Linseis Thermal analysis:
We offer a complete line of thermal analysis instruments for research and quality control including:
- Differential Scanning Calorimeter – (DSC)
- Thermobalances (TGA)
- Simultaneous Thermal Analysis – (TG-DSC)
- Thermomechanical Analysis – (TMA)
- Single / Differential / Quattro Dilatometer (DIL)
- Quenching Dilatometer / Laser Dilatometer (DIL)
- Laser Flash / Xenon Flash Analyzer (LFA)
- Laser Flash for thin films TF-LFA (Time Domain Thermoreflectance)
- Evolved gas Analysis (EGA) with FTIR and mass spectrometer
- Seebeck and electrical resistivity Analyser (LSR)
- Transient Hot Bridge (THB) & Heat FLow Meter (HFM)
First of all the Thermal power, thermoelectric power, or Seebeck coefficient of a
material defines the magnitude of an induced thermoelectric voltage in
response to a temperature difference across that material. The thermal
power has units of (V/K).
In recent years much interest has been shown in various methods of di-rect conversion of heat into electricity. Waste heat from hot engines and
combustion systems could save billions of dollars if it can be captured
and converted into electricity via thermoelectric devices. For this chal-lenging application Linseis has developed a characteristic evaluating
instrument; the LSR-4 “LINSEIS – Seebeck & Electric Resistivity Unit”.
The LSR-4 can simultaneously measure both Seebeck coefficient and
electric resistance (Resistivity and ZT with the Harman-Method).
• Prism and cylindrical samples with a length between 6 to 23mm can be
analyzed (Prism samples required for Harman-Method)
• Wires and Foils can be analyzed with a unique measurement adapter
• Four different exchangeable furnaces cover the temperature range from
-100 up to 1500°C
• The design of the sample holder guarantees highest measurement reproducibility
• State of the art software enables automatic measurement procedures
Three different exchangable furnaces cover the temperature range from
-100° up to 1500°C. Additionally the infrared furnaces enable very high
heating and cooling rates and the advantage of the most accurate tem-
perature regulation according to the set temperature profile.
In addition sample of cylindrical or prism shape is vertically positioned between two
electrodes. The lower electrode block contains a heater, while the entire
measuring arrangement is located in a furnace. The furnace surrounding
the measuring arrangement heats the sample to a specified temperature. At
this temperature the secondary heater in the lower electrode block creates
a set temperature gradient. Two contacting thermocouples then measure
the temperature gradient T1 and T2. A unique thermocouple contact me-chanism permits highest temperature accuracy measurements of the elec-tromotive force dE at one wire of each of the two thermocouples.
The dc four-terminal method is used to measure the Electric Resis-tance. By applying a constant current (I) at both ends of the sample and
measuring the change in voltage (dV) between one wire at each of the
two thermocouple pairs.