Nanoparticles were prepared by microwave radiated low-temperature solid-state reaction using La2O3 and KBH4 as starting materials. The microstructure and molecular vibration of nanoparticles were characterized by XRD, Raman spectra, SEM and TEM. Samples with LaB6 nanoparticle-doped polyvinyl butyral blends were tested for their performance in reducing solar heat gain. The results showed that the structure of LaB6 synthesized by microwave radiated low-temperature solid-state reaction was consistent with LaB6 synthesized by other methods. The particles were sphere-like and the grain size was 20 to 60nm. Polyvinyl butyral sheet containing LaB6 nanoparticles could block near-infrared radiation and exhibited good transmittance in the visible light range. When the mass ratio of LaB6 and polyvinyl butyral was 0.05%, the transmittance was up to about 79% in the visible light range and only 46% in the near-infrared range.

Microstructure and Transmittance of Nano-LaB6 Synthesized by Microwave-Assisted Solid State Reaction. Su, Y.C., Zhang, P.F., Xiao, L.H., Chen, H.Y.: Journal of Central South University - Science and Technology, 2011, 42[10], 3015-9