ION-SENSITIVE MEASURING ELECTRODE DEVICE

摘要

An ion-sensitive measuring electrode device with an ion-sensitive element based on ion-conducting crystalline ceramic material is provided. The electrode device shows a selectivity to the Na+ ion versus the H+ ion corresponding to the selectivity of the known sodium-sensitive glass-based solid membrane electrodes. Ion-sensitive measuring electrode devices showing good selectivity properties are provided on the basis of ion-conducting crystalline material, the crystal structure of which comprises a three-dimensionally extending interstitial space containing positions for the ion, especially material in which the interstitial space has bottlenecks which just permits passage of the ion. A method for preparing polycrystalline ceramic material based on oxides of zirconium, phosphor and silicon is also provided.