知搜-全球专利检索

  1. 登录
  2. 注册
发明公开
CN107955608A 一种LED用绿色荧光粉及其制备方法 无效 - 撤回

  • 专利标题： 一种LED用绿色荧光粉及其制备方法
  • 专利标题（英）： Green fluorescent powder for LED and preparation method of green fluorescent powder
  • 申请号： CN201711325157.1
    申请日： 2017-12-07
  • 公开(公告)号： CN107955608A
    公开(公告)日： 2018-04-24
  • 发明人: 张娜 , 朱月华 , 卓宁泽 , 蒋利华 , 王海波
  • 申请人： 南京工业大学
  • 申请人地址： 江苏省南京市鼓楼区金川门外5号
  • 专利权人： 南京工业大学
  • 当前专利权人： 南京工业大学
  • 当前专利权人地址： 江苏省南京市鼓楼区金川门外5号
  • 主分类号： C09K11/81
  • IPC分类号： C09K11/81
一种LED用绿色荧光粉及其制备方法
摘要：
本发明公开了一种LED用绿色荧光粉及其制备方法，其化学式为M8-xLa3(SiO4)3(PO4)3O2：xEu2+，(M＝Ca，Sr，Ba中的一种，0.001≤x≤0.5)，该绿色荧光粉以M8-xLa3(SiO4)3(PO4)3O2为基质，掺杂Eu2+。制备该绿色荧光粉主要采用高温固相法，具体步骤为：按照化学计量比称取所需的原料，球磨混合均匀，然后在N2/H2提供的还原性气氛下煅烧，冷却粉碎，研磨过筛，即得到所需的荧光粉。本发明制备的荧光粉对300nm～400nm光谱范围内的光具有强的吸收，发射光谱的峰位位于495nm～545nm的绿光光谱范围内，具有激发和发射光谱范围宽、发光强度高的优点。
摘要（英）：

The invention discloses green fluorescent powder for LED and a preparation method of the green fluorescent powder. The chemical formula of the green fluorescent powder for LED is M8-xLa3(SiO4)3(PO4)3O2: xEu2+ (M is one of Ca, Sr and Ba, and x is greater than or equal to 0.001 and less than or equal to 0.5). The green fluorescent powder takes M8-xLa3(SiO4)3(PO4)3O2 as a matrix, and is doped with Eu2+. A high-temperature solid-phase method is mainly used for preparing the green fluorescent powder and comprises the following specific steps: weighing required raw materials according to stoichiometric ratio; ball-milling and mixing uniformly; then calcining the raw materials in a reducing atmosphere provided by N2/H2; and cooling and pulverizing, and grinding and sieving to obtain the requiredfluorescent powder. The prepared fluorescent powder powerfully absorbs light in a spectral region of 300-400 nm, and the peak position of a transmitting spectrum is positioned in a green light spectrum range of 495-545 nm. The green fluorescent powder for LED has the advantages of wide exiting and transmitting light spectrum range and high luminous strength.

0/0