Novel eco-friendly low cost and energy efficient synthesis of (Nd-Pr-Dy)₂Fe₁₄B magnetic powder from monazite concentrate.

ABSTRACT: Syntheses of Nd₂Fe₁₄B magnetic powder by conventional method is a complicated multi-step process, which produces harmful pollutants and consumes a huge amount of energy and resources. Herein we report a simple chemical route for the preparation of (Nd-Pr)₂Fe₁₄B magnetic powder using monazite concentrate as a precursor. Th, U, Sm, and La impurities were removed from monazite leachate by roasting, solvent extraction and leaching the concentrate. Purified leachate consisting of Nd and Pr Chlorides was added to the FeCl₃ solution, and the solution produced was co-precipitated with NaOH. RE and Fe hydroxide precipitates were converted to the oxides by annealing at 700 °C. Boric acid and CaH₂ were added in the RE and Fe oxides pro

SUBMITTER: Haider SK 

PROVIDER: S-EPMC8523539 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature