Sintering behavior and properties of CABS/MgAl 2 O 4 composite for LTCC applications
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Sintering behavior and properties of CABS/MgAl2O4 composite for LTCC applications Fan Yang1, Ye Yuan2, Jin Li2, Caixia Zhang2, Jianxi Tong2,*, and Fancheng Meng1,*
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Department of Materials, Chongqing University of Technology, Chongqing 400054, China Jiaxing Glead Electronics Co. LTD, Jiaxing 314000, China
Received: 16 June 2020
ABSTRACT
Accepted: 19 August 2020
In this study, CaO–Al2O3–B2O3–SiO2(CABS) glass/MgAl2O4 composite for lowtemperature co-fired ceramics (LTCC) applications was prepared. The sinterability, microstructure, dielectric properties, mechanical properties, and coefficient of thermal expansion (CTE) of composite were determined. MgAl2O4 as ceramic filler improves the dielectric properties of the composite, mechanical properties, and density. The 45 wt% CABS glass contents composite sintered at 900 °C exhibit superior performance, which have relatively high bulk density, dielectric constant = 6.51, dielectric loss = 3.1 9 10–3 (10 GHz) and CTE = 4.51 ppm/°C, flexural strength = 261 MPa.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
1 Introduction In recent years, the electronic industry has developed rapidly, and electronic components’ devices are developing toward miniaturization, high reliability, and high integration. LTCC materials, which can be co-fired with Ag (961.8 °C), are suitable as substrates for miniaturization and integration devices [1–5]. In addition, LTCC materials have been widely used in electronics packaging due to its excellent dielectric properties and the low coefficient of thermal expansion (CTE). LTCC substrates’ materials can be matched with silicon (3.1 ppm/°C) and GaAs (5.7 ppm/ °C) [6, 7]. Currently, glass/ceramic composites are the most common material in LTCC, the densification temperature can be adjusted by changing the contents of glass phase, and the ceramic fillers provide
excellent mechanical and electrical properties in the glass/ceramic composites system [8]. Recently, different glass systems were designed to cater to the specific purpose, such as CaO–B2O3– SiO2(CBS), Li2O–B2O3–SiO2(LBS), BaO–Al2O3–B2O3– SiO2(BABS), B2O3–SiO2(BS), CaO–Al2O3–B2O3–SiO2(CABS) [3, 9–13]. Among the glass system, CABS glass-based composite has been reported as one of the most promising LTCC materials because of the low sintering temperature (* 950 °C) and excellent dielectric properties [13–16]. Luo et al. [15] prepared well-densified CABS/Al2O3 composite with 55 wt% glass sintering at 825–875 °C. Liu et al. [16] obtained low tand value CABS/Al2O3 composite sintering at 875 °C. At the same time, the properties of composite can be adjusted by other appropriate ceramic filler. Xia et al. [14] obtained CAS/fused silica composite
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https://doi.org/10.1007/s10854-020-04293-8
J Mater Sci: Mater Electron
sintering at 900 °C, the dielectric constant lower than 5. Due to the low sintering properties of CABS glass, there are few limitations on ceramic materials, and the dens
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