Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 176, Issue 2, Pages 147-151Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mseb.2010.10.016
Keywords
Sintering; Non-stoichiometry; Microwave dielectric properties; Rock salt structure
Funding
- National Science Foundation of China (NSFC) [50872081]
- Shanghai Education Committee Program [09YZ29]
Ask authors/readers for more resources
Sintering behavior, microstructure and microwave dielectric properties of Li2+xTiO3 (0 <= x <= 0.2) ceramics have been studied by X-ray diffraction (XRD), scan electron microscopy (SEM), Raman spectra, dilatometery and microwave resonant measurement in this research. Homogeneous non-stoichiometric composition with rock salt structure existed for Li2+xTiO3 (0 <= x <= 0.2) ceramics. The sintering temperature was successfully reduced and highly densified sample could be obtained with appropriate excessive amount of lithium (x = 0.08). A transient reactive liquid phase sintering mechanism was proposed. The preferred orientation of grain growth and micro-cracks existed in the Li2TiO3 (x = 0) sample disappeared in the lithium excessive samples with x >= 0.08. The microwave dielectric properties varied significantly with the excessive amount of lithium. Optimized microwave dielectric properties were obtained for the x = 0.08 composition: epsilon(r) = 24.6, Q x f = 66,000 GHz, and tau(f) = 22.1 ppm/degrees C. (C) 2010 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available