ChemInform Abstract: PHASE RELATIONS IN THE SYSTEM LEAD OXIDE‐LEAD SILICATE (PBO‐PBSIO3)

Hirota, K.; Hasegawa, Yasutoshi

doi:10.1002/chin.198126017

Cited by 1 publication

(7 citation statements)

References 1 publication

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“…The following phases were identified: quartz, tridymite, cristobalite, lead silicates (PbSiO 3 , Pb 7 Si 6 O 19 , Pb 3 Si 2 O 7 , Pb 2 SiO 4 , Pb 11 Si 3 O 17 , Pb 5 SiO 7 ) and lead oxide (PbO, massicot). No other phases (including Pb 4 SiO 6 ) have been found in this temperature range, which is in agreement with the results by Hirota. None of the solid phases showed any ranges of solid solutions.…”

Section: Discussionsupporting

confidence: 92%

“…Phase diagram of the PbO–SiO 2 system with present experimental results, compared with model predictions by Pelton and Jak, and the experimental data from Geller, 1934; Krakau 1949; Charette, 1968; Billhardt, 1969; Calvert, 1970; Smart, 1974; Kuxmann, 1977; Hirota, 1981; Taskinen, 1982; Jak, 1994. (A) complete diagram; (B, C) details of low‐temperature regions at 0‐35 and 30‐70 mol% SiO 2 [Color figure can be viewed at wileyonlinelibrary.com]…”

Section: Resultsmentioning

confidence: 66%

“…The points on the PbO liquidus from this study agree with within experimental uncertainty. Extrapolation of the PbO liquidus was used to suggest that Pb 11 Si 3 O 17 and Pb 5 SiO 7 melt incongruently, at ~727°C (22 mol% SiO 2 in slag), and ~733°C (21 mol% SiO 2 in slag), respectively; this differs from the eutectic reaction Liquid → Pb 11 Si 3 O 17 + Pb 5 SiO 7 and low liquidus temperatures at 18‐20 mol% SiO 2 reported by Hirota.…”

Section: Resultsmentioning

confidence: 86%

“…Billhardt and Kuxmann suggested that this compound melts peritectically (P 3 S 2 → P 2 S + Liquid) at 715°C and forms a eutectic with PS at 705°C; that, however, can be a result of the undercooling of the liquid. Hirota (1981) from EPMA measurements reported Pb 5 SiO 7 , melting incongruently at 733°C and decomposing when cooled below 702°C, and Pb 11 Si 3 O 17 , melting congruently at 728°C; no phase of exact Pb 4 SiO 6 composition was found. The crystal structure of Pb 11 Si 3 O 17 was determined by Kato.…”

Section: Introductionmentioning

confidence: 99%

“…All the melting and eutectic temperatures are within a relatively narrow temperature range, 717°C‐760°C. The reported invariant points are compared in Table .…”

Section: Introductionmentioning

confidence: 99%

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Experimental phase equilibria studies of the PbO–SiO₂ system

Shevchenko

Jak

2017

J Am Ceram Soc

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Phase equilibria of the PbO-SiO 2 system have been established for a wide range of compositions: (i) liquid in equilibrium with silica polymorphs (quartz, tridymite, and cristobalite) between 740°C and 1580°C, at 60-90 mol% SiO 2 ; (ii) with lead silicates (PbSiO 3 , Pb 2 SiO 4 , and Pb 11 Si 3 O 17 ) and lead oxide (PbO) between 700°C and 810°C. A high-temperature equilibration/quenching/electron probe X-ray microanalysis (EPMA) technique has been used to accurately determine the compositions of the phases in equilibrium in the system. Significantly, no liquid immiscibility has been found in the high-silica range, and the liquidus in this high-silica region has been accurately measured. The phase equilibria information in the PbO-SiO 2 system is of practical importance for the improvement of the existing thermodynamic database of lead-containing slag systems (Pb-Zn-Fe-Cu-Si-Ca-Al-Mg-O).

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Section: Discussionsupporting

confidence: 92%

Section: Resultsmentioning

confidence: 66%

Section: Resultsmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

“…All the melting and eutectic temperatures are within a relatively narrow temperature range, 717°C‐760°C. The reported invariant points are compared in Table .…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations