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CN106187105A 高品质因数温度稳定型低介电常数微波介电陶瓷Li2BaMgGeO5 无效 - 驳回

  • 专利标题： 高品质因数温度稳定型低介电常数微波介电陶瓷Li2BaMgGeO5
  • 专利标题（英）： High-quality-factor temperature-stable microwave dielectric ceramic Li2BaMgGeO5 with ultralow dielectric constant
  • 申请号： CN201610574128.8
    申请日： 2016-07-19
  • 公开(公告)号： CN106187105A
    公开(公告)日： 2016-12-07
  • 发明人: 方维双 , 段炼 , 苏和平
  • 申请人： 桂林理工大学
  • 申请人地址： 广西壮族自治区桂林市建干路12号
  • 专利权人： 桂林理工大学
  • 当前专利权人： 桂林理工大学
  • 当前专利权人地址： 广西壮族自治区桂林市建干路12号
  • 主分类号： C04B35/01
  • IPC分类号： C04B35/01 ;  C04B35/622 ;  C04B35/626
高品质因数温度稳定型低介电常数微波介电陶瓷Li2BaMgGeO5
摘要：
本发明公开了一种高品质因数温度稳定型低介电常数微波介电陶瓷Li2BaMgGeO5及其制备方法。(1)将纯度为99.9％(重量百分比)以上的Li2CO3、BaCO3、MgO和GeO2的原始粉末按Li2BaMgGeO5的组成称量配料；(2)将步骤(1)原料湿式球磨混合12小时，球磨介质为蒸馏水，烘干后在1100℃大气气氛中预烧6小时；(3)在步骤成型，最后在1150～1200℃大气气氛中烧结4小时；所述的粘结剂采用质量浓度为5％的聚乙烯醇溶液，聚乙烯醇的添加量占粉末总质量的3％。本发明制备的陶瓷在1200℃以下烧结良好，介电常数达到20.4～21.1，其品质因数Qf值高达83000-107000GHz，谐振频率温度系数小，在工业上有着极大的应用价值。(2)制得的粉末中添加粘结剂并造粒后，再压制
摘要（英）：

The invention discloses high-quality-factor temperature-stable microwave dielectric ceramic Li2BaMgGeO5 with ultralow dielectric constant and a preparation method thereof; the preparation method includes: (1), weighing and burdening raw powders of Li2CO3, BaCO3, MgO and GeO2 having a purity of 99.9% and above (in percent by weight) according to composition of Li2BaMgGeO5; (2), wet ball-milling and mixing the material of step (1) for 12 hours by using distilled water as a ball milling medium, drying, and pre-sintering in atmosphere at 1150 DEG C for 6 hours; (3), adding a binder to the powder of step (2), granulating, press-forming, and sintering in atmosphere at 1200 to 1250 DEG C for 4 hours, wherein the binder is polyvinyl alcohol solution having a mass concentration of 5%, and the polyvinyl alcohol that is added accounts for 3% of the total mass of the powder. The ceramic prepared herein is well sinterable at 1200 DEG C and below, up to 20.4 to 21.1 in dielectric constant, up to 83000 to 107000 GHz in quality factor Qf and low in resonant frequency temperature coefficient and is highly worthy of application in the industry.

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