Abstract: A ceramic according to the present invention includes, in mass %, BN: 20.0 to 55.0%, SiC: 5.0 to 40.0%, ZrO2 and/or Si3N4: 3.0 to 60.0%. The ceramic has a coefficient of thermal expansion at ?50 to 500° C. of 1.0×10?6 to 5.0×10?6/° C., is excellent in low electrostatic properties (106 to 1014 ?·cm in volume resistivity) and free-machining properties, and is thus suitable to be used for, for example, a probe guiding member for guiding probes of a probe card, and a socket for package inspection.

Abstract: A ceramic containing, in mass %: Si3N4: 20.0 to 60.0%, ZrO2: 25.0 to 70.0%, at least one selected from SiC and AlN: 2.0 to 17.0%, where AlN is 10.0% or less, at least one selected from MgO, Y2O3, CeO2, CaO, HfO2, TiO2, Al2O3, SiO2, MoO3, CrO, CoO, ZnO, Ga2O3, Ta2O5, NiO and V2O5: 5.0 to 15.0%, wherein Fn calculated from the following equation (1) satisfies 0.02 to 0.40. This ceramic can be laser machined with high efficiency.

Abstract: A thermoelectric element-containing package according to one aspect of the present disclosure includes a thermoelectric conversion module including: a first substrate having first and second main surfaces; a second substrate having third and fourth main surfaces; and a plurality of thermoelectric elements that are sandwiched between the first and second substrates and arranged along the second main surface and the third main surface. The thermoelectric element-containing package further includes: a frame joined to the first and second substrates so as to form a hermetically sealed space surrounding the plurality of thermoelectric elements and disposed between the first substrate and the second substrate; and a placement member that is disposed on the first main surface of the first substrate or the fourth main surface of the second substrate and to which an additional device is to be connected.

Abstract: A ceramic contains, in mass percent: Si3N4: 20.0 to 60.0%, ZrO2: 25.0 to 70.0%, and one or more oxides selected from MgO, Y2O3, CeO2, CaO, HfO2, TiO2, Al2O3, SiO2, MoO3, CrO, CoO, ZnO, Ga2O3, Ta2O5, NiO, and V2O5: 5.0 to 15.0%. The ceramic has a coefficient of thermal expansion as high as that of silicon and an excellent mechanical strength, allows fine machining with high precision, and prevents particles from being produced.

Abstract: A mixed member of SiC and Si, the mixed member being formable without using a resin as a medium irrespective of its shape. To achieve the object, a feature of the mixed member of SiC and Si (SiC/Si mixed member) lies in that a SiC member (filler) in a chip form or powdery form is dispersed in a Si member (base material) having a polycrystalline structure. Further, the SiC/Si mixed member with such a feature can be configured such that a SiC coating layer is formed on a surface of the SiC/Si mixed member.

Abstract: An alumina sintered body comprising 0.01 to 1.0 mass % of one or more types selected from Ta, Nb, and V in terms of oxide thereof. The alumina sintered body may further comprise 0.01 to 1.0 mass % of Mg in terms of Mg oxide. It is particularly preferable that the alumina sintered body has an alumina purity of 99% or more. An alumina sintered body having low dielectric loss as compared with that in related art can therefore be produced at low cost.

Abstract: A ceramic contains, in mass percent: Si3N4: 20.0 to 60.0%, ZrO2: 25.0 to 70.0%, and one or more oxides selected from MgO, Y2O3, CeO2, CaO, HfO2, TiO2, Al2O3, SiO2, MoO3, CrO, CoO, ZnO, Ga2O3, Ta2O5, NiO, and V2O5: 5.0 to 15.0%. The ceramic has a coefficient of thermal expansion as high as that of silicon and an excellent mechanical strength, allows fine machining with high precision, and prevents particles from being produced.

Abstract: An alumina sintered body comprising 0.01 to 1.0 mass % of one or more types selected from Ta, Nb, and V in terms of oxide thereof. The alumina sintered body may further comprise 0.01 to 1.0 mass % of Mg in terms of Mg oxide. It is particularly preferable that the alumina sintered body has an alumina purity of 99% or more. An alumina sintered body having low dielectric loss as compared with that in related art can therefore be produced at low cost.

Abstract: A ceramic according to the present invention includes, in mass %, BN: 20.0 to 55.0%, SiC: 5.0 to 40.0%, ZrO2 and/or Si3N4: 3.0 to 60.0%. The ceramic has a coefficient of thermal expansion at ?50 to 500° C. of 1.0×10?6 to 5.0×10?6/° C., is excellent in low electrostatic properties (106 to 1014 ?·cm in volume resistivity) and free-machining properties, and is thus suitable to be used for, for example, a probe guiding member for guiding probes of a probe card, and a socket for package inspection.