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Full-spectrum multiphase fluorescent ceramic as well as preparation method and application thereof
The invention provides a full-spectrum complex-phase fluorescent ceramic and a preparation method and application thereof, the complex-phase fluorescent ceramic is composed of a nitride phase and an oxide phase, and the chemical composition of the nitride phase is Ca1-x-ySryAlSiN3: xEu (0lt; x is less than or equal to 0.03, 0lt; y < = 1), the crystal structure of which is the same as that of CaAlSiN3; the chemical composition of the oxide phase is (Lu1-x-a-bYaGdb) 3 (Al1-cGac) 5O12: xCe (0lt; x is not more than 0.06, and 0 is not more than alt; 1, 0 < = blt; 1, 0 < = clt; 1, 0 < = a + blt; 1), and the crystal structure is the same as that of Lu3Al5O12. According to the method, grain growth in the ceramic sintering process is effectively slowed down through short-time ceramic sintering and high heating and cooling rate, and in the short-time sintering process, nitride powder forms an oxide phase in situ, and meanwhile, the nitride powder is not greatly decomposed or sintered, so that the nitride powder becomes invalid. In short, through short-time high-temperature pulse sintering, sintering densification of the composite ceramic is promoted, and sudden reduction of luminous efficiency caused by oxidation of a nitride phase in a long-time high-temperature process is avoided.
本发明提供了一种全光谱的复相荧光陶瓷及其制备方法和应用，复相荧光陶瓷其由氮化物相和氧化物相两相构成，其中氮化物相的化学组成为Ca1‑x‑ySryAlSiN3:xEu(0<1，0≤b<1，0≤c<1，0≤a+b<1)，其晶体结构与Lu3Al5O12相同。本发明中，短时间的陶瓷烧结和较快的升降温速率，有效减缓了陶瓷烧结过程中的晶粒生长，且在短时间的烧结过程中，使得氮化物粉体在原位形成氧化物相的同时，没有使得其发生较大的分解或是烧结从而使得其失效。简而言之，通过短时间的高温脉冲烧结，既促进了复相陶瓷的烧结致密，又避免了长时间高温过程中氮化物相被氧化而造成的发光效率骤降。
Full-spectrum multiphase fluorescent ceramic as well as preparation method and application thereof
The invention provides a full-spectrum complex-phase fluorescent ceramic and a preparation method and application thereof, the complex-phase fluorescent ceramic is composed of a nitride phase and an oxide phase, and the chemical composition of the nitride phase is Ca1-x-ySryAlSiN3: xEu (0lt; x is less than or equal to 0.03, 0lt; y < = 1), the crystal structure of which is the same as that of CaAlSiN3; the chemical composition of the oxide phase is (Lu1-x-a-bYaGdb) 3 (Al1-cGac) 5O12: xCe (0lt; x is not more than 0.06, and 0 is not more than alt; 1, 0 < = blt; 1, 0 < = clt; 1, 0 < = a + blt; 1), and the crystal structure is the same as that of Lu3Al5O12. According to the method, grain growth in the ceramic sintering process is effectively slowed down through short-time ceramic sintering and high heating and cooling rate, and in the short-time sintering process, nitride powder forms an oxide phase in situ, and meanwhile, the nitride powder is not greatly decomposed or sintered, so that the nitride powder becomes invalid. In short, through short-time high-temperature pulse sintering, sintering densification of the composite ceramic is promoted, and sudden reduction of luminous efficiency caused by oxidation of a nitride phase in a long-time high-temperature process is avoided.
本发明提供了一种全光谱的复相荧光陶瓷及其制备方法和应用，复相荧光陶瓷其由氮化物相和氧化物相两相构成，其中氮化物相的化学组成为Ca1‑x‑ySryAlSiN3:xEu(0<1，0≤b<1，0≤c<1，0≤a+b<1)，其晶体结构与Lu3Al5O12相同。本发明中，短时间的陶瓷烧结和较快的升降温速率，有效减缓了陶瓷烧结过程中的晶粒生长，且在短时间的烧结过程中，使得氮化物粉体在原位形成氧化物相的同时，没有使得其发生较大的分解或是烧结从而使得其失效。简而言之，通过短时间的高温脉冲烧结，既促进了复相陶瓷的烧结致密，又避免了长时间高温过程中氮化物相被氧化而造成的发光效率骤降。
Full-spectrum multiphase fluorescent ceramic as well as preparation method and application thereof
一种全光谱的复相荧光陶瓷及其制备方法和应用
LI SHUXING (author) / HONG SEUNG-MOO (author) / XIE RONGJUN (author)
2024-07-12
Patent
Electronic Resource
Chinese
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