Thermal conductivity garnets

The thermal conductivities of garnet crystals, as a group, have been extensively investigated. Studies were made on YIG (Luthi, 1962 Friedberg and... 

The theory of the effect of crystal structure on k is still in a very rudimentary state. It is generally observed that the larger the number of optical branches in the phonon spectrum, the lower the thermal conductivity. In garnets, there are 80 atoms in the primitive unit cells, and there are 97 optical modes at the zone center (Hurrell et al., 1%8). The combination of infrared and Raman studies has... 

Nitin PP, Klemens PG. Low thermal conductivity in garnets. Journal of the American Ceramic Society. 1977 80 1018-1020. 

Additional novel particles, including nylon 66, alumina, " gold, garnet, diamond, graphite, polyaniline, and boron nitride nanosheets, and nanoparticles of low molecular weight borate esters, have been introduced to increase ionic conductivities. Boron-doped PDMS has been used as scintillators for thermal neutron detection. Nanowires of ZnO have been inserted into PDMS to give tunable, flexible antireflection layers, and ZnO has also been introduced into such polymers as quantum dots. Similarly, color-tunable luminescent... 

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