摘要:
When N-fluoropyridinium salt of the following formula is prepared by reacting a pyridine compound with a Brønsted acid and fluorine, an excess amount of the pyridine compound relative to the amount of the Brønsted acid being used, a high yield results.
摘要:
Disclosed are a solid oxide fuel cell and a method of manufacturing the same. An electrolyte layer (3) of the solid oxide fuel cell unit (5) is formed by spray coating the layer on a substrate (1) having a coefficient of thermal expansion which is substantially equal to that of the electrolyte layer (3), and the formed layer is then subjected to heat treatment.
摘要:
An oven for baking a powdered coating material to an object has an inlet air-shield chamber (2) connected to the inlet side of a horizontal heating chamber (1). The inlet air-shield chamber (2) is provided therein with a radiation heat source (10) which heats the object and the layer of coating powder to a temperature substantially equal to the baking temperature before the object enters the horizontal heating chamber. (1).
摘要:
Initial setting, initial adhesion and long-term stability of mortar and concrete can be improved by use of a cement accelerating agent comprising (1) calcined alunite, a carbonate and lime, (2) calcined alunite, a carbonate and an aluminate, or (3) calcined alunite, a carbonate, an aluminate and lime.
摘要:
A demolition agent which acts by means of expansive stress generated upon hydration is prepared by calcining limestone at 1300 to 1600°C to produce a hard-burned quick lime whose crystal size is 10 to 100 micron, pulverizing the resulting hard-burned quick lime to 1500 to 5000 cm 2 /g (Blaine), mixing 5 to 70 parts by weight of a hydraulic material to 30 to 95 parts by weight of the hard-burned quick lime and furthermore adding 0.1 to 5 parts by weight of a modifying agent to 100 parts by weight of the mixture of the powdery hard-burned quick lime and the hydraulic material. The demolition agent is used as an aqueous slurry which is filled into holes of a brittle material to demolish the brittle material by means of expansive stress generated upon hydration.
摘要:
A vortex type air classifier comprises a rotor provided with a plurality of vortex controlling blades, and guide vanes provided about the outer peripheries of the blades with a classification chamber therebetween. A setting pitch P is found by the following expression in relation to separated particle sizes Dp (th), so that powder materials are accurately classified at a desired point of classification: P ≦ 1.04 x Dp(th) 0.365 .
摘要:
A plasma flame (23) flowing to a substrate (25) around a beam of melt droplets (21) is trimmed by spraying a refrigerant on the plasma flame in the direction which allows the refrigerant to contact with the beam of the melt droplets (21).
摘要:
Commercially available fly ash is prepared and charged in a vessel. A halogen gas is supplied to the vessel and is brought into contact with the fly ash in the vessel.
摘要:
The invention refers to a method of grinding the surface (1a) of a diamond (1), a respective apparatus and a diamond product. The side surface (4a) of a laser beam (4) is brought into contact with the diamond (1), and the side surface (4a) of the laser beam (4) is relatively moved along the surface (1a) of the diamond (1) while giving thermal energy of the laser beam (4) to the surface (1a) of the diamond (1). The diamond (1) thus ground can be used in a cutting tool and a heat sink.