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    • 1. 发明授权
    • Synthesis of gamma calcium pyrophosphate
    • γ-焦磷酸钙的合成
    • US5667761A
    • 1997-09-16
    • US717038
    • 1996-09-20
    • Cheryl M. ForsterScott A. Meilicke
    • Cheryl M. ForsterScott A. Meilicke
    • C01B25/42
    • C01B25/42
    • A pure gamma calcium pyrophosphate for use in e.g., the production of calcium haloapatite fluorescent phosphor host materials, and a process for the synthesis thereof. Dicalcium orthophosphate is dissolved in a dilute solution of nitric acid in water, and spray-dried to form a calcium phosphate powder including a major phase of spherically shaped particles of dicalcium orthophosphate. The calcium phosphate powder is fired in air to convert the calcium phosphate powder to pure gamma calcium pyrophosphate. Gamma pyrophosphate will not undergo dehydration during firing of the fluorescent phosphor; thus larger quantities of phosphor can be processed in a firing vessel.
    • 用于例如钙卤磷灰石荧光磷光体主体材料的制造的纯γ焦磷酸钙及其合成方法。 将正磷酸二钙溶解在硝酸在水中的稀释溶液中,并喷雾干燥以形成磷酸钙粉末,其包括正磷酸二钙球形颗粒的主相。 将磷酸钙粉末在空气中焙烧以将磷酸钙粉末转化为纯的γ-焦磷酸钙。 焦磷酸铵在荧光荧光粉的烧制过程中不会脱水; 因此可以在烧制容器中处理更多量的磷光体。