研究目的
Investigating the structure, crystallization, and dielectric properties of Al2O3 filled CaO–B2O3–SiO2–Al2O3 glass composites for LTCC applications.
研究成果
The addition of Al3+ into CaO–B2O3–SiO2 glass modifies the glass structure, increasing the Q4 structural unit and improving densification and dielectric properties. The C1A03 glass system with 50 wt% alumina filler exhibited the best performance in terms of dielectric constant and Qxf value, making it suitable for LTCC applications.
研究不足
The study focuses on the effects of Al2O3 addition on glass structure and properties, but does not explore the impact of other potential additives or variations in processing conditions beyond the specified range.
1：Experimental Design and Method Selection:
The study involved preparing CaO–B2O3–SiO2 and CaO–B2O3–SiO2–Al2O3 glasses by melting reagent grade powders in a Pt crucible, quenching in distilled water, and planetary ball milling.
2：Sample Selection and Data Sources:
The glass powders were mixed with different volume fractions of α-alumina powder and pressed into pellets.
3：List of Experimental Equipment and Materials:
Equipment included a differential thermal analyzer (DTA), dilatometer, NMR spectrometers, X-ray diffractometer, SEM, and vector network analyzer. Materials included reagent grade CaO, Al2O3, MgO, CaCO3, K2CO3, B2O3, and SiO
4：Experimental Procedures and Operational Workflow:
Samples were sintered at temperatures ranging from 800°C to 900°C. DTA, dilatometric analysis, NMR, XRD, SEM, and dielectric property measurements were conducted.
5：Data Analysis Methods:
Data were analyzed using spectral deconvolution software, XRD intensity ratios for phase quantification, and SEM for microstructure examination.
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NMR spectrometer
Bruker Avance 400
Bruker
Used to collect NMR data on glass samples.
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SEM
Hitachi, S-4100
Hitachi
Used to examine the microstructures of sintered samples.
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Vector network analyzer
Keysight Tech., E5071C ENA
Keysight Tech.
Used to measure the microwave dielectric properties of samples.
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Pt crucible
Used for melting glass powders.
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Differential thermal analyzer
Netzsch STA 409C
Netzsch
Used to determine the crystallization behavior of glasses.
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Dilatometer
Netzsch, 402PC
Netzsch
Used to measure the thermal shrinkage behavior of glasses.
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X-ray diffractometer
Dandong Fangyuan, DX-2700
Dandong Fangyuan
Used to characterize the crystalline phase evolution in glass samples.
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