摘要:
The catalytic activity of a chromium oxide-based catalyst used in the production of chlorine by oxidation of hydrogen chloride gas with an oxygen-containing gas is regenerated by impregnating it with an aqueous solution of chromic acid anhydride or of a chromium salt and then calcining the catalyst at a temperature not higher than 800.degree. C.
摘要:
Disclosed herein is a method for the stabilizing treatment of a catalyst comprising washing the catalyst with hot washing water following the preparation of the catalyst, the catalyst being composed principally of chromium oxide and used in the production of chlorine by the oxidation of hydrogen chloride with an oxygen-containing gas, thereby improving its catalytic activity and prolonging its life.
摘要:
A thermally conductive silicone grease composition comprising: (A) an organopolysiloxane having at least two alkenyl groups in one molecule and having a kinetic viscosity of 5,000 to 100,000 mm2/s at 25° C.; (B) a hydrolyzable methylpolysiloxane having a trifunctional termination at one end and represented by the following general formula (2): wherein R2 represents an alkyl group having 1 to 6 carbon atoms and b is an integer of 5 to 100; (C) a thermally conductive filler having a thermal conductivity of at least 10 W/m·° C.; (D) an organohydrogenpolysiloxane containing from 2 to 5 hydrogen atoms in one molecule directly bound to silicon atoms (Si—H groups); (E) a bonding aid having a triazine ring and at least one alkenyl group in one molecule; and (F) a catalyst selected from the group consisting of platinum and platinum compounds.
摘要:
A navigation apparatus includes a memory that stores registered routes, wherein each registered route includes a previously traveled route, a corresponding starting point, and a corresponding destination point. The navigation apparatus includes a controller that searches for a route from a specified starting point to a specified destination point, compares the searched route with the registered routes, and utilizes, if a corresponding starting point is substantially identical to the specified starting point or a corresponding destination point is substantially identical to the specified destination point, a portion of a registered route including the substantially identical starting point or the substantially identical destination point as a navigation route.
摘要:
Provided is a heat-conductive silicone composition, including: (A) 100 parts by volume of an organopolysiloxane having a specific structure, (B) 0.1 to 50 parts by volume of an organosilicon compound that functions as a wetter and contains a triorganooxysilyl group bonded to one terminal via an alkylene group that may be branched, (C) 100 to 2,500 parts by volume of a heat-conductive filler, and (D) an effective quantity of a curing agent. Also provided is a heat-conductive silicone cured product obtained by curing this composition. The heat-conductive silicone composition, even when filled with a large quantity of a heat-conductive filler in order to provide superior thermal conductivity, exhibits a minimal increase in viscosity or plasticity, and retains favorable handling properties and moldability. The heat-conductive silicone cured product exhibits excellent flexibility even when filled with a large quantity of a heat-conductive filler. Heat generated by a heat-generating electronic component can be dissipated into a heat-radiating component by sandwiching the cured product between the heat-generating electronic component and the heat-radiating component.
摘要:
Provided is a heat conductive silicone grease composition including (A) 100 parts by mass of an organopolysiloxane containing 2 or more alkenyl groups bonded to silicon atoms within each molecule, (B) an organohydrogenpolysiloxane containing 2 or more hydrogen atoms bonded to silicon atoms within each molecule, in sufficient quantity to provide from 0.1 to 5.0 hydrogen atoms bonded to silicon atoms within the component (B) for each alkenyl group within the component (A), (C) 100 to 2,200 parts by mass of a heat conductive filler, (D) an effective quantity of a platinum-based catalyst, and (E) an effective quantity of an addition reaction retarder, in which the component (C) includes more than 90% by mass and no more than 100% by mass of an indium powder with an average particle size of 0.1 to 100 μm. Also provided is a heat conductive silicone cured product obtained by curing the above composition by heating at a temperature equal to, or greater than, the melting point of the indium powder. Further provided is an electronic device including an electronic component, a heat radiating member, and a heat conductive member including the above cured product disposed between the electronic component and the heat radiating member. Still further provided is a method of curing the above composition. Even further provided is a method of forming a heat conductive member between an electronic component and a heat radiating member. The above heat conductive silicone grease composition generates a suitably thin cured product with excellent thermal conductivity that prevents problems such as the contamination of components other than the coated component, and the leakage of oily materials from the product if used over extended periods.
摘要:
A sampling system includes a first sampler which periodically samples an input signal at a fixed sampling period T to output a sequence of samples. A first lowpass filter outputs a sequence of −T/4 phase shifted samples from the sequence of samples. A second lowpass filter outputs a sequence of +T/4 phase shifted samples from the sequence of samples. A second sampler outputs a sequence of secondary samples by alternately taking the −T/4 phase shifted samples supplied by the first lowpass filter and the +T/4 phase shifted samples supplied by the second lowpass filter at,a sampling period that is half the sampling period T, the second sampler doubling the number of the samples output by the first sampler. An interpolation circuit outputs at the sampling period T a sequence of output samples by executing an interpolation of the sequence of secondary samples output by the second sampler, the sequence of output samples having a timing phase synchronized to a given arbitrary clock signal.
摘要:
A sampling system includes a first sampler which periodically samples an input signal at a fixed sampling period T to output a sequence of samples. A first lowpass filter outputs a sequence of −T/4 phase shifted samples from the sequence of samples. A second lowpass filter outputs a sequence of +T/4 phase shifted samples from the sequence of samples. A second sampler outputs a sequence of secondary samples by alternately taking the −T/4 phase shifted samples supplied by the first lowpass filter and the +T/4 phase shifted samples supplied by the second lowpass filter at, a sampling period that is half the sampling period T, the second sampler doubling the number of the samples output by the first sampler. An interpolation circuit outputs at the sampling period T a sequence of output samples by executing an interpolation of the sequence of secondary samples output by the second sampler, the sequence of output samples having a timing phase synchronized to a given arbitrary clock signal.
摘要翻译:采样系统包括第一采样器,其在固定采样周期T周期性地采样输入信号,以输出采样序列。 第一低通滤波器从样本序列输出-T / 4个相移样本序列。 第二个低通滤波器从样本序列输出一个+ T / 4个相移采样序列。 第二采样器通过交替地采取由第一低通滤波器提供的-T / 4相移采样和由第二低通滤波器提供的+ T / 4相移样本,在一半的采样周期输出次序样本序列 采样周期T,第二采样器将由第一采样器输出的采样数量加倍。 内插电路通过执行由第二取样器输出的次级样本序列的插值,采样周期T输出输出采样序列,输出采样序列具有与给定的任意时钟信号同步的定时相位。
摘要:
Disclosed is a data storage device capable of storing plural bits of data using one storage circuit which can hold two signal levels. The data storage device storing the plural bits of data comprises a clock generating section for generating a reference clock signal having predetermined reference cycles and at least one divided clock signal having a cycle which is (½)n (n: natural number) times the reference cycle; decoding sections for selecting any one of periods, based on contents of data inputted thereto, among a plurality of periods at which a signal level of the divided clock signal is constant at one of the reference cycles; a storage section for starting to generate cyclic pulses having the same cycle as the reference cycle at a predetermined timing as a trigger timing, the predetermined timing being within the selected period by the decoding sections; and an output section for specifying output data based on a signal level of the reference clock signal at the same phase timing as the trigger timing in terms of a cycle of the pulses and a signal level of the divided clock signal in the phase timing.
摘要:
A heat-reducing silicone grease composition comprising a mixture of (A) 50-95 weight % of aluminum nitride powder having an average particle size of 0.5-10 &mgr;m and containing no particles 100 &mgr;m or greater in size, (B) 5-50 weight % of liquid silicone having a viscosity of 50-500,000 cs at 25° C. and (C) 0-30 weight % of at least one powder selected from the group consisting of zinc oxide, alumina, boron nitride and silicon carbide powders; and a semiconductor device to which the foregoing silicone grease composition is applied.