Abstract:
Disclosed are a glass substrate for an information recording medium, having excellent scratch resistance and a light weight and having high fracture toughness, the glass substrate having a fragility index value, measured in water, of 12 nullmnullnull or less or having a fragility index value, measured in an atmosphere having a dew point of null5null C. or lower, of 7 nullmnullnull or less, or the glass substrate comprising, by mol %, 40 to 75% of SiO2, 2 to 45% of B2O3 and/or Al2O3 and 0 to 40% of Rnull2O in which Rnull is at least one member selected from the group consisting of Li, Na and K), wherein the total content of SiO2, B2O3, Al2O3 and Rnull2O is at least 90 mol %, and a magnetic information recording medium comprising a magnetic recording layer formed on the glass substrate.
Abstract translation:公开了一种用于信息记录介质的玻璃基板,具有优异的耐擦伤性和重量轻并且具有高断裂韧性,玻璃基板具有在水中测得的脆性指数值为12mum-1/2或更低的脆性指数 在露点为-5℃以下的气氛中测定为7mum-1/2以下的玻璃基板,或者摩尔%为40〜75%的SiO 2,2〜45%的B 2 O 3 和/或Al2O3和0〜40%的R'2O,其中R'为选自Li,Na和K中的至少一种),其中SiO 2,B 2 O 3,Al 2 O 3和R 2 O的总含量为 至少90摩尔%,以及包含在玻璃基板上形成的磁记录层的磁信息记录介质。
Abstract:
The lead-free optical glasses have an index of refraction (nd) between 1.49 and 1.55 and an Abbnull number (nulld) between 47 and 59. They contain (in percent by weight on an oxide basis) 60 to 70, SiO2; 0.3 to 5, Al2O3; 16 to 25, Na2O; 0 to 9, TiO2; 0 to 7, advantageously 0.1 to 2, ZrO2; 0 to
Abstract:
A glass capillary for DNA analysis is provided, which allows the DNA detection efficiency of a DNA analyzer that uses electrophoresis to be increased, and allows the DNA analyzer to have a simple structure. A glass capillary for DNA analysis has an internal hole, and each of the glass capillary and the internal hole has a rectangular cross section. Since the glass capillary and the internal hole each have a rectangular cross section, scattering of the laser beam at the surfaces of the glass capillary can be prevented and hence the transmittance of the laser beam can be increased. As a result, the detection efficiency of the electrophoretic DNA analyzer can be increased, and moreover the analyzer can be given a simple structure.
Abstract:
A glass substrate is for use in a WDM optical filter which has an optical multilayer coated on the glass substrate and is formed by glass which has a composition related to the optical multilayer so as to assure stable multiplexing/demultiplexing operation in the optical filter. The glass includes SiO2 as a glass network-former and has an average linear thermal expansion coefficient between 100×10−7/K and 130×10−7/K within a temperature range between −30° C. and +70° C. The glass may include TiO2, Al2O3, and R2O (R: alkali metal element) in addition to SiO2 and may have a hardness suitable for the optical multilayer.
Abstract translation:玻璃基板用于WDM光学滤波器,其具有涂覆在玻璃基板上的光学多层膜,并且由具有与光学多层相关的组成的玻璃形成,从而确保滤光器中的稳定的多路复用/解复用操作。 该玻璃包括SiO 2作为玻璃网络形成剂,并且在-30℃至+ 70℃之间的温度范围内具有100×10 -7 / K至130×10 -7 / K之间的平均线性热膨胀系数。玻璃可包括 TiO 2,Al 2 O 3和R 2 O(R:碱金属元素),并且可以具有适合于光学多层的硬度。
Abstract:
A glass substrate for an inorganic EL display comprises an aluminosilicate glass, contains CaO, SrO, BaO, and ZrO2 the contents of which fall within ranges of, by mass percent, 0-13% CaO, 0-13% SrO, 0-13% BaO, 0-10% ZrO2, and 0-13% CaOnullSrOnullBaOnullZrO2, and has the strain point not lower than 520null C.
Abstract translation:用于无机EL显示器的玻璃基板包括铝硅酸盐玻璃,其包含CaO,SrO,BaO和ZrO 2,其含量在质量百分比范围内,0-13%CaO,0-13%SrO,0-13 %BaO,0-10%ZrO2和0-13%CaO + SrO + BaO + ZrO2,应变点不低于520℃。
Abstract:
The invention relates to a lithium-sodium-aluminosilicate glass composition. This glass composition has a softening point of 700° C. or lower; a first temperature (1450° C. or lower) at which the glass composition exhibits a viscosity of 102 poises; a second temperature (1000° C. or lower) at which the glass exhibits a viscosity of 104 poises; and a mean thermal expansion coefficient between 30° C. and a glass transition temperature of the glass composition. This coefficient is within a range of from 90×10−7/° C. to 130×10−7/° C. The glass composition can be easily formed into a precursor of a glass article by pressing. It is possible to obtain a glass article that is chemically strengthened from the precursor by conducing alkali ion exchange.
Abstract:
In a method of manufacturing a glass substrate for a magnetic recording medium for forming a predetermined roughness, a principal surface of the glass substrate is precisely polished by the use of polishing material containing free abrasive grain. Remaining stress distribution for a portion of a polishing trace due to the free abrasive grain is generated on the surface of the glass substrate. A surface process is performed for at least the principal surface of the glass substrate by the use of hydrosilicofluoric acid. A portion having relatively high remaining distortion in the generated remaining stress distribution is decided as an island portion. The glass substrate is heated after precisely polishing before performing the surface process by the use of the hydrosilicofluoric acid.
Abstract:
The lead-free optical light flint glass material has a refractive index nd between 1.54 and 1.61 and an Abbe number nulld of between 38 and 45. It has a composition, based on oxide content, of SiO2 from 52 to 62% by weight, Al2O3 from 3 to 8% by weight, Na2O from 7 to 14% by weight, K2O from 8 to 14% by weight, TiO2 from 13 to 18% by weight, ZrO2 from 0 to 5% by weight, with at least one refining agent, if needed, in an amount suitable for the purposes of refining; and with the proviso that a sum total of Na2O and K2O present is greater than 18% by weight.
Abstract:
A glass composition comprising, in mole percent of the total composition: glass-forming compounds in a total amount of 75 to 85%, wherein said glass forming compounds comprise 40 to 65% SiO2, 10 to 20% Bi2O3 and 0.1 to 3% Al2O3, and glass modifiers in a total amount of 15 to 25%, wherein said glass modifiers comprise 1 to 23 % ZnO, 0.1 to 5% CuO, 0.1 to 5 CaO and 0.1 to 2% MgO, thick film formulations containing said composition and uses thereof.
Abstract translation:一种玻璃组合物,其占总组合物的摩尔百分数:总量为75-85%的玻璃形成化合物,其中所述形成玻璃的化合物包含40-65%的SiO 2,10-20%的Bi 2 O 3和0.1〜3%的Al 2 O 3 ,和总量为15至25%的玻璃改性剂,其中所述玻璃改性剂包含1至23%ZnO,0.1至5%CuO,0.1至5 CaO和0.1至2%MgO,含有所述组合物的厚膜配方及其用途 。
Abstract:
A glass substrate manufacturing method advantageously applicable to magnetic recording disk glass substrates, LCD glass substrates, photomasks glass substrates, or optical memory glass substrates. The method includes the steps of forming a film of a solution on at least a principal surface of a sheet glass formed using a down-drawing method, the solution containing a water soluble inorganic material and a surface-active agent; sandwiching both sides of a single sheet glass on which the film is formed or of a laminated structure of two or more sheet glasses with a densified sheet with a high flatness to pressure the single glass or laminated structure; and heating and annealing the single sheet glass or laminated structure to flatten the same. The end side of the flatten glass substrate is treated with a treating solution containing a hydrofluosilicic acid. The glass substrate is formed by chemically strengthening a glass substrate by immersing the glass substrate in a heated chemical reinforcement solution and then ion exchanging ions on the surface layer of the glass substrate with ions in the chemical reinforcement solution; removing the substrate form the chemical reinforcement solution and then annealing it to a temperature higher than the crystallization temperature of a molten salt; annealing the glass substrate at a rate at which the crystallization of the molten salt is deposited on the surface of the glass substrate; and then cleaning the surface of the glass substrate. Moreover, the glass substrate may be formed by chemically strengthening a glass substrate by immersing the glass substrate in a heated chemical reinforcement solution and then ion exchanging ions on the surface layer of the glass substrate with ions in the chemical reinforcement solution; and removing the substrate from the chemical reinforcement solution and then cleaning the surface of the glass substrate with a cleaning agent containing acid.