Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
CERAMIC DIELECTRIC WITH HIGH PERMITTIVITY AND LOW DIELECTRIC LOSS AND PREPARATION METHOD THEREFOR
To provide a polycrystalline ceramic dielectric comprising: crystal grain bulks made of a barium titanate-based ceramic; and a grain diameter comprising interfaces between the crystal grain bulks, while having a grain diameter structure whose composition is controlled using dopants.SOLUTION: By controlling the grain diameter composition using dopants so that the dopants are distributed across a width of 5 nm or less and using a nano-sized, fine-grained barium titanate-based ceramic precursor, the grain diameter structure within the polycrystal may maintain electroneutrality, and their ferroelectricity may be controlled, thereby allowing for smoother polarization reaction. Accordingly, the present invention provides: polycrystalline ceramic dielectrics that have dielectric properties such as high permittivity and low dielectric losses in a wide frequency range, a small amount of reduction in electric field-dependent relative permittivity, high temperature stability, non-reducibility under a reduction sintering condition, and resulting high insulation resistance; and a preparation method therefor.SELECTED DRAWING: Figure 1
【課題】本発明は、チタン酸バリウム土台のセラミックで構成されている結晶粒バルクおよび結晶粒バルクの界面からなる粒径を含み、ドーパントによって組成が制御された粒径の構造を有する多結晶セラミック誘電体を提供する。【解決手段】ドーパントによる５ｎｍ以下の水準の粒径組成の制御およびナノサイズの微粒なチタン酸バリウム土台のセラミック前駆体の使用により、多結晶体内の粒径構造の電気的中性化および強誘電性の調節による円滑な分極反応を現わすことができる。したがって、本発明は、広い周波数領域で高い比誘電率および低い誘電損失の誘電特性、電界による比誘電率の低い変化減少幅、高い温度安全性、還元焼成での非還元性、およびこれによる高い絶縁抵抗を有する多結晶セラミック誘電体およびその製造方法を提供する。【選択図】図１
CERAMIC DIELECTRIC WITH HIGH PERMITTIVITY AND LOW DIELECTRIC LOSS AND PREPARATION METHOD THEREFOR
To provide a polycrystalline ceramic dielectric comprising: crystal grain bulks made of a barium titanate-based ceramic; and a grain diameter comprising interfaces between the crystal grain bulks, while having a grain diameter structure whose composition is controlled using dopants.SOLUTION: By controlling the grain diameter composition using dopants so that the dopants are distributed across a width of 5 nm or less and using a nano-sized, fine-grained barium titanate-based ceramic precursor, the grain diameter structure within the polycrystal may maintain electroneutrality, and their ferroelectricity may be controlled, thereby allowing for smoother polarization reaction. Accordingly, the present invention provides: polycrystalline ceramic dielectrics that have dielectric properties such as high permittivity and low dielectric losses in a wide frequency range, a small amount of reduction in electric field-dependent relative permittivity, high temperature stability, non-reducibility under a reduction sintering condition, and resulting high insulation resistance; and a preparation method therefor.SELECTED DRAWING: Figure 1
【課題】本発明は、チタン酸バリウム土台のセラミックで構成されている結晶粒バルクおよび結晶粒バルクの界面からなる粒径を含み、ドーパントによって組成が制御された粒径の構造を有する多結晶セラミック誘電体を提供する。【解決手段】ドーパントによる５ｎｍ以下の水準の粒径組成の制御およびナノサイズの微粒なチタン酸バリウム土台のセラミック前駆体の使用により、多結晶体内の粒径構造の電気的中性化および強誘電性の調節による円滑な分極反応を現わすことができる。したがって、本発明は、広い周波数領域で高い比誘電率および低い誘電損失の誘電特性、電界による比誘電率の低い変化減少幅、高い温度安全性、還元焼成での非還元性、およびこれによる高い絶縁抵抗を有する多結晶セラミック誘電体およびその製造方法を提供する。【選択図】図１
CERAMIC DIELECTRIC WITH HIGH PERMITTIVITY AND LOW DIELECTRIC LOSS AND PREPARATION METHOD THEREFOR
高誘電率および低誘電損失を有するセラミック誘電体並びにその製造方法
CHUNG SUNG YOON (Autor:in) / AN JI SANG (Autor:in)
09.02.2023
Patent
Elektronische Ressource
Japanisch
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