Abstract: An inverter device includes first and second input terminals, a series circuit having a plurality of switch elements coupled between the first and second input terminals. Each of the switch elements is coupled in parallel with a series circuit having a diode and an inductor.

Abstract: The present invention relates to a ceramic color paste containing a glass frit, a vehicle, a heat-resistant pigment and a large-diameter heat-resistant particle, in which the large-diameter heat-resistant particle has a particle size larger than the average thickness of a dried coating film for forming a ceramic color.

Abstract: Current leads are used for connecting a power supply placed in a room-temature environment and a superconducting coil placed in an ultralow-temperature environment. The current leads includes a first current lead and a second current lead. The first current lead is made up of a room-temperature N-type thermoelectric semiconductor, a low-temperature N-type thermoelectric semiconductor, and a high-temperature superconductor. The second current lead is made up of a room-temperature P-type thermoelectric semiconductor, a low-temperature P-type thermoelectric semiconductor, and a high-temperature superconductor. At least one of the first and second current leads is formed of a functionally gradient material.

Abstract: A zirconia-base sintered body comprising a sintered substrate containing 30% by volume or more of tetragonal zirconia and a coating film disposed thereon, characterized in that the diffusion coefficient of oxygen in a material forming said coating film at no higher than 550.degree. C. is smaller than that of oxygen in said tetragonal zirconia at a temperature of no higher than said temperature.

Abstract: An interior coating material for continuous caster tundishes which consists of a mixture of 5 to 60% by weight of a lightweight magnesia aggregate having a bulk density of 2.0 or less, and 40 to 95% by weight of an aggregate which is one or more substances selected from the group consisting of electrically molten magnesia clinker, seawater magnesia clinker, burnt clinker prepared from natural magnesite, dolomite clinker and spinel clinker, plus binder, hardening agent and fibers.

Abstract: Hydraulic heat-resisting material of an improved thermal property which has high strength and high volume stability under high temperature is disclosed. The material substantially consists of 5 to 70 parts by weight of a mixture, the mixture consisting of 49.95 to 87.3% by weight of hydraulic cement, 49.95 to 9.7% by weight of amorphous silica and 0.1 to 3% by weight of a dispersing agent, and 95 to 30 parts by weight of a heat-resisting aggregate. Premold product made of the above material is also disclosed.