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| ZnO (Zincite) - Main Properties |
 The past years are marked with an upsurge of interest to single crystal zinc oxide (ZnO) and its application. Due to the unique combination of semiconductor, piezoelectric, optical and thermal characteristics ZnO crystals can find a broad spectrum of applications in science and technology (piezoelectric converters, optical waveguides, gas sensors, optoelectronic and acoustoelectronic gadgets, scintillators etc.). |
| Crystal Structure | Hexagonal syngony, space group P63mc, structural prototype - Wurtzite. | | Lattice parameters | a=3.249Å, c=5.205Å, c/a=1.602 | | Melting temperature | 1975 oC | | Transmission coefficient (for 2 mm thick sample) | for 400-600 μm - over 50%, maximal transmission 95% for 1200 μm. | | Specific heat | 0.125 kal/g | | Thermal conductivity | 0.006 kal/cm/K | | Hardness (by Mohs scale): | 4 | | Thermoelectric constant | 1200 mV/K at 573 K | | Purity | 99.99 % | | Content of admixtures in the crystal (in PPM): | Mg < 5, Si < 30, Cu < 30, Fe < 50, Al < 30, Ti < 10, Ca < 5, Ag< 2, ZnO - base | | Density | 5676 kg/ m3 | | Elasticity constant | c33=210.9 x 109 N/m2 | | Piezomodule | d33=10.6 x 10-12 m/V | | Piezoelectric constant | k33=0.408 | | Dielectric constant | ε33=11.0 |
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