An object of the present invention is to provide a resistive composition that can form a thick film resistor excluding a toxic lead component from a conductive component and glass and having characteristics equivalent to or superior to conventional resistors in terms of, in a wide resistance range, resistance values, TCR characteristics, current noise characteristics, withstand voltage characteristics and the like. The resistive composition of the present invention includes: ruthenium-based conductive particles including ruthenium dioxide; a glass frit that is essentially free of a lead component; and an organic vehicle, wherein the glass frit is a glass frit which is constituted such that in a case where a fired product of a mixture of the glass frit and the ruthenium dioxide has in a range of 1 k/ to 1 M/, the fired product exhibits a temperature coefficient of resistance in a plus range.

A filler that can suppress thermal expansion of a glass composition with a small amount thereof added and is also excellent in terms of flowability when the glass composition is melted, and a glass composition containing the filler are provided. There is also provided a process for producing a hexagonal phosphate-based compound that can be suitably used as the filler using a simple, industrially advantageous method. The filler of the present invention contains a hexagonal phosphate-based compound that has a purity of 90% or higher and is represented by the following Formula 1, the filler having a content of an ionic compound that is no greater than 1.0 wt %,
K.sub.aZr.sub.b(PO.sub.4).sub.3(1) wherein, in Formula 1, a is a positive number of from 0.8 to 1.2 and b is a positive number satisfying a+4b=9.

Embodiments are directed to glass frits containing phosphors that can be used in LED lighting devices and for methods associated therewith for making the phosphor containing glass frit and their use in glass articles, for example, LED devices.

A conversion element, a component and a method for producing the component are disclosed. In an embodiment the conversion element includes a phosphor configured to convert electromagnetic primary radiation into electromagnetic secondary radiation and a glass composition as matrix material in which the phosphor is embedded. The glass composition has the following chemical composition: at least one tellurium oxide with a proportion of 65 mole % as a minimum and 90 mole % as a maximum, R.sup.1O with a proportion of between 0 mole % and 20 mole %, at least one M.sup.1.sub.2O with a proportion of between 5 mole % and 25 mole %, at least one R.sup.2.sub.2O.sub.3 with a proportion of between 1 mole % and 3 mole %, M.sup.2O.sub.2 with a proportion of between 0 mole % and 2 mole %, and R.sup.3.sub.2O.sub.5 with a proportion of between 0 mole % and 6 mole %.

A method of manufacturing a polarizing glass sheet includes subjecting, while heating, a glass preform sheet containing metal halide particles to down-drawing, to thereby provide a glass member having stretched metal halide particles dispersed in an aligned manner in a glass matrix, and subjecting the glass member to reduction treatment to reduce the stretched metal halide particles, to thereby provide a polarizing glass sheet. A shape of the glass preform sheet during the down-drawing satisfies a relationship of the following expression:

L.sub.1/W.sub.11.0

where L.sub.1 represents a length between a portion in which a width of the glass preform sheet has changed to 0.8 times an original width and a portion in which the width of the glass preform sheet has changed to 0.2 times the original width W.sub.0, and W.sub.1 represents a length equivalent to 0.5 times the original width W.sub.0 of the glass preform sheet.

A spark plug resistance element that includes at least one inorganic amorphous oxide and at least one first inorganic crystalline oxide having a relative dielectric permittivity of at most 15. A spark plug that includes at least one spark plug resistance element is also described.

Provided are: a production method for a patterned phosphorescent body capable of producing a patterned phosphorescent body with excellent light emission (phosphorescent) performance through simple and easy production processes; a patterned phosphorescent body, and an evacuation guide sign. A mixture obtained by mixing at least a phosphorescent material and a glass material is filled in a mold and the mixture is press-molded so as to provide a planar part (10), thereby to create a molded body. The molded body is baked and slowly cooled, and then transfer paper of a water transfer type is attached to a surface of the planar part (10) of the baked molded body (4) and re-baking is performed at a temperature lower than a baking temperature of the molded body to impress a pattern (11) on the transfer paper.

A method of manufacturing a glass-phosphor composite is disclosed. The method comprises: preparing rare earth ion-containing parent glass; mixing the rare-earth ion-containing parent glass in a power state with a phosphor in a powder state; and providing a glass-phosphor composite using the powder mixture of the rare earth ion-containing parent glass and the phosphor, wherein the mixing includes mixing the rare earth ion-containing parent glass in the powder state with the phosphor in the powder state so that the phosphor in the glass-phosphor composite is in an amount of 5 wt % to 30 wt %, and the preparing includes using a glass frit having a glass transition point of 300 C. to 800 C. and a sintering temperature of 200 C. to 600 C.

Embodiments are directed to glass frits containing phosphors that can be used in LED lighting devices and for methods associated therewith for making the phosphor containing glass frit and their use in glass articles, for example, LED devices.

A method includes forming a glassy article. The glassy article includes a first glassy layer and a second glassy layer adjacent to the first glassy layer. The second glassy layer includes a photosensitive glass. The glassy article is exposed to radiation to form an exposed glassy article. The exposed glassy article is subjected to a heat treatment, whereby a plurality of inclusions is formed in the photosensitive glass of the second glassy layer.