Abstract: A microchemical chip includes a base having a channel for causing fluids to-be-treated to flow therethrough, and supply portions connected to the channel, for causing the fluids to-be-treated to flow into the channel, respectively. In the microchemical chip, a plurality of fluids to-be-treated are respectively caused to flow from the supply portions into the channel, and the plurality of fluids to-be-treated caused to flow in are merged to be subjected to chemical reactions. In the microchemical chip, heaters are formed for heating the fluid to-be-treated flowing through supply channels of the supply portions.

Abstract: A microchemical chip includes a base including a channel for causing a fluid to-be-treated to flow therethrough, supply portions connected to the channel, for causing the fluids to-be-treated to flow therefrom into the channel, respectively, and a collection portion from which a fluid in the channel is drawn to the outside. A plurality of fluids to-be-treated are respectively caused to flow from the supply portions into the channel, and the plurality of fluids to-be-treated caused to flow in are merged and subjected to a predetermined treatment, and then the treated fluid is drawn from the collection portion to the outside. In this microchemical chip, the base is formed by attaching a base body made of ceramics and a lid made of glass, and electrodes that are used for capillary migration are formed by being sintered simultaneously with the base body.

Abstract: High-frequency ceramics containing SiO2, Al2O3, MgO, ZnO and B2O3 as constituent components, said ceramics comprising: 30 to 50% by weight of a crystal phase containing ZnO and Al2O3; 5 to 15% by weight of a crystal phase containing SiO2 and MgO; and 40 to 60% by weight of an amorphous phase comprising substantially SiO2 or SiO2 and B2O3; wherein the content of the SiO2 crystal phase is suppressed to be not larger than 6% by weight. The ceramics has a dielectric loss at 60 GHz of not larger than 15×10−4, exhibiting excellent high-frequency characteristics, and is very useful as an insulating substrate for the wiring boards that deal with high-frequency signals.

Abstract: High-frequency ceramics containing SiO2, Al2O3, MgO, ZnO and B2O3 as constituent components, said ceramics comprising: 30 to 50% by weight of a crystal phase containing ZnO and Al2O3; 5 to 15% by weight of a crystal phase containing SiO2 and MgO; and 40 to 60% by weight of an amorphous phase comprising substantially SiO2 or SiO2 and B2O3; wherein the content of the SiO2 crystal phase is suppressed to be not larger than 6% by weight. The ceramics has a dielectric loss at 60 GHz of not larger than 15×10−4, exhibiting excellent high-frequency characteristics, and is very useful as an insulating substrate for the wiring boards that deal with high-frequency signals.

Abstract: Wiring substrate including an insulating substrate made of glass ceramics and having Young's modulus of 120 GPa or less, and a wiring circuit layer made of a high-purity metal conductor in concentration of 99% by weight or more formed on the surface of the insulating substrate and/or inside thereof. This wiring substrate may be a multi-layer wiring substrate that has a plurality of wiring circuit layers. The wiring circuit layer is preferably made of a metal foil.

Abstract: A piezoelectric ceramic composition comprising a perovskite compound which contains, as metal components, Pb, Sr, Zr, Ti, Nb, Cr, Y, Co and at least one element selected from La, Gd, Nd, Sm and Pr, and may further contain Sb or Na, wherein when the composition formula is expressed as,(Pb.sub.1-x-.alpha.-y Sr.sub.x Na.sub..alpha. M.sub.y).sub.a [(Nb.sub.b Y.sub.c Cr.sub.d Co.sub.e Sb.sub..beta.).sub.f Ti.sub.g Zr.sub.1-f-g ]O.sub.3,wherein M is at least one element selected from La, Gd, Nd, Sm and Pr, then, x, y, a, b, c, d, e, f, g, .alpha. and .beta. satisfy the following relationships, 0.005.ltoreq.x.ltoreq.0.08, 0.002.ltoreq.y.ltoreq.0.05, 0.95.ltoreq.a.ltoreq.1.05, 0.47.ltoreq.b.ltoreq.0.70, 0.02.ltoreq.c.ltoreq.0.31, 0.11.ltoreq.d.ltoreq.0.42, 0.01.ltoreq.e.ltoreq.0.12, 0.02.ltoreq.f.ltoreq.0.15, 0.46.ltoreq.g.ltoreq.0.52, 0.ltoreq..alpha..ltoreq.0.005, 0.ltoreq..beta..ltoreq.0.13, and b+c+d+e+.beta.=1.00.

Abstract: A piezo-electric ceramic composition which is favorably used for such applications as ceramic filter, vibrator applying ultrasonic waves, piezo-electric buzzer, piezo-electric ignition unit, ultrasonic wave motor, piezo-electric fan and piezo-electric sensors such as acceleration sensor, knocking sensor, AE sensor, etc. and is particularly used as a member for constituting a piezo-electric actuator. The piezo-electric ceramic composition is a composite perovskite compound which contains, as metal components, Pb, Zr, Ti, Zn, Sb as well as Sr and Ba, or Pb, Zr, Ti, Zn, Sb and at least either one or Sr or Ba, and Ni and Te, wherein when the composition by the molar ratio of metal elements is expressed by the following general formula (1),Pb.sub.1-x-y Sr.sub.x Ba.sub.y (Zn.sub.1/3 Sb.sub.2/3).sub.a Zr.sub.b (Ni.sub.1/2 Te.sub.1/2).sub.c Ti.sub.1-a-b-c O.sub.3 (1)x, y, a, b and c satisfy the following relationships,0.ltoreq.x.ltoreq.0.140.ltoreq.y.ltoreq.0.140<x+y0.01.ltoreq.a.ltoreq.0.120.43.ltoreq.b.ltoreq.0.

Abstract: A multilayer substrate with inner capacitors comprising a dielectric layer sandwiched between upper and lower insulating layers, a couple of printed electrodes in desired patterns within the thickness of the dielectric layer so as to form each capacitor at the portion of the dielectric layer corresponding to the electrodes, and a couple of leading terminals on one surface of the insulating layer, which communicate with the electrodes, the multilayer substrate being characterized in that the dielectric layer is composed of a ceramic composition mainly comprising MTiO.sub.3 -based ceramics (M represents one or several of Ba, Ca, Mg, La, Sr and Nd) and the insulating layer is composed of a ceramic composition mainly comprising MgO-SiO.sub.2 -CaO-based ceramics, which is defined by an area surrounded by the lines connecting points A, B, C, D, E, F and G as shown in FIG. 1 and listed below, wherein X, Y and Z respectively represent weight percent values of MgO, SiO.sub.2 and CaO at points A, B, C, D, E, F and G.

Abstract: Disclosed is a slider for a magnetic head, which is composed of a sintered body of a three-component or four-component composition comprising TiO.sub.2, CaO and ZnO or TiO.sub.2, CaO, ZnO and ZrO.sub.2. This sintered body has a texture in which the ZnTiO.sub.4 phase or a combination of the ZnTiO.sub.4 phase and CaZrTi.sub.2 O.sub.7 phase is dispersed in the CaTiO.sub.3 phase. The sintered body is excellent in the cutting property and the chipping resistance characteristic.