Reactions
Lanthanum oxide is used to develop ferroelectric materials, such as La-doped Bi4Ti3O12 (BLT). Lanthanum oxide is used in optical materials, often the optical glasses are doped with La2O3 to improve the glass' refractive index, chemical durability, and mechanical strength.
- 3 B2O3 + La2O3 → 2 La(BO2)3
When this 1:3 reaction is mixed into a glass composite, the high molecular weight of the lanthanum causes an increase of the homogeneous mixture of the melt which leads to a lower melting point. The addition of the La2O3 to the glass melt leads to a higher glass transition temperature from 658 °C to 679 °C. The addition also leads to a higher density, microhardness, and refractive index of the glass.
Read more about this topic: Lanthanum(III) Oxide
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