| Project/Area Number |
16510072
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental technology/Environmental materials
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
NAKAMURA Hiroaki National Institute for Materials Science, Innovative Materials Engineering Laboratory, Senior Researcher, 材料ラボ, 主席研究員 (60354164)
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| Co-Investigator(Kenkyū-buntansha) |
MAIWA Koji National Institute for Materials Science, Innovative Materials Engineering Laboratory, Senior Researcher, 材料ラボ, 主任研究員 (10343849)
NAKATA Takesi Shibaura Institute of Technology, Professor, 工学部材料工学科, 教授 (40052815)
小澤 清 独立行政法人物質・材料研究機構, 材料研究所, 主幹研究員 (90343855)
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| Project Period (FY) |
2004 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2006: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2005: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2004: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | sulfur sensor / sulfur dioxide sensor / solid electrolyte / electrical conductivity / ionic conduction / electromotive force / sulfur pressure / ionic transport number / SOxセンサー / CaS-Na_2S固溶体 / Li_2O-B_2O_3-Li_2SO_4-Al_2O_3系電解質 / Soxセンサー / Li_2O-B_2O_3-Li_2SO_4-Al_2O_3系ガラス質 |
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| Research Abstract |
This study concerns two kinds of solid electrolytes for the sulfur sensor and SOx sensor, which enable instantaneous measurements of the amount of change of sulfur and of SOx concentration near the source in many industrial processes.
The sulfur concentration cell was prepared with use of 95CaS-5Na_2S solid solution as the sulfur solid electrolyte and the electromotive force (EMF) of the cell was measured. The values obtained from the EMF measurement are close to the theoretical values calculated from the Nernst equation, therefore the ionic transference number of this solid solution is unity.
The SOx concentration cell was also made with use of crystallized 33.9Li_2O-33.9B_2O_3-29Li_2SO_4-3.2Al_2O_3 as the solid electrolyte. From the results of the EMF measurement, it is concluded that the crystal phase of the solid electrolyte is an ionic conductor and the ionic transference number is also 1.
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