Proposal of an analytical method for Nd, Pr, Fe and B determination in super-magnet alloys by ICP OES
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2022
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REUNIAO ANUAL DA SBQ, 45.
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Present in motors, electric turbines and data storage devices (hard disk), magnets are indispensable in
the manufacture of computers, televisions, cell phones, smart watches and several modern electronic
devices. The chemical composition of the magnet directly influences its magnetic performance and
consequently impacts the performance of the products with which it is associated. In this context, the
knowledge of the majority chemical composition of these materials contributes to an efficient quality
control in the act of production and helps the producers of the high-technology industry to select the
magnets in order to maintain a uniformity of these materials. Although there are several types of magnets,
those that use rare earth elements generally have strong magnetic activity, and are often called super-magnets.
Among the rare earth elements, the mixture of neodymium and praseodymium (didymium) is
widely used in metal alloys together with the elements iron and boron for its performance as a supermagnet.
The (Nd,Pr)FeB alloy production consists, in summary, to obtain metallic didymium by electrolytic
reduction of didymium oxide (mixture of neodymium and praseodymium oxides) followed by iron and
boron elements incorporation. The chemical composition control is important to avoid undesirable phases,
such alpha-iron, and to control the microstructure formation during the alloy manufacturing step. The
chemical composition range must be optimized such that minimizes the use of rare earth elements (Nd
and Pr). In this context, this work evaluated the best instrumental conditions for the determination of alloy
elements by ICP OES. Interference studies were carried out and the developed method was validated
through interlaboratory tests and addition and recovery tests.
Como referenciar
PAPAI, RODRIGO; ALMEIDA, GILMAR A.; SILVEIRA, JOAO R.F.; SILVA, ANDRE L.N.; SANTOS, CELIA A.L.; NAGASIMA, THIAGO P.; JABES, EDUARDO G.; LANDGRAF, FERNANDO J.; LUZ, MACIEL S. Proposal of an analytical method for Nd, Pr, Fe and B determination in super-magnet alloys by ICP OES. In: SILVA, FERNANDO de C. da (org.). In: REUNIAO ANUAL DA SBQ, 45., 31 de maio - 3 de junho, 2022, Maceió, AL. Resumo... São Carlos, SP: Aptor Software, 2022. p. 132-132. Disponível em: http://repositorio.ipen.br/handle/123456789/33965. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.