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http://dx.doi.org/10.4313/JKEM.2005.18.1.030

Microwave Dielectric Characteristics of Ba(Mg1/3Nb2/3)O3-La(Mg2/3Nb1/3)O3 Ceramics with Crystal Structure  

Paik, Jong-Hoo (요업기술원 전자소재기술개발사업단)
Lim, Eun-Kyeong (요업기술원 전자소재기술개발사업단)
Lee, Mi-Jae (요업기술원 전자소재기술개발사업단)
Jee, Mi-Jung (요업기술원 전자소재기술개발사업단)
Choi, Byung-Hyun (요업기술원 전자소재기술개발사업단)
Kim, Sei-Ki (요업기술원 전자소재기술개발사업단)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.18, no.1, 2005 , pp. 30-37 More about this Journal
Abstract
The microwave dielectric properties and their related structural characteristics in solid solutions of (1-$\chi$) Ba($Mg_{1/3}$Nb$_{2/3}$) $O_3$-$\chi$La(Mg$_{2/3}$Nb$_{1}$3) $O_3$(BLMN) have been investigated by measuring the dielectric constant($\varepsilon$r), Q value and temperature coefficient of resonant frequency($\tau$f) and by observing the crystal structure using high resolution transmission electron microscopy (HRTEM). Microwave dielectric properties showed characteristic features for specific composition. Dielectric constant($\varepsilon$$_{r}$) showed maximum value at the composition which corresponds to the phase boundary between 1 : 2 ordered and 1 : 1 ordered structure. The increase in $\varepsilon$$_{r}$ may be caused by the rattling of ions by incorporating smaller ions and the disordered structure. The variation of temperature coefficient of resonant frequency($\tau$$_{f}$) was investigated in terms of oxygen octahedra tilting.dra tilting.
Keywords
Dielectric resonator; Microwave; Qualify factor; Ordering; Oxygen octahedra tilting;
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