Low Temperature Differential Dilatometer.

High-pressure dilatometer

A high-pressure dilatometer capable of measuring volume changes of 2 X loo6 cm3 is described. Fractional volume changes of 1 part in lo4 can be measured over a temperature range of 30-90 “C, and a pressure range of 1 bar (0.1 MPa)-3 kbar (300 MPa). The dilatometer is constructed out of a commercial high-pressure valve and a compact home-built pressure sensor. The system was specially designed t...

Versatile and compact capacitive dilatometer

We describe the design, construction, calibration, and operation of a relatively simple differential capacitive dilatometer suitable for measurements of thermal expansion and magnetostriction from 300 to below 1K with a low-temperature resolution of about 0.05Å. The design is characterized by an open architecture permitting measurements on small samples with a variety of shapes. Dilatometers of...

Low-temperature differential-thermal analysis to measure variations in entropy.

We describe how we can precisely measure variations in the entropy S of small solid samples below room temperature, as a function the temperature T or the external magnetic field H, respectively. A simple differential-thermal analysis technique allows, in principle, for the measurement of variations in S without any instrumental broadening of the data. The method is particularly well suited for...

Simulation of Dilatometer Tests by Neural Networks

Rock rigidity may be experienced in a wide range depending on several factors, and different methods can be used to consider their load-deformation behaviors. In this context, dilatometer tests (DTs) can be applied to obtain the modulus of elasticity of rock masses; therefore, it is possible to evaluate in-situ stress-strain behavior of rock masses realistically. Nevertheless, the application o...

Low-temperature sterilization using low-temperature steam and formaldehyde