Abstract: The present invention relates to a ceramic coating composition contains frit, suspending agent, binder, mica and pearlescent pigment and has a viscosity of about 10 to 50 second as measured by a Zahn cup with orifice diameter of 0.108 inch.

Abstract: The present invention is directed to several embodiments of a hermetically sealed semiconductor package. One embodiment is constructed from a substrate of a first copper alloy, a cover member of a second copper alloy and a lead frame of a third copper alloy. A low melting point sealing glass composite is disposed between the cover member and the substrate for sealing the lead frame therebetween. The third copper alloy is precipitation hardenable and has excellent softening resistance at glass sealing temperatures as compared with other conventionally used alloys. In another embodiment, a clad composite having a core of the third copper alloy and cladding layer of a copper alloy having a low oxidation rate may be advantageously used for the lead frame.

Abstract: An inorganic black pigment is made by calcining raw materials such as manganese dioxide, manganese carbonate, strontium carbonate or calcium carbonate. The product is a perovskite structure made up of (a) 25-84 mol % of a manganese oxide and (b) 75-16 mol % SrO and/or CaO plus residual carbonates and mineralizers. The thus-produced black pigment is particularly advantageous in that it contains no heavy metals or highly toxic material and that it has very low oil absorption and high tinting strength.

Abstract: A lead-free low-melting frit is made by combining raw materials in amounts such that the product will have a specific oxide analysis, melting the raw materials at a temperature greater than 1000.degree. C. and cooling the thus-formed fused glass in a manner such that a frit is formed. The low-melting frit has the following oxide analysis:7-12.5 parts by weight alkali oxide selected from2-9 parts by weight Na.sub.2 O and 2-7 parts by weight Li.sub.2 O;23-34 parts by weight B.sub.2 O.sub.3 ;2-4 parts by weight Al.sub.2 O.sub.3 ;30-45 parts by weight SiO.sub.2 ;0.75-4 parts by weight F;2-4 parts by weight P.sub.2 O.sub.5 ;4-8 parts by weight ZnO; and2-5 parts by weight TiO.sub.2.These frits are durable, have an incipient fusion point less than about 450.degree. C. and a coefficient of thermal expansion less than 10.times.10.sup.-6 cm/cm/.degree.C. The frits of the present invention are particularly useful as components in vitrifiable glass decorating colors.

Abstract: The present invention is directed to orange inorganic pigment materials which are characterized by high tinctorial strengths, excellent color and thermal stability and relatively high opacity. These pigments are of inverse spinel structure and are produced by cocalcining compounds of iron and zinc with compounds of titanium, tin and/or silicon.

Abstract: Disclosed are various ceramic frits which have a unique combination of low solubility, low-melting temperature, and freedom from lead oxide. They are formed from selected compositions in the alkali--ZnO--Al.sub.2 O.sub.3 --B.sub.2 O.sub.3 --P.sub.2 O.sub.5 --SiO.sub.2 --TiO.sub.2 --F system.

Abstract: Although free of CoO, the present spinel ceramic pigments have intensity of black coloration comparable to those using cobalt; they are nickel-rich, selected compositions in the NiO-MnO-CuO-Fe.sub.2 O.sub.3 -Cr.sub.2 O.sub.3 -Mn.sub.2 O.sub.3 -V.sub.2 O.sub.3 -Al.sub.2 O.sub.3 system, and they can be used with glaze frits containing up to about 10% ZnO.

Abstract: Disclosed are low-expansion, translucent, semicrystalline, whiteware ceramic bodies containing cordierite as the crystalline phase and advantageously having translucency suitable for use in fine dinnerware applications. The ceramic bodies can be fired in commercial kilns which characteristically require at least a 100.degree.F firing range. The raw materials are specified proportions of talc containing low levels of iron oxide and titania; kaolin clay containing low levels of iron oxide and titania; alumina; and oxide-producing materials of akali or alkaline-earth aluminosilicates and certain oxides proportioned to yield a fired ceramic body composition in the range of 51.5 to 58 parts by weight SiO.sub.2, 28 to 36 parts by weight Al.sub.2 O.sub.3, 10 to 17 parts by weight MgO, and 4 to 10 parts by weight of certain other oxides wherein the parts by weight of SiO.sub.2 + Al.sub.2 O.sub.3 + MgO = 100 weight parts as a basis.