R&D of next generation millimeter-wave dielectrics with low dielectric constant and high Q

右

• 批准号: 22560673
• 负责人: OHSATO Hitoshi
• 金额: $ 2.91万
• 依托单位: 公益財団法人名古屋産業科学研究所 (2012)Nagoya Industrial Science Research Institute (2010-2011)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22560673/
• 关键词: ミリ波誘電体高Q; 高品質係数; 低誘電体損失; 温特ゼロ; インデイアライト/コーディエライト; 結晶化ガラス; 国際研究者交流; ミリ波誘電体; 高Q 高品質係数; インディアライト/コーディエライト; 誘電体; マイクロ波・ミリ波誘電体; 結晶化ガラスセラミックス; コーディエライト; インディアライト; オーダリング; リートベルト解析

Millimeter-wave dielectrics of glass ceramics are formed from the glass with cordierite composition. Glass ceramics composed by indialite which is a polymorph of cordierite were formed. The glass ceramics with superior properties such as high Qf > 200,000 GHz, low dielectric constant (ε_r) of 4.7, temperature coefficient of resonant frequency (TCf) = -27 ppm/℃. But, the glass ceramics shown an anisotropic feature crystallized from glass surface. Cordierite is well known as low thermal expansion material with minus expansion to c-axis and plus expansion to a-axis. A serious problem of clacks appears at the point met the crystals grew from different glass surface. As large cracks are reduced by slow cooling after sintering, measurement of millimeter-wave properties was possible. But, small clacks affected to the Qf values so as to be random variation. Moreover, rutile powder was added in the glass composition for crystal growth agent so as to crystalize in the volume of grass. Consequently, millimeter-wave dielectrics without the cracks and with good properties were fabricated. The properties are as follows: Qf= 120,000GHz, TCf= 0 ppm/OC, ε_r = 7.

玻璃陶瓷的毫米波电介质是由堇青石成分的玻璃形成的，该玻璃陶瓷具有高Qf > 200,000 GHz、低介电常数(ε_r)等优异性能。 4.7，谐振频率温度系数(TCf)=-27 ppm/℃，但是，玻璃陶瓷呈现出结晶的各向异性特征。堇青石是众所周知的低热膨胀材料，在c轴方向为负膨胀，在a轴方向为正膨胀，在不同玻璃表面生长的晶体处会出现严重的裂纹问题。通过烧结后缓慢冷却，可以测量毫米波特性，但是，小裂纹会影响Qf值，从而导致随机变化，并且，在晶体生长剂的玻璃组合物中添加了金红石粉末。结晶于经测试，制备出无裂纹且性能良好的毫米波电介质，其性能如下：Qf=120,000GHz，TCf=0ppm/OC，ε_r=7。

项目成果

Functional advances of microwave dielectrics for next generation

下一代微波电介质的功能进步

• 发表时间: 2011
• 影响因子: 5.2
• 作者: H. Ohsato

Fabrication of indialite glass ceramics with high Q and low dielectric constant for millimeterwave dielectrics

用于毫米波电介质的高 Q 值和低介电常数的 Indialite 玻璃陶瓷的制备

• 发表时间: 2012
• 作者: H. Ohsato; J;I. Kaomiya
• 通讯作者: I. Kaomiya

Fabrication of indialite glass ceramics with low dielectric constant for millimeterwave dielectrics

毫米波电介质用低介电常数Indialite玻璃陶瓷的制备

• 发表时间: 2012
• 作者: H. Ohsato; A
• 通讯作者: A

Microwave Dielectric Ceramics with Rare-Earth (I)

稀土微波介质陶瓷（I）

• 发表时间: 2012
• 作者: Hitoshi OHSATO; Isao KAGOMIYA; Jeong Seog KIM; Chae Il Cheon
• 通讯作者: Chae Il Cheon

低誘電率・高Qインディエライト/コーディエライト結晶化ガラス誘電体

低介电常数/高Q值堇青石/堇青石结晶玻璃电介质

• 发表时间: 2011
• 作者: 大里齊; J;I. Kagomiya
• 通讯作者: I. Kagomiya