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Holmium-ytterbium-doped lithium potassium niobate monocrystal and preparation method thereof

A technology of potassium lithium niobate single crystal, applied in the field of potassium lithium niobate single crystal and its preparation

Inactive Publication Date: 2013-02-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current research on potassium lithium niobate crystals or doped potassium lithium niobate crystals (such as double-doped cerium manganese potassium lithium niobate crystals) is carried out around the nonlinear optics and ferroelectric effects of the crystals. At present, There are no reports of materials with frequency upconversion performance based on potassium lithium niobate

Method used

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  • Holmium-ytterbium-doped lithium potassium niobate monocrystal and preparation method thereof
  • Holmium-ytterbium-doped lithium potassium niobate monocrystal and preparation method thereof
  • Holmium-ytterbium-doped lithium potassium niobate monocrystal and preparation method thereof

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specific Embodiment approach 1

[0010] Embodiment 1: The holmium-ytterbium double doped potassium niobate lithium single crystal of this embodiment is made of ytterbium oxide, holmium oxide, niobium oxide, lithium carbonate and potassium carbonate, wherein the molar ratio of ytterbium oxide to holmium oxide is 1 : 0.5 to 8, the molar ratio of ytterbium oxide to niobium oxide is 1: 1263 to 1428, the molar ratio of ytterbium oxide to lithium carbonate is 1: 571 to 637, and the molar ratio of ytterbium oxide to potassium carbonate is 1: 857 to 957.

[0011] This embodiment successfully produces a holmium-ytterbium double-doped potassium lithium niobate single crystal that is transparent, uniform in quality, free of growth streaks, and superior in performance by adopting a gradual cooling method. The ultraviolet absorption edge of the crystal is around 380nm, which makes the typical absorption band of holmium in the ultraviolet region less than 380nm impossible to observe, while in its ultraviolet-visible-near-in...

specific Embodiment approach 2

[0012] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the molar ratio of ytterbium oxide to holmium oxide is 1:1 to 7, the molar ratio of ytterbium oxide to niobium oxide is 1:1270 to 1400, and the molar ratio of ytterbium oxide to niobium oxide is 1:1270 to 1400. The molar ratio of lithium carbonate is 1:580-625, and the molar ratio of ytterbium oxide to potassium carbonate is 1:865-950. Others are the same as the first embodiment.

specific Embodiment approach 3

[0013] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the molar ratio of ytterbium oxide to holmium oxide is 1:5, the molar ratio of ytterbium oxide to niobium oxide is 1:914, and the molar ratio of ytterbium oxide to lithium carbonate is 1:914. The ratio was 1:611, and the molar ratio of ytterbium oxide to potassium carbonate was 1:1331. Others are the same as the first embodiment.

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Abstract

The invention relates to a lithium potassium niobate monocrystal and a preparation method thereof, particularly a holmium-ytterbium-doped lithium potassium niobate monocrystal and a preparation method thereof. The invention aims to solve the technical problem that no lithium-potassium-niobate-based material with frequency upconversion performance exists at present. The holmium-ytterbium-doped lithium potassium niobate monocrystal is prepared from ytterbium oxide, holmium oxide, niobium oxide, lithium carbonate and potassium carbonate. The method comprises the following steps: weighing ytterbium oxide, holmium oxide, niobium oxide, lithium carbonate and potassium carbonate, evenly mixing, grinding, putting the mixture in a crucible, sintering in a crystal-growing furnace to obtain lithium potassium niobate polycrystal, and carrying out a gradual cooling method to obtain the holmium-ytterbium-doped lithium potassium niobate monocrystal. The monocrystal provided by the invention can emit 545nm green light and 650nm red light under the excitation of a 975nm laser, and can be used in the field of frequency upconversion short-wavelength full-solid laser devices, solar batteries, color display, biological identification and the like.

Description

technical field [0001] The invention relates to a potassium lithium niobate single crystal and a preparation method thereof. Background technique [0002] Upconversion fluorescent materials have received widespread attention due to their ability to transfer pump energy from the near-infrared spectral region to the visible or ultraviolet spectral regions. Potassium Lithium Niobate (K 3-y Li 2-x+y Nb 5+x O 15+2x ) is a material with extremely high potential application value because of its excellent pyroelectric, ferroelectric, piezoelectric and nonlinear optical effects. However, the current research on potassium-lithium niobate crystals or doped potassium-lithium niobate crystals (such as double cerium-doped manganese potassium-lithium niobate crystals) revolves around the properties of the crystals in terms of nonlinear optics and ferroelectric effects. There are no reports of materials with frequency up-conversion properties based on potassium lithium niobate. SUMMA...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/30C30B11/00
Inventor 周忠祥李磊封雷宫德维
Owner HARBIN INST OF TECH
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