A kind of Gd2O2S powder and its preparation method and application

By using the exhaust gas generated by calcination of high-sulfur petroleum coke as a sulfur source, combined with homogeneous precipitation method and vulcanization reaction, a high-purity and controllable morphology Gd2O2S powder was prepared, which solved the problems of poor safety, high cost and environmental pollution in the prior art, and achieved low cost and environmentally friendly preparation effect.

CN116143159BActive Publication Date: 2025-03-21LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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Patent Information

Application Number
CN202310040608.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-01-13
Publication Date
2025-03-21
Estimated Expiration
2043-01-13

AI Technical Summary

Technical Problem

The existing synthesis methods of Gd2O2S powders have problems such as poor safety, high cost, and environmental pollution, and it is difficult to control the morphology and size of the powders.

Method used

The exhaust gas generated by calcination of high sulfur petroleum coke was used as the sulfur source, and Gd2O3 powder was synthesized by homogeneous precipitation method, and the vulcanization reaction was carried out under an argon or nitrogen atmosphere to prepare a high-purity and controllable morphology.

Benefits of technology

The problems of high toxicity, poor safety and high cost of traditional vulcanizing agents have been overcome, pollution to the atmospheric environment has been reduced, and the cost-effective and environmentally friendly preparation of Gd2O2S powder is achieved. The obtained powder has high purity and good morphological characteristics.

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Abstract

The invention discloses a method for preparing Gd2O2S powder by using a high-sulfur coke vulcanization method, and belongs to the field of inorganic powder preparation. The invention uses Gd(NO3)3·6H2O and urea as raw materials, and calcines to obtain Gd2O3 powder. Under the protection of inert gas, high-sulfur petroleum coke (mass fraction of sulfur ≥3.0%) is used as a vulcanizing agent, and the waste gas generated by calcining the high-sulfur petroleum coke is directly used as a sulfur source to prepare high-purity single-phase Gd2O2S powder. The samples prepared in this way are spherical and nearly spherical, and have a small particle size, with an average diameter between 50 and 100 nm. The method for preparing Gd2O2S powder has the advantages of simple equipment (only one vacuum box resistance furnace is required), simple process, low energy consumption, mild preparation conditions, low cost, and environmental friendliness. The method well solves the problem of atmospheric pollution caused by high-temperature exhaust gas emitted during the calcination of high-sulfur petroleum coke, and conforms to the production concept of green synthesis. The Gd2O2S powder can be used in X-CT, X-ray intensifying screens, positron emission tomography (PET), high energy physics and industrial detection.
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