Abstract: High-quality ceramic bodies suitable for use as a substrate of electronic devices can be prepared by sintering, at an outstandingly low temperature of 1000.degree. C. or below, a binary powder mixture composed of 30-50% by weight of a non-glassy phase of aluminum oxide and 70-50% by weight of a glassy phase having a quaternary composition composed of silicon dioxide, boron oxide, aluminum oxide and one or more of alkaline earth metal oxides, of which at least 60% by weight is strontium oxide, each constituent being formulated in a specified weight fraction. The ceramic body is particularly advantageous over conventional ones, along with the high mechanical strengths and low dielectric constant, in respect of the resistance against migration of metals therethrough when the ceramic body is in contact with metal-made parts such as electrodes.

Abstract: A composition comprising an organogermanium compound represented by the formula ##STR1## wherein n is an integer of 1 or more, R is hydrogen, alkyl, --COOH, --COOR', phenyl, ##STR2## and R' is a lower alkyl and a high molecular carrier, as well as an immunity adjusting agent comprising the composition.

Abstract: Fittings for connecting columns and beams of a steel frame construction, each comprising a substantially rectangular base plate to be connected to the column by means of high strength bolts and having centrally a horizontally continuous thicker portion from which the base plate is tapered toward upper and lower edges, a horizontal protrusion projecting from the thicker portion in opposition to a flange of the beam and vertical protrusion in opposition to a web of the beam and projecting from the base plate to form with the horizontal protrusion a T-shaped protrusion.

Abstract: The electroconductive composite ceramics composed of an independent phase conglomerates having a particle diameter of at least 20.mu. and a continuous phase connecting mutually the independent phase of conglomerates. Particularly, electroconductive composite ceramics composed of (A) 50-98% by weight of an independent phase of conglomerates having a particle diameter of at least 20 which consists essentially of a phase of insulating or semiconductive ceramics having a high melting point or a mixture thereof and (B) 50-2% by weight of a continuous phase of an electroconductive substance connecting mutually the independent phase of conglomerates. The electroconductive composite ceramics exhibit stable electroconductivity-temperature characteristics at a temperature of 1000.degree. C. or higher and have excellent thermal shock resistance, mechanical strength and chemical resistance.

Abstract: Low thermally expansive, electroconductive composite sintered ceramics comprised of a phase of at least one ceramics selected from the group consisting of low thermally expansive ceramics and negatively thermally expansive ceramics, having dispersed thereinto substantially in a continuous state a phase of an electroconductive substance such as a metal.