Suspension crucible for growth of lithium niobate crystal with near stoichiometric ratio and its growth process

A near-stoichiometric ratio and crystal growth technology, applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve the difficulty of batch growth of near-stoichiometric lithium niobate crystals, the reduction of lithium content in the melt, and the difficulty of crystal growth. Obtain stable and consistent composition and other issues, to achieve the effect of controlling and regulating, overcoming too low temperature in the growth zone, and good auxiliary heating effect
CN1654715AInactive Publication Date: 2005-08-17SHANDONG UNIV +1
0 Cites 12 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANDONG UNIV
Publication Date
2005-08-17
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
Patent Text Reader

Abstract

The present invention belongs to the field of crystal material technology, and includes mainly setting one support disc inside ceramic crucible, setting one refractory cylinder vertically on the disc, fixing one noble metal ring horizontally on the cylinder, hanging one noble metal cylinder on inner edge of the ring, and making the noble metal crucible rotate around the support shaft and move up and down and the heating winding move up and down with the crucible. During melting material, the noble metal crucible is separated from the noble metal cylinder; and during growing crystal, the noble metal cylinder separates the noble metal crucible into two regions, growth region and melt region. The present invention has the advantages of high material melting efficiency, homogeneous stirring, less volatilization of lithium oxide, easy regulation of temperature field, being favorable to stable crystal growth, etc.
Need to check novelty before this filing date? Find Prior Art

Description

(1) Technical field

[0001] The invention relates to a hanging crucible for growing near-stoichiometric lithium niobate crystals, belonging to the technical field of crystal materials. (2) Background technology

[0002] As we all know, as an important optoelectronic functional material, lithium niobate crystals are widely used in optical transmission, video and audio devices, frequency doubled lasers and optical storage and other fields.

[0003] Lithium niobate is generally grown by the Czochralski method, and lithium niobate crystals of the same composition are grown at the same composition point in the lithium oxide-niobium oxide binary phase diagram. Because lithium niobate crystals with the same composition are non-stoichiometric compounds, [lithium] / [niobium] is about 48.6 / 51.4, severe lithium deficiency, and a large number of intrinsic defects are formed in the crystal, which has many disadvantages to the performance of lithium niobate influence, which limits the appl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More