Article
Chemistry, Physical
Zhen Wang, Renze Xu
Summary: This study investigated the non-isothermal crystallization of CaO-SiO2-Al2O3-TiO2 glass using the Matusita-Sakka equation and differential thermal analysis. The heat treatment process led to the formation of dense bulk glass-ceramics due to strong heterogeneous nucleation at the particle boundaries under nucleation saturation conditions. Three crystal phases were formed: CaSiO3, Ca3TiSi2(AlSiTi)(3)O-14, and CaTiO3. Increasing TiO2 content shifted the main crystal phase from CaSiO3 to Ca3TiSi2(AlSiTi)(3)O-14. The activation energy of crystal growth (EG) ranged from 286-789 kJ/mol, initially decreasing and then increasing with increasing TiO2. TiO2 acted as an efficient nucleating agent within 14% content, promoting the growth of wollastonite through a two-dimensional mechanism. However, TiO2 exceeding 18% hindered the crystallization of wollastonite and resulted in surface crystallization with higher activation energy of crystal growth.
Article
Materials Science, Ceramics
Zhi Li, Guojun Ma, Dingli Zheng, Xiang Zhang, Rodrigue Armel Muvunyi
Summary: The feasibility of preparing low-cost glass-ceramics from Zn-containing dust and secondary molten slag generated during the carbothermal reduction of copper slag was investigated. It was found that the ZnO content has a significant effect on the crystallization behavior and properties of the glass-ceramics.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
H. A. Abo-Mosallam, S. Ibrahim, Ebrahim A. Mahdy
Summary: In this study, the authors investigated the effects of composition modification on crystallization characteristics and magnetic behavior by partially introducing NiO into the 23.5Li(2)O-11.5CaO-55SiO(2) eutectic glass system. The addition of NiO improved the density, hardness, and chemical durability of the glass-ceramics, while also significantly enhancing their magnetic properties. These glass-ceramics show great potential in electronic devices, wear-resistance uses, and biomedicine applications.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Nanoscience & Nanotechnology
Yu Shi, Xiwen Song, Xiaoxing Han, Mingxing Zhang, Mengyao Dong
Summary: The study revealed that the addition of Fe and Ce in different forms in CAMS glass-ceramics can affect the formation of crystals. Ce addition favors the formation of Ce-containing solid solution diopside, while Fe addition promotes diopside formation. Additionally, the role of CeO6 contributes to the precipitation of albite and anorthite.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Materials Science, Ceramics
Wenguo Liu, Haibin Zuo, Xiangdong Xing, Yijun Xu, Wang Ding, Jingsong Wang, Qingguo Xue
Summary: The influence of BaO content on the network structure evolution and properties of glass-ceramics prepared from blast furnace (BF) slag was investigated. The results showed that a moderate addition of BaO enhanced the Si-based structure, decreased the Al-based structure, and improved the migration resistance of ions. The addition of BaO also resulted in the generation of diopside and augite, as well as densified structure with uniform distribution of crystals at 3 wt % BaO content.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Ningbo Mu, Daimeng Chen, Bo Li
Summary: The influence of Zn/Ba ratio on crystallization, sintering behavior, and properties of CAS glass-ceramics was investigated. Increasing the Zn/Ba ratio changes the main crystal phase and improves the sintering and crystallization processes. CAS glass-ceramics with a Zn/Ba ratio of 4/6 exhibit superior characteristics, including high flexural strength, thermal stability, and low dielectric loss.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Leibo Deng, Wenwei Lu, Zhen Zhang, Zhe Fu, Hao Li, Hua Chen, Yongsheng Du, Yonghong Ma, Wencai Wang
Summary: Glass ceramics were successfully prepared from Cr-bearing slag, and the effect of slag content on crystallization behavior and morphology was investigated. The results showed a consistent decrease in crystallization activation energy with increasing slag content in the samples. Additionally, the study suggested that CMAS glass ceramics could be synthesized from Cr-bearing slag without the need for an additional nucleating agent.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Ceramics
Kei Maeda, Kosho Akatsuka, Atsuo Yasumori
Summary: The strength of glass largely depends on the size of flaws on its surface, with large flaws leading to considerable deterioration in strength. The damage resistance of CAS-GC was evaluated in bending tests and showed higher strength and absence of large sharp flaws compared to SLS glass.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Zehui Lin, Jiaqi He, Menghong Li, Mingwei Li, Ju Zhou, Shiqi Li, Ping Yang, Wenhan Qi, Jiao Han, Yiming Zeng
Summary: CaO-B2O3-SiO2-Nb2O5 (CBSN) glass-ceramics were synthesized through melt water quenching and isothermal heat treatment. The addition of Nb2O5 disrupted the combination of B-O and SiO, reducing the number of [BO31 and [SiO41 units. Increasing Nb2O5 doping amount led to higher softening temperature (Tg), initial temperature of crystallization peak (Tc), temperature corresponding to the endothermic peak intensity (Tp), and activation energy values of CaSiO3 and CaB2O4 crystal phases, indicating hindered crystallization. The XRD results showed a phase transformation from α-CaSiO3 to B-CaSiO3 to CaNb2O6 with Nb2O5 addition. The CBSN2 glass-ceramics sintered at 865°C for 15 min exhibited excellent dielectric properties, indicating their potential as LTCC substrate material.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
Lais D. Silva, Fernanda C. Puosso, Viviane O. Soares, Oscar Peitl Filho, Simone do R. F. Sabino, Francisco C. Serbena, Murilo C. Crovace, Edgar D. Zanotto
Summary: Bioactive glasses and glass-ceramics show effective bone tissue regeneration, with this study focusing on a rarely studied bioactive glass composition (45S5-K) with improved mechanical properties. The sintered glass-ceramic exhibited good fracture strength, low elastic modulus, and high bioactivity, offering potential for bone regeneration applications.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Leonardo Sant'Ana Gallo, Fabrice Celarie, Jefferson Bettini, Ana Candida M. D. Rodrigues, Tanguy Rouxel, Edgar D. Zanotto
Summary: In this study, transparent glass-ceramics with high hardness and fracture toughness were obtained through a refined heat-treatment protocol. The mechanical properties, including fracture toughness and hardness, were characterized and compared with the parent glass.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Rui-Feng Xin, Xing-Min Guo
Summary: This study characterizes and analyzes the crystallization of glass phases in the CaO-SiO2-Al2O3 system, and discusses the effects of alkalinity and Al2O3 content on crystallization. The results show that the chemical composition significantly influences the crystallization of the glass phases, with decreasing alkalinity favoring crystallization and increasing Al2O3 content inhibiting crystallization.
Article
Materials Science, Ceramics
Xuyang Zhang, Xingzhong Guo, Jinming Zhang, Xianping Fan, Mingxing Chen, Hui Yang
Summary: The 58S Na2O-CaO-SiO2-P2O5 bioactive glass was successfully prepared through a high-temperature melting process, and its nucleation, crystallization behavior, and hydroxyapatite precipitation were investigated. Optimal nucleation and crystallization conditions can produce 58S bioactive glass-ceramics with spherical nano-scale hydroxyapatite crystals. Compared to 45S bioactive glass, the resulting 58S bioactive glass exhibits higher HA precipitation ability after treatment with artificial saliva, with brushite and HA phases precipitating simultaneously, showing higher bioactivity. The prepared 58S bioactive glass and glass-ceramic hold promise for use as bioactive materials in biomedicine and biotechnology.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Hong-Yang Wang, Guo-Hua Zhang, Kuo-Chih Chou
Summary: By using CaS as a sulfurization agent, this study successfully produced Cu-Fe-S matte with low iron content and high copper grade, providing a new approach for the production of metallic copper.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Ceramics
T. Carlier, R. Podor, S. Saitzek, L. Montagne, P. Roussel, F. O. Mear
Summary: The crystallization pathways of BCAS glass were determined as a function of time and temperature using various characterization techniques. The composition of crystallized phases depends on the geometry of the glass and applied geometrical constraints, which control the volume fraction of crystallized glass melt and modify reactional pathways.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)