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Preparation method of potassium dihydrogen phosphate twin crystal

A technology of potassium dihydrogen phosphate and twins, which is applied in the field of preparation of potassium dihydrogen phosphate twins, can solve the problem of not finding KDP crystals, etc., and achieve the effect of simple crystal bonding process

Inactive Publication Date: 2014-05-14
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no such method for KDP crystal binding

Method used

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  • Preparation method of potassium dihydrogen phosphate twin crystal
  • Preparation method of potassium dihydrogen phosphate twin crystal
  • Preparation method of potassium dihydrogen phosphate twin crystal

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Experimental program
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Embodiment Construction

[0022] Now in conjunction with accompanying drawing, the embodiment of the present invention is described in further detail as follows:

[0023] 1. Cultivate KDP single crystal: ① Use the purified KDP raw material according to the solubility formula to prepare a KDP saturated solution higher than room temperature at 5°C in a beaker and dissolve it in a beaker. After a little overheating, pour it into a medium-sized petri dish and cover it with a watch glass. Let it cool and crystallize at room temperature. After a certain period of time, pick out the larger and better-shaped "sprouts" and take them out with stainless steel tweezers and dry the surface with filter paper. In order to make the buds grow bigger, usually lift the watch glass A slit is used to control evaporation; ②The above-mentioned crystal buds are not large enough to be directly used in the KDP twin crystal growth experiment. Therefore, the crystal buds are used as seed crystals and continue to be cultiva...

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Abstract

The invention relates to a method for preparation of twin crystal by combination of potassium dihydrogen phosphate (KDP), mainly adopts a method of polishing crystal, carrying out heat treatment and combining two same size crystals through molecular diffusion, and belongs to the technical field of inorganic crystal material preparation process. The method comprises the following steps: cutting two cone vertexes of a KDP monocrystal with complete appearance, cutting the rest part into two sections; coarsely grinding according to a set angle direction; polishing residual part with fine sand paper to form a rectangular shape; polishing and performing joint butt to the two faces to be subjected to joint butt; putting the two treated crystals (with a certain pressure) in a furnace to perform proper heating; taking out the crystals after a proper period, combining the two crystals together, and leading two optical axes to be a certain angle; and preparing the dihydrogen phosphate twin crystal by adopting a KDP saturated solution cooling method.

Description

technical field [0001] The present invention relates to a method for combining two pieces of potassium dihydrogen phosphate (KDP) into twins, which is mainly a method of heat treatment after crystal polishing, and a method for combining two crystals of the same size through molecular diffusion, and combining The mask has good mechanical properties and belongs to the technical field of inorganic crystal material preparation technology. Background technique [0002] In recent years, the research on artificial media with "negative refractive index" has become an attractive frontier field, and has triggered many possible applications. Within a certain range of incident angles, the interface between the two crystals has the phenomenon of equivalent negative refraction and total transmission of light waves. Therefore, we can independently design the crystal structure, so that the crystal interface can realize the equivalent negative refraction phenomenon in all angles, an...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B7/08C30B29/14
Inventor 刘志坤王燕刘琦庞宛文白丽华张惠芳
Owner SHANGHAI UNIV