Ion-selective measuring electrode device
US4686012A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1986 |
| Grant date | Aug 11, 1987 |
| Priority date | — |
| Expiry date | Oct 1, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/81
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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.sup.+ ion versus the H.sup.+ 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.