In order to adapt to market demand, the large particle lanthanum oxide industry has developed rapidly

Lanthanum oxide is the most widely used rare earth product among rare earth oxides. Its applications in precision optical glass, fluorescent materials, rare earth alloys, catalysts, solid electrolyte batteries, ceramic capacitors, gas sensors, cathode materials and electrical contacts are constantly developing. In recent years, lanthanum oxide has been studied as an additive in the wear performance of automobile friction pads, ceramic material properties, new energy materials, electrocatalysis, etc. China’s lanthanum reserves are approximately 21 million tons, with good development and application prospects.

Since the particle size and morphology of rare earth oxide powders have an important impact on product performance and effects, with the continuous development of new rare earth materials, industrial production has increasingly required physical properties such as particle size and morphology of rare earth oxides. It’s getting stricter. In recent years, the market’s demand for products with controllable particle sizes has increased significantly. In many rare earth product application fields, there are very strict requirements for the particle size distribution of rare earth oxide powders. Rare earth oxides with larger particle size and better morphology uniformity have greater market potential.

According to the released “Global Large Particle Lanthanum Oxide Industry In-depth Market Research and Key Area Research Report 2022-2026” shows that in recent years The research on lanthanum oxide mainly focuses on the micron level, while there is very little research on large-particle lanthanum oxide, especially there are few literature reports on particle sizes greater than 20 μm. Existing research currently focuses on the preparation of large particles of cerium, neodymium, and gadolinium oxides. The preparation method is mainly a precipitation method. Generally, the corresponding rare earth salt solution is used as the raw material, and oxalic acid or ammonium bicarbonate is used as the precipitant. For large particles, There are few studies on the preparation of granular lanthanum oxide.

At present, the main method for preparing large particles of lanthanum oxide is oxalic acid precipitation, and there are also ammonium bicarbonate precipitation and spray drying. The precipitation method has a simple process, is easy to operate, and is widely used in liquid-phase chemical synthesis of high-purity particles. In addition, oxalic acid rare earth has the advantages of good precipitate crystal form and easy filtration. Therefore, the oxalic acid precipitation method is the best way to prepare high-purity rare earth oxides. Main method. However, when ammonium bicarbonate precipitates rare earths, if it is not properly controlled, flocculent precipitation will be generated, which is not only large in size, but also difficult to filter. This limits the industrial application of the ammonium bicarbonate precipitation method to a certain extent. However, ammonium bicarbonate is a cheap Industrial precipitants can reduce raw material production costs. Therefore, preparing large-particle rare earth carbonate precursors by controlling reaction conditions is the key to popularizing this precipitation process.

Industrial analysts said that in general, large particle size lanthanum oxide is becoming more and more widely used in the preparation of new rare earth materials. Lanthanum oxide It is one of the important products in light rare earths. Fully exploring the application fields of large particle lanthanum oxide is one of the important ways to rationally apply China’s rare earth resources. It will promote the development of new rare earth material technology and industry and increase the added value of rare earth products. It is of great significance to improve the application level of China’s rare earth industry.