Hydrogen chloride detection by LiTaO3

✍ Scribed by M. Faccio; G. Ferri; P.P. Ponti; G. Savelli; A. D'Amico

• Book ID: 103960444
• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 525 KB
• Volume: 7
• Category: Article
• ISSN: 0925-4005
• DOI: 10.1016/0925-4005(92)80385-b

✦ Synopsis

A pyroelectric calorimeter for the amine-hydrogen chloride (HCI) reaction has been constructed by using spun amine in thin-film form and Cr-Au electrodes on a 2.5 cm diameter, 0.4 mm thick LiTaO, wafer, the counter (or common) electrode being of gold. The sensor is placed in a test chamber and hydrogen chloride admitted at a pressure close to atmospheric. Thermal signatures resulting from the amine-HCI interaction are observed through the gold electrodes. Concentrations of HCI in an HCI + N, mixture ranging from thousands down to 1 ppm are used. A miniaturized thermistor immersed in the amine layer is used to confirm and calibrate the temperature variation.