1. Universidade Federal do Rio Grande do Norte
2. Centro de Tecnologia
3. DEMAT - Departamento de Engenharia de Materiais
4. CT - DEMAT - Artigos publicados em periódicos

Título:	Ceramic crucibles: a new alternative for melting of PbO–BiO1.5–GaO1.5 glasses
Autor(es):	Santos, Ieda Maria Garcia dos Moreira, Rafael Carlos Martins Souza, Antônio Gouveia de Lebullenger, Ronan Hernandes, Antônio Carlos Leite, Edson Roberto Paskocimas, Carlos Alberto Silva, Elson Longo da
Palavras-chave:	M140;G180
Data do documento:	10-Jul-2002
Editor:	Elsevier
Referência:	SANTOS, Iêda Maria Garcia dos; MOREIRA, Rafael Carlos Martins; SOUZA, Antônio Gouveia de; LEBULLENGER, Ronan; HERNANDES, Antônio Carlos; LEITE, Edson Roberto; PASKOCIMAS, Carlos Alberto; LONGO, Elson. Ceramic crucibles: a new alternative for melting of pbo⠳bio1.5⠳gao1.5 glasses. Journal of Non-Crystalline Solids, [S.L.], v. 319, n. 3, p. 304-310, maio 2003. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0022309302020550?via%3Dihub. Acesso em: 21 mar. 2021. http://dx.doi.org/10.1016/s0022-3093(02)02055-0.
Resumo:	PbO–Bi2O3–Ga2O3 glasses present interesting properties such as good transmission in the mid-infrared region, high magnetic Verdet constant and non-linear properties. The processing of these heavy-metal-oxide (HMO) glasses is limited by the high corrosive nature of the melt, even in relation to noble metal crucibles. In this work, three kinds of ceramic crucibles (alumina, tin oxide and zirconia) were tested for melting HMO glasses. The main physical properties of the prepared glasses, such as the characteristic temperatures, optical transmission were studied in function of the crucible nature, time/temperature melting parameters. The incorporation of crucible material in the glasses was determined by ICP and atomic absorption. Themaximumglass contamination fromthe crucible was 2.9, 1.6 and 3.6mol% forAl2O3, SnO2 and ZrO2 crucibles, respectively, whenmelting was done at 900 C/240min, for zirconia crucibles and at 1000 C/60 min, for the other two crucibles. The evolution of the physical properties was discussed as a function of contamination degree
URI:	https://repositorio.ufrn.br/handle/123456789/32305
ISSN:	0022-3093
Aparece nas coleções:	CT - DEMAT - Artigos publicados em periódicos

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