Sumita Optical Glass, Inc.

Dai Anzai

Tatsuya Tezuka

The multicomponent oxide glass has a composition including: 45-53 mol % SiO; 22-30 mol % BO; 5-9 mol % AlO; 0.02-0.10 mol % SbO; 0-18 mol % LiO; 0-18 mol % NaO; 0-18 mol % KO; 0-13 mol % MgO; 0-13 mol % CaO; 0-13 mol % BaO; and 0-13 mol % ZnO. When the total content of LiO, NaO, and KO is X mol % and the total content of MgO, CaO, BaO, and ZnO is Y mol %, 11≤X≤18 and 14≤X+Y≤24 hold, and the value of βOH calculated from βOH=α/t, where α represents a height of an absorption peak due to OH groups, observed in a range of 3400 cmto 3800 cmof an infrared absorption spectrum in no unit and t represents a thickness of the glass in cm, is 4 cmor more.

Multicomponent oxide glass, optical element, optical fiber, and method of producing multicomponent oxide glass

The present disclosure is to provide a method of producing a LTP or LATP crystal particle that has reduced impurity contamination, high crystallinity, and excellent dispersibility. The method of producing a LTP or LATP crystal particle according to the present disclosure includes: preparing glass containing, in molar ratio, 1+x of LiO, where 0&#x2264;x&#x2264;1, x of AlO, 4&#x2212;2x of TiO, 3+y of PO, where 1&#x2264;y&#x2264;4, and from more than y to less than 3y of ZnO; subjecting, after the preparation of glass, the glass to thermal treatment for crystallization; and selectively eluting a substance other than a LTP or LATP crystal through acid treatment.

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Saitama, Japan

Dai Anzai