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Precisely determine the congruent composition and lithium-rich phase boundary of lithium niobate (LiNbO3) using Curie temperature measurements.

September 1, 1985Journal of the American Ceramic Society

Congruent Composition and Li‐Rich Phase Boundary of LiNbO 3

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Precisely determine the congruent composition and lithium-rich phase boundary of lithium niobate (LiNbO3) using Curie temperature measurements.
Varied initial melt compositions between 47 and 49 mol% Li2O by adjusting Li2CO3 and Nb2O5 starting materials.
Measured Curie temperatures of quenched melts and crystal sections using high-temperature differential thermal analysis (DTA) with a precision of ±2°C.
Evaluated the lithium-rich phase boundary above 1000°C by quantifying weight gain following complete lithiation of congruently grown crystals.
Curie temperature varied with melt composition (C, in mol% Li2O) following the empirical relationship Te = 9095.2 − 369.05C + 4.228C².
Established that the congruent composition of LiNbO3 contains 48.45 mol% Li2O with a Curie temperature of 1138° ± 2°C.
Identified that the Li-rich phase boundary above 1000°C curves slightly toward lower Li2O concentrations as temperature increases.

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Implication

Experimental study reveals the congruent composition and Curie temperature relationship in lithium niobate, establishing precise phase boundaries for crystal growth.

Cite This Study

O’Bryan et al. (1985) studied this question.

synapsesocial.com/papers/6a8d1d0ca4bc1cf4cf7aa609 https://doi.org/10.1111/j.1151-2916.1985.tb15816.x

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Implication

Experimental study reveals the congruent composition and Curie temperature relationship in lithium niobate, establishing precise phase boundaries for crystal growth.

Congruent Composition and Li‐Rich Phase Boundary of LiNbO 3

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Implication

Cite This Study

Congruent Composition and Li‐Rich Phase Boundary of LiNbO 3

Key Points

Discussion

Implication

Cite This Study

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