Geoscience Reference
In-Depth Information
Figure 5.4 Hydrothermally
grown quartz crystals
[19]
.
Figure 5.5 Fabrication of
resonators from a single crystal
[18]
.
stringent are the requirements. For most applications, a truly high-quality material is
not needed. For high precision uses, such as in navigational devices and satellites, a
very high-quality material must be used. Most of the recent research on quartz growth
is for improved resonator performance; which requires the growth of high-quality and
low dislocation quartz, which is discussed in
Section 5.2.6
.
Figure 5.5
,showsthefab-
rication of resonators from a single crystal.
5.2 Growth of High-Quality (and Dislocation-Free)
Quartz Crystals
It is well known that the hydrothermal growth of quartz in the industrial sector is at
least 45 years old. Though many improvements have been brought about, it is still
more an art than a truly reproducible industrial and scientific process. We discussed
