The influence of nickel on the chemistry of nickel-zinc phosphate glasses

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F25%3A39922770" target="_blank" >RIV/00216275:25310/25:39922770 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.jnoncrysol.2025.123401" target="_blank" >https://doi.org/10.1016/j.jnoncrysol.2025.123401</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2025.123401" target="_blank" >10.1016/j.jnoncrysol.2025.123401</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The influence of nickel on the chemistry of nickel-zinc phosphate glasses

Popis výsledku v původním jazyce

The glasses of the NiO-ZnO-P2O5 system were prepared in two compositional series formally expressed in oxides: metaphosphate series (A), i.e. without changing the anion, xNiO-(50-x)ZnO-50P2O5 and the metaphosphate to pyrophosphate series (B), i.e. with changing the anion, xNiO-(50-0.75x)ZnO-(50-0.25x)P2O5. Using magnetic susceptibility, Raman spectroscopy and electron absorption spectroscopy it was determined that all glasses containing nickel were paramagnetic with Ni2+ tetrahedral coordination. The Ni-O(P) bond was found to have a higher ionicity compare to Zn-O(P) bond. If metaphosphate is changed to pyrophosphate, series (B), glasses can only be prepared up to 20 mol% of NiO and at higher concentration crystalline nickel pyrophosphate appears. It follows that Ni2+ ions do not connect pyrophosphate structural units and are therefore unable to form a cationically linked glass network. The glass transition temperature and the coefficient of thermal expansion are related to the concentration of metaphosphates and, in principle, increase with rising nickel content.

Název v anglickém jazyce

The influence of nickel on the chemistry of nickel-zinc phosphate glasses

Popis výsledku anglicky

The glasses of the NiO-ZnO-P2O5 system were prepared in two compositional series formally expressed in oxides: metaphosphate series (A), i.e. without changing the anion, xNiO-(50-x)ZnO-50P2O5 and the metaphosphate to pyrophosphate series (B), i.e. with changing the anion, xNiO-(50-0.75x)ZnO-(50-0.25x)P2O5. Using magnetic susceptibility, Raman spectroscopy and electron absorption spectroscopy it was determined that all glasses containing nickel were paramagnetic with Ni2+ tetrahedral coordination. The Ni-O(P) bond was found to have a higher ionicity compare to Zn-O(P) bond. If metaphosphate is changed to pyrophosphate, series (B), glasses can only be prepared up to 20 mol% of NiO and at higher concentration crystalline nickel pyrophosphate appears. It follows that Ni2+ ions do not connect pyrophosphate structural units and are therefore unable to form a cationically linked glass network. The glass transition temperature and the coefficient of thermal expansion are related to the concentration of metaphosphates and, in principle, increase with rising nickel content.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Non-Crystalline Solids

ISSN

0022-3093

e-ISSN

1873-4812

Svazek periodika

652

Číslo periodika v rámci svazku

March 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

123401

Kód UT WoS článku

001416602300001

EID výsledku v databázi Scopus

2-s2.0-85214897777