Highlights
FOR HIGHLY ACCURATE AND FAST THERMAL DIFFUSIVITY MEASUREMENTS
The LFA 717 HyperFlash® is a state-of-the-art instrument designed to accurately measure the Thermal DiffusivityThermal diffusivity (a with the unit mm2/s) is a material-specific property for characterizing unsteady heat conduction. This value describes how quickly a material reacts to a change in temperature.thermal diffusivity of various materials. With its advanced calculation models, it is at the forefront of scientific innovation, ensuring accurate results essential for materials analysis.
Broad sample range: The LFA 717 HyperFlash® can accommodate a wide range of sample materials, including both round and square-shaped specimens. It features an automatic sample changer that can handle up to 16 samples simultaneously, increasing laboratory efficiency.
Flexible temperature control: The instrument offers remarkable flexibility in selecting the measurement range up to 500°C. Using liquid nitrogen, it can analyze samples at temperatures as low as -100°C. In addition, a compressed air unit allows subambient measurements down to 0°C. The integrated evacuation system permits measurements in defined atmospheres.
Advanced corrections specifically for thin or highly conductive samples: The latest version of our analysis software introduces an enhanced analysis pulse correction feature designed for high-precision applications where exceptional time resolution is critical. This enhancement is particularly beneficial when analyzing thin or highly conductive samples, and in situations where the light pulse coincides with the thermal response of the sample.
The LFA 717 HyperFlash® is an essential tool for researchers and industries requiring precise thermal property measurements, making it an invaluable asset in the field of materials science.
The top cover of the instrument serves as a convenient area for sample preparation and storage. It has been thoughtfully designed with four visually distinct sections, each corresponding to specific specimen locations within the furnace. This innovative layout simplifies sample identification and pre-assembly, minimizes instrument downtime, and is especially beneficial in multi-user environments.
Method
Efficient Determination of Thermophysical Properties with the Light Flash Method
The Light Flash (LFA) technique is a fast, absolute, non-destructive, and non-contact method for accurate measurement of Thermal DiffusivityThermal diffusivity (a with the unit mm2/s) is a material-specific property for characterizing unsteady heat conduction. This value describes how quickly a material reacts to a change in temperature.thermal diffusivity. This innovative approach not only determines Thermal DiffusivityThermal diffusivity (a with the unit mm2/s) is a material-specific property for characterizing unsteady heat conduction. This value describes how quickly a material reacts to a change in temperature.thermal diffusivity, but also characterizes the specific heat of materials when a reference sample is used.
In the LFA process, the front surface of a plane-parallel sample is heated by a short pulse of energy. An infrared (IR) detector measures the resulting temperature change on the back of the sample. From these data, both Thermal DiffusivityThermal diffusivity (a with the unit mm2/s) is a material-specific property for characterizing unsteady heat conduction. This value describes how quickly a material reacts to a change in temperature.thermal diffusivity and specific heat can be characterized.
To calculate the Thermal ConductivityThermal conductivity (λ with the unit W/(m•K)) describes the transport of energy – in the form of heat – through a body of mass as the result of a temperature gradient (see fig. 1). According to the second law of thermodynamics, heat always flows in the direction of the lower temperature.thermal conductivity, these thermophysical properties are combined with the DensityThe mass density is defined as the ratio between mass and volume. density using the formula:
Where:
- λ = Thermal ConductivityThermal conductivity (λ with the unit W/(m•K)) describes the transport of energy – in the form of heat – through a body of mass as the result of a temperature gradient (see fig. 1). According to the second law of thermodynamics, heat always flows in the direction of the lower temperature.thermal conductivity [W/(m·K)]
- a = Thermal DiffusivityThermal diffusivity (a with the unit mm2/s) is a material-specific property for characterizing unsteady heat conduction. This value describes how quickly a material reacts to a change in temperature.thermal diffusivity [mm²/s]
- Specific Heat Capacity (cp)Heat capacity is a material-specific physical quantity, determined by the amount of heat supplied to specimen, divided by the resulting temperature increase. The specific heat capacity is related to a unit mass of the specimen.cp= Specific Heat Capacity (cp)Heat capacity is a material-specific physical quantity, determined by the amount of heat supplied to specimen, divided by the resulting temperature increase. The specific heat capacity is related to a unit mass of the specimen.specific heat capacity [J/(g·K)]
- ρ = DensityThe mass density is defined as the ratio between mass and volume. density [g/cm³]
With its ability to analyze a wide range of materials at various temperatures, the LFA technique is essential for researchers and industries focused on understanding thermal properties in depth.
Specifications
Proven Excellence in Service
At NETZSCH Analyzing & Testing, we offer a comprehensive range of services globally to ensure the optimal performance and longevity of your thermoanalytical equipment. With a track record of proven excellence, our services are designed to maximize the effectiveness of your devices, extend their lifespan, and minimize downtime.
Unlock the full potential of your equipment with our tailored solutions, backed by years of industry expertise and innovation.
Software
Proteus® Software for LFA - Fast, efficient, and seamlessly integrated!
The Proteus® 64-bit software is designed to be licensed with each instrument, allowing users to simultaneously connect multiple instruments via USB or run the software on secondary installations on different computer systems. Integrated into the NETZSCH Assistant starting with version 9.5, this software suite links a wide range of NETZSCH instruments and various third-party applications into a cohesive management platform.
A significant enhancement specific to Laser Flash Analysis (LFA) is the transition from the previous database format to a new, faster SQL database format. This upgrade in data architecture results in improved modeling times and can deliver results up to 2.5 times faster while using less memory. As a result, users can now store an almost unlimited number of measurements in a single database. All standard database management functions, including import/export and data merging, are still fully supported.
This instrument is LabV®️-primed
LabV®️ takes the data from your analytical instrument: It automatically imports all measurement data into a central and secure database solution, the LabV®️ software. This allows you to visualize the data in LabV®️ and to make them searchable. Your data will now be accessible from anywhere. Moreover you have the possibility to generate reports.
Related Devices
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Downloads and Media
Videos
Innovations in Thermal ConductivityThermal conductivity (λ with the unit W/(m•K)) describes the transport of energy – in the form of heat – through a body of mass as the result of a temperature gradient (see fig. 1). According to the second law of thermodynamics, heat always flows in the direction of the lower temperature.Thermal Conductivity: The new NETZSCH LFA 717 HyperFlash®
This is an excerpt of our NETZSCH Tech Talk of December 2024.
