Laser heating induced spatial homogenization of phase separated Na $_{2}$ O-B $_{2}$ O $_{3}$ -SiO $_{2}$ glass plate with bearing NiO for heat center and structural probe

Tomita, Kana*; Kishi, Tetsuo*; Matsumura, Daiju ; Yano, Tetsuji*

Na $_{2}$ O-B $_{2}$ O $_{3}$ -SiO $_{2}$ glass plate phase separated in spinodal was partially remelted and homogenized by laser heating. As heat generation source, 0.8 mol% NiO was added to absorb continuous-wave laser with =1064 nm. After acid leaching, borate phase with NiO was remaining partially in laser irradiated area. X-ray Absorption Fine Structure (XAFS) spectra revealed that Ni $^{2+}$ in laser irradiated area showed coordination change from 6 coordinated octahedral to 5 coordinated in square pyramid along with apparent color change from green to brown. Similar change was observed in water-quenched specimen from 1000 $^{circ}$ C. Ni $^{2+}$ transition gave additional structural information in phase separate / homogeneous glass, which was difficult to be distinguished by spectroscopy which focuses on covalent bonding of glass network.

Language	:	English
Journal	:	Journal of Non-Crystalline Solids
Volume	:	597
Number	:
Pages	:	p.121891_1 - 121891_10
Publication Year/Month	:	2022/12
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Held date	:
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Location (country)	:
Patent information	:
PDF	:
Paper URL	:	https://doi.org/10.1016/j.jnoncrysol.2022.121891
DOI for research data	:
Keywords	:	XAFS; ホウ珪酸ガラス; レーザー加熱
Research Facility	:	SPring-8(大型放射光施設)
Press Release	:
Article of JAEA R&D Review	:
Cooperating Institute	:	東京工業大学

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Registration No. : AA20220471
JAEA Abstracts No. : 50001089
Paper Submission No. : 25850

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Laser heating induced spatial homogenization of phase separated NaO-BO-SiO glass plate with bearing NiO for heat center and structural probe

Laser heating induced spatial homogenization of phase separated Na $_{2}$ O-B $_{2}$ O $_{3}$ -SiO $_{2}$ glass plate with bearing NiO for heat center and structural probe