A marking composition for forming marks or indicia on a substrate is provided for laser marking applications. The composition includes a glass frit, a carrier, and absorber particles. The glass frit includes alkali metal oxides, glass forming oxides, and one or more transition metal oxides. The glass frit is devoid of at least one of bismuth and zinc.

A marking composition for forming marks or indicia on a substrate is provided for laser marking applications. The composition includes a glass frit, a carrier, and absorber particles. The glass frit includes alkali metal oxides, glass forming oxides, and one or more transition metal oxides. The glass frit is devoid of at least one of bismuth and zinc.

An article including a glass having that includes SiO.sub.2, Al.sub.2O.sub.3, and B.sub.2O.sub.3 and least one of Li.sub.2O, Na.sub.2O, K.sub.2O, MgO, CaO, SrO, BaO, SnO.sub.2, ZnO, La.sub.2O.sub.3, F, and Fe.sub.2O.sub.3, wherein the glass includes a dielectric constant of about 10 or less and/or a loss tangent of about 0.01 or less, both as measured with signals at 10 GHz.

Glasses comprising SiO.sub.2, Al.sub.2O.sub.3, and P.sub.2O.sub.5 that are capable of chemical strengthened by ion exchange and having high damage resistance. These phosphate-containing glasses have a structure in which silica (SiO.sub.2) is replaced by aluminum phosphate (AlPO.sub.4) and/or boron phosphate (BPO.sub.4).

Glasses comprising SiO.sub.2, Al.sub.2O.sub.3, and P.sub.2O.sub.5 that are capable of chemical strengthened by ion exchange and having high damage resistance. These phosphate-containing glasses have a structure in which silica (SiO.sub.2) is replaced by aluminum phosphate (AlPO.sub.4) and/or boron phosphate (BPO.sub.4).

Glass ceramic material for the production of synthetic stones in fashion jewellery and jewellery, having excellent mechanical properties, chemical and heat resistance, harmless due to absence of lead, arsenic and cadmium compounds, available in a broad scale of colour designs, imitating faithfully natural precious stones thanks to high content of spinel crystalline phase and lowered content of SiO.sub.2, consisting of (in weight %):

20-40% SiO.sub.2,
1.5-10% B.sub.2O.sub.3,
20-35% Al.sub.2O.sub.3,
0.1-20% MgO,
0.1-20% ZnO,
the content of MgO+ZnO being at least 10%,
preferably also
0-15% TiO.sub.2,
0.1-15% ZrO.sub.2,
the content of TiO.sub.2+ZrO.sub.2 being at least 5%,
more preferably also
0-20% of colouring additives in the form of CoO, NiO, CuO, Fe.sub.2O.sub.3, MnO.sub.2, Cr.sub.2O.sub.3, V.sub.2O.sub.5, Pr.sub.2O.sub.3, CeO.sub.2, Nd.sub.2O.sub.3, Er.sub.2O.sub.3, AgO and Au.

A low melting point tin phosphate-based glass frit contains, in mol %, 15-75% of SnO, 0-40% of SnF2, 10-50% of P2O5, 0-30% of ZnO, 0-5% of Al2O3, 0-30% of B2O3, 0-5% of In203, 0-5% of BaO, and 0-5% of SiO2, does not contain Pb, and exhibits a temperature difference of 50° C. or less between the glass transition point to the glass softening point. The glass frit has a low softening point temperature and a conventional glass transition point temperature without using a substance that places a burden on the environment such as lead.

To provide a thick film resistor paste for a resistor having a smaller resistance change rate and excellent surge resistance, a thick film resistor using the thick film resistor paste, and an electronic component provided with the thick film resistor. A thick film resistor paste comprises an organic vehicle and a conductive substance-containing glass powder comprising ruthenium oxide and lead ruthenate, the conductive substance-containing glass powder comprises 10 to 70 mass% of conductive substances, a glass composition of the conductive substance-containing glass powder comprises 3 to 30 mass% of silicon oxide, 30 to 90 mass% of lead oxide, 5 to 50 mass% of boron oxide relative to 100 mass% of glass components, and, a combined amount of silicon oxide, lead oxide and boron oxide by mass% is 50 mass% or more relative to 100 mass% of the glass components.

The present invention relates to a chemically strengthened optical component comprising an optical glass, having a depth of layer (DoL) of 1.0 to 50.0 μm, wherein the optical glass has a refractive index n.sub.d of at least 1.65, preferably at least 1.70, and wherein the optically glass comprises at least 5 mol % of a total of Li.sub.2O, Na.sub.2O and K.sub.2O or a combination of two or more thereof. The invention furthermore relates to a method for preparing the chemically strengthened optical component and the use thereof.

The present invention relates to a chemically strengthened optical component comprising an optical glass, having a depth of layer (DoL) of 1.0 to 50.0 μm, wherein the optical glass has a refractive index n.sub.d of at least 1.65, preferably at least 1.70, and wherein the optically glass comprises at least 5 mol % of a total of Li.sub.2O, Na.sub.2O and K.sub.2O or a combination of two or more thereof. The invention furthermore relates to a method for preparing the chemically strengthened optical component and the use thereof.