Development
of a universal constant rate thermal analysis system for being used with any
thermoanalytical instrument |
| |
Authors: | J M Criado L A Pérez-Maqueda M J Diánez P E Sánchez-Jiménez |
| |
Institution: | 1.Instituto de Ciencia de Materiales de
Sevilla,Centro Mixto Universidad de Sevilla-C.S.I.C.,Sevilla,Spain |
| |
Abstract: | The SCTA method implies to control the temperature in such a way that
the reaction rate changes with the time according to a function previously
defined by the user. Constant Rate Thermal Analysis (CRTA) is one of the most
commonly used SCTA methods and implies achieving a temperature profile at
which the reaction rate remains constant all over the process at a value previously
selected by the user. This method permits to minimize the influence of heat
and mass transfer phenomena on the forward reaction. The scope of this work
is to develop a universal CRTA temperature controller that could be adapted
to any thermoanalytical device. The thermoanalytical signal is programmed
to follow a preset linear trend by means of a conventional controller that
at the time controls a second conventional temperature programmer that forces
the temperature to change for achieving the trend programmed for the thermoanalytical
signal. Examples of the performance of this control system with a Thermobalance
and a Thermomechanical Analyser (TMA) are given. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |