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Specific heat capacity

The specific heat capacity indicates the ability of a substance to store heat. This substance size corresponds to the amount of heat needed to heat a certain amount of a substance by one Kelvin. It is characteristic of each substance and can be used to identify materials. The unit of measure of specific heat capacity is kilojoules per kilogram times Kelvin [kJ/(kg * K)].

In principle, a distinction is made between the specific heat capacity for the temperature change under constant pressure (cp) and under constant volume (cv). The heat supply under constant pressure simultaneously causes an increase in volume, for which a part of the energy is used up. The distinction is of importance only in the consideration of gases and vapors.

The specific heat capacity of solids is used primarily in the construction industry for the assessment of the behavior of building material. In summer, fabrics with high heat capacity keep the rooms cool for a long time. In winter, they keep the heat in the buildings longer. The heat storage capacity is also the basis for the selection of materials in furnace and heating construction.

The specific heat capacity was initially measured by immersing a heated sample of material in water. After the temperature compensation, the specific heat of the sample was calculated on the basis of the temperature difference between the beginning and the end of the experiment. Since in the formula, the heat capacity of the experimental arrangement had to be considered, the process was somewhat cumbersome.

Linseis’ state-of-the-art meters are based on Differential Scanning Calorimetry (DSC) and Differential Thermal Analysis (DTA). These methods provide highly accurate measurement results in a short time. The measurements can be carried out in wide temperature ranges. As a result, it is additionally possible to determine the temperature dependence of the specific heat capacity.

Applications measuring Cp

Application: Specific Heat of Polyethylene

Linseis application Specific Heat of Polyethylene

The Picture shows a Polyethylene standard material in a Heat-Cool-Heat Experiment. There are differents in the first and the second heating curve due to change of crystallinity of the sample.

Application: Graphite polycrystalline

Linseis application Graphite polycrystalline

Graphite is an excellent material for checking the performance of a Laser/Xenon Flash Thermal Analyzer. The analyzed material shows a maximum thermal diffusivity around room temperature. The specific heat of the material which can be analyzed by comparative method or by using a DSC / High Temperature DSC shows a significant increase at higher temperatures.

Our measuring instruments for the measurement of Cp

DTA PT 1600

DTA-PT1600
  • High temperature DTA
  • Modular instrument design (sample robot, gas dosing systems, muliple furnaces on a turntable, etc.)
  • Qualitative analysis of endothermic and exothermic reactions
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Chip-DSC 10

Linseis Chip DSC 10
  • The perfect DSC for Quality control and Education
  • Cost effective, space saving and highly innovative Chip DSC
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Chip-DSC 100

Linseis Chip-DSC 100
  • Unique Chip Technology – The next step in DSC
  • Modular expandable design (Sample Robot, Cooling options etc.)
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DSC PT 1000

STA PT 1000
  • State of the Art DSC with user exchangable Metal Sensors
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DSC PT 1600

STA oder TGA PT 1600
  • Modular high temperature DSC
  • Determination of specific heat (Cp) and enthalpy from high temperature metals and ceramics
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LSR-3

Linseis LSR-3

Most advanced Seebeck Coefficient and Electric Resistivity (LSR) characterization of Bulk material and Thin-Films

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STA PT 1000

STA PT 1000
  • (TGA) Thermo- gravimety and (DSC) Differential Scanning Calorimetry
  • True top loading TG-DSC heat flux sensors
  • Numerous user excheangable TG, TG-DSC and TG-DTA sensors for any kind of application
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STA PT 1600

STA oder TGA PT 1600
  • (TGA) Thermo- gravimety and (DSC) Differential Scanning Calorimetry
  • True top loading TG-DSC heat flux sensors
  • Numerous user excheangable TG, TG-DSC and TG-DTA sensors for any kind of application
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STA HP 1/2 High Pressure

Linseis STA Hochdruck
  • Worlds only pressure TG-DSC (STA)
  • Combined (TGA) Thermogravimetry – (DSC) Differential Scanning Calorimetry
  • Different Gas and Vapor Dosing accessories
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TFA

Linseis TFA

Unique device for a comprehensive thin film characterization from the nm to the µm scale

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LFA 500

LFA 500 Linseis

LFA 500 – LightFlash Analyzer – The robust workhorse

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LFA 1000

LFA-1000

LFA 1000 – True LaserFlash Analyzer – The premium device

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