Synthesis of CaO-Na2O-Fe2O3-FeO-B2O3-SiO2 Glass-Ceramics for Hyperthermia Application by Aqueous Solution-Melt Method

2012 ◽  
Vol 535-537 ◽  
pp. 861-865
Author(s):  
Jian An Liu ◽  
Mei Mei Zhang ◽  
Xue Na Yang ◽  
Wen He
Keyword(s):  
Aqueous Solution ◽  
Saturation Magnetization ◽  
Electric Furnace ◽  
Glass Ceramic ◽  
Glass Ceramics ◽  
Vibrating Sample Magnetometer ◽  
Sio2 System ◽  
Specific Saturation Magnetization ◽  
Heat Treated ◽  
Molecular Scale

Based on the CaO-Na2O-Fe2O3-FeO-B2O3-SiO2 system, the ferrimagnetic glass-ceramic has been prepared for hyperthermia application by aqueous aolution-melt method. Using the aqueous solution solvent evaporation, we obtained the molecular-scale homogenously glass precursor. The precursor was completely melted in a lidded platinum crucible placed in an electric furnace at 1480°C for 1h and then annealed in a furnace at 550°C for 40min.The annealed glasses were heat treated at 1050°C for 2h to obtain the glass-ceramics. The crystallization of the glass systems with different component has been systematically investigated by using XRD, TG, as well as Vibrating Sample Magnetometer (VSM). The glass-ceramics with B2O3=3.0wt% show a strong magnetic, which contains highest value of specific saturation magnetization of 28.34A•m2/kg.

Preparation and Characterization of SrO-Na2O-Fe2O3-FeO-P2O5-SiO2 Ferrimagnetic Glass-Ceramics for Hyperthermia Application

2012 ◽  
Vol 557-559 ◽  
pp. 1612-1617
Author(s):  
Jian An Liu ◽  
Xue Na Yang ◽  
Mei Mei Zhang ◽  
Wen He
Keyword(s):  
Aqueous Solution ◽  
Saturation Magnetization ◽  
Electric Furnace ◽  
Glass Ceramic ◽  
Glass Ceramics ◽  
Vibrating Sample Magnetometer ◽  
Specific Saturation Magnetization ◽  
Heat Treated ◽  
Molecular Scale

The ferrimagnetic glass-ceramic based on SrO-Na2O-Fe2O3-FeO-P2O5-SiO2 system was prepared for hyperthermia application using aqueous aolution-melt method. Using the aqueous solution solvent evaporation, we obtained the molecular-scale homogenously glass precursor. The precursor was completely melted in a lidded platinum crucible placed in an electric furnace at 1480°C for 1h and then annealed in a furnace at 550°C for 40min.The annealed glasses were heat treated at 1050°C for 1h to obtain the glass-ceramics. The crystallization of the glass systems with different component has been systematically investigated by using XRD, TEM, as well as vibrating sample magnetometer (VSM). The glass-ceramics with P2O5=5.0wt% show a strong magnetic, which contains highest value of specific saturation magnetization of 24.89A•m2/kg.

Preparation and Characterization of Sro-Na2O-Fe2O3-P2O5-SiO2 Ferrimagnetic Glass-Ceramics for Hyperthermia Application

2012 ◽  
Vol 581-582 ◽  
pp. 457-462
Author(s):  
Jian An Liu ◽  
Xue Na Yang ◽  
Mei Mei Zhang ◽  
Wen He
Keyword(s):  
Aqueous Solution ◽  
Magnetic Properties ◽  
Magnetic Property ◽  
Glass Ceramic ◽  
Room Temperature ◽  
Glass Ceramics ◽  
Vibrating Sample Magnetometer ◽  
Heat Treated ◽  
Molecular Scale

The ferrimagnetic glass-ceramic based on SrO-Na2O-Fe2O3-P2O5-SiO2 system was prepared for hyperthermia application using aqueous aolution-melt method. Using the aqueous solution solvent evaporation, we obtained the molecular-scale homogenously glass precursor. The precursor was completely melted in a lidded platinum crucible placed in an electric furnace at 1480°C for 1h and then annealed in a furnace at 550°C for 40min.The annealed glasses were heat treated at 1050°C for 2h to obtain the glass-ceramics. The crystallization of the glass systems with different component has been systematically investigated by using XRD. Room temperature magnetic property of the samples were investigated using a Vibrating Sample Magnetometer(VSM). The evolution of magnetic properties in these glasses as a function of P2O5 quality concentration was discussed.

Preparation and Characterization of Coprecipitation-Derived Ferromagnetic Glass-Ceramic for Hyperthermia Application

2013 ◽  
Vol 834-836 ◽  
pp. 297-300
Author(s):  
Jian An Liu ◽  
Mei Mei Zhang ◽  
Xue Na Yang
Keyword(s):  
Melting Temperature ◽  
Glass Ceramic ◽  
Magnetic Induction ◽  
Glass Ceramics ◽  
Vibrating Sample Magnetometer ◽  
Molecular Scale

Ferromagnetic glass-ceramics could be used for magnetic induction hyperthermia. A ferromagnetic glass-ceramic in the system SiO2-Na2O-CaO-P2O5-Fe2O3has been prepared by melting of the coprecipitation-derived precursor. Using the coprecipitation-derived method, the molecular-scale homogenously glass precursor was obtained. This glass-ceramic contains a unique magnetite crystals precipitate during cooling from melting temperature without any nucleation and crystallization treatment. The crystallization of the glass systems with different component has been systematically investigated by using XRD, as well as vibrating sample magnetometer (VSM).

scholarly journals Augite-anorthite glass-ceramics from residues of basalt quarry and ceramic wastes

2015 ◽  
Vol 9 (2) ◽  
pp. 117-123 ◽  
Author(s):  
Gamal Khater ◽  
Safiah Abu ◽  
Esmat Hamzawy
Keyword(s):  
Thermal Expansion ◽  
Glass Ceramic ◽  
Crystallization Process ◽  
Coefficient Of Thermal Expansion ◽  
Glass Ceramics ◽  
Ceramic Samples ◽  
Heat Treated ◽  
Prepared Glass ◽  
Higher Temperature ◽  
Dominant Phase

Dark brown glasses were prepared from residues of basalt quarries and wastes of ceramic factories. Addition of CaF2, Cr2O3 and their mixture CaF2-Cr2O3 were used as nucleation catalysts. Generally, structures with augite and anorthite as major phases and small amount of magnetite and olivine phases were developed through the crystallization process. In the samples heat treated at 900?C the dominant phase is augite, whereas the content of anorthite usually overcomes the augite at higher temperature (1100?C). Fine to medium homogenous microstructures were detected in the prepared glass-ceramic samples. The coefficient of thermal expansion and microhardnessmeasurements of the glass-ceramic samples were from 6.16?10-6 to 8.96?10-6?C-1 (in the 20-500?C) and 5.58 to 7.16GP, respectively.

Preparation and Surface Modification of Magnetic Fe3O4 Nanoparticles

2020 ◽  
Vol 12 (2) ◽  
pp. 131-136
Author(s):  
Sha-Sha Li ◽  
Zao Tian ◽  
De-Zhan Tian ◽  
Lei Fang ◽  
Yu-Wei Huang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Saturation Magnetization ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Magnetic Fe3o4 Nanoparticles ◽  
Magnetic Fe3o4 ◽  
Scanning Electron

In this work, the coprecipitation method was used to prepare the magnetic Fe3O4 nanoparticles which were characterized by X-ray diffraction (XRD), vibrating sample magnetometer (VSM), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The particle size and saturation magnetization of Fe3O4 nanoparticles were significant effected by temperature and the precipitant's precipitation time. Under the reaction temperature of 40 °C and the dropping time of 10 h, the size and the saturation magnetization of magnetic Fe3O4 nanoparticles were 9.4 nm and 37.5 emu/g, severally. Besides, the magnetic Fe3O4 nanoparticles were also resoundingly modified with silica (SiO2), chitosan (CS) and sodium alginate (SA). And the hydrodynamic diameters of the Fe3O4/CS micro-composites and Fe3O4/SA micro-composites in aqueous solution were 1.16 μm and 2.11 μm, respectively.

Effect of CaO on Sintering and Crystallization of CaO-Al2O3-SiO2 System Phosphorus Slag Glass-Ceramic

2009 ◽  
Vol 66 ◽  
pp. 37-40 ◽  
Author(s):  
Jin Shu Cheng ◽  
Hui Guang Qiu ◽  
Li Ying Tang
Keyword(s):  
Glass Ceramic ◽  
Glass Ceramics ◽  
Careful Analysis ◽  
X Ray Diffraction ◽  
Sio2 System ◽  
X Ray ◽  
Temperature Range ◽  
Constant Content ◽  
Slag Glass ◽  
Crystal Content

Much phosphorus slag which is produced every year, not only brings about the resource waste, but also results in the pollution of the environment. In the paper, phosphorus slag was added into the glass-ceramics of CaO-Al2O3-SiO2 system. Through increasing the CaO content of CaO-Al2O3-SiO2 system glass-ceramics and keeping constant content of the phosphorus slag, the phosphorus slag glass-ceramics were obtained. The optimum compositions of CaO-Al2O3-SiO2 system phosphorus slag glass-ceramics was obtained through careful analysis based on X-ray diffraction (XRD), scanning electron microscopy (SEM) and other measuring methods. The results showed that with increasing of CaO content, the leveling temperature, the crystal content and the densities of samples were gradually increasing, however, the leveling temperature range was gradually narrowing. When the content of phosphorus slag was 30wt%, the addition of 17wt%CaO was more reasonable. The main phase of phosphorus slag glass-ceramic was β-wollastonite. The leveling temperature range of glass-ceramic was 1130-1140°C and the holding time was 2 hours.

Preparation and Characterization of SrO-Fe2O3-FeO-SiO2-B2O3 System Hexaferrites Glass-Ceramics

2012 ◽  
Vol 535-537 ◽  
pp. 855-860
Author(s):  
Jian An Liu ◽  
Mei Mei Zhang ◽  
Xue Na Yang ◽  
Wen He
Keyword(s):  
Glass Ceramics ◽  
Heat Treating ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Heat Treated ◽  
Mixed Compound ◽  
Anneal Temperature

Based on the SrO-Fe2O3-FeO-SiO2-B2O3 system, the M-type strontium hexaferrites glass ceramics has been prepared through heat treating the melted glass. Using the aqueous solution solvent evaporation and melt method, we obtained the glass precursor of molecular-scale homogenously mixed compound. The precursor was completely melted in a lidded platinum crucible placed in an electric furnace at 1480°C for 1h and then annealed in a furnace at 550°C for 40min. The crystallization of the glass systems with different component has been systematically investigated by using X-ray diffraction (XRD), Transmission Electron Micrographs (TEM) as well as Vibrating Sample Magnetometer (VSM). It is found that Fe3O4 crystal precipitated during naturally cooling the melt from 1480°C to anneal temperature. Moreover, the hexaferrite glass ceramics with the main crystal phase of SrFe12O19 was obtained after heat-treated at 860°C for 2 hours. The magnetic properties of the obtained hexaferrite glass ceramics indicated that the saturation magnetization and the coercivity were 8.1A•m2/kg and 114KA/m, respectively.

scholarly journals Tailoring the Glass Composition to Increase the Thermal Stability without Impacting the Crystallization Behavior of Oxyfluorophosphate Glass

Ceramics ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 148-159
Author(s):  
Nirajan Ojha ◽  
Iuliia Dmitrieva ◽  
Wilfried Blanc ◽  
Laeticia Petit
Keyword(s):  
Heat Treatment ◽  
Thermal Stability ◽  
Glass Ceramic ◽  
Glass Composition ◽  
Glass Ceramics ◽  
Glass Network ◽  
Thermally Stable ◽  
Heat Treated ◽  
The Impact ◽  
Thermal Stability Of

Even though the (75 NaPO3-25 CaF2) (in mol%) glass can be heat-treated into transparent glass-ceramic with Er3+ doped CaF2 crystals precipitating in the volume of the glass during heat-treatment, this glass was found to be a poor glass former, limiting its use as upconverter under 975 nm pumping. In this study, the impact of the glass composition on the thermal, optical and structural properties of the glass was investigated in order to understand how the glass composition can be tailored for the development of thermally stable upconverter glass-based material. The addition of MgO, Fe2O3 and Al2O3 in the NaPO3-CaF2 glass system increases the thermal stability of glass due to the depolymerization of the glass network. However, the changes in the glass composition also impacted on the nucleation and growth process. Indeed, CaF2 and other crystals were found in the newly developed glasses after heat-treatment leading to glass-ceramics with lower intensity of upconversion than the (75 NaPO3-25 CaF2) glass-ceramic used as a reference. Glasses were also prepared with different concentrations of Er2O3 and ErF3. These glasses were found to be promising as not only are they thermally stable, but they also exhibit green and red emission with high intensity under 975 nm pumping due to Er3+ clustering.

Preparation and Characterization of Superionic Conductive Li2O-Al2O3-La2O3-TiO2-P2O5 Glass-Ceramics

2012 ◽  
Vol 509 ◽  
pp. 314-320 ◽  
Author(s):  
Hong Ping Chen ◽  
Hai Zheng Tao ◽  
Qi De Wu ◽  
Xiu Jian Zhao
Keyword(s):  
Heat Treatment ◽  
Glass Ceramic ◽  
Glass Ceramics ◽  
Lithium Ion ◽  
Treatment Temperature ◽  
Total Conductivity ◽  
Scanning Calorimetry ◽  
Structural Morphology ◽  
Heat Treated ◽  
Different Temperatures

Li2O-Al2O3(La2O3)-TiO2-P2O5 glass-ceramics were fabricated through heat-treatment of the original glass. The differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical workstation were employed to study the structural, morphology and electrical properties of the samples heat-treated at different temperatures. The results showed that: the glass-ceramics consist of the dominating LiTi2(PO4)3 phases, trifle AlPO4, TiO2 and unknown phases. With the heat-treatment temperature increasing from 700 °C to 1100 °C, the structure of glass-ceramic become denser and grain grew, lithium ion conductivity increased quickly and subsequent cut down gradually. While the specimen was obtained by crystallization at 900 °C for 12 h, the total conductivity of glass-ceramic material come up to the maximum (5.85 ×10-4 S•cm-1) at 25 °C. This inorganic solid electrolyte has a potential application in lithium batteries or other devices.

Fabrication of Ferroelectric Bismuth Titanate Glass-Ceramic by Incorporation Method

2008 ◽  
Vol 55-57 ◽  
pp. 461-464 ◽  
Author(s):  
Kamonpan Pengpat
Keyword(s):  
Glass Ceramic ◽  
Bismuth Titanate ◽  
Glass Ceramics ◽  
Steel Plates ◽  
Ceramic Method ◽  
Air Atmosphere ◽  
Treatment Processes ◽  
Heat Treated ◽  
Maximum Dielectric Constant ◽  
Incorporation Method

In this work the fabrication of glass-ceramics containing ferroelectric BIT crystals was carried out by incorporation method. The BIT powder was prepared by conventional ceramic method with calcination temperature of 800°C. In order to prepare bismuth titanate glass ceramic by incorporation method, the BIT powder was mixed with 25 - 95 mol% B2O3 as a glass former. The batches were melted in an air atmosphere using an electric furnace, at 1150°C for 15 minutes. After that, the melts were quenched between the stainless steel plates at room temperature. It was found that crystallization of unexpected Bi2Ti4O11 phase occurred in most of the glass – ceramics with the amount of B2O3 less than 70 mol%. This may cause from the evaporation of Bi2O3 during melting. Besides, glass could only be obtained from the melt of 80 mol% B2O3 batch. In this glass, however, the small amount of TiO2 crystals was detected using SEM technique. The glasses with the amount of B2O3 more than 80% shows severe phase separation and crystallization of TiO2 and B2O3. The glasses of 80 mol% B2O3 composition were subjected to heat – treatment processes at 300 to 500°C. It was found that the crystallization of Bi2Ti4O11 phase occurred at 500°C while at 300°C and 400°C the glasses were still amorphous. The maximum dielectric constant (er) of the heat treated glass ceramics was found in the range of 22 – 30.

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