摘要:
An expanded graphite sheet with improved tensile strength is provided. By using an expanded graphite sheet with improved tensile strength as a lining for a carbonaceous crucible, a method of protecting a carbonaceous crucible is provided that reduces work hours remarkably, makes it possible to cover the inner surface of the crucible without breaking the sheet or producing gaps, and is suitable for increasing the size of the crucible, and a single-crystal pulling apparatus is also provided. An expanded graphite sheet (10) is characterized in that a reinforcing material (12) comprising carbon fibers is formed in a laminate form on at least one side of a substrate (11) made of an expanded graphite material. Another feature is interposing the expanded graphite sheet (10) between a quartz crucible and a carbonaceous crucible in which the quartz crucible is placed, to use the expanded graphite sheet as a lining for covering an inner surface of the carbonaceous crucible.
摘要:
There is obtained a carbon material for lithium-ion secondary battery negative electrode, a low-crystalline carbon impregnated carbon material for lithium-ion secondary battery negative electrode, a negative electrode plate, and a lithium-ion secondary battery, each of which realizes a first charge/discharge cycle with less gas generation and provides a rapid charge/discharge. The carbon material is obtained by: blending and kneading a carbonaceous aggregate with a binder to form a composition; press molding the composition into an article; carbonizing the press molded article; graphitizing the article to obtain an artificial graphite block; milling the block; and carrying out particle size control. The carbon material has characteristics of: (1) R-value=(I1360/I1580)≧0.2, where R-value is defined by the ratio of D band to G band in Raman spectrum using Nd:YAG laser light of 532 nm wavelength; and (2) d(002)≧0.336 nm, and Lc(002)≦50 nm, where d(002) and Lc(002) are crystallographic parameters calculated by Gakushin-method. The carbon material is used for the negative electrode plate of a lithium-ion secondary battery, and used in the lithium-ion secondary battery having therein the negative electrode plate.
摘要:
A carbon electrode for producing gaseous nitrogen trifluoride comprising a dense texture with an average pore size of 0.5 μm or less is provided. The carbon electrode contains a carbonaceous material, and 3 to 10 wt % of at least one selected from magnesium fluoride and aluminum fluoride which have a melting point not lower than the baking temperature of the carbonaceous material.
摘要:
A fluorine gas generator for generating fluorine gas by electrolysis of an electrolytic bath comprising a hydrogen fluoride-containing mixed molten salt in which generator the position of the electrolytic bath liquid surface in the electrolytic cell can be safely controlled even during suspension of electrolysis therein is provided. The generator comprises an anode chamber and a cathode chamber separated from each other by a partition wall and is provided with electrolytic bath liquid level controlling means for controlling the electrolytic bath liquid level in at least one of the anode chamber and cathode chamber during suspension of fluorine gas generation.
摘要:
The invention provides a method and apparatus for current control in gas generators capable of generating a fluorine or fluoride gas by and in which the electrolysis can be maintained in an optimum condition, stable operation is possible and no manpower is demanded. According to the method of current control in gas generators for generating a fluorine or fluoride gas by electrolysis of an electrolytic bath 5 comprising a hydrogen fluoride-containing mixed molten salt using a carbon electrode as the anode 4a, the range of voltage fluctuation between the cathode 4b and anode 4a as occurring when a certain current is applied to the gas generator is measured, and current application is continued while varying the current amount to be applied according to the voltage fluctuation range.
摘要:
The present invention provides an electrolytic anode for use in electrolytically synthesizing a fluorine-containing substance by using an electrolytic bath containing a fluoride ion including: an electroconductive substrate having a sure including an electroconductive carbonaceous material; and an electroconductive carbonaceous film having a diamond structure, the electroconductive carbonaceous film coating a part of the electroconductive carbonaceous substrate, and a method for electrolytically synthesizing a fluorine-containing substance using the electrolytic anode.
摘要:
An F2 gas generating apparatus for generating a high purity F2 gas by subjecting an electrolytic bath made of KF.2HF to electrolysis is characterized by comprising a preparing system for preparing KF.2HF from KF or KF.HF, an HF supplying system for supplying HF into the electrolytic bath and the preparing system, and an F2 gas generating system for generating the F2 gas by subjecting KF.2HF prepared by the preparing system to electrolysis.
摘要:
Long carbonaceous moldings and long carbonaceous products as well as methods of production thereof by which carbonaceous products can be obtained without allowing twisting or curving and with less frequent occurrence of cracking etc. even when subjecting the heat treatment and which are excellent in mass productivity are provided. The long carbonaceous moldings have an aspect ratio of 3 to 20 and showing fluctuations in the density thereof of not more than 0.05 Mg/m3 throughout the whole moldings.
摘要翻译:提供长碳质成型体和长碳质物,以及即使在经受热处理并且具有优异的批量生产率的情况下,也可以提供可以获得碳质产物而不允许扭曲或弯曲并且发生较少裂纹的生产方法 。 该长碳质成型体的纵横比为3〜20,在整个模制品中,其密度波动不大于0.05Mg / m 3。
摘要:
A carbon material for producing endohedral metallofullerenes in a high yield is made of a mixture of a metal or metal compound with a carbonaceous material and is used in producing a endohedral metallofullerenes, wherein said carbon material contains a metal carbide and a bulk density of said carbon material is set to 1.80 g/cm3 or less.
摘要翻译:用于以高产率生产内嵌金属富勒烯的碳材料由金属或金属化合物与碳质材料的混合物制成,并用于生产内嵌金属富勒烯,其中所述碳材料包含金属碳化物和所述碳的堆积密度 材料设定为1.80g / cm 3以下。
摘要:
A fluorine gas generator is provided with which the gases used and/or generated, in case of leakage thereof, can be prevented from mixing together as far as possible and, even in case of gas leakage into the outside of the generator system, the leakage gas can be treated safely and in which the maintenance, exchange and other operations are easy to carry out. The generator comprises a box-shaped body containing an electrolyzer for fluorine gas generation, and the box-shaped body is divided into two or more compartments, including a compartment containing the electrolyzer.