SU195163A1 - METHOD FOR DETERMINING TRUE HEAT CAPACITY MATERIALS - Google Patents
METHOD FOR DETERMINING TRUE HEAT CAPACITY MATERIALSInfo
- Publication number
- SU195163A1 SU195163A1 SU888026A SU888026A SU195163A1 SU 195163 A1 SU195163 A1 SU 195163A1 SU 888026 A SU888026 A SU 888026A SU 888026 A SU888026 A SU 888026A SU 195163 A1 SU195163 A1 SU 195163A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- heat capacity
- true heat
- capacity materials
- determining true
- materials
- Prior art date
Links
- 239000000463 material Substances 0.000 title description 8
- 238000001816 cooling Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 238000010292 electrical insulation Methods 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002068 Fluorinated ethylene propylene Polymers 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
Description
Извеетен способ определени истинной теплоемкости электропроводных материалов, предварительно разогретых пропускаемым по ним током, затем свободно охлаждаемых в вакуум ной камере. При этом стро т кривые нагрева и охлаждени , по иим .наход т тангенсы углов наклона этих кривых относительно оси абсцисс, с помош,ыо фотоприставки ФЭП определ ют температуру образца и по полученным данным рассчитывают теплоемкость материала .The method of determining the true heat capacity of electrically conductive materials, preheated by the current flowing through them, then freely cooled in a vacuum chamber, is well known. In this case, the heating and cooling curves are plotted, and the tangents of these angles of these curves are found relative to the abscissa axis, and the temperature of the sample is determined from the FEP photo attachment and the heat capacity of the material is calculated from the data obtained.
Этот способ не применим дл электроизол ционных материалов.This method is not applicable to electrically insulating materials.
Предложенный способ отличаетс от известного тем, что на этапе охлаждени измер ют, как функцню време 1и, радиационный тепловой поток, рассеиваемый с поверхности образца , и по пол)чепным данным рассчитывают радиационную температуру и истинную теплоемкость материала.The proposed method differs from the well-known fact that at the cooling stage, the radiation heat flux dissipated from the sample surface is measured as a function of time, and the radiation temperature and the true heat capacity of the material are calculated from the field data.
Образец в виде стержн помещают в вакуумную печь, разогревают до заданной температуры , затем быстро экранируют от нагревател и охлаждают. Этап охлаждени - рабочий этан эксперимента. На этом этане с номощью малоинерционного радиационного тепломера определ ют, как функцию времени, радиациоиныи тепловой поток, рассеиваемый с поверхиости образца, и его радиациоиную температуру. По нолучеиш м данным вычисл ют истинную теплоемкость материала.The sample in the form of a rod is placed in a vacuum oven, heated to a predetermined temperature, then quickly shielded from the heater and cooled. The cooling stage is the work ethane of the experiment. On this ethane, with the aid of a low-inertia radiative heat meter, it is determined, as a function of time, the radiation and the heat flux dissipated from the surface of the sample, and its radiation temperature. According to the best data, the actual heat capacity of the material is calculated.
Описываемый способ позвол ет определить истинную теплоемкость электроизол ционных материалов в широком диапазоне температур (900-2000 С) н унростнть процесс исследовании .The described method allows to determine the true heat capacity of electrical insulation materials in a wide temperature range (900-2000 ° C) and an uncomplicated research process.
Предмет изо б р е т е н л Subject of art.
Способ определени истииной теплоемкости материалов, заключающийс в том, что иснытуемый образец предварительно разогревают , а затем свободно ох.чаждают в вакуумированной среде с носто нной, например, комнатной температурой, отличающийс тем, что, с целью обеспечени измеренн истинной теплоемкостн как электропроводных, так и электроизол ционных материалов и упрощени процесса исследовани , на этапе охлаждени измер ют, как функцию времени, радиационный тепловой поток, рассеиваемый с поверхиости образца, и по полученным данным рассчитывают радиационную температуру и истинную теплоемкость материала.The method of determining the true heat capacity of materials, is that the sample to be tested is preheated and then freely cooled in an evacuated medium with, for example, room temperature, characterized in that, in order to provide measured heat capacity, both electrically conductive and electrical insulation materials and simplify the research process; in the cooling stage, the radiation heat flux dissipated from the sample surface is measured as a function of time and, according to the data obtained, calculate the radiation temperature and the true heat capacity of the material.
Publications (1)
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SU195163A1 true SU195163A1 (en) |
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