LBO(lithium boric oxide) crystal polishing method based on crystal oxidant

An oxidant and crystal technology, applied in polishing compositions containing abrasives, chemical instruments and methods, crystal growth, etc., can solve the problem of high processing cost, and achieve the effect of improving surface quality, reducing surface roughness and high surface quality
CN106826408AInactive Publication Date: 2017-06-13TONGJI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TONGJI UNIV
Publication Date
2017-06-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for polishing LBO(lithium boric oxide) crystal based on crystal oxidant. The method for polishing LBO crystal comprises the following steps: corundum powder with particle size smaller than W10 is used as grinding material to grind LBO crystal; coarse polishing of LBO crystal is carried out by using cerium oxide polishing solution with particle size no more than 1 m; the alkaline colloid polishing solution with particle size of 50nm-100nm is used for polishing; the LBO crystal surface is immersed in organic solvent and treated with ultrasonic cleaning machine of ultrasonic etching treatment; the LBO crystal is re-polished on the asphalt plate by using anhydrous ethanol and ether mixture. Compared with the prior art, the method for polishing LBO crystal has the advantages that in the process of polishing, the crystal oxidant is added, and the LBO crystal can be polished more quickly and efficiently; besides, the design fixture can be applied to the low cost dual shafts lapping machine, which is suitable for laboratory and mass processing; the method for polishing LBO crystal is of simple operation and strong reliability, and is suitable for grinding and polishing various kinds of similar crystals, and the process flow is short in time and convenient for popularization.
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Description

technical field

[0001] The invention relates to the technical field of LBO crystal processing, in particular to an LBO crystal polishing method based on a crystal oxidant, capable of preparing LBO crystals with very low subsurface damage and ultra-smooth surfaces. Background technique

[0002] Lithium triborate (LiB 3 o 5 Abbreviated as LBO) is a combined frequency crystal successfully developed by the Institute of the Structure of Matter, Chinese Academy of Sciences. The density is 4.47g / cm 3 , the melting point is 834°C, it belongs to orthorhombic crystal, the light transmittance band is 160nm-2600nm, the effective nonlinear coefficient is equivalent to 3 times of KDP, it is a very good nonlinear optical material. This kind of crystal has good optical uniformity, less inner envelope, and the main defects are dislocations, inclusions and scalloped regions. The laser damage threshold is high, the dispersion is small, and it has a wide acceptance angle. Spectral non-crit...

Claims

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