This work investigated the effects of CeO2 contents on structure, crystallization behavior and dielectric properties of CaO–B2O3–SiO2 glass composition. The MAS-NMR results showed that B occurred as BIIIa, BIIIs and BIV species and Si presented as Q2, Q3 and Q4 units in the glasses. As the increase of CeO2 content, the relative amounts of BIV and BIIIs unit decreased while the BIIIa units increased, and the amounts of Q4 and Q2 units increased while the Q3 unit decreased. With increasing CeO2 content, the value of Tg decreased from 743 °C to 717 °C, the activation energy for CaSiO3 first increased and then decreased. For glass–ceramics samples sintered at 825 °C, all samples had the crystalline phases of CaSiO3, CaB2O4, Ca2SiO4. In addition, the samples with CeO2 content more than 1 mol% had CeO1.695 phase, which changed to be the main crystalline phase when the content of CeO2 increased up to 10 mol%. The εr of the glass–ceramic samples with CeO2 content x ≤ 6 showed an ascend trend in total, and decreased sharply to 4.1 for the sample with x = 10. However, the dielectric loss tan δ would not change significantly with the increasing of CeO2 content. The samples with 1 mol% CeO2 sintered at 825 °C owned εr of 5.4, tan δ of 0.9 × 10− 3, and CTE of 7.8 × 10− 6/K. The results indicated that CaO–B2O3–SiO2 with CeO2 glass–ceramics could be a potential LTCC substrate material.
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This work was supported by the fund of the Basic Applied Research Foundation of Yunnan Province (Grant No. 2016FD125, 2016FB083), Key New Product Project of Yunnan Province (Grant No. 2016BA009), Chinese academy of Sciences Key Project (Grant No. KLIFMD201605) and 2017 Kunming Advanced Talent Funding (13020163).