The Densification Behavior and Microwave Dielectric Properties of the CBS Glass-ceramics for LTCC Application

• Main Authors: Li, Zhaojun, Dong, Chao, Yan, Tingnan, Shen, Qinchen, Sun, Rong, Wang, Dawei
• Format: Conference Proceeding
• Language: English
• Subjects: Ca/Si; CaO-B 2 O 3 -SiO 2; Ceramics; dielectric properties; Dielectrics; Electromagnetic heating; Glass; Microwave integrated circuits; Microwave technology; Sintering
• ISSN: 2836-9823
• DOI: 10.1109/ICEPT59018.2023.10492375

In this work, the densification behavior and microwave dielectric properties of CaO-B 2 O 3 -SiO 2 (CBS) glass under different Ca/Si ratios and B 2 O 3 content were systematically studied. Additionally, the impact of sintering process on the dielectric properties was further discussed. The results indicated a significant increase in linear shrinkage from 14.9% to 51.9% as the Ca/Si ratio increasing from 0.8 to 1.5. Moreover, when the B 2 O 3 contents increased from 5.5 mol% to 7.5 mol%, there was a decrease in Ts from 744.2°C to 720.8°C, ε r decreased from 6.05 to 5.57, and tanδ decreased from 2.1×10 -3 to 1.4×10 -3 . Notably, when Ca/Si = 1.0 and B 2 O 3 = 7.5 mol%, the CBS glass-ceramics heated to 850°C at a heating rate of 5 °C/min for 45 min exhibited excellent microwave dielectric properties: ε r =5.53 (@12.22 GHz), tanδ= 1.3×10 -3 and Q×f~ 9166 GHz.