Disclosed are embodiments of tungsten bronze crystal structures that can have both a high dielectric constant and low temperature coefficient, making them advantageous for applications that experience temperature changes and gradients. In particular, tantalum can be substituted into the crystal structure to improve properties. Embodiments of the material can be useful for radiofrequency applications such as resonators and antennas.

A convenient and versatile method for preparing complex metal oxides is disclosed. The method uses a low temperature, environmentally friendly gel-collection method to form a single phase nanomaterial. In one embodiment, the nanomaterial consists of Ba.sub.AMn.sub.BTi.sub.CO.sub.D in a controlled stoichiometry.

A dielectric composition comprising a main component expressed by a chemical formula of (A.sub.6-xB.sub.xC.sub.x+2D.sub.8-xO.sub.30, 0x5), wherein said A component is at least one element selected form the group consisting of Ba, Ca, and Sr, said B component is at least one element selected from the group consisting of Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, said C component is at least one element selected from the group consisting of Ti, and Zr, said D component is at least one element selected from the group consisting of Nb, and Ta, and said dielectric composition comprises 2.50 mol or more and 20.00 mol or less of an oxide of Ge as a first sub component with respect to 100 mol of said main component.

Loss tangents in microwave dielectric materials may be modified (increased and/or reduced), particularly at cryogenic temperatures, via application of external magnetic fields. Exemplary electrical devices, such as resonators, filters, amplifiers, mixers, and photonic detectors, configured with dielectric components having applied magnetic fields may achieve improvements in quality factor and/or modifications in loss tangent exceeding two orders of magnitude.

Disclosed are methods of forming a dielectric material. One method comprises modifying a tungsten bronze crystal structure by substituting one or more lattice sites with one or more elements selected to increase a quality factor (Q) of the dielectric material.

A dielectric ceramic composition contains a first main ingredient of BaTiO.sub.3 and a second main ingredient of BaTi.sub.2O.sub.5, and a base material powder containing the first and second main ingredients is represented by (1x)BaTiO.sub.3xBaTi.sub.2O.sub.5 and x satisfies 0.1x0.8. The dielectric ceramic composition may include additional accessory ingredients, and may be used to form ceramic sheets having internal electrodes of a multilayer ceramic capacitor disposed thereon.

Loss tangents in microwave dielectric materials may be modified (increased and/or reduced), particularly at cryogenic temperatures, via application of external magnetic fields. Exemplary electrical devices, such as resonators, filters, amplifiers, mixers, and photonic detectors, configured with dielectric components having applied magnetic fields may achieve improvements in quality factor and/or modifications in loss tangent exceeding two orders of magnitude.

Disclosed are embodiments of tungsten bronze crystal structures that can have both a high dielectric constant and low temperature coefficient, making them advantageous for applications that experience temperature changes and gradients. In particular, tantalum can be substituted into the crystal structure to improve properties. Embodiments of the material can be useful for radiofrequency applications such as resonators and antennas.

A ceramic electronic component includes a dielectric layer and an electrode layer. The dielectric layer contains a plurality of ceramic particles and grain boundary phases present therebetween. A main component of the ceramic particles is barium titanate. An average thickness of the grain boundary phases is 1.0 nm or more. A thickness variation of the grain boundary phases is 0.1 nm or less.

A dielectric ceramic composition contains a first main ingredient of BaTiO.sub.3 and a second main ingredient of BaTi.sub.2O.sub.5, and a base material powder containing the first and second main ingredients is represented by (1-x)BaTiO.sub.3-xBaTi.sub.2O.sub.5 and x satisfies 0.1x0.8. The dielectric ceramic composition may include additional accessory ingredients, and may be used to form ceramic sheets having internal electrodes of a multilayer ceramic capacitor disposed thereon.