|
KMID : 0385519910040030289
|
|
Analytical Science & Technology
1991 Volume.4 No. 3 p.289 ~ p.293
|
|
|
Ion-Selectrode of Tungsten Carbide
|
|
Lee Kwang-Woo
Kim Taek-Jae
Lee Kyeong-Jae
Lee Eun-Bum
Lee Seon-Ha
Park Myon-Yong
|
|
|
Abstract
|
|
|
Silicon dioxide made from sodium silicate and carbon black were mixed´ to molar ratio of 1 :3´ and heated at 20000 for 2 hrs. under- helium atmosphere. The synthesized silicon carbide were crushed to fine particles. Silicon carbide particles of $000 mesh and 4000 mesh were mixed to 1 : l ratio with 2% PVA, pressed to disc type at 8ton/cm sintered
" -preliminarily at 1400C for l hr and sintered finally at 2100C for I hr. The sintered disc mem brane was shown specific resistivity 0.48f1cm_´, break strength 622kg/cm2, volume density 2.10 g/ml, porosity 15.6% and apparent density 3.06 g/ml. The silicon´ carbide selectrode was responded to cations only among 45 kinds of chemical species. The alkaline metal ions were responded to the order of Li>Na>K and alkaline earth ions were in the order of Ba>Sr >Ca>Mg>Be.´The transition metal ions of divalent were responded without any selectivity and with low potential. This selectrode was not responded to hydrogen ion in the range of pH 1.5 and 13.
|
|
|
KEYWORD
|
|
|
Silicon carbide ion-selectrode
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|