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Ding J.-X.,Shandong University | Wang S.-L.,Shandong University | Mu X.-M.,No 52 Institute Of China North Industries Group | Yu G.-W.,Shandong University | And 3 more authors.
Wuji Cailiao Xuebao/Journal of Inorganic Materials | Year: 2010

The dependence of growth rate of (100) face of KDP crystal on supersaturation was measured using the laser polarization interference technique. Morphologies of both elementary steps and macrosteps were investigated by using AFM technique at a serial of supersaturation. Furthermore, the bunching process as well as the influence of supersaturation on bunching process was analyzed according to the AFM results. The results show that at the supersaturation of 1.8%, elementary steps are in priority on (100) face, whose height is 0.366 nm, equivalent to half of the unit cell. When the supersaturation is increased, elementary steps begin bunching together. At the initial bunching stage, the step height and step width are increased. With a rise of supersaturation, more elementary steps participate in the bunching process, and the velocity of the macrosteps increasease as well. At the same time, the slops of the macrosteps reach stable ultimately.


Ding J.-X.,Shandong University | Liu B.,Shandong Academy of Sciences | Wang S.-L.,Shandong University | Mu X.-M.,No 52 Institute Of China North Industries Group | And 7 more authors.
Wuji Cailiao Xuebao/Journal of Inorganic Materials | Year: 2011

KDP crystals were grown by rapid growth method in the presence of different concentrations of Cr3+. Both the growth rate and dead zone influenced by Cr3+ was measured, and the Cr3+ element distribution, UV-Vis transmission spectra, distribution of scatter particles and laser induced damage threshold were characterized as well. The results reveal that Cr3+ is prone to be absorbed onto (100) face, which decreases the growth rate and extends the growth dead zone. Additionally, Cr3+ can induce growth macroscopic growth boundaries between prismatic and pyramidal growth sectors. The element analyses of Cr3+ suggest that Cr3+ is inclined to enter into prismatic sector, which leads to a decrease of transmittance in visible light and ultraviolet band, and brings three strong absorption peaks at 220 nm, 450 nm and 650 nm. The entrance of Cr3+ into crystal lattice can increase the number of scatter particles and decrease laser induced damage threshold. The laser damage threshold at fundamental frequency and the third harmonic generation decrease with the increase of Cr3+ concentration. The damage threshold of KDP prismatic sector is lower than that of pyramidal sector.


Ding J.-X.,Shandong University | Zhang J.-Q.,No 53 Institute Of China North Industries Group | Wang S.-L.,Shandong University | Mu X.-M.,No 52 Institute Of China North Industries Group | And 5 more authors.
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2010

A series of KDP crystals were grown by traditional and rapid growth methods, doped with SO42-, NO3- and Cl- anions, which were commonly in existence during crystal growth process. The influence of different ion-doped on electrical conductivity of KDP crystals along X and Z directions were investigated. Experimental results implied that the electrical conductivity of KDP crystals grown by rapid method was higher than that by traditional method without any doping, and along X direction, the electrical conductivity is higher than along Z direction as well. Additionally, along X and Z directions, the electrical conductivity increased as the SO42- doping content increasing, while NO3- and Cl- had little contribution to electrical conductivity. Taking the structural similarity of SO42- and PO43- into account, SO42- could enter KDP crystal lattice and replace PO43-, which resulte in H+ vacancy. The directional migrations along both X and Z directions of H+ vacancy could enhance the electrical conductivity of KDP crystal. Owing to the structural dissimilarity of NO3- and Cl- to PO43-, it was difficult for NO3- and Cl- to replace PO43-, which resultes little contribution to electrical conductivity.


Liu W.-J.,Shandong University | Ding J.-X.,Shandong University | Mu X.-M.,No 52 Institute Of China North Industries Group | Liu G.-X.,Shandong University | And 4 more authors.
Gongneng Cailiao/Journal of Functional Materials | Year: 2013

A serials of K(H1-xDx)2PO4 crystals were grown by using traditional method from deuterated solutions. From the results of powder X-ray diffraction (XRD), it shows that the no changes occurred on symmetry of structure in K(H1-xDx)2PO4 crystals, while lattice parameter a increases with a increase of deuterium content of crystal. High resolution XRD was taken to characterize crystalline perfection. It was indicated that crystalline perfection was destroyed slightly by the replacement of partial H atoms by D atoms in KDP-DKDP mixed crystals.

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