Optimization of a sensor for a Tian–Calvet calorimeter with LTCC-based sensor discs

Abstract

Abstract. In this work, it is shown how a finite element method (FEM) model of a Tian-Calvet calorimeter is used to find improvements in the sensor design to increase the sensitivity of the calorimeter. By changing the layout of the basic part of the sensor, which is a low temperature co-fired ceramics (LTCC) based sensor disc, an improvement by a factor of 3 was achieved. The model was validated and the sensors were calibrated with a set of measurements that were later used to determine the melting enthalpies and melting temperatures of indium and tin samples. Melting temperatures showed a maximum deviation of 0.2 K while the enthalpy was measured with a precision better than 1 % for most samples. The values for tin deviate by less than 2 % from literature data.

Measurement of Solubility and Molecular Simulation of Dissolution Behavior of Isonicotinamide in 15 Pure Solvents

“…The results of T m−In = 429.66 K, Δ fus H −In = 3.42 kJ/mol and T m−Zn = 692.77 K, Δ fus H −Zn = 7.28 kJ/mol. The T m and Δ fus H of zinc determined by DSC8000 were very close to those in references (for indium, T m−In = 429.7545 K, 14 429.7485 K; 15 Δ fus H −In = 3.45 kJ/mol, 14 3.28 kJ/mol; 16 and for zinc, T m = 692.65 K, 17 696 K, 18 692.81 K; 19 Δ fus H −Zn = 7.30 kJ/mol, 18 7.32 kJ/mol 19 ). This demonstrated that the accuracy of the DSC instrument was reliable.…”