Optimization of the process of obtaining RE 2 O 3 from xenotime using statistical design (2018)
- Authors:
- Autor USP: RIBEIRO, SEBASTIAO - EEL
- Unidade: EEL
- DOI: 10.1590/0366-69132018643692180
- Assunto: PRECIPITAÇÃO
- Keywords: planejamento estatístico; fusão alcalina; xenotime; alkaline fusion; acid leaching; precipitation; statistical design; xenotima
- Agências de fomento:
- Language: Inglês
- Abstract: The study of the production of the mixed rare earth oxide (RE2 O3 ) from xenotime via hydrometallurgy was performed to evaluate the significance of the effects of three factors including the melting temperature (A), the ratio of NaOH/xenotime (B), and time (C) for the first stage of alkaline fusion by using full 2³ factorial design. Also, seven factors were studied including liquid/solid ratio (LS), inert (I1 ), excess HNO3 (EA), temperature (TL), inert (I2 ), time (HL), and inert (I3 ) for the second and third steps, which were the oxalic acid leaching and precipitation, using Plackett-Burman design (PBD). Optimizing factors for significance were performed using plots of interactions, analysis of variance (ANOVA), Pareto charts, surface charts, analysis of Student’s t-test and F test. A regression model was suggested and satisfactorily adjusted for the experimental data of the process of alkaline fusion, revealing an elevated coefficient of determination (R2 =0.92) to a Fcalculated value well above the Ftabulated value, at a 95% confidence level. The RE2 O3 was characterized by chemical analysis, X-ray diffraction, scanning electron microscopy, and specific surface area. This process resulted in a material with identical physical and chemical properties to the isolated compounds of rare earths and can be used as an alternative sintering additive in advanced ceramics, and indicated that the cost of final production of RE2 O3 can be lower compared to commercial Y2 O3 .
- Imprenta:
- Publisher: ABCeram
- Publisher place: São Paulo-SP
- Date published: 2018
- Source:
- Este periódico é de acesso aberto
- Este artigo é de acesso aberto
- URL de acesso aberto
- Cor do Acesso Aberto: gold
- Licença: cc-by
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ABNT
GOMES, Y. F. et al. Optimization of the process of obtaining RE 2 O 3 from xenotime using statistical design. Cerâmica, v. 64, p. 79-85, 2018Tradução . . Disponível em: https://doi.org/10.1590/0366-69132018643692180. Acesso em: 10 out. 2025. -
APA
Gomes, Y. F., Ribeiro, S., Costa, M. C. B., & Motta, F. V. (2018). Optimization of the process of obtaining RE 2 O 3 from xenotime using statistical design. Cerâmica, 64, 79-85. doi:10.1590/0366-69132018643692180 -
NLM
Gomes YF, Ribeiro S, Costa MCB, Motta FV. Optimization of the process of obtaining RE 2 O 3 from xenotime using statistical design [Internet]. Cerâmica. 2018 ; 64 79-85.[citado 2025 out. 10 ] Available from: https://doi.org/10.1590/0366-69132018643692180 -
Vancouver
Gomes YF, Ribeiro S, Costa MCB, Motta FV. Optimization of the process of obtaining RE 2 O 3 from xenotime using statistical design [Internet]. Cerâmica. 2018 ; 64 79-85.[citado 2025 out. 10 ] Available from: https://doi.org/10.1590/0366-69132018643692180 - PROPRIEDADES ÓPTICAS E MECÂNICAS DE ZrO2 ESTABILIZADA COM DIFERENTES TEORES DE Y2O3
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Informações sobre o DOI: 10.1590/0366-69132018643692180 (Fonte: oaDOI API)
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