Raman Spectroscopy of the Solid Solution Limit in $Li_{1-X}Al_{2X}Ta_{1-X}O_3$ System
1992
The upper limit of solid solution of in was investigated using X-ray diffraction and Raman spectroscopy. By substituting cations in with , the melting temperature was lowed and the ferroelectric properties can be improved. It is easier at lower temperature to fabricate the single crystal used for SAW filters and IR sensors. From the measured lattice constants and Raman band broadening, the solubility limit was X=0.25mol in , above which was obsered as a second phase. The Raman band of sintered was compared with that of the single crystal to see the effect of grain size on the band broadening.
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