Inorganic nonlinear optical material lead iodo-borate crystal, and preparation method and application thereof

A technology of nonlinear optics and lead iodoborate, which is applied in the fields of materials science and inorganic chemistry, and can solve problems such as no literature reports

Active Publication Date: 2011-09-21
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
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  • Inorganic nonlinear optical material lead iodo-borate crystal, and preparation method and application thereof
  • Inorganic nonlinear optical material lead iodo-borate crystal, and preparation method and application thereof
  • Inorganic nonlinear optical material lead iodo-borate crystal, and preparation method and application thereof

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Embodiment Construction

[0010] specific implementation plan

[0011] 1) Weigh in air, take 0.84mmol of lead oxide (0.187g), 0.12mmol of lead iodide (0.055g) and 1.08mmol of boron oxide (0.075g) and mix and grind them and place them in a quartz tube with one end sealed ;

[0012] 2) Connect the above sample loading quartz tube to the vacuum line to evacuate and seal the tube (vacuum degree < 10Pa);

[0013] 3) Heat the sealed quartz tube in a tubular resistance furnace, keep it at 750°C for 24 hours, and then cool it down to room temperature at a rate of 5°C / h. When the tube is opened, it can be seen that the tube wall is attached or the molten yellow glass body at the bottom is embedded with colorless or light yellow transparent columnar crystals, which are lead iodoborate crystals.

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Abstract

The invention relates to an inorganic nonlinear optical material lead iodo-borate crystal, and a preparation method and application thereof, belonging to the field of inorganic chemistry as well as the field of material science. The chemical formula of the lead iodo-borate crystal is Pb2B5O9I, and the molecular weight is 739.35; the lead iodo-borate crystal belongs to an orthorhombic crystal system and a space group Pnn2; and the unit cell parameters are as followings: alpha = 90 DEG, beta = 90 DEG, gamma = 90 DEG, and Z = 4. The lead iodo-borate crystal is synthesized by a one-step self fluxing method, which comprises the following steps: mixing lead raw materials consisting of oxide, lead iodide and boron oxide with self flux consisting of PbO and B2O3 which are 50-150% excess, wherein the molar ratio of of PbO:PbI:B2O3 is 3:1:5; adding the mixture to a vacuum sealed container; insulating heat at 700-900 DEG C for 5-48 hours; and slowly cooling to room temperature at the speed of lower than 10 DEG C/hour to obtain an end product lead iodo-borate crystal. The lead iodo-borate crystal has excellent nonlinear optical performance, and the second harmonic generation (SHG) coefficient of the crystal powder is 1.4 times that of KTP (kalium titanium phosphate).

Description

technical field [0001] The invention belongs to both the field of inorganic chemistry and the field of material science, and relates to the structure and preparation method of an inorganic nonlinear optical material crystal, and also relates to the application of the crystal in the high-tech field. Background technique [0002] Optics before the appearance of lasers basically studied the propagation of weak light beams in the medium, and its reflection, refraction, interference and diffraction all obeyed the principle of linear superposition of waves, which is called linear optical effect. However, under the action of strong laser light, the above phenomenon no longer satisfies the superposition principle of waves, and many new phenomena appear, such as the generation of harmonics, optical parametric oscillation, four-wave mixing and optical bistability, etc. These phenomena are nonlinear optics (non -linearoptical, abbreviated as NLO) effect. Nonlinear optical crystals hav...

Claims

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Application Information

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IPC IPC(8): C30B29/12C30B9/12
Inventor 陈玲黄一枝吴新涛吴立明
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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