Description
To the point
The main area of application of the LINSEIS L76 dilatometer series is the CTE measurement of ceramics, bricks, tiles, porcelain and building materials.
It is also widely used for quality control in the ceramics and metal industry.
Thanks to the flexible interchangeable furnaces, the dilatometer covers a wide temperature range from RT to 1000°C, 1400°C and 1600°C.
The measuring systems are made of either quartz glass (up to 1100°C) or Al2O3 (up to 1600°C).
The sensor is an LVDT (Linear Variable Differential Transformer) with maximum precision and infinitely variable resolution.
In combination with our LINSEIS software, the dilatometer offers an excellent solution for CTE measurements in standard quality control.
The following physical properties can be measured with the device: CTE, linear thermal expansion, sintering temperature, phase transformations, softening points, decomposition temperatures and glass transition temperatures.
Unique features
Flexible interchangeable ovens for temperatures
from RT to 1000°C, 1400°C and 1600°C
High-precision LVDT
sensor with infinitely
variable resolution
LINSEIS software package for excellent CTE measurements
Measurement of the following physical properties:
CTE, linear thermal expansion, Alpha Physical,
sintering temperature, phase transformations,
softening points, Decomposition temperatures,
glass transition temperatures
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Specifications
MODEL | DIL L76* |
|---|---|
| Temperature range: | RT … 1600°C |
| LVDT | |
| Delta L resolution: | 0,05 nm (digital) |
| Measuring range: | +/- 2500 µm |
| Contact force: | Manual adjustment up to 1 N |
| Optical encoder | |
| Delta L resolution: | 1 nm |
| Measuring range: | +/- 25000 µm |
| Automatic sample length detection: | yes |
| Force modulation: | no |
| Contact force: | Manual adjustment up to 3N |
| Multiple oven configuration: | optional |
| Gas metering: | Manual gas dosing or mass flow controller 1/3 or more gases |
| Contact force adjustment: | – |
| Single and double dilatometer: | – |
| Softening point detection: | inclusive |
| Density determination: | optional |
| L-DTA: | optional |
| Rate-controlled sintering (RCS): | optional |
| Thermal library (database): | optional |
| Electrical thermostatting of the measuring head: | inclusive |
| Low temperature measurement option: | LN2 |
| Vacuum-tight construction: | – |
| Automatic evacuation system: | – |
| OGS Oxygen Getter: | – |
| *Specifications depend on the configurations |
|---|
Accessories
- Devices for sample preparation
- Caliper for manual or online entry of the sample length
- Various gas boxes: manual, semi-automatic and MFC controlled
- Software option: rate-controlled sintering (RCS)
- Various sample holders (size, material)
Software
Making values visible and comparable
The powerful LINSEIS thermal analysis software, which is based on Microsoft® Windows®, performs the most important function in the preparation, execution and evaluation of thermoanalytical experiments, in addition to the hardware used. With this software package, Linseis offers a comprehensive solution for programming all device-specific settings and control functions, as well as for data storage and evaluation. The package was developed by our in-house software specialists and application experts and has been tried and tested over many years.
Dilatometer functions
- Glass transition and softening point determination
- Automatic softening point switch-off, freely adjustable (system protection)
- Display of absolute or relative shrinkage or expansion
- Representation and calculation of technical / physical expansion coefficients
- Rate-controlled sintering (software option)
- Sintering process evaluation
- Density determination
- Automatic evaluation routines
- System correction (temperature, zero curve, etc.)
- Automatic zero point adjustment
- Automatic punch contact pressure control
General functions
- Real-time color display
- Automatic and manual scaling
- Display of the axes freely selectable (e.g. temperature (x-axis) against delta L (y-axis))
- Mathematical calculations (e.g. first and second derivatives)
- Saving complete evaluations
- Multitasking function
- Multi-user function
- Zoom option for various curve sections
- Any number of curves can be loaded on top of each other for comparison
- Online Help Menu
- Free labeling
- EXCEL® and ASCII export of measurement data
- Data smoothing
- Zero curves are offset
- Cursor function
- Statistical curve evaluation (mean value curve with confidence interval)
- Tabular printout of the data and expansion coefficients
- Calculation of Alpha Phys, Alpha Tech, relative expansion L/L0
- Curve arithmetic, addition, subtraction, multiplication
Applications
Application example: Glass sample, softening point
To measure a glass sample up to the softening point, a function can be set in the measuring program of the software to stop the heating when the softening point is reached.
The setting can be specified in µm or in % of the change in length.
If the set value of the measured ramp is exceeded due to the deformation caused by the softening of the material, the program switches to the next ramp, in which, for example, cooling is programmed or the heating is automatically switched off.
This allows the softening point to be measured automatically without manual intervention and at the same time protects the sample holder.
Well informed
