Melt viscosity of binary system Bi2O3–GeO2

Мешалкин, А. Б.; Каплун, А. Б.

doi:10.1016/j.jcrysgro.2004.11.067

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…Regarding material where bismuth is largely in excess, Berthier (1834) also registered enhanced silver loss and suggested that it mainly occurs by impregnation, as, according to him, bismuth oxide is more fluid than lead oxide and carries away more silver within the pores of the cupel. However, modern data rule out Berthier's hypothesis, since, at 1000 C, the viscosity of PbO is 0.003 Pa s (Oliver, 1965) while the viscosity of Bi 2 O 3 is 0.01 Pa s (Meshalkin and Kaplun, 2005).…”

Section: Behaviour Of Bi and Influence Of Bi Contentmentioning

confidence: 95%

Bismuth behaviour during ancient processes of silver–lead production

L'Héritier

Baron

Cassayre

et al. 2015

Journal of Archaeological Science

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International audienceBismuth is one of the main trace elements found in archaeological lead and silver material in very variable contents. As silver refining by cupellation involves the redistribution of some trace elements contained in the initial lead bullion into the litharge and silver phases, an interdisciplinary approach has been carried out to understand the behaviour of bismuth during this process. Twenty-eight fire-assays were processed with seven different Pb–Bi–Ag alloys of various Bi content. A chemical characterization of all products was carried out. Parallel to the experiments, a thermodynamic approach was undertaken. The combination of experiments and modelling shows that the Bi/Pb ratio can be used as a tracer in silver material throughout the whole cupellation process. Bi and Ag contents in metallic lead might as well highlight the metallurgical process used to obtain lead. High Bi contents in silver–lead bullions are shown to notably reduce the silver extraction yield

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Section: Behaviour Of Bi and Influence Of Bi Contentmentioning

confidence: 95%

Bismuth behaviour during ancient processes of silver–lead production

L'Héritier

Baron

Cassayre

et al. 2015

Journal of Archaeological Science

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“…The possible reason is due to the over-high annealing temperature (usually > 900 C) when preparing "REBaB 9 O 16 " powder, which is higher than the melting points of BaB 4 O 7 (865 C) and Ba 2 B 10 O 17 (892 C) [22,23]. When applying the composition of RE: Ba: B ¼ 1: 1: 9, the final annealing at an overhigh temperature would lead to a mixture of Ba 6 RE 9 B 79 O 138 and amorphous Ba 2 B 10 O 17 , where the amorphous phase cannot be easily detected by XRD, therefore the RE: Ba: B ¼ 1: 1: 9 composition sometimes gave a plausible phase-pure phenomenon.…”

Section: Phase Purity Analysismentioning

confidence: 99%

Symmetry dependent evolution of the Tb 3+ photoluminescence in Ba 6 ( RE 1−x Tb x ) 9 B 79 O 138 ( RE = La and Y, 0 ≤ x ≤ 1) and Ce 3+ -to-Tb 3+ sensitization effect: A re-visit to RE BaB 9 O 16

Cong

Gao

et al. 2016

Journal of Alloys and Compounds

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“…Of these oxide systems, a BaO-B 2 O 3 binary composition can availably decrease the sintering temperature of ceramic materials as a flux agent due to its low-melting characteristics. As well known from the phase diagram of the binary system BaO-B 2 O 3 [5,6], the onset of a liquid phase in the binary system BaO-B 2 O 3 can be observed at least 869 o C, whereas a low-temperature liquid phase zone corresponding to the temperature range of 869 to 910 o C is located at the BaO-B 2 O 3 composition with a 50-70mol.% B 2 O 3 content, consequently which can supply a liquid-phase sintering aid for the low-temperature preparation of the composite ceramics as a matrix. Especially in order to achieve a densification sintering, the introduction of the α-alumina ceramic particles to the barium borate glassy matrix can offer more possibilities to set a proper sintering behavior and maximize mechanical strength [7][8][9].…”

Section: Introductionmentioning

confidence: 95%

Low-Temperature Preparation of the BaO-B<sub>2</sub>O<sub>3</sub> Matrix Composite Ceramics

Chen

Zhu

2013

AMR

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In this work, the energy-saving LTCC composite ceramics containing quartz, fused quartz and zirconia ceramic particles, respectively based on the binary system BaO-B2O3 were prepared by traditional solid-state preparation process at a sintering temperature of 900°C. Sintering mechanism and physical properties of the LTCC composite ceramics are investigated and discussed in detail in terms of their mineral phase composition. The results indicate that the introduction of α-alumina to the binary system BaO-B2O3 can improve the sintering behavior whereas the presence of the functional ceramic particles in the composite ceramics is important to achieve the peculiar physical characterlistics, which consequently supply more possibilities to regulate on the physical properties of the composite ceramics.

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Melt viscosity of binary system Bi2O3–GeO2

Cited by 4 publications

References 4 publications

Bismuth behaviour during ancient processes of silver–lead production

Bismuth behaviour during ancient processes of silver–lead production

Symmetry dependent evolution of the Tb 3+ photoluminescence in Ba 6 ( RE 1−x Tb x ) 9 B 79 O 138 ( RE = La and Y, 0 ≤ x ≤ 1) and Ce 3+ -to-Tb 3+ sensitization effect: A re-visit to RE BaB 9 O 16

Low-Temperature Preparation of the BaO-B<sub>2</sub>O<sub>3</sub> Matrix Composite Ceramics

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