Preparation method of rare earth fluoride in air

Abstract

The invention discloses a preparation method of rare earth fluoride in air, which comprises the following steps of dissolving rare earth element oxide by using acid and deionized water to form a rare earth salt solution; adding a precipitator into the rare earth salt solution and stirring to obtain a rare earth fluoride precipitate; adding deionized water into the precipitate and stirring to forma turbid liquid; and adding fluoride solution of M element in the turbid solution to obtain a liquid mixture. The method can not only realize uniform doping of rare earth ions without high-temperature sintering under an atmosphere of hydrogen fluoride, but also can avoid the problem of proportion mismatching of rare earth ions and other ions during the synthesis, has simple operation and good repeatability, can be used for synthesizing hundreds of sizes of rare earth fluorides and can carry out the batch production. The obtained product has uniform grain distribution, good dispersity and highstability, can be widely applied to the laser technology, fiber optical amplifiers, anti-counterfeiting materials, three primary color display materials, light conversion films of solar cells, and fluorescent marks for biological detection and analysis.

Description

technical field [0001] The invention relates to the technical field of rare earth material synthesis, in particular to a method for synthesizing rare earth fluorides of different sizes in air at 80-120°C. Background technique [0002] Due to its special 4f electronic structure, rare earth elements have optical, electrical, magnetic and thermal properties that many other elements do not have, so they can be made into many new materials that can be used in high-tech, known as the "treasure house" of new materials " and the "vitamins" of human industry. my country is rich in rare earth resources, and the research and preparation of rare earth compounds has important strategic scientific significance and application value for deepening the utilization of rare earth resources and expanding their new application fields. At present, the rare earth materials involved in the application include rare earth fluorine (chloride) compounds, rare earth oxides, rare earth composite oxides ...

AI Technical Summary

Problems solved by technology

However, the sol-gel method has disadvantages: the reaction takes a long time, the raw material is expensive, the sintering property between the gel particles is poor, and the product shrinks greatly when it is dried.

The hydrothermal method is a new method for the synthesis of ultrafine powder developed in recent years. The main difference between the hydrothermal method and other soft chemical methods such as sol-gel method and co-precipitation method is that the temperature is lower and the pressure is higher, and high pressure resistance is required. The equipment is used to complete the experiment, which is potentially dangerous and not easy for industrial mass production

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