Abstract
For some applications, ceramic materials must be prepared as single crystals. When used as substrates for thin-film growth [e.g., silicon-on-sapphire (SOS) technology or the growth of superconductor thin films], it is the crystalline perfection of a single crystal that is the important requirement. In optical applications [e.g., the use of ruby and yttrium aluminum garnet (YAG) for laser hosts and quartz and sapphire for optical windows], single crystals are used to minimize scattering or absorption of energy. In piezoelectric materials (e.g., quartz), the optimum properties are obtained in single-domain single crystals. Table 29.1 lists some of the applications that utilize the desirable optical, electrical, magnetic, or mechanical properties of ceramic single crystals.
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