Structure and properties of GeO2 modified borophosphate glasses

Kód výsledku v IS VaVaI

RIV/00216275:25310/15:39900088 - isvavai.cz

Výsledek na webu

http://dx.doi.org/10.1166/asem.2015.1683

DOI - Digital Object Identifier

10.1166/asem.2015.1683

Jazyk výsledku

angličtina

Název v původním jazyce

Structure and properties of GeO2 modified borophosphate glasses

Popis výsledku v původním jazyce

Structure, physico-chemical properties and thermal behaviour of GeO2-containing lithium borophosphate glasses in the compositional series (100-x)[0.4Li2O-0.4B2O3-0.2P2O5]-xGeO2 (x = 0-30 mol%) were investigated. According to the Raman spectra and 11B MASNMR spectra, the glass structure consists mostly of BO4 tetrahedra and planar BO3 triangles. P2O5 is incorporated in the structural network mostly in the form of tetrahedral PO4 metaphosphate (Q2) and diphosphate (Q1) units. The ratio of BO4/BO3 and Q2/Q1 structural units remains practically constant with increasing GeO2 content. This suggests that GeO2 formed mainly isolated GeOx units in the structural network. The incorporation of GeO2 the glass structure results only in a small changes of physico-chemical properties. Glass transition temperature, dilatometric softening temperature and chemical durability reveal a maximum, whereas molar volume and thermal expansion coefficient reveal a minimum at the glass with 15 mol% GeO2. DTA stu

Název v anglickém jazyce

Structure and properties of GeO2 modified borophosphate glasses

Popis výsledku anglicky

Structure, physico-chemical properties and thermal behaviour of GeO2-containing lithium borophosphate glasses in the compositional series (100-x)[0.4Li2O-0.4B2O3-0.2P2O5]-xGeO2 (x = 0-30 mol%) were investigated. According to the Raman spectra and 11B MASNMR spectra, the glass structure consists mostly of BO4 tetrahedra and planar BO3 triangles. P2O5 is incorporated in the structural network mostly in the form of tetrahedral PO4 metaphosphate (Q2) and diphosphate (Q1) units. The ratio of BO4/BO3 and Q2/Q1 structural units remains practically constant with increasing GeO2 content. This suggests that GeO2 formed mainly isolated GeOx units in the structural network. The incorporation of GeO2 the glass structure results only in a small changes of physico-chemical properties. Glass transition temperature, dilatometric softening temperature and chemical durability reveal a maximum, whereas molar volume and thermal expansion coefficient reveal a minimum at the glass with 15 mol% GeO2. DTA stu

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

—

Projekt

GA13-00355S: Vícesložková fosforečnanová a borofosforečnanová skla

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Advanced Science, Engineering and Medicine

ISSN

2164-6627

e-ISSN

—

Svazek periodika

7

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

"331?335"

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—