摘要:
A ceramic heater element 10 includes an insulating substrate 101, and a heating resistor 102 embedded in the insulating substrate 101. The insulating substrate 101 contains a main phase formed of β-SiAlON or a multiphase SiAlON of β-SiAlON and α-SiAlON; a grain boundary phase containing a rare earth element; and a silicide of at least one species selected from among Cr, W, Mo, V, and Fe. The heating resistor 102 contains a main phase formed of an electrically conductive compound containing at least one species selected from among silicide, nitride, and carbide of Mo, and silicide, nitride, and carbide of W; β-SiAlON or a multiphase SiAlON of β-SiAlON and α-SiAlON; and a grain boundary phase containing a rare earth element.
摘要:
There is provided a gas sensor element for detecting the concentration of a specific gas component in gas under measurement, which includes a plate-shaped element body and a porous protection layer. The element body has, at one end portion thereof, a gas sensing portion formed with a solid electrolyte substrate and a pair of electrodes. The porous protection layer has a porous structure formed of ceramic particles and surrounds at least the circumference of the one end portion of the element body. In the present invention, the porous protection layer has an inner region, an intermediate region and an outer region laminated together in order of mention from the element body toward the outside. The intermediate region has a porosity lower than those of the inner and outer regions. There is also provided a gas sensor with such a gas sensor element.
摘要:
A relay includes a pair of fixed terminals arranged to respectively have fixed contacts, a movable contact member arranged to have a pair of movable contacts, a driving structure operated to move the movable contact member and a magnet arranged to extinguish an arc. The movable contact member has a center section located between the pair of movable contacts. The magnet is placed on at least one of a first side and a second side that face each other across a predetermined face including the movable contact member and the pair of fixed terminals electrically connected by the movable contact member. The magnet is arranged to have a magnitude relation that a center area where the center section is located has a lower magnetic flux density than movable contact portions where the pair of movable contacts are located.
摘要:
There are provided a piezoelectric ceramic composition that includes a bismuth layer-structured compound, which contains Na, Bi, Co and Ln (lanthanoide), as a main component and a piezoelectric ceramic composition that includes a compound, which contains Na, Bi, Ti, Co and Ln (lanthanoide) and has a Na0.5Bi4.5Ti4O15 type crystal structure, as a main component, wherein the piezoelectric ceramic composition has an atomic ratio of 0
摘要:
A spark plug that is equipped with an insulator that has a stem portion on a front end side, a center electrode, and a main metal member that retains the insulator at an engaging projection portion, wherein an inner diameter DIN of the engaging projection portion, the maximum outer diameter dOUT of the stem portion, which faces an inner circumferential surface of the engaging projection portion, its inner diameter dIN, and dielectric constant ∈ of the insulator satisfy the condition of “(DIN−dOUT)/2≦0.40 (mm)”, “(dOUT−dIN)/2≦1.65 (mm)”, and “∈≧9.4”.
摘要:
A spark plug exhibits a satisfactory withstand voltage characteristic and sufficient mechanical strength in a high temperature environment exceeding 700° C. The spark plug has a center electrode, an insulator, and a ground electrode, characterized in that the insulator is formed of an alumina-based sintered material containing an Si component, a Group 2 element (2A) component, and a rare earth element (RE) component; that the alumina-based sintered material has an RE-β-alumina crystal phase; and that the mean crystal grain size DA(RE) of the RE-β-alumina crystal phase and that of alumina DA(Al) satisfy the following relationship (1): 0.2≦DA(RE)/DA(Al)≦3.0.
摘要:
A ceramic heater (12) includes a substrate (60) and a resistor element (30) buried in the substrate (60). The resistor element (30) includes a heat-generating portion (33), lead portions (31), and intermediate portions (40) located between the heat-generating portions (33) and the lead portions (31). The intermediate portions (40) are formed such that, when cross sections at arbitrary two points P1 and P2 along the axis XA direction are compared, both the diameter CL of an imaginary circumscribed circle CG containing cross sections of the resistor element 30 and the total cross sectional area HS of the cross sections become small in the front end side cross section as compared with those in the rear end side cross section.
摘要:
A thermistor element includes a thermistor body and a reduction-resistant coating covering the thermistor body. The thermistor body contains a perovskite phase of perovskite-type crystal structure represented by the composition formula: ABO3 where A is at least one A-site element and B is at least one B-site element. The reduction-resistant coating is formed of a complex oxide containing one or more of the at least one A-site element and one or more of the at least one B-site element.
摘要:
A piezoceramic material according to an embodiment of the present invention has a composition represented by Pbm{Zr1-x-y-zTixSny(Sb1-nNbn)z}O3 where 1.000≦m≦1.075, 0.470≦x
摘要翻译:根据本发明的实施方案的压电陶瓷材料具有由Pbm {Zr1-xy-zTixSny(Sb1-nNbn)z} O3表示的组成,其中1.000 <= m <= 1.075,0.470 <= x <0.490,0.020 < y <= 0.040,0
摘要:
A ceramic sintered body comprising from 90 to 99.8% by volume of cordierite and from 0.2 to 10% by volume of mullite based on 100% by weight of a total sum of the contents of the cordierite and the mullite, and having a density of 2.48 g/cm3 or more.
摘要翻译:一种陶瓷烧结体,其以堇青石和富铝红柱石的总量的100重量%为基准,含有90〜99.8体积%的堇青石和0.2〜10体积%的莫来石,并且密度为2.48 g / cm 3以上。