摘要:
A solid solution particle of oxides contains a solid solution of oxides in which one oxide is dissolved into the other oxide, and in which the degree of dissolution of one oxide into the other oxide is not less 50%, and in which an average diameter of crystallite is not more than 100 nm. The solid solution particle of oxides has small average diameter of a crystallite and large specific surface area, and it improves capacities such as an oxygen storage ability due to high degree of dissolution. A catalyst for purifying exhaust gases has excellent purifying performance by employing the solid solution comprising ceria and zirconia which has large OSC and high oxygen adsorption and discharge speed.
摘要:
Impurities are removed from chaff by acid treatment, and the chaff is heated for carbonization. Silicon is reduced from the carbonized chaff, and nitrided to form silicon nitride.
摘要:
An ordinary-temperature purifying catalyst includes an oxide having an oxygen defect introduced by a reduction treatment, and a noble metal loaded on the oxide. For example, the oxide can be at least one oxide selected from the group consisting of cerium oxides and zirconium oxides, at least a part of which has an oxygen defect. The catalyst can purify an environmental loading material, such as carbon monoxide, a nitrogen oxide, ethylene, formaldehyde, trimethylamine, methyl mercaptan and acetaldehyde, in air at an ordinary temperature. A method for how to use the catalyst is also disclosed.
摘要:
The invention features an MgAl2O4 spinel powder having a specific surface area of 40 m2/g or more and an average diameter of from 3 to 20 &mgr;m and having uniform pores, and a slurry containing this spinel powder. The spinel powder is produced by milling (1) an MgAl2O4 spinel powder obtained by synthesizing by the coprecipitation method with the use of hydroxide materials wherein the ratio of the average diameter of aluminum hydroxide “D1” to the average diameter of magnesium hydroxide “D2” satisfies the requirement 1.85≦(D1/D2) or 0.5>(D1/D2) and calcining, (2) an MgAl2O4 spinel powder obtained by drying a mixture solution containing water-soluble organic substance having a boiling point of 120° C. or above, converting the dried substance into a complex oxide by heating, or (3) a powder comprising as the main component an MgAl2O4 spinel powder which is obtained by mechanically mixing and milling a mixture of hydroxides for producing a spinel powder to convert into a complex hydroxide, and then heating a mixture composition containing the obtained complex hydroxide with an unconverted hydroxide to thereby convert into a complex oxide.
摘要翻译:本发明的特征在于具有40m 2 / g以上的比表面积和3〜20μm的平均粒径并具有均匀孔的MgAl 2 O 4尖晶石粉末和含有该尖晶石粉末的浆料。 尖晶石粉末通过研磨(1)通过共沉淀法合成得到的MgAl 2 O 4尖晶石粉末,使用氢氧化物材料制成,其中氢氧化铝“D1”的平均直径与氢氧化镁平均直径“D2”的比率 满足要求1.85 <=(D1 / D2)或0.5>(D1 / D2)并煅烧,(2)通过干燥含有沸点为120℃的水溶性有机物质的混合溶液获得的MgAl 2 O 4尖晶石粉末 或以上,通过加热将干燥物质转化为复合氧化物,或者(3)以MgAl 2 O 4尖晶石粉为主要成分的粉末,该粉末是通过机械混合和研磨氢氧化物混合物制造尖晶石粉而得到的, 复合氢氧化物,然后用未转化的氢氧化物加热含有所得复合氢氧化物的混合物组合物,从而转化为复合氧化物。
摘要:
A valve includes a valve housing defining therein a fluid passage composed of a first passage and a second passage, a first valve member configured to open and close the fluid passage, a first biasing member pressing the first valve member in a first valve-closing direction along a flow direction from the first passage to the second passage, a second valve member configured to open and close the fluid passage, a second biasing member pressing the second valve member in a second valve-closing direction along the flow direction from the first passage to the second passage, an electromagnetic driving member having an pressing member opening the first valve member and the second valve member in stages, a third valve member configured to open and close the fluid passage, and a third biasing member pressing the third valve member in a third valve-closing direction along a flow direction from the second passage to the first passage. The third valve member is configured to open the fluid passage when internal pressure of the first passage is higher than internal pressure of the second passage by a predetermined value.
摘要:
A shaped heat storage material has a shaped body composed of a binder and heat storage capsules containing a heat storage material therein. And, the shaped body has at least one of a projection, a depressed portion and a hollow structure defining a hollow space therein.
摘要:
A vehicle communication system has a receiving unit on a vehicle side for inputting a demodulated analog signal to determination units based on a received radio signal from a key unit. Then, one of the two determination units outputs a high-check signal that takes a high value when the analog signal is greater than a high threshold and the other determination unit outputs a low-check signal that takes a low value when the analog signal is smaller than a low threshold. Then, a sync. signal generator successively defines a determination period based on the high and low check signals. Then, a binary level of the analog signal is determined by a level determination unit based on the check signals, along with an estimation and a correction of an indefinite signal when the signal level cannot be determined based on a coding rule and the determination by the determination units.
摘要:
An external inserting meatus of user is closed with an insert earphone device in use so that it is hard that external sound penetrates into the external inserting meatus; not only an internal sound propagation path but also an external sound propagation path are formed in an inserting body of the earphone device, and an active diaphragm is provided in the inserting body so as to make the external sound propagation path closed therewith and block the external auditory meatus from the external sound; the active diaphragm is formed from electroactive polymer layer sandwiched between electrodes, and the active diaphragm is deformed in the presence of voltage so as permit the user easily to control it.
摘要:
A dust filter of an evaporated fuel treatment device is taught that preferably include a filtration member for filtering air introduced to an atmosphere introduction path, and a casing receiving the filtration member therein. The dust filter being disposed on the atmosphere introduction path of the evaporated fuel treatment device. The filtration member has an arcuate shape in cross section, and wherein the filtration member is arranged and structured such that air flows in a radial direction thereof, so as to be filtered.
摘要:
A vehicle communication system has a receiving unit on a vehicle side for inputting a demodulated analog signal to determination units based on a received radio signal from a key unit. Then, one of the two determination units outputs a high-check signal that takes a high value when the analog signal is greater than a high threshold and the other determination unit outputs a low-check signal that takes a low value when the analog signal is smaller than a low threshold. Then, a sync. signal generator successively defines a determination period based on the high and low check signals. Then, a binary level of the analog signal is determined by a level determination unit based on the check signals, along with an estimation and a correction of an indefinite signal when the signal level cannot be determined based on a coding rule and the determination by the determination units.