Methods for making articles comprising crystalline material. Exemplary articles made by a method described herein include electronics enclosure (e.g., a watch case, cellular phone case, or a tablet case).

A crucible structure is adapted for manufacturing a silicon crystal structure. The crucible structure includes a crucible body and a release coating layer. A material of the crucible body includes silicon dioxide. The release coating layer directly covers the crucible body, and a material of the release coating layer includes barium silicate. The barium silicate is a continuous film to contact the silicon crystal structure, and a thickness of the release coating layer is between 35 m and 350 m.

Provided is a glass composition that exhibits greater Faraday effect than ever before. A glass composition contains 48% or more of Tb.sub.2O.sub.3 (exclusive of 48%) in % by mole.

The present specification relates to a composition for a solid oxide fuel cell sealant including B.sub.2O.sub.3 in 50 mol % to 85 mol %, wherein an adhesion temperature at which viscosity becomes 10.sup.4 dPa.Math.s is in a range of 750 C. to 850 C., a sealant using the same and a method for manufacturing the same.

Ceramics and glass-ceramics have low and/or negative coefficients of thermal expansion. Crystalline phases of the formula AM.sub.2Si.sub.2-yGe.sub.yO.sub.7 (A=Sr and Ba and M=Zn, Mg, Ni, Co, Fe, Cu, Mn, with Sr, Ba and Zn necessarily having to be present) can be produced by conventional ceramic processes or by crystallization from glasses. The compositions form solid solutions, where the elements indicated as component M can be replaced by one another in virtually any concentration but the concentration of Zn must always be at least 50% of the sum of all components indicated under M. The stoichiometry of these silicates and also their structure can differ to a greater or lesser extent.

Method for manufacturing slab articles from a mix, comprising the steps of a) preparing a mix comprising a preponderant amount of a glass frit and a binder, b) distributing the mix in a support, c) compacting the mix, d) drying the mix, e) sintering the mix and f) cooling the article. The glass frit comprises a weight amount of silica (SiO.sub.2) comprised between 62% and 68%, a weight amount of alumina (Al.sub.2O.sub.3) comprised between 3% and 5%, a weight amount of potassium oxide (K.sub.2O) comprised between 3% and 5%, a weight amount of calcium oxide (CaO) comprised between 18% and 26% and a weight amount of magnesium oxide (MgO) comprised between 1% and 4% The cooling step is performed in a controlled manner by modulating the cooling speed in a temperature range not greater than 1.160 C. and not less than 1.000 C. in order to perform the at least partial devitrification and crystallization of the glass frit. The invention also relates to a glass frit and an article in slab form.

Provided is a glass material that can satisfy both high Faraday effect and high light transmittance at wavelengths used. A glass material containing, in terms of % by mole of oxide, more than 40% Tb.sub.2O.sub.3 and having a percentage of Tb.sup.3+ of 55% by mole or more relative to a total content of Tb.

Provided is a wavelength conversion member that can reduce strain under stress occurring at the interface between a substrate and a phosphor layer and is therefore less susceptible to breakage during use. The wavelength conversion member 1 comprises a substrate 10 and a phosphor layer 20 bonded on the substrate 10, the phosphor layer 20 including inorganic phosphor powder 22 dispersed in a glass matrix 21. In a temperature range of 30? C. to a setting point of the phosphor layer 20, a relation ?10?10.sup.?7?(?.sub.1??.sub.2)?10?10.sup.?7 (/? C.) is satisfied where ?.sub.1 represents a coefficient of thermal expansion of the substrate 10 and ?.sub.2 represents a coefficient of thermal expansion of the phosphor layer 20. The setting point is defined by Tf?(Tf?Tg)/3 (where Tg represents a glass transition point and Tf represents a deformation point).

The development of cracks or breakage in a glass material during production of the glass material by a containerless levitation technique is reduced. A glass material is obtained by heating a levitated block 12 of glass raw material to melting by irradiation of the block 12 of glass raw material with laser light to thus obtain a molten glass and then cooling the molten glass. A first irradiation step and a second irradiation step are performed. In the first irradiation step, the levitated block 12 of glass raw material is heated to melting by irradiating the block 12 of glass raw material with the laser light. In the second irradiation step, an intensity of the laser light being applied to the molten glass is reduced and irradiation with the laser light is then stopped.

A layered glass structure includes an inner layer having opposing major surfaces. The inner layer includes a first glass powder and a first inorganic filler. The inner layer has a first coefficient of thermal expansion (CTE) and a first transition temperature (Tg). An outer layer is disposed on each opposing major surface of the inner layer. The outer layer includes a second glass powder and a second inorganic filler. The outer layer has a second CTE and a second Tg. A CTE gap between the first CTE and the second CTE is between 10?10.sup.?7/? C. and 30?10.sup.?7/? C. A difference between the first Tg and the second Tg is 10? C. or less.