Thermal Diffusivity/Conductivity,
Seebeck Coefficient/Electrical Conductivity and
Time Domain Thermoreflectance

LFA / SBA / NanoTR/PicoTR

Thermal conductivity and diffusivity are the most important thermophysical material parameters for the description of the heat transport properties of a material or component.

Usually, thermal conductivity is determined by Heat Flow Meters (HFM) and Guarded Hot Plate (GHP).

For the precise measurement of thermophysical properties like the thermal diffusivity, the Laser Flash technique (LFA) has proven itself as a fast, versatile and precise absolute method. NETZSCH offers four LFA models, covering the entire spectrum of materials and temperatures.

NETZSCH instruments are based on the respective instrument and application standards for LFA (e.g., ASTM E1461, DIN EN 821, BS EN 1159-2, ASTM C714, etc.).

In order to be deemed suitable, thermoelectric materials should be characterized by high electrical conductivity, a large Seebeck coefficient and low thermal conductivity. The extent to which it will be possible to use thermoelectric generators in the future will depend upon the performance of the materials.

Instruments for the determination of thermal conductivity, thermal diffusivity, c_p determination and density are also included in the NETZSCH product range. NETZSCH thus offers a complete solution for determining the ZT value.

LFA 467 HT HyperFlash^® – Light Flash Apparatus

The LFA 467 HT HyperFlash^® allows for accurate thermal diffusivity and thermal conductivity measurements between RT and 1250°C with the smallest footprint on the market. The Ultra-fast sampling rate and extremely short pulse widths enable measurements of thin and highly conductive materials.

SBA 458 Nemesis^®

Thermoelectric materials should possess high working temperatures and optimized efficiency. The relative performance is described by the figure of merit (ZT). It highlights the importance of the Seebeck coefficient with respect to the performance. The SBA 458 Nemesis^® allows for simultaneous measurement of the Seebeck coefficient and electrical conductivity under indentical conditions.

LFA 467 HyperFlash^® – Light Flash Apparatus

The new LFA 467 HyperFlash^® features a wide temperature range, very high efficiency (with its sample changer for 16 samples), extremely fast data acquisition rates and an intelligent lens system (ZoomOptics) between the sample and detector.

NanoTR/PicoTR – Time Domain Thermoreflectance

The innovative Time Domain Thermoreflectance instruments provided by NETZSCH offer state-of-the-art thermophysical properties testing down into the Nanometer range.

LFA 427 - Laser Flash Apparatus / Pyrometer version for up to 2800°C

Outstanding attributes of the LFA 427 are high precision and reproducibility, short measuring times, variable sample holders and precisely adjustable atmosphere conditions in the application range from -120°C to 2800°C. The LFA 427 is the most powerful LFA system for use in research & development.

TDW 4040

Test Chamber for Determining the Stationary Heat Transfer Properties with a Heat Flow Meter in Accordance with DIN EN 1934

LFA 457 MicroFlash^® - Laser Flash Apparatus

The LFA 457 MicroFlash^® is the most modern product for the determination of the two thermophysical properties, thermal diffusivity and conductivity, in the range from -125°C to 1100°C. Its compact, vacuum-tight construction, automatic sample changer and functional software guarantee the highest effectiveness for challenging materials testing.

TDW 4140 and TDW 4240

Test Chamber for Determining the Stationary Heat Transfer Properties with a Controlled Hotbox in Accordance with DIN EN ISO 8990, DIN EN 1946-4, DIN EN ISO 12567, DIN EN 12412-2, and ASTM C1363; and Combined in Accordance with DIN EN 1934

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