Effects of titanate coupling agent on the dielectric properties of NiZn ferrite powders–epoxy resin coatings

Chen, Weisheng; Chang, Ya‐Chi; Hsiang, Hsing I.; Hsu, Fu Chi; Yen, Fu‐Su

doi:10.1016/j.ceramint.2011.05.081

Cited by 28 publications

(10 citation statements)

References 11 publications

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“…Thus, an increase in silane coupling agent can effectively prevent agglomeration in fillers due to magnetic interaction, improve interfacial adhesion between filler and matrix, and cause uniform dispersion of magnetite fillers in the epoxy resin. A similar observation was reported by Chen et al [14] based on their study on a titanate coupling agent on NiZn ferrite-epoxy resin coating.…”

Section: Ftir Spectroscopysupporting

confidence: 75%

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Silane treatment of magnetite filler and its effect on the properties of magnetite-filled epoxy thin-film composites

Boon

Mariatti

2014

Polym. Bull.

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Surface modification of magnetite by 3-aminopropyltriethoxysilane coupling agent (3APTES) at different percentages (5, 10, and 20 wt%) with variable treatment times (3, 5, and 7 h) was performed. The effects of these two variables on the properties of magnetite-filled epoxy thin-film composite were investigated. Treated composites exhibited higher saturation magnetization, storage modulus and T g than untreated composites. Increasing 3APTES amount associated with increasing treatment time improved both the interfacial adhesion of magnetite filler matrix and the properties of treated composites. However, using a comparison system at a fixed treatment time, the system treated with a higher concentration of 3APTES exhibited lower saturation magnetization than that treated with a lower concentration. This result can be attributed to the thick coating on the filler surface that acted as a non-magnetic mass to the total sample volume and subsequently reduced the magnetization efficiency.

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Section: Ftir Spectroscopysupporting

confidence: 75%

“…From previous studies [14][15][16], all these parameters were not studied simultaneously and assumed to be independent. To observe the relationship between a coupling agent and treatment time, different concentrations of silane coupling agent with variable treatment times were evaluated in this study.…”

Section: Introductionmentioning

confidence: 99%

Silane treatment of magnetite filler and its effect on the properties of magnetite-filled epoxy thin-film composites

Boon

Mariatti

2014

Polym. Bull.

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“…Hsiang and Tsai 70) investigated the TCA effects on a nonaqueous ferrite (Fe) suspension dispersion and observed that the Ti-O-Fe covalent bond is formed through the interaction of the Ti-O bond in the TCA and Fe-OH onto the surface of ferrite powders. TCAs also altered the ferrite powder surface from hydrophilic to hydrophobic by the interaction of the Ti-O bond of the titanate with the Fe-OH bond, thereby forming a hydrophobic Ti-O-Fe layer on the surface and increasing the adhesion between the hydrophobic resin and ferrite powders 71) .…”

Section: Metal Powdersmentioning

confidence: 99%

Review of titanate coupling agents and their application for dental composite fabrication

et al. 2017

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Silane is a dominant coupler that is widely used in dentistry to promote adhesion among the components of dental composites. Silica-based fillers can be easily silanized because of their similarly ordered structure. However, silane is hydrolytically degraded in the aqueous oral environment and inefficiently bonds to non-silica fillers. Thus, the development of hydrolytically stable dental composites is an important objective in the research on dental materials. Titanate coupling agents (TCAs) exhibit satisfactory interfacial bonding, enhanced homogeneous filler dispersion, and improved mechanical properties of the composites. Titanates also provide superior hydrolytic stability in wet environments, which should be considered in fabricating dental composites. The addition of a small amount of titanates can improve the resistance of the composites to moisture. This paper reviews the effects of the instability of silanes in moisture on the performance of dental composites and presents TCAs as alternative couplers to silanes for fabricating dental composites.

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“…cation located in the octahedral interstices of the network [1]. This material has wide application, ranging from high-density information storage devices, cores of transformers, microwave devices [2], NEM/MEMS [3], magnetic fluids [4], to miniature transformers, multilayer chip inductors (MCIs), high-frequency chips [5], pigments [6], thin films [5,7], gas sensors [8], and others [9,10]. Parameters such as composition, grain size, amount of dopants, impurities, production method, and heating conditions are sensitive in relation to the microstructural properties of Ni-Zn ferrites.…”

Section: Introductionmentioning

confidence: 99%

Rapid calcination of ferrite Ni0.75Zn0.25Fe2O4 by microwave energy

Assis¹,

Bomio²,

Nascimento³

et al. 2014

J Therm Anal Calorim

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Ferrites Ni 0.75 Zn 0.25 Fe 2 O 4 were obtained by polymeric precursor method and calcined in a short time with microwave energy to assess the morphological and microstructural characteristics. Samples were calcined at 500, 650, 800, and 950°C for 30 min in a microwave oven. The resulting powders were characterized by thermal analysis (TG/DSC), X-ray diffraction (XRD), Fourier transform infrared spectrometer, field-emission gun scanning electron microscope (FEG-SEM), and energy-dispersive X-ray spectroscopy. The XRD results showed the formation of single ferrite phase at temperature of 500°C for 30 min. The FEG-SEM analysis showed agglomerated particles with formation of non-dense longitudinal plates, with interparticle porosity and agglomerated fine particles. The rapid calcination by microwave energy demonstrated satisfactory results in relatively low temperature of 500°C for 30 min and appeared to be a promising technique for obtaining nickel-zinc ferrite powders.

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Effects of titanate coupling agent on the dielectric properties of NiZn ferrite powders–epoxy resin coatings

Cited by 28 publications

References 11 publications

Silane treatment of magnetite filler and its effect on the properties of magnetite-filled epoxy thin-film composites

Silane treatment of magnetite filler and its effect on the properties of magnetite-filled epoxy thin-film composites

Review of titanate coupling agents and their application for dental composite fabrication

Rapid calcination of ferrite Ni0.75Zn0.25Fe2O4 by microwave energy

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