Electron Spin Resonance (ESR) and optical absorption spectra of a manganese doped soda-lime-silicate glass system

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Srisittipokakun N., KedKaew C., Kaewkhao J., Kittiauchawal T., Thamaphat K., Limsuwan P.

ปีที่เผยแพร่ (ค.ศ.): 2009

วารสาร: Kasetsart Journal - Natural Science (0075-5192)

Volume number: 43

Issue number: 5 SUPPL.

หน้าแรก: 360

หน้าสุดท้าย: 364

จำนวนหน้า: 5

นอก: 0075-5192

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-77749314432&partnerID=40&md5=a3969a86f670cb7bfdac2c1ab2ab5e9f

ภาษา: English-Great Britain (EN-GB)

บทคัดย่อ

A (65-x)SiO2:10CaO:25Na2O:xMnO2 glass system with 0 ≤ x ≤ 0.5 mol% was prepared and investigated by X-ray diffraction, optical absorption and ESR spectroscopies. The XRD pattern of undoped glass confirmed the formation of an amorphous vitreous structure. The optical absorption spectra exhibited a predominant broad band around 500 run and its increase was clearly observed from 0.1 mol% of MnO2. This band corresponded to an allowed transition from 5Eg- →5T2g, of Mn3+ ions. When the MnO 2 concentration was increased, the absorption band due to Mn 3+ ions dominated. The ESR spectra results exhibited resonance signals at g = 2.0 with a sextet of hyperfine lines and less intensity at g ≈ 4.3. The group of hyperfine lines at g ≈ 2.0 represented Mn2+ ions in octahedral symmetry. However, these lines were broader and disappeared for higher MnO2 concentrations. This behavior indicated the reduction of Mn2+ ions in the glass system as the concentration of MnO 2 was increased by increasing the Mn3+ ions.

คำสำคัญ

Manganese ion, Soda-lime-silicate glass, Transition metal ion