸到浮法槽上。 将玻璃熔体在高于1000℃的温度下保持在浮法浴上至少5分钟,并产生玻璃。 该玻璃的含量为至少0.3重量%,P2O5为0.1〜4重量%的碱土金属氧化物,玻璃具有至少一个平均粒径为1〜20μm的沉淀物的表面。
摘要:
A method is described for making a float glass convertible into a glass ceramic, by which a largely crystal fault-free glass can be produced. In this method the glass is cooled from a temperature (TKGmax), at which a crystal growth rate is at a maximum value (KGmax), to another temperature (TUEG), at which practically no more crystal growth occurs, with a cooling rate, KR, in ° C. min−1 according to: KR UEG KGmax ≥ Δ T UEG KGmax 100 · KGmax , wherein ΔT=TKGmax−TUEG, and KGmax=maximum crystal growth rate in μm min−1. The float glass has a thickness below an equilibrium thickness, a net width of at least 1 m and has no more than 50 crystals with a size of more than 50 μm, especially no crystals with a size of more than 10 μm, per kilogram of glass within the net width.
摘要:
The invention provides a method for producing a glass ceramic comprising the steps of melting a starting glass that is free from alkali, except for incidental contamination, and that contains at least one garnet-forming agent and at least one oxide of a lanthanoid; grinding the starting glass to produce a glass frit; molding by pressing and sintering the glass frit until at least one garnet phase containing lanthanoids is formed. A glass ceramic produced in this way may contain 5-50% by weight of SiO2, 5-50% by weight of Al2O3 and 10-80% by weight of at least one oxide selected from the group formed by Y2O3, Lu2O3, Sc2O3, Gd2O3, Yb2O3, Ce2O3, as well as 0.1-30% by weight of at least one oxide selected from the group formed by B2O3, Th2O3, and oxides of the lanthanoids, except Lu2O3, Gd2O3, Yb2O3, Ce2O3. Such a glass ceramic is suited especially for down conversion of excitation radiation in the blue and in the UV region of the spectrum.
摘要翻译:本发明提供了一种制备玻璃陶瓷的方法,包括以下步骤:熔化除了偶然污染之外不含碱的起始玻璃,并含有至少一种石榴石形成剂和至少一种镧系元素氧化物; 研磨起始玻璃以生产玻璃料; 通过压制和烧结玻璃料成型至含有镧系元素的至少一个石榴石相。 以这种方式制造的玻璃陶瓷可以含有5-50重量%的SiO 2,5-50重量%的Al 2 O 3和10-80重量%的至少一种选自由Y 2 O 3,Lu 2 O 3,Sc 2 O 3, Gd 2 O 3,Yb 2 O 3,Ce 2 O 3,以及选自B 2 O 3,Th 2 O 3的至少一种氧化物和除了Lu 2 O 3,Gd 2 O 3,Yb 2 O 3,Ce 2 O 3以外的镧系元素的氧化物的至少一种氧化物。 这种玻璃陶瓷特别适用于在光谱的蓝色和紫外区域的激发辐射的下变换。
摘要:
Transparent, dyed cook top or hob with improved color display capability, consisting of a glass ceramic with high quartz mixed crystals as predominant crystal phase, whereby the glass-ceramic contains none of the chemical refining agents arsenic oxide and/or antimony, with transmission values of greater than 0.1% in the range of the visible light within the entire wavelength range greater than 450 nm, a light transmission in the visible of 0.8-2.5% and a transmission in the infrared at 1600 nm of 45-85%.
摘要:
The invention proposes a method for producing glass ceramics which is particularly well suited as light conversion material, especially for down conversion. One initially produces a starting glass, containing (on an oxide basis) 5-50% by weight of SiO2, 5-50% by weight of Al2O3 and 10-80% by weight of at least one oxide selected from the from the group formed by Y2O3, Lu2O3, Sc2O3, Gd2O3, Yb2O3, Ce2O3, as well as 0.1-30% by weight of at least one oxide selected from the group formed by B2O3, Th2O3, and oxides of the lanthanoids, except Lu2O3, Gd2O3, Yb2O3, Ce2O3. Thereafter, the material is heated up for ceramization at a heating rate of at least 100 K/min to a temperature in the range of between 1000° C. to 1400° C. until crystallites are formed that contain a garnet phase. Thereafter, the material is cooled down to room temperature. Alternatively, controlled cooling-down from the molten state is possible.
摘要翻译:本发明提出一种特别适合作为光转换材料的玻璃陶瓷的制造方法,特别是用于下转换。 最初产生起始玻璃,其含有5-50重量%的SiO 2,5-50重量%的Al 2 O 3和10-80重量%的至少一种氧化物的起始玻璃,所述氧化物选自由Y 2 O 3 ,Lu 2 O 3,Sc 2 O 3,Gd 2 O 3,Yb 2 O 3,Ce 2 O 3,以及选自B 2 O 3,Th 2 O 3的至少一种氧化物和除了Lu 2 O 3,Gd 2 O 3,Yb 2 O 3,Ce 2 O 3以外的镧系元素的氧化物的至少一种氧化物。 此后,将材料以至少100K /分钟的加热速率加热至陶瓷化,至1000℃至1400℃的温度,直至形成含有石榴石相的微晶。 此后,将材料冷却至室温。 或者,可以从熔融状态控制冷却。
摘要:
Antiballistic armor is provided that includes a glass-ceramic component having 50 to 70 weight percent SiO2, 15 to 25 weight percent Al2O3, 0.5 to 5 weight percent ZrO2, 0.1 to 10 weight percent Li2O, 1 to 5 weight percent TiO2. The glass ceramic component has a main crystalline phase that comprises keatite mixed crystal in a compositional range of LiAlSi2O6 to LiAlSi4O10.
摘要翻译:提供了抗反射装甲,其包括具有50至70重量%SiO 2,15至25重量%Al 2 O 3,0.5至5重量%ZrO 2,0.1至10重量%Li 2 O,1至5重量%TiO 2的玻璃陶瓷组分。 玻璃陶瓷组分具有包含在LiAlSi 2 O 6与LiAlSi 4 O 10的组成范围内的酮钙石混合晶体的主晶相。