Coprecipitation synthesis of Ca14Al10Zn6O35:Mn4+ deep‐red phosphor and silica‐modified waterproofing ability
Ca14Al10Zn6O35:Mn4+ (CAZ:Mn) phosphor material, which shows deep‐red luminescence, was synthesized by the coprecipitation (COP) method using a Na2CO3/NaOH solution as the precipitant. COP–CAZ:Mn phosphor exhibited a 2.1 times higher luminescence intensity than the corresponding phosphor prepared usi...
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Veröffentlicht in: | Journal of the American Ceramic Society 2023-02, Vol.106 (2), p.1149-1158 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Ca14Al10Zn6O35:Mn4+ (CAZ:Mn) phosphor material, which shows deep‐red luminescence, was synthesized by the coprecipitation (COP) method using a Na2CO3/NaOH solution as the precipitant. COP–CAZ:Mn phosphor exhibited a 2.1 times higher luminescence intensity than the corresponding phosphor prepared using the conventional solid‐state reaction (SSR) method. This substantial increase in luminescence was mainly ascribed to the existence of a greater proportion of tetravalent manganese in COP–CAZ:Mn phosphor. Furthermore, COP–CAZ:Mn phosphor was modified with SiO2 via hydrolysis of tetraethoxysilane (TEOS) to waterproof the compound because it is easily decomposed through hydrolysis under humid conditions. The SiO2‐modified CAZ:Mn phosphor maintained its crystal structure and high photoluminescence intensity after the water‐resistance test. Therefore, waterproof CAZ:Mn phosphor with a high luminescence intensity was successfully discovered by utilizing the coprecipitation method and SiO2 modification. |
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ISSN: | 0002-7820 1551-2916 |
DOI: | 10.1111/jace.18831 |