Effect of DTPA on Rapid Growth and Performance of KDP Crystal

doi:10.3724/SP.J.1077.2012.00405

Abstract

Abstract:

KDP crystals were grown by “point seed” rapid growth method in the presence of 1×10^-4 (mol/mol KDP) diethylene triamine penlaacetic acid (DTPA). Metastable zone width of the solutions with different saturation temperatures were extended by adding a small amount of DTPA. The influence of different concentrations of DTPA on the growth kinetics of (100) face of KDP crystal was studied by laser polarization interference technique. With the DTPA concentration increasing, the critical supersaturation (dead zone) was decreased continually, but the growth rate was firstly increased and then decreased, passing through a maximum. The UV-Vis transmission spectra and impurity content of main metal ions in the crystal were characterized as well. The results showed that the optical transmittance in the UV region was enhanced significantly and the impurity content of main metal ions in the crystal was reduced effectively by the addition of 1×10^-4 (mol/mol) DTPA.

Key words: KDP crystal, rapid growth, additive, growth kinetics, optical transmittance

CLC Number:

O781

ZHU Sheng-Jun, WANG Sheng-Lai, DING Jian-Xu, LIU Guang-Xia, SUN Yun, LIU Wen-Jie. Effect of DTPA on Rapid Growth and Performance of KDP Crystal[J]. Journal of Inorganic Materials, 2012, 27(4): 405-410.

Figures/Tables 6

Fig. 1 Metastability limit curves of pure and DTPA-added KDP solution

Fig. 2 (a) Critical supersaturation of (100) face and (b) dependence of growth rate of (100) face on supersaturation of KDP crystal with different concentrations of DTPA

Fig. 3 Photographs of the KDP crystals grown from (a) undoped solution (b) DTPA (1×10-4 mol/mol)-added solution

Fig. 4 Diagram showing the samples selected in crystal

Fig. 5 Transmission spectra of KDP crystals

Table 1 Element result of KDP crystals grown by rapid growth method

Sample number	Dopant concentration of DTPA/ (×10^-6, mol?mol^-1)	Result measured by ICP /(×10^-6, g·g^-1 KDP)
Sample number	Dopant concentration of DTPA/ (×10^-6, mol?mol^-1)	Fe	Cr	Al	Ca	Mg	Na
Raw material of KDP	0	3.160	0.281	2.489	5.891	0.647	14.499
Pyramidal sector	0	1.516	0.253	2.236	3.446	0.625	7.244
Prismatic sector	0	12.073	1.802	14.237	5.199	0.851	16.649
Pyramidal sector	100	0.725	0.140	1.192	2.998	0.490	5.534
Prismatic sector	100	4.219	0.423	6.913	4.557	0.639	7.929

References 24

[1]	De Yoreo J J, Burnham A K, Whitman P K. Developing KH2PO4 and KD2PO4 crystals for the world’s most power laser. International Materials Reviews, 2002, 47(3): 113-152.
[2]	王波, 房昌水, 王圣来, 等.KDP／DKDP晶体生长的研究进展. 人工晶体学报, 2007, 36(2): 247-252.
[3]	Zaiteseva N P, De Yoreo J J. Rapid growth of large-scale (40-55 cm) KH2PO4 Crystal. Journal of Crystal Growth, 1997, 180(2): 255-262.
[4]	Zhuang X X, Ye L W, Zheng G Z, et al. The rapid growth of large-scale KDP single crystal in brief procedure. Journal of Crystal Growth, 2011, 318(1): 700-702.
[5]	王波, 王圣来, 房昌水, 等. Fe3+对KDP晶体生长影响的研究. 人工晶体学报, 2005, 34(2): 205-208.
[6]	Land T A, Martin T L, Sergey Potapenko, et al. Recovery of surface from impurity poisoning during crystal growth. Nature, 1999, 393: 442-445.
[7]	Ding Jian-Xu, LIU Bing, Wang Sheng-Lai, et al. Effect of Cr3+ dopant on growth habit and optical properties of rapid grown KDP crystal. Journal of Inorganic Materials, 2011, 26(4): 354-358.
[8]	MU Xiao-Ming, WANG Sheng-Lai, FANG Chang-Shui, et al. Effect of Ca2+ ions on the growth habit and optical properties of KDP crystal. Journal of Inorganic Materials, 2007, 22(6): 1103-1107.
[9]	ZHANG Jian-Qin, WANG Sheng-Lai, FANG Chang-Shui, et al. Effects of anionic impurities on the light scatter in KDP crystal. Journal of Inorganic Materials, 2007, 22(2): 268-272.
[10]	FU You-Jun, GAO Zhang-Shou, LI Yi-Ping, et al. Effects of anions on the growth habit of KDP crystals. Journal of Inorganic Materials, 2000, 15(3): 409-415.
[11]	Li G H, Su G B, Zhuang X X, et al. Rapid growth of KDP crystal with new additive. Journal of Crystal Growth, 2004, 269(2/3/4): 443-447.
[12]	Kuznetsov V A, Okhrimenkoand T M, Miroslawa Rak. Growth promoting effect of organic impurities on growth kinetics of KAP and KDP crystals. Journal of Crystal Growth, 1998, 193(1/2): 164-173.
[13]	郑国宗, 张文彬, 苏根博, 等. 有机添加剂对KDP晶体生长及其光学性质的研究. 人工晶体学报, 2008, 37(3): 519-523.
[14]	Rajesh N P, Meera K, Srinivasan K, et al. Effect of EDTA on the metastable zone width of ADP. Journal of Crystal Growth, 2000, 213(3/4): 389-394.
[15]	Rajesh N P, Kannan V, Santhana P, et al. Optical and microhardness studies of KDP crystal growth from aqueous solution with organic additives. Material Letters, 2002, 52(4/5): 326-328.
[16]	LIU Bing, WANG Sheng-Lai, FANG Chang-Shui, et al. In situ measurement of the prismatic faces growth rate of KDP crystal. Journal of Inorganic Materials, 2006, 21(1): 22-28.
[17]	Rashkovich L N. KDP-family Single Crystals. Bristol, Adam Hiler, 1991: 19.
[18]	Masahiro Nakatsuka, Kana Fujioka, Tadashi Kanabe, et al. Rapid growth over 50mm/day of water-soluble KDP crystal. Journal of Crystal Growth, 1997, 171(3/4):531-537.
[19]	Zaiteseva N P, Carman L. Rapid growth of KDP-type crystals. Progress in Crystal Growth and Characterization of Materials, 2001, 43(1): 1-118.
[20]	Cabrera N, Vermilyea D A. Growth and perfection of crystals. Journal of the American Chemical Society, 1959, 81(13): 3489-3490.
[21]	Owczarek I, Sangwal K. Effect of impurities on the growth of KDP crystals:On the mechanism of adsorption on (100) faces from tapering date. Journal of Crystal Growth, 1990, 99(1-4): 827-831.
[22]	Rashkovicnh L N, Kronshgy N V. Influence of Fe3+ and Al3+ ions on the kinetics of steps on the (100) faces of KDP. Journal of Crystal Growth, 1997, 182(3/4): 434-441.
[23]	Zaiteseva N P, Smolsky I, Torres R, et al. The effect of impurities and supersaturation on the rapia growth of KDP crystals. Journal of Crystal Growth, 1999, 204(4): 512-524.
[24]	DeVries S A, Goedtkindt P, Huisman W J, et al. X-ray diffraction studies of potassium dihydrogen phosphate (KDP) crystal sufaces. Journal of Crystal Growth, 1999, 205(1/2): 202-214.