caa a22 4500 467946221 CHVBK 20180322200725.0 cr unu---uuuuu 170328e19861001xx s 000 0 eng 10.1007/BF00553825 doi (NATIONALLICENCE)springer-10.1007/BF00553825 (NATIONALLICENCE)springer-10.1007/BF02403027 A humidity sensor using burned zircon with phosphoric acid: effect of strongly acidic protons on humidity sensitivity [Elektronische Daten] [Yoshihiko Sadaoka, Yoshiro Sakai] Impedance and water sorption measurements have been made of burned zircon with phosphoric acid. In a humid atmosphere, the resistance which is approximated by the impedance is inversely proportional to the concentration of the strongly acidic PO-H group which results in an increase in the sorbed water. The addition of the strongly acidic PO-H formed on the particle surfaces leads to decreases in the resistance and its activation energy. For the element burned at 350° C in which the H3PO4/ZrSiO4 mole ratio is 0.2 or more, the resistance is 106Ω or below in a dry atmosphere and decreases with an increase in humidity. The humidity dependence of the resistance can be controlled not only by the form of the porous insulating ceramic but also by the addition of the strongly acidic protons. The response times of the resistance for the surface-type element to the humidity changes are 3 min or below for both adsorption and desorption processes. Chapman and Hall Ltd, 1986 Sadaoka Yoshihiko Department of Industrial Chemistry, Faculty of Engineering, Ehime University, 790, Matsuyama, Japan aut Sakai Yoshiro Department of Industrial Chemistry, Faculty of Engineering, Ehime University, 790, Matsuyama, Japan aut Journal of Materials Science Kluwer Academic Publishers 21/10(1986-10-01), 3717-3723 0022-2461 21:10<3717 1986 21 10853 https://doi.org/10.1007/BF00553825 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00553825 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sadaoka Yoshihiko Department of Industrial Chemistry, Faculty of Engineering, Ehime University, 790, Matsuyama, Japan aut NATIONALLICENCE 700 1- Sakai Yoshiro Department of Industrial Chemistry, Faculty of Engineering, Ehime University, 790, Matsuyama, Japan aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers 21/10(1986-10-01), 3717-3723 0022-2461 21:10<3717 1986 21 10853 NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02403027 text/html Onlinezugriff via DOI Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE NATIONALLICENCE NL-springer