Young's modulus and damping of partially sintered potassium sodium niobate (KNN) ceramics and its temperature dependence determined via the impulse excitation technique (IET)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F24%3A43929043" target="_blank" >RIV/60461373:22310/24:43929043 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0955221924003030" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0955221924003030</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jeurceramsoc.2024.03.064" target="_blank" >10.1016/j.jeurceramsoc.2024.03.064</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Young's modulus and damping of partially sintered potassium sodium niobate (KNN) ceramics and its temperature dependence determined via the impulse excitation technique (IET)

Popis výsledku v původním jazyce

Potassium sodium niobate (KNN) is suitable for the preparation of lead-free piezoelectric ceramics, and thus the elastic properties and damping behavior should be reliably known for practical applications. In this work we compare partially sintered KNN ceramics prepared by uniaxial and conventional sintering from three different KNN powders and show that the impulse excitation technique (IET) is perfectly suited to determine Young&apos;s modulus at room temperature as well as the temperature dependence of Young&apos;s modulus and damping (heatingcooling cycles with maximum temperature 800 degrees C). Room temperature values of the effective Young&apos;s modulus of partially sintered KNN ceramics are below the predictions for convex pores and above a recently published numerical benchmark relation for concave pores. The phase transition temperatures determined by the IET are 160-190 degrees C for the low-temperature orthorhombic-tetragonal / tetragonal-orthorhombic transition and 388-412 degrees C for the high-temperature tetragonal-cubic / cubic-tetragonal transition, with hysteresis 12-25 K.

Název v anglickém jazyce

Young's modulus and damping of partially sintered potassium sodium niobate (KNN) ceramics and its temperature dependence determined via the impulse excitation technique (IET)

Popis výsledku anglicky

Potassium sodium niobate (KNN) is suitable for the preparation of lead-free piezoelectric ceramics, and thus the elastic properties and damping behavior should be reliably known for practical applications. In this work we compare partially sintered KNN ceramics prepared by uniaxial and conventional sintering from three different KNN powders and show that the impulse excitation technique (IET) is perfectly suited to determine Young&apos;s modulus at room temperature as well as the temperature dependence of Young&apos;s modulus and damping (heatingcooling cycles with maximum temperature 800 degrees C). Room temperature values of the effective Young&apos;s modulus of partially sintered KNN ceramics are below the predictions for convex pores and above a recently published numerical benchmark relation for concave pores. The phase transition temperatures determined by the IET are 160-190 degrees C for the low-temperature orthorhombic-tetragonal / tetragonal-orthorhombic transition and 388-412 degrees C for the high-temperature tetragonal-cubic / cubic-tetragonal transition, with hysteresis 12-25 K.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20504 - Ceramics

Projekt

<a href="/cs/project/GA22-25562S" target="_blank" >GA22-25562S: Impulzní excitace jako nekonvenční metoda k monitorování fázových přeměn a mikrostrukturních změn během tepelného zatížení materiálů</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of the European Ceramic Society

ISSN

0955-2219

e-ISSN

1873-619X

Svazek periodika

44

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

6501-6509

Kód UT WoS článku

001239447100001

EID výsledku v databázi Scopus

2-s2.0-85189656367