Packed with new automated features, the DIL 831 features the patented 1 nm resolution optical encoder, a family of new dynamic furnaces, and the new linear sample load motor. The result is the best performing horizontal single sample push-rod dilatometer available on the market.
An instrument offering scientists the ideal tool for R&D laboratories to measure the linear thermal expansion and to calculate the Coefficient of Thermal Expansion (CTE) of ceramics, glasses, high performance materials, polymers, metals and alloys with great accuracy. Features include:
- Linear motor for a sample load range of 0.01 to 1.00 N, with a force resolution of 0.01 N and linearity better than 0.01 N across the total measuring range of 5000 µm, to guarantee the correct sample load regardless of the material tested.
- Patented optical incremental encoder to bring length measurement resolution down to a best in class 1 nm, and to allow the measurement of shorter samples yet preserving an outstanding ∆L resolution. Its newly designed measuring head housing and the active electrical thermal stabilization ensure unprecedented stability of the detection core. This, combined with the unique design of TA Instruments furnaces, results in a zero temperature-gradient across the specimen and an industry leading CTE accuracy for single sample push rod dilatometers of 0.03 x 10-6 K-1 .
- Automatic recording of the initial sample length.
- Water cooled furnaces providing a very dynamic temperature programming with a maximum heating rate of 50 K/min and industry unmatched cool down time of 13 minutes from 1000°C to room temperature. This is up to 15 times shorter than competitive instruments.
- Integrated electronics providing network connection, while the integrated touch screen allows you to perform many functions directly on the instrument and shows, in real time, measurement parameters and test’s time-to-completion.
|Dilatometer type||Single sample horizontal push rod|
length / diameter
|0 to 25 mm / 12 mm|
|Material of sample holder:||Fused silica, Al2O3|
|Contact Force:||0.01 – 1.0 N|
|Change of length range:||5000 µm|
|Resolution ∆L:||1 nm, 0.05°C|
|Accuracy in α:||0.03 x 10-6 K-1|
|Atmosphere:||Vacuum, Inert gas, Air
optional gas unit with massflow controller and vacuum unit
|Temperature range:||RT – 1100°C
RT – 1500°C
RT – 1700°C
|Cooling rates||1100°C – RT: minimum 13 min
1500°C – RT: less than one hour
1700°C – RT: approximately one hour
The single sample horizontal push rod design is the most widely used technique to measure and determine a number of parameters key for the R&D, QC and production laboratories. It is used to study density changes and phase transitions, the influence of additives and the mixing of different raw materials, measure the Glass Transition Temperature (Tg) and Volumetric Expansion.
In this technique the specimen rests on a sample support that is contained in a sample holder, and a load is applied through a push-rod to maintain it in mechanical contact with the measuring system while it is subjected to a thermal treatment. Depending upon the temperature range, the material of the measuring system and sample holder can be of fused silica, alumina or graphite.
In the DIL 831, the dimensional changes are detected and measured by an innovative incremental optical encoder with a true resolution of 1 nm
In horizontal dilatometry a critical feature is the load applied on to the sample , especially in case of unknown, difficult or fast shrinking materials as, often, R&D laboratories are required to test. The correct load varies dependent upon the events to be measured, the rate at which they occur, the time, and the experiment’s temperature range. The DIL 831 linear magnetic motor ensures a very precise and truly constant load ranging from 0.01 to 1.0N across its entire measuring range of 5000μm.
polymers, ceramics, glasses, building materials, high performance materials, metals, alloys. Ideal to be used joined to Laser Flash instrumentation
Academia, Advanced Ceramics, Building Materials, Glass, Automotive, Aerospace, Defense, Metals and non-metals Industry, Electronics and micro-electronics, Renewable energies