KDP 結晶の育成について

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For a long time, We had studied the growth of a water soluble piezoelectric crystal such as Rochelle salt, new mixed crystal (C_4H_2O_6Mg Na K), EDT (ethylene diamine tartrate), and DKT (dikalium tartrate). Recently, KDP (kalium dihydrogen phosphate) crystal is used for the modulator of Laser or the photoelectric high speed shutter by Kerr effect of the crystal. In these case, it may be necessary large so much as get up the purpose. We have studied for the properties of KDP solution, and then the growth of single crystals. We have learned that the PH of KDP solution is 4.0 and the solution of 5.5∿5.8 PH is the best to grow the crystal. It must grow to a or b axis of the crystal at the same rate, because of the construction of KDP crystal, but in the experimental results, it grew to different dimension by the convection of solution in the mother liquid, with the growing ratio is 2 : 1 for the vertical face to horizontal face of crystal in which the seed is situated on bottom plate, on the other hand, with the ratio is 1.3 : 1 for the same faces of crystal in which the seed is suspended in bath by the niron thread. We considered the reason on which it is due to the convection effect of liquid with situation of the seed. Through the experiments, we did know that the growing rate of KDP crystal is so much slow than the Rochelle salt, new mixed crystal etc. It is said that a KDP crystal growth is difficult as much as DKT crystal.
山梨大学の論文
1964-03-20

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古屋直臣
山梨大学工学部

KDP 結晶の育成について

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