摘要:
A method of dealkalizing a glass body that contains at least one alkali metal ion as either an impurity or an intentionally added constituent. The method involves intimately contacting the glass body with a hydrogen-ion-producing anode and an oxide receptor for the alkali metal ion as a cathode and exposing the glass body and electrode assembly to hydrogen while the assembly is at an elevated temperature.
摘要:
A chemically strengthened glass having a compressive stress layer formed in a surface layer thereof according to an ion exchange method, in which the glass has a surface roughness (Ra) of 0.20 nm or higher, a hydrogen concentration Y in a region to a depth X from an outermost surface of the glass satisfies the following relational equation (I) at X=from 0.1 to 0.4 (μm), a surface strength F (N) measured by a ball-on-ring test under the following conditions is (F≧1500×t2) relative to a sheet thickness t (mm) of the glass, and a surface of the glass has no polishing flaw: Y=aX+b (I) in which meanings of respective symbols in the equation (I) are as follows: Y: hydrogen concentration (as H2O, mol/L); X: depth from the outermost surface of the glass (μm); a: −0.270 to −0.005; and b: 0.020 to 0.220.
摘要:
Articles formed of lead glass or crystal are treated in order to minimize the tendency for the article to leach lead or other heavy metals into products, such as alcohols or acidic foods, placed in contact therewith. In a preferred embodiment, flasks formed of glass containing between about 12% and 40% by weight lead oxide are provided with a thin layer or slip of kaolin, and heated at a temperature and for a time sufficient to exchange lead ions in the flask with ions other than lead in the kaolin layer. Preferably, the layer is applied as a thixotropic barbotin (slip) of pure hydrated aluminum silicate, and coated flasks are exposed to a temperature of between about 300.degree. C. and the strain point of the glass forming the flask and for a time ranging between about 3 and about 6 hours; rapid heating and cooling is avoided. Following the heating step, the resulting silico-aluminous crust on the surface is removed to leave a silico-aluminous diffusion barrier in the treated surface of the flask which opposes migration or drift of lead ions in the flask into a product, such as an alcohol or food, placed into contact with the treated ("cemented") surface.
摘要:
LOW-EXPANSION CERAMIC AND GLASS-CERAMIC ARTICLES MANUFACTURED FROM BETA-SPODUMENE LI2O3-AL2O3-SIO2 COMPOSITIONS USING A H+$LI+ ION-EXCHANGE PROCESS WHICH PRODUCES A HYDROXY-ALUMINOSILICATE PHASE CONVERTIBLE BY APPROPRIATE HEAT TREATMENT TO DESIRABLE ALUMINOSILICATE PHASES ARE DESCRIBED. THE LOW-EXPANSION CERAMIC AND GLASS-CERAMIC ARTICLES ARE USEFUL FOR CERTAIN HIGH-TEMPERATURE APPLICATIONS WHERE THE REACTIVITY OF LITHIUM ALUMINOSILICATES PRECLUDES THEIR USE.
摘要:
A method of manufacturing a strengthened glass substrate, the method including: thermoforming a glass substrate, wherein a surface of the glass substrate includes defective depressions generated by the thermoforming; forming a silica rich layer by adding an acid to the surface of the glass substrate including the defective depressions generated by the thermoforming; removing the silica rich layer and a portion of the defective depressions by cleaning the surface of the glass substrate on which the silica rich layer is formed with an alkali; and eliminating the remaining portion of the defective depressions by polishing the surface of the glass substrate including the remaining portion of the defective depressions.
摘要:
The present invention relates to a method, a device for implementing the method, and a flask obtained by said method for passivating the inner wall of a glass container capable of containing a pharmaceutical grade material. To treat or inhibit the inner surface of the container, said inner surface of the container is treated via ion exchange between the container and an aqueous extraction liquid such that the measured hydrolytic resistance of said surface is divided by at least two.
摘要:
A chemically strengthened glass having a compressive stress layer formed in a surface layer thereof according to an ion exchange method, in which a surface of the glass has polishing flaws, the glass has a texture direction index (Stdi) of 0.30 or more, a hydrogen concentration Y in a region to a depth X from an outermost surface of the glass satisfies the following relational equation (I) at X=from 0.1 to 0.4 (μm), and a surface strength F (N) measured by a ball-on-ring test is (F≧1400×t2) relative to a sheet thickness t (mm) of the glass: Y=aX+b (I) in which meanings of respective symbols in the equation (I) are as follows: Y: hydrogen concentration (as H2O, mol/L), X: depth from the outermost surface of the glass (μm), a: −0.300 or more, and b: 0.220 or less.
摘要:
An object of the present invention is to provide a method of manufacturing a glass substrate containing alkali metals. A glass substrate manufactured by the method exhibits excellent performances including durability by virtue of suppressing elution of alkali metals.A method comprises a step of immersing a glass material in an aqueous solution containing a formate to suppress elution of component of the glass material.
摘要:
In a process for producing aluminous keatite ceramics by the hydrogen-for-lithium ion-exchange treatment of non-porous glass-ceramics, the efficiency of the lithium extraction step is substantially improved if beta-spodumene glass-ceramics having an Al.sub.2 O.sub.3 :modifying oxide ratio not exceeding about 1:1 are selected as starting materials.
摘要翻译:在通过无孔玻璃陶瓷的氢锂离子交换处理生产铝质的钴白石陶瓷的方法中,如果具有Al 2 O 3:改性氧化物的β-锂辉石玻璃陶瓷,锂提取步骤的效率显着提高 比例不超过约1:1作为起始材料。