Highlights
THERMAL DIFFUSIVITY MEASUREMENTS MADE WITH LASER PRECISION
The Universal, Off-the-shelf Laser Flash Analyzer for the Metal, Glass and Ceramics Industry
Experience exceptional accuracy and versatility with our advanced thermal analysis system, which is engineered to rapidly and precisely characterize the thermal properties of a wide range of materials.
Broad temperature range: Designed for high-temperature measurements up to 1600°C, it delivers reliable results even under the most demanding conditions.
Automatic Sample changer: Boost your productivity with the LFA 707 StratoFlash® Classic's automatic sample changer. It enables precise analysis of up to five samples under identical conditions, allowing you to conduct faster research and development and quality control.
Precise laser system: Thanks to its monochromatic, coherent, collimated beam, our system achieves exceptional measurement precision, enabling you to detect the slightest variations in thermal behavior.
Wide choice of sample holders: Whether you work with solids, liquids, pastes, powders, or complex composites—including anisotropic and multilayered structures—this instrument adapts seamlessly to your needs.The system supports round and square sample geometries ranging from 6 to 25.4 mm, and provides a non-destructive testing method to keep your samples intact for further analysis or use.
Advanced calculation models and perfect fit: With intuitive, advanced calculation models, you’ll enjoy effortless data evaluation, perfect curve fitting, and reliable results.
Automatic Sample Changer for Three or Five Samples
Experience next-level performance with the LFA 707 StratoFlash® Classic. Its fully automatic sample changer enables you to measure multiple samples under identical conditions, ensuring consistent and comparable results every time. This intelligent automation dramatically increases productivity, making the LFA 707 StratoFlash® Classic ideal for research laboratories, product development teams, and quality control environments that demand precision and efficiency. The LFA 707 StratoFlash® Classic streamlines your workflow, making it faster and more reliable than ever.
Smart Sample Organization for Maximum Lab Efficiency
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 Laser Flash Method
The Laser 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:
λ(T) = α(T)⋅cp(T)⋅ρ(T)
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)]
- α = 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]
- 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
| LFA 707 StratoFlash® Classic | |
|---|---|
| Temperature Range | RT to 1600°C |
| Heating rate | 0.01 K/min to 50 K/min |
Automatic Sample Changer (ASC) | Sample holder support with 3 insets for samples ≤25.4 mm Sample holder support with 5 insets for samples ≤12.7 mm |
| 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 | 0.01 mm2/s to 2000 mm2/s |
| Thermal conductivity | 0.1 W/(m·K) to 4000 W/(m·K) |
| Laser System | Pulsed Nd: Glass
|
| Accuracy* | |
| Repeatability** | |
| Measurement atmospheres | Inert or vacuum (<2x 10-5 mbar; turbo molecular pump) |
| IR detector | InSb: RT to 1600°C, optional LN2 refill system including 35 liter dewar |
Software including calculation and correction models | Each model can be combined with 4 different baseline corrections (incl. shifted baseline) and w/o pulse correction; display of detector signal and model fit, data export; various special and extended models |
Specimen dimensions and shapes*** | Round: 6 mm, 8 mm, 10 mm, 12.7 mm, 20 mm, 25.4 mm; thickness: 0.1 mm to 6 mm Square: 10 mm x 10 mm, 20 mm x 20 mm; thickness: 0.1 mm to 6 mm |
Special sample holder systems |
|
* Deviation of the measured value from the "true value" (literature value) according to validation with reference materials. ** Deviation using the same operator and equipment over a short time according to validation with reference materials. *** Additional sample holders upon request. | |
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 new NETZSCH LFA software sets new standards in performance and usability, combining advanced automation with exceptional flexibility. Powered by a robust 64-bit architecture and an integrated SQL database, its modern user interface ensures lightning-fast loading times, minimal memory usage and an intuitive, seamless experience from start to finish.
The latest software generation features the NETZSCH Assistant – your intelligent guide to streamlined operation. This powerful tool gives you a clear overview of all connected instruments and available software functions, ensuring a seamless, efficient workflow right from the start.
Software Advantages
- Modern user interface with intuitive navigation
- Powerful SQL database for fast processing
- Compatible with historic NETZSCH LFA data
- Advanced calculation models
- High flexibility through a combination of automation and manual control
- Automated Measurement Evaluation
- Export to common formats for seamless further processing
This instrument is LabV®️-ready.
Turn data into better products with LabV®—a centralized, AI-driven material intelligence platform that integrates data from this instrument and any other data sources. Designed for R&D and QC engineers, LabV® enables data-driven decision-making to drive innovation and ensure consistently high-quality results.
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