NDLI: Effects of LiF on microwave dielectric properties of 0.25Ca$_{0.8}$Sr$_{0.2}$TiO$_{3}$–0.75Li$_{0.5}$Nd$_{0.5}$TiO$

Content Provider	Springer Nature Link
Author	LIU, FEI YUAN, CHANGLAI LIU, XINYU QU, JING JING
Copyright Year	2015
Abstract	The effects of LiF addition on sinterability, microstructure and microwave dielectric properties of 0.25Ca$_{0.8}$Sr$_{0.2}$TiO$_{3}$–0.75Li$_{0.5}$Nd$_{0.5}$TiO$_{3}$ ceramics were investigated. The LiF addition enhanced the sintering temperature of 0.25Ca$_{0.8}$Sr$_{0.2}$TiO$_{3}$–0.75Li$_{0.5}$Nd$_{0.5}$TiO$_{3}$ ceramics from 1200 to 1300°C, because the LiF addition could compensate the evaporation of Li during the sintering process. It was found that the bulk density and dielectric constant ( ε $_{r}$) gradually decreased, the quality factor (Q $_{f}$) greatly increased and the temperature coefficient of resonant frequency (τ $_{f}$) shifted to a near-zero value with the increase in LiF addition. Obviously, excess Li addition could efficiently improve the microwave dielectric properties. In addition, 0.25Ca$_{0.8}$Sr$_{0.2}$TiO$_{3}$–0.75Li$_{0.5}$Nd$_{0.5}$TiO$_{3}$ + 4.0 wt% LiF ceramics sintered at 1350 $^{ ∘ }$C for 4 h exhibited good microwave dielectric properties of ε $_{r}$ ∼123.4,Q $_{f}$ ∼ 2209 GHz (at 2.43 GHz) and τ $_{f}$ ∼ 12.3 ppm $^{ ∘ }$C–1.
Starting Page	1223
Ending Page	1229
Page Count	7
File Format	PDF
ISSN	02504707
Journal	Bulletin of Materials Science
Volume Number	38
Issue Number	5
e-ISSN	09737669
Language	English
Publisher	Indian Academy of Sciences
Publisher Date	2015-10-10
Publisher Institution	Indian Academy of Sciences
Publisher Place	Bangalore, India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	0.25Ca$_{0.8}$Sr$_{0.2}$TiO$_{3}$–0.75Li$_{0.5}$Nd$_{0.5}$TiO$_{3}$ microwave dielectric properties microstructures LiF. Materials Science Engineering
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science

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