Characterization of Thermal Conductivity of SiO2–Al2O3–Y2O3 Glasses

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24210%2F15%3A00002771" target="_blank" >RIV/46747885:24210/15:00002771 - isvavai.cz</a>

Výsledek na webu

<a href="https://api.elsevier.com/content/article/eid/1-s2.0-S0040603115000118" target="_blank" >https://api.elsevier.com/content/article/eid/1-s2.0-S0040603115000118</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.tca.2015.01.010" target="_blank" >10.1016/j.tca.2015.01.010</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Characterization of Thermal Conductivity of SiO2–Al2O3–Y2O3 Glasses

Popis výsledku v původním jazyce

The thermal properties of SiO2–Al2O3–Y2O3 glasses were investigated within a temperature range of 25–800 °C. This found that glass with a composition of 24Y2O3.21Al2O3.55SiO2 exhibits a thermal conductivity of 1.04 W/m K at room temperature, and thermal conductivity increases with temperature due to an increase in the amount of bridging oxygen. The thermal conductivity of glasses with a composition of xY2O3.21Al2O3.(79-x)SiO2, on the other hand, decreased with an increase in either the Y2O3 content or Al2O3/SiO2 ratio. This decrease in thermal conductivity was analyzed with respect to the decrease in phonon mean free path resulting from the increased non-bridging oxygen content, which revealed 24Y2O3.21Al2O3.55SiO2 to have the maximum thermal conductivity of 1.7 W/m K at 800 °C. Glass systems incorporating yttria can therefore be considered suitable sintering additives for highly thermally conducting ceramics such as silicon nitride.

Název v anglickém jazyce

Characterization of Thermal Conductivity of SiO2–Al2O3–Y2O3 Glasses

Popis výsledku anglicky

The thermal properties of SiO2–Al2O3–Y2O3 glasses were investigated within a temperature range of 25–800 °C. This found that glass with a composition of 24Y2O3.21Al2O3.55SiO2 exhibits a thermal conductivity of 1.04 W/m K at room temperature, and thermal conductivity increases with temperature due to an increase in the amount of bridging oxygen. The thermal conductivity of glasses with a composition of xY2O3.21Al2O3.(79-x)SiO2, on the other hand, decreased with an increase in either the Y2O3 content or Al2O3/SiO2 ratio. This decrease in thermal conductivity was analyzed with respect to the decrease in phonon mean free path resulting from the increased non-bridging oxygen content, which revealed 24Y2O3.21Al2O3.55SiO2 to have the maximum thermal conductivity of 1.7 W/m K at 800 °C. Glass systems incorporating yttria can therefore be considered suitable sintering additives for highly thermally conducting ceramics such as silicon nitride.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Thermochimica Acta

ISSN

0040-6031

e-ISSN

—

Svazek periodika

604

Číslo periodika v rámci svazku

2015

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

1-6

Kód UT WoS článku

000351644300001

EID výsledku v databázi Scopus

2-s2.0-84961291462