A method for preparing high-purity cerium aluminate by high-temperature buried carbon method

Abstract

The invention belongs to the field of material synthesis, and specifically relates to a method for preparing high-purity cerium aluminate by a high-temperature embedded carbon method, using cerium oxide, aluminum oxide and graphite powder as raw materials, through batching, crushing and mixing, material pressing and molding, and carbon embedding. Encapsulation, high-temperature reduction, sampling and preparation resulted in a high-purity cerium aluminate block, which can be used for large-scale preparation of cerium aluminate in a simple, safe and efficient manner.

Description

technical field [0001] The invention belongs to the field of material synthesis, and in particular relates to a method for preparing high-purity cerium aluminate by a high-temperature buried carbon method. Background technique [0002] Cerium aluminate (CeAlO 3 ) as fluorescent catalytic materials, special electrode materials and functional ceramics are widely used in various material fields. However, due to the unstable positive trivalent cerium in cerium aluminate, the synthesis is difficult, and the synthesized cerium aluminate cannot exist in the standard state stably for a long time. [0003] At present, the commonly used cerium aluminate synthesis methods mainly include wet reduction and gaseous reduction, among which wet reduction is mostly used to prepare cerium aluminate compounds. Wet reduction is to use citric acid aqueous solution, aluminum nitrate, cerium nitrate and resin for medium and low temperature preparation, and then place it below 1000°C for long-term...

AI Technical Summary

Problems solved by technology

The reaction raw materials are gradually reduced under a protective atmosphere using a reducing gas. However, the temperature in the reduction process is relatively high, and the utilization efficiency of the reducing gas is relatively low, and the reduction time is relatively long. Generally, the reduction temperature is lower. Above 1550°C, the reduction time is not less than 10 hours

And these reducing gases will also bring a greater threat to the safety of the preparation process, prone to gas leakage or even explosion

[0004] It can be seen that the current synthesis methods of cerium aluminate have certain disadvantages and are not suitable for large-scale industrial preparation processes.

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