SU1288569A1 - Device for investigating material impregnation process - Google Patents

Abstract

The invention relates to the technology of materials and can be used to study the process of impregnation of carbon materials to change their resistivity. The aim of the invention is to improve the accuracy and reduce the complexity of the measurements. The device comprises an impregnation vessel in which a sample of the material is placed. Contacts are pressed to the sample, which are in constant contact with it due to the fact that the free ends of the arms are affected by the non-working ends of the contacts, on the other ends of which the loads are placed. Levers mounted on the crossbars. 2 Il. WITH ISD 00 00 SP Au; o

Description

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This invention relates to material technology. in particular, obtained using multiple impregnations and roasting, for example, devices for studying the process of impregnating carbon materials to change their electrical resistivity.

The purpose of the invention is to improve the accuracy and reduce the complexity of the measurements, as well as expanding the functionality,

The figure shows the proposed device, the general view (for simplicity and conciseness of the image, the left part of the device is not shown; the right part is completely symmetrical) i in Fig. 2 the node of the direct contact to the sample under study.

A device for studying the process of impregnating carbon materials by measuring the resistivity of the samples in the impregnation process contains an electrically insulating base I with racks 2 placed on it, on which grounded perforated discs 4 are placed in the holes, which are guides Perforated discs are fitted with pressure contacts for current supply and potential removal, made in the form of electrically insulating cylinders 5 with conductive tips 6 impregnated on Sample 7, The specified sample is placed in clamps 8 The device also contains a heating unit for the workpiece, made of heater 9 and power supply 10 (with corresponding regulator, not shown), Strong non-working ends of the contacts are carried out by levers 1; , the ends with the non-working ends of the contacts and placed pivotally on crossbars I2, a stand 13, also fixed on the base 1, are installed on opposite ends of the hooks P Cargo 14, liMnper nat 15 is placed in the propulsion vessel 6, and the entire device is sealed to volume 17, for which, for example, a cupboard can be used. The device also contains an impregnation supply unit 18, an atmosphere control unit 19, which can

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consist, for example, of a vacuum pump and a system of valves (for air-vacuum impregnation) J recorder,

20 voltages (constant voltage source 21 and current recorder 22,

The study of the impregnation process of carbon materials works as follows.

The sample 7 intended for impregnation (after firing) is mounted with the hinges 3 folded in the latches 8, then the disks 4 are turned with guides until the current-conducting tips 6 contact the ends

 sample 7 and fix the hinges 3 in this position (special screws, not shown). Folded and fixed Wave levers 1I are released so that their ends are npi-shima contacts to sample 7, then crushed or poured are poured. Liquid pitch 15 (impregnate), close the cabinet door, turn on the power from source 10 to electric heater 9 and from the source

21 on sample 7, simultaneously turning on the recorders 20 and 22. After reaching the temperature, the vacuum pump of the block 19 is turned on, the specified time is pumped out to the required vacuum.

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m and serves the air. After exposure, the pitch 16 is poured and the device is cooled, continuing for all these operations the recording of the current and voltage on the sample, from which the specific electrical resistance is determined from known sample sizes.

Example, The invention is tested by impregnating a workpiece (sample) with a diameter of 80 mm and a length of 120 mm from annealed; - semi-finished product of medium-grained graphite. The impregnation is carried out at a residual pressure of 0.05 atm. The exposure is under vacuum for 35 minutes, the residence time is under atmospheric pressure after air supply for 2 hours. The change in the resistivity of the workpieces takes place with an AES up to 250-io ohm, m,

Claims (1)

Invention Formula A device for examining the process of impregnating materials by measuring the resistivity of a sample during the impregnation process, containing a power source, a measuring device, an impregnation vessel, which contains clamping contacts installed in guides and units for pressing the contacts to the sample under investigation, characterized in that, in order to increase accuracy and reduce the labor intensity of the measurements, the nodes are made in the form of racks with arms on different levels, on bars, to rotate, levers fitted at one end with weights, made with the possibility of contacting the free ends with the non-working ends of the contacts. / 2h / 1 fr FIG. 2 Compiled by V.Ekaev Editor O. Bugir Tehred L.Oleinik Order 7800/41 Circulation 776 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul, Proektna, 4 Proofreader H, King