Method for preparing sodium hydrogen zirconium phosphate powder

Abstract

The invention discloses a method for preparing sodium hydrogen zirconium phosphate NaZr2(PO4)3 powder. The method is characterized by comprising the following steps: preparing 0.06mol / l zirconium oxychloride solution, adding sodium polyphosphate in the solution according to the mass ratio of zirconium oxychloride solution to sodium polyphosphate of 2:5-4:5, preparing aqueous solution according to a process formula, adding in a high-pressure reactor with compactedness of 60%-80%, heating to 140-200 DEG C while stirring, keeping heat balance at the temperature for 5 hours, cooling to room temperature after reaction is finished, and filtering and washing reactants and finally drying at low temperature. The preparation method has simple process, the synthesized NaZr2(PO4)3 powder has high purity, and uniform powder granularity and is shaped into a spherical clew. The obtained NaZr2(PO4)3 powder can be applied to the field of the preparation of novel antibacterial materials, low-expansion ceramic materials, fast ion conductors, loaded noble metal catalyst materials and the like.

Description

technical field [0001] The present invention relates to phosphorus and its compounds, especially to the preparation of phosphorus halides or oxyhalides. Background technique [0002] As we all know, in the early days of the phosphate industry, people used the solid state reaction method to prepare sodium zirconium phosphate powder materials. Later, in the early 1990s, more mild synthesis methods such as sol-gel method and hydrothermal method appeared one after another. Since then, hydrothermal synthesis has become the first choice for the synthesis of such materials. When the sodium zirconium phosphate powder material is prepared by the hydrothermal method, the raw materials used are basically zirconium salt, phosphoric acid and sodium salt. By adding mineralizers and controlling the hydrothermal temperature, the sodium zirconium phosphate powder material is hydrothermally synthesized at a lower temperature. . However, according to the relevant reports that can be found a...

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Problems solved by technology

However, according to the relevant reports that can be found at present, the problems of these methods are that the consumption of phosphoric acid is large and the time used for preparation is relatively long.

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