摘要:
A monolithic type varistor in which a plurality of inner electrodes are arranged in a sintered body composed of semiconductor ceramics so as to be overlapped with each other while being separated by semiconductor ceramic layers. The plurality of inner electrodes are electrically connected to first and second outer electrodes formed on both end surfaces of the sintered body. One or more non-connected type inner electrodes are arranged between adjacent ones of the plurality of inner electrodes and are not electrically connected to the outer electrodes, each of the non-connected type inner electrodes being spaced apart from each adjacent inner electrode or non-connected type inner electrode while being separated therefrom by a semiconductor ceramic layer. Voltage non-linearity is obtained by Schottky barriers formed at the interface of the inner electrode and the semiconductor ceramic layer and the interface of the non-connected type inner electrode and the semiconductor ceramic layer. The value of the number of grain boundaries between semiconductor particles in at least one semiconductor ceramic layer is two or less.
摘要:
Respective first end portions of first and second internal electrodes are exposed at respective end surfaces of a varistor body, which is in the form of a rectangular parallelepiped. These end surfaces of the varistor body are covered with low resistance parts which include ceramic material in order to prevent the internal electrodes from decomposition. External electrodes are formed on the low resistance parts, so as, to be electrically connected with corresponding ones of the internal electrodes through the low resistance parts.
摘要:
A dielectric ceramic composition having a high dielectric constant. The dielectric ceramic composition is sinterable at a low sintering temperature and has superior electrical and temperature characteristics. The dielectric ceramic composition comprises 100 parts by weight of a dielectric ceramic component represented by the general formula Ba{(CoxZn1−x)yNb1−y}zOw, in which, on a molar basis, 0
摘要:
A complex oxide ceramic sintered body has a perovskite-type crystal structure and is represented by a general formula: (La1-xSrx)a(Cr1-y-zAlyCoz)bO3, where x+z≧0.06; z≧0.02; x+y+3z≦0.25; 2x+3y+5z≧0.40; x+y≧0.12; and 1.00≦b/a≦1.04. The sintered body has a relative density of about 94% or more and the bending strength of about 15 kgf/mm2 or more both at room temperature and at room temperature after the sintered compact is treated for 24 hours in an atmosphere of humidified hydrogen having an oxygen partial pressure of 10−18 atm at 1,000° C. The sintered body further has a lattice volumetric expansion coefficient of about 0.3% or less at room temperature after treated for 24 hours in an atmosphere of humidified hydrogen having an oxygen partial pressure of 10−18 atm at 1,000° C., an average thermal expansion coefficient in a range of about 9.8 to 11.0×10−6 K−1 at 30 to 1,000° C., and a phase transition temperature, from a rhombic system to a rhombohedral system, of about −20° C. or less.
摘要翻译:复合氧化物陶瓷烧结体具有钙钛矿型晶体结构,由通式(La1-xSrx)a(Cr1-y-zAlyCoz)bO3表示,其中x + z> 0.06; z> = 0.02; x + y + 3z <= 0.25; 2x + 3y + 5z> = 0.40; x + y> = 0.12; 而1.00 <= b / a <= 1.04。 烧结体在室温和室温下的相对密度为约94%以上,弯曲强度为约15kgf / mm 2以上,在烧结体在含有氢化氢的加湿氢气氛中处理24小时后, 在1000℃下的氧分压为10-18atm。在氧分压为10的加湿氢气气氛中处理24小时后,烧结体的室温下的晶格体积膨胀系数进一步为约0.3%以下 -18atm,在30℃〜1000℃下的平均热膨胀系数为9.8〜11.0×10 -6 K -1,从菱形体到菱面体系的相变温度 ,约-20℃或更低。
摘要:
A solid oxide fuel cell which has a fuel electrode and an air electrode respectively on a first surface and on a second surface of a solid electrolyte. The interface between the solid electrolyte and the fuel electrode, and the interface between the solid electrolyte and the air electrode are roughened. An exemplary way of roughening the interfaces is as follows: a green sheet of solid electrolyte, a green sheet of fuel electrode and a green sheet of air electrode are laminated with the green sheet of electrolyte in the middle; sandpaper is put on each of the green sheet of fuel electrode and the green sheet of air electrode with a plastic film in-between in such a manner that the rough surfaces of the sandpaper face the green sheets of electrode; the laminate of green sheets is press-fixed, whereby the rough surfaces of the sandpaper roughen the interfaces; and the sandpaper and the plastic films are removed.
摘要:
A memberane sensitive to anions is obtained by forming into a membrane either a composition comprising an onium salt compound such as trioctylmethylammonium chloride or tetraoctylammonium bromide, and an aromatic boric diester compound such as (p-alkyloxy)phenyl borate, or a composition which comprises these two ingredients and a membrane-forming polymer such as polyvinyl chloride or polystyrene, and may further contain a fat-soluble anion salt such as tetraphenyl borate. This membrane can yield an ion-selective electrode which permits hydrogencarbonate ions contained in body fluids to be rapidly determined with high sensitivity and high selectivity and which has a long life.
摘要:
A solid-electrolyte fuel cell has a three-layered film in which an air electrode is arranged on one surface of a solid-electrolyte film and a fuel electrode is arranged on the other surface, a support layer is bonded to an electrode of the three-layered film, and a collecting layer is bonded with another surface of the support layer and the fuel electrode and the collecting layer, or the air electrode and the collecting layer are electrically connected to each other through holes formed in the thickness direction of the main surface of the support layer.
摘要:
An object of the present invention is to provide a method for analyzing hemoglobins which can accurately separate hemoglobins in a short time by liquid chromatography.The present invention provides a method for analyzing hemoglobins by liquid chromatography which includes pre-treating a sample with an oxidant and a binder for trivalent heme iron.
摘要:
The present invention relates to a method for producing inorganic oxide particles, comprising at least the following steps of: coagulating a dispersion obtained by carrying out the hydrolysis reaction and the polycodensation reaction of a metal alkoxide in the presence of a basic catalyst; filtering the dispersion to obtain particles; and drying the particles, wherein the step of coagulating the dispersion is carried out by adding a coagulant comprising at least one compound selected from the group consisting of carbon dioxide, ammonium carbonate, ammonium hydrogen carbonate and ammonium carbamate to the dispersion. The inorganic oxide particles obtained by the method of the present invention have high purity and are excellent in flowability.
摘要:
Disclosed is a composition for the separation of a serum or plasma, which comprises a cyclopentadiene oligomer, can be used for separating a serum or plasma by utilizing the difference in specific gravity among blood components, and enables to provide a serum or plasma having no oily component floating therein after centrifugal separation. The composition comprises a trimellitic acid ester and/or a pyromellitate ester and a cyclopentadiene oligomer. Alternatively, the composition comprises an aromatic esterified compound and a cyclopentadiene oligomer as the main ingredients and additionally comprises an inorganic micropowder and an organic gelling agent as thixotropy-imparting agents, wherein the organic gelling agent is contained in an amount of less than 0.06 parts by weight relative to 100 parts by weight of the cyclopentadiene oligomer.