CALORIMETRIC CELL FOR DETERMINING THE HEAT OF REACTION OF REACTIVE ENERGETIC FOIL WITH THE EFFECT OF SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS Russian patent published in 2022 - IPC G01N25/22 G01N25/38 G01K17/00 

FIELD: measuring.

SUBSTANCE: invention relates to the field of measuring the amount of heat — calorimetry of combustible materials, to apparatuses for determining the heat of reaction released from the combustion of materials, in particular, the heat of reaction of reactive energetic foil with the effect of self-propagating high-temperature synthesis. Proposed is a calorimetric cell consisting of the following main parts: a cup made of a material with low heat conductivity (fluoropolymer, polyethylene, glass, etc.) with an isothermal shell; a transparent plexiglass cover installed on a magnetic stirrer; a heater in the form of a thin nichrome spiral connected to a stabilised power source; a temperature sensor placed in the cell; a pedestal for placing an SHS foil sample in the cell; and spring-loaded electrodes secured on the cell cover, allowing for short-term electrical contact with the surface of the SHS foil sample placed in the water on the pedestal whereon the impeller of the magnetic stirrer is also placed. The spring-loaded electrodes in the initial state do not come in contact with the water surface and the surface of the SHS foil. This is the non-working state of the cell. In the working state, the spring-loaded electrodes connected to a voltage and current source come in contact with the surface of the SHS foil. A thin wire grid is also placed on the line of the pedestal so as to prevent the reacted SHS foil from entering the impeller of the magnetic stirrer and interfering with the stirring of water. The cell cover made of a transparent material (plexiglass, regular glass, polyethylene, etc.) allows for the course of SHS reaction to be visually monitored.

EFFECT: creation of a simple design of a calorimetric cell for measuring the heat of reaction of SHS foil, allowing for highly productive measurements without using a calorimetric "bomb" and oxygen to initiate the reaction.

3 cl, 2 dwg