Electrical and Magnetic Behavior of Ultrafine-Grain Ceramics

The effects of Dy doping and sintering parameters on the properties of BaTiO3 ceramics were studied. The average grain size decreases with increasing Dy content and is controlled at ∼1.5 μ m by 0.8 at.% Dy. The Curie temperature change, associated with ≤1.2 at.% Dy, is <3°C. The dielectric constant is ∼2600 for specimens doped with 0.8 at.% Dy, calcined at 1200°C, and sintered at 1450°C. The dielectric constant variation with ambient temperature is much less than that of conventional BaTiO3 ceramics. Lattice constant c decreases with increasing Dy concentration whereas a increases slightly. The effects of grain size on dielectric constant, lattice parameters, and linear thermal expansion coefficient are more pronounced than the chemical effects of Dy doping in the ferroelectric state, whereas in the paraelectric state, these characteristics are almost independent of grain size as well as Dy concentration. The decrease in the frequency of occurrence of 90° twins with decreasing grain size implies that internal stress, which develops when BaTiO3 ceramics are cooled below Tc, strongly influences the effects of grain size.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Electrical and Magnetic Behavior of Ultrafine-Grain Ceramics

Cited by 4 publications

References 15 publications

Characteristics of porous BaTiO3-based PTC thermistors fabricated by adding graphite powders

Characteristics of porous BaTiO3-based PTC thermistors fabricated by adding graphite powders

Origin of ferroelectricity in perovskites: The principal problems from a theoretical perspective

Preparation, Characterization, and Properties of Dy‐Doped Small‐Grained BaTiO₃ Ceramics

Contact Info

Product

Resources

About

Electrical and Magnetic Behavior of Ultrafine-Grain Ceramics

Cited by 4 publications

References 15 publications

Characteristics of porous BaTiO3-based PTC thermistors fabricated by adding graphite powders

Characteristics of porous BaTiO3-based PTC thermistors fabricated by adding graphite powders

Origin of ferroelectricity in perovskites: The principal problems from a theoretical perspective

Preparation, Characterization, and Properties of Dy‐Doped Small‐Grained BaTiO3 Ceramics

Contact Info

Product

Resources

About

Preparation, Characterization, and Properties of Dy‐Doped Small‐Grained BaTiO₃ Ceramics