Description
To the point
The Linseis DIL L75 PT Horizontal and the DIL L75 PT Vertical are high-precision dilatometers for measuring thermal length changes in solids, liquids, powders and pastes.
The DIL L75 PT Horizontal offers a highly vacuum-tight design that enables measurements under vacuum as well as under oxidizing and reducing atmospheres.
The DIL L75 PT Vertical is characterized by its frictionless “Zero Friction” design, which is particularly suitable for sintering studies and materials with extremely low expansion.
Both systems feature high-resolution linear inductive displacement transducers that ensure maximum accuracy, reproducibility and long-term stability.
Thanks to the comprehensive thermostatization and optional adaptations for use in a glovebox, they are versatile in use.
In addition, both models offer automatic pressure control, which allows the contact pressure to be varied depending on the application and keeps it constant throughout the measurement.
The following physical properties can be measured:
- CTE (expansion coefficient)
- Linear thermal expansion
- Sintering temperature
- Phase transformations
- Softening points
- Decomposition temperatures
- Glass transition temperatures
The cryogenic option of the DIL L75 PT Vertical enables measurements at temperatures from -263°C to +220°C, offers various sample holders, vacuum operation and controlled atmospheres and ensures maximum accuracy and easy handling.
Unique features
Highly vacuum-tight push rod dilatometer
Measurements under vacuum
and controlled oxidizing or
reducing atmospheres
Highest accuracy and
reproducibility due to
high-resolution inductive
displacement transducer
and thermostatization
Automatic pressure control for
continuous contact pressure
between 10 and 1000 mN
Optional separation of mechanical and electrical
components for use in “glovebox”
Friction-free “Zero Friction”
design, ideal for sintering
studies and ULE materials
Compact design with optional
turntable for additional furnaces
Cryo option for measurements at
temperatures from -263°C to +220°C
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Specifications
Black on white
MODEL | DIL L75 Horizontal* |
|---|---|
| Temperature range: | -180 up to 2800°C |
| LVDT | |
| Delta L resolution: | 0,03 nm |
| Measuring range: | +/- 2500 µm |
| Contact force: | 10 mN up to 1 N |
| Optical Encoder | |
| Delta L resolution: | 0,1 nm |
| Measuring range: | +/- 25000 µm |
| Automatic sample length detection: | yes |
| Force modulation: | yes |
| Contact force: | 10 mN up to 5N |
| Multiple furnace configuration: | up to 2 furnaces |
| Motorized furnace operation: | optional |
| Gas dosing: | manual gas dosing or mass flow controller 1,3 or more gases |
| Contact force adjustment: | included |
| Single/double dilatometer: | optional |
| Softening point detection: | included |
| Density determination: | included |
| L-DTA: | optional (up to 2000°C) |
| Rate controlled sintering (RCS): | included |
| Thermal library: | included |
| Electric thermostatization of measuring head: | included |
| Low temperature options: | LN2, Intracooler |
| Vacuum tight design: | yes |
| Automatic evacuation system: | optional |
| OGS oxygen getter system: | optional |
| *Specs depend on configurations | |
MODEL | DIL L75 Vertical* |
|---|---|
| Temperature range: | -263 up to 2800°C |
| LVDT | |
| Delta L resolution: | 0,03 nm |
| Measuring range: | +/- 2500 µm |
| Contact force: | 10 mN up to 1 N |
| Optical Encoder | |
| Delta L resolution: | 0,1 nm |
| Measuring range: | +/- 25000 µm |
| Automatic sample length detection: | yes |
| Force modulation: | yes |
| Contact force: | 10 mN up to 5N |
| Multiple furnace configuration: | up to 3 furnaces |
| Motorized furnace operation: | optional |
| Gas dosing: | manual gas dosing or mass flow controller 1,3 or more gases |
| Contact force adjustment: | included |
| Single/double dilatometer: | optional |
| Softening point detection: | included |
| Density determination: | included |
| L-DTA: | optional (up to 2000°C) |
| Rate controlled sintering (RCS): | included |
| Thermal library: | included |
| Electric thermostatization of measuring head: | included |
| Low temperature options: | LN2, Intracooler |
| Vacuum tight design: | yes |
| Automatic evacuation system: | optional |
| OGS oxygen getter system: | optional |
| *Specs depend on configurations | |
Furnace program
DIL L75 PT Horizontal
TEMPERATURE | TYPE | HEATING ELEMENT | ATMOSPHERE | TEMPERATURE SENSOR |
|---|---|---|---|---|
| -180°C – 500°C | L75/264 | Thermo coax | inert, oxid., red., vac. | Type K |
| -180°C – 700°C | L75/264/700 | Thermo coax | inert, oxid., red., vac. | Type K |
| -180°C up to 1000°C | L75/264/1000 | Thermo coax | inert, oxid., red., vac. | Type K |
| RT – 1000°C | L75/220 | SiC, Kanthal | inert, oxid., red., vac. | Type K |
| RT – 1400°C | L75/230 | SiC, Kanthal | inert, oxid., red., vac. | Type S |
| RT – 1600°C | L75/240 | SiC | inert, oxid., red., vac. | Type S |
| RT – 1650°C | L75/240 PT | Platinum | inert, oxid., vac. | Type S |
| RT – 2000°C | L75/260 | Graphite | N2/Vac. | Type C and/oder Pyrometer |
| RT – 2800°C | L75/280 | Graphite | N2/Vac. | Pyrometer |
DIL L75 PT Vertical
TEMPERATURE | TYPE | HEATING ELEMENT | ATMOSPHERE | TEMPERATURE SENSOR |
|---|---|---|---|---|
| -263°C – 300°C | L75/264 He | Thermo coax | inert, oxid., red., vac. | Semiconductor / Pt 100 |
| -180°C – 500°C | L75/264 | Thermo coax | inert, oxid., red., vac. | Type K |
| -180°C – 700°C | L75/264/700 | Thermo coax | inert, oxid., red., vac. | Type K |
| -180°C up to 1000°C | L75/264/1000 | Thermo coax | inert, oxid., red., vac. | Type K |
| RT – 1000°C | L75/220 | SiC, Kanthal | inert, oxid., red., vac. | Type K |
| RT – 1400°C | L75/230 | SiC, Kanthal | inert, oxid., red., vac. | Type S |
| RT – 1600°C | L75/240 | SiC | inert, oxid., red., vac. | Type S |
| RT – 1650°C | L75/240 PT | Platinum | inert, oxid., vac. | Type S |
| RT – 1750°C | L75/240 M | MoSi2 | inert, oxid., red., vac. | Type B |
| RT – 2000°C | L75/260 | Graphite | N2/Vac. | Type C and/oder Pyrometer |
| RT – 2400°C | L75/270 | Graphite | N2/Vac. | Pyrometer |
| RT – 2800°C | L75/280 | Graphite | N2/Vac. | Pyrometer |
Accessories
- Devices for sample preparation
- Various sample holders (size, material)
- Caliper for manual or online entry of the sample length
- Turntable for up to 3 furnace
- Various gas boxes: manual, semi-automatic and MFC controlled
- Software option Rate Controlled Sintering (RCS)
- Various rotary and turbomolecular pumps
- Possibility of operation under 100% H2
- LN2 cooling
Software
Making values visible and comparable
- 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
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 ceramic
Dilatometry is an excellent method for determining the coefficient of thermal expansion (CTE) and the softening point of glass-ceramics.
In addition to the absolute expansion, the relative expansion and the coefficient of thermal expansion (CTE), the first derivative of the absolute expansion can also be calculated against the temperature.
The O-passage of the differentiation is the maximum of the thermal expansion and therefore the softening point of the material can be calculated exactly.
Application example: Ceramics / powder metallurgy
In the production process of high-tech ceramics, it is of great interest if the sintering process can be simulated.
With the optional RCS (rate controlled sintering) software package, it is possible to control the sintering process with the dilatometer according to the PALMOUR III model theory.
In this application, the sintering process of ZrO2 is controlled in such a way that a final density of 100% is achieved, as the heating rate is controlled as a function of the density.
Well informed
