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Phase structure and microwave dielectric properties of 0.85(0.74CaTiO3–0.26SmAlO3)–0.15Ca1.15Sm0.85Al0.85Ti0.15O4 composite ceramics prepared by reaction-sintering process.
- Source :
- Journal of Materials Science: Materials in Electronics; Apr2021, Vol. 32 Issue 7, p8863-8871, 9p
- Publication Year :
- 2021
-
Abstract
- 0.85(0.74CaTiO<subscript>3</subscript>–0.26SmAlO<subscript>3</subscript>)–0.15Ca<subscript>1.15</subscript>Sm<subscript>0.85</subscript>Al<subscript>0.85</subscript>Ti<subscript>0.15</subscript>O<subscript>4</subscript> (CSC) composite ceramics were prepared by a reaction-sintering method. The phase structure, sintering behavior and microwave dielectric properties of CSC ceramics were investigated. The preparation process of reaction-sintering route (RS) is simple. XRD patterns show that Ca<subscript>0.74</subscript>Ti<subscript>0.74</subscript>Sm<subscript>0.26</subscript>Al<subscript>0.26</subscript>O<subscript>3</subscript> (similar to CaTiO<subscript>3</subscript>), SmAlO<subscript>3</subscript> and Ca<subscript>1.15</subscript>Sm<subscript>0.85</subscript>Al<subscript>0.85</subscript>Ti<subscript>0.15</subscript>O<subscript>4</subscript> phases are formed in the CSC ceramics. The grain size and dielectric constant of CSC ceramics increase with rising the sintering temperature. As the sintering temperature increases, the quality factor (Q × f) and τ<subscript>f</subscript> value of the CSC ceramics increase to the maximum values first and then decrease. The bulk density fluctuates up and down around a value, but little change. The ceramics sintered at 1500 °C got the best microwave dielectric performances with ε<subscript>r</subscript> = 35.9, Q × f = 49,221 GHz, τ<subscript>f</subscript> = − 0.53 ppm/°C. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09574522
- Volume :
- 32
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Journal of Materials Science: Materials in Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 149906377
- Full Text :
- https://doi.org/10.1007/s10854-021-05559-5