R&D of LTCC materials with high Q and low dielectric constant for millimeter-wave communications

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420721
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Inorganic materials/Physical properties
• Research Institution: Nagoya Industrial Science Research Institute
• Principal Investigator: OHSATO Hitoshi 公益財団法人名古屋産業科学研究所, 研究部, 上席研究員 (20024333)
• Co-Investigator(Kenkyū-buntansha): KAGOMIYA Isao 名古屋工業大学, 工学部, 准教授 (40318811)
• Co-Investigator(Renkei-kenkyūsha): ANDO Minato 名古屋工業大学, 工学部, プロジェクト教授 (50512456)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: マイクロ波誘電体 / ミリ波誘電体 / 低誘電損失・高Q / 低誘電率 / 温特ゼロ / 結晶化ガラス / 低温同時焼成セラミックス / インディアライト/コーディエライト

Outline of Final Research Achievements

Indialite powder with high quality factor (Q), low dielectric constants, and 1 micron diameter has been fabricated. And Low Temperature Co-fired Ceramics (LTCC) materials based the fine indialite powder have been researched. The first physical year: Indialite powder with 1 micron has been fabricated from glass with same composition of indialite, because indialite is intermediate phase during crystallized from glass to cordierite which is a polymorph of indialite. The glass was melted, crashed to coarse-grained particles and crystallized, and grained into fine particles by planetary ball milling. The second physical year: 7 pieces sintering aides were applied to LTCC sintering at around 900 oC, and selected some candidates for LTCC sintering aides. The third physical year: LTCC materials with good dielectric properties were developed focusing eutectic temperature (lowest temperature on the system) of B2O3-CuO and Bi2O3-CuO systems.

Free Research Field

材料工学・無機材料・物性　エレクトロセラミックス