Structure and microwave dielectric properties of novel walstromite-type MCa2Si3O9 (M = Ba, Sr) ceramics

Yang, Jun; Xie, Qiang; Ao, Laiyuan; Wu, Shengde; Zhu, Xueting; Zhong, Qiuyan; Xu, Yueyang; Fang, Zixuan; Tang, Xianzhong; Tang, Bing

doi:10.1016/j.ceramint.2023.05.259

Cited by 6 publications

(3 citation statements)

References 37 publications

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“…Walstromite is characterized as a cyclosilicate mineral featuring Si 3 O 9 rings composed of three silicon tetrahedra. Its presence has been reported in the literature in the context of ceramics with electrical properties [31][32][33][34]. Walstromite exhibits a structure similar to wollastonite's structure (CaSiO 3 ), with minimal structural alterations resulting from the substitution of Ca 2+ with Ba 2+ [35,36].…”

Section: Introductionmentioning

confidence: 89%

New 3D Printed Scaffolds Based on Walstromite Synthesized by Sol–Gel Method

Chiriac,

Popescu,

Pele

et al. 2024

JFB

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This study explores the potential utilization of walstromite (BaCa2Si3O9) as a foundational material for creating new bioceramics in the form of scaffolds through 3D printing technology. To achieve this objective, this study investigates the chemical–mineralogical, morphological, and structural characteristics, as well as the biological properties, of walstromite-based bioceramics. The precursor mixture for walstromite synthesis is prepared through the sol–gel method, utilizing pure reagents. The resulting dried gelatinous precipitate is analyzed through complex thermal analysis, leading to the determination of the optimal calcination temperature. Subsequently, the calcined powder is characterized via X-ray diffraction and scanning electron microscopy, indicating the presence of calcium and barium silicates, as well as monocalcium silicate. This powder is then employed in additive 3D printing, resulting in ceramic scaffolds. The specific ceramic properties of the scaffold, such as apparent density, absorption, open porosity, and compressive strength, are assessed and fall within practical use limits. X-ray diffraction analysis confirms the formation of walstromite as a single phase in the ceramic scaffold. In vitro studies involving immersion in simulated body fluid (SBF) for 7 and 14 days, as well as contact with osteoblast-like cells, reveal the scaffold’s ability to form a phosphate layer on its surface and its biocompatibility. This study concludes that the walstromite-based ceramic scaffold exhibits promising characteristics for potential applications in bone regeneration and tissue engineering.

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Section: Introductionmentioning

confidence: 89%

New 3D Printed Scaffolds Based on Walstromite Synthesized by Sol–Gel Method

Chiriac,

Popescu,

Pele

et al. 2024

JFB

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show abstract

“…In the same year, Yang et al. demonstrated that lattice and bonding energies of the Si–O bond played a dominant role in the quality factor of MCa 2 Si 3 O 9 (M = Ba, Sr) ceramics through P–V–L theory 3 . In 2022, Wu et al.…”

Section: Introductionmentioning

confidence: 99%

“…P–V–L theory had been widely used in the field of microwave dielectric ceramics since Xia et al. evaluated microwave dielectric properties based on chemical bond properties in 2012 1–6 . In 2023, Yin et al.…”

Section: Introductionmentioning

confidence: 99%

Effects of oxygen vacancy on bond ionicity and microwave dielectric properties of Y_xCe₁₋_xO_2−0.5_x (x = 0–0.7) ceramics

Shi,

Wang,

Xia

et al. 2024

J Am Ceram Soc.

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Novel YxCe1−xO2−0.5x (x = 0–0.7) ceramics, designed by replacing Ce4+ with Y3+, were prepared using a conventional oxide reaction. The oxygen vacancies, measured by X‐ray photoelectron spectroscopy and analyzed through the electronic structure calculated via the first‐principles method, were employed to investigate the effective valence electron charge, which plays a decisive role in calculating bond ionicity using P–V–L theory. After the substitution of Y3+ ions, the effective valence electron charge of the Ce–O bond changed because of an increase in oxygen vacancies, ultimately leading to a decrease in the Ce/Y–O bond ionicity of the YxCe1−xO2−0.5x ceramics. For microwave dielectric properties, when the YxCe1−xO2−0.5x (x = 0−0.5) ceramics were in the pure phase, porosity‐corrected permittivity and Q × f values depended on the bond ionicity, and the temperature coefficient of the resonance frequency was analyzed using the bond valence. When the YxCe1−xO2−0.5x (x = 0.6 and 0.7) ceramics were in multiple phases, the microwave dielectric properties were associated with the phase composition.

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Crystal structure, Raman spectra, and microwave dielectric properties of a novel temperature-stable LiY9Si6O26 ceramic with hexagonal structure

Liang,

Li,

Zhang

et al. 2023

Ceramics International

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Structure and microwave dielectric properties of novel walstromite-type MCa2Si3O9 (M = Ba, Sr) ceramics

Cited by 6 publications

References 37 publications

New 3D Printed Scaffolds Based on Walstromite Synthesized by Sol–Gel Method

New 3D Printed Scaffolds Based on Walstromite Synthesized by Sol–Gel Method

Effects of oxygen vacancy on bond ionicity and microwave dielectric properties of Y_xCe₁₋_xO_2−0.5_x (x = 0–0.7) ceramics

Crystal structure, Raman spectra, and microwave dielectric properties of a novel temperature-stable LiY9Si6O26 ceramic with hexagonal structure

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Structure and microwave dielectric properties of novel walstromite-type MCa2Si3O9 (M = Ba, Sr) ceramics

Cited by 6 publications

References 37 publications

New 3D Printed Scaffolds Based on Walstromite Synthesized by Sol–Gel Method

New 3D Printed Scaffolds Based on Walstromite Synthesized by Sol–Gel Method

Effects of oxygen vacancy on bond ionicity and microwave dielectric properties of YxCe1−xO2−0.5x (x = 0–0.7) ceramics

Crystal structure, Raman spectra, and microwave dielectric properties of a novel temperature-stable LiY9Si6O26 ceramic with hexagonal structure

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Effects of oxygen vacancy on bond ionicity and microwave dielectric properties of Y_xCe₁₋_xO_2−0.5_x (x = 0–0.7) ceramics