Download (4Mb) - Etheses - Saurashtra University

Chapter II Solution Growth….
high purity solvents and a good deal of designing and parameter settings for
good quality crystal growth [62].
2.13 Recent Work on KDP Crystals
KDP and its analogous systems such as Dueaterated KDP (DKDP)
and ADP crystals are one of the most widely studied crystals. These crystals
are studied for their different applications, but also for their morphologies,
habits, effect of various growth parameters, effect of impurities, etc. The
amount of literature reported for growth and characterization of these crystals
is enormous, notwithstanding, some important studies on growth, morphology
and habit modifications carried out over the period of more than a decade is
attempted to cover in this section.
One of the aims of the researchers all over the world is to grow high
quality KDP crystals rapidly. For this purpose various authors have made
various modifications in the growth techniques as well as designed the new
set ups. In 1987, a splicing technique was reported by Sui et al [63] to speed
up the enlargement of the cross- section of KDP crystals. An n 2 (n = 1, 2, 3,
4…) array of (001) oriented seed crystals were applied to grow KDP crystals
up to 72 cm 2 in cross-section. The authors reported the results of a research
program concerning the seed splicing technique to grow large KDP crystal.
They mounted several seed crystals together in a frame in such a manner that
the seeds had the same crystallographic orientation. This composite seed
was then placed into a super saturated solution. It would be possible, despite
the unavoidable mutual mis-orientation of the separate seed crystals in
reference to each other of about 1 Ǻ, to grow a single crystal of a large
86