Dielectric inorganic composition

Patent metadata

Field	Value
Publication number	US-12312239-B2
Application number	US-202017601929-A
Country	US
Kind code	B2
Filing date	Mar 23, 2020
Priority date	Apr 8, 2019
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

Provided is a dielectric body having a high dielectric constant and a change rate of the dielectric constant of 30% or less, in a temperature range from −50° C. to 350° C. An inorganic substance contains an oxide crystal including A and M (the A being one or more of P, Ge, and V, and the M being one or more of Nb and Ta), in which the dielectric constant is 500 or more. In the inorganic substance, the oxide crystal is one or more of PNb9O25, P2.5Nb18O50, GeNb9O25, GeNb18O47, GeNb19.144O50, VNb9O25, VNb9O24.9, PTa9O25, GeTa9O25, VTa9O25, and solid solutions thereof.

First claim

What is claimed is:

1. An inorganic substance containing an oxide crystal including A and M (the A being one or more of P, Ge, and V, and the M being one or more of Nb and Ta),
wherein a molar ratio of the A and the M is in a range from 0.01 to 1.00, and a dielectric constant is 500 or more;
wherein a change rate of the dielectric constant relative to a temperature range from −50° C. to 350° C. is 30% or less.

2. An inorganic substance containing an oxide crystal including A and M (the A being one or more of P, Ge, and V, and the M being one or more of Nb and Ta), wherein a molar ratio of the A and the M is in a range from 0.01 to 1.00, and a dielectric constant is 500 or more;
wherein the oxide crystal is one or more of PNb 9 O 25 , P 2.5 Nb 18 O 50 , GeNb 9 O 25 , GeNb 18 O 47 , GeNb 19.144 O 50 , VNb 9 O 25 , VNb 9 O 24.9 , PTa 9 O 25 , GeTa 9 O 25 , VTa 9 O 25 , and solid solutions thereof.

3. A dielectric body including the inorganic substance according to claim 1 .

4. The dielectric body according to claim 3 , wherein the dielectric body is a ferroelectric body.

5. A condenser including the dielectric body according to claim 3 .

6. A condenser including the dielectric body according to claim 4 .

Assignees

• Ohara Kk

Inventors

• Fu Jie

Classifications

• H01G4/30

  Stacked capacitors (H01G4/33 takes precedence) · CPC title

• H01G4/1254

  based on niobium or tungsteen, tantalum oxides or niobates, tantalates · CPC title

• C01P2006/40

  Electric properties · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• H01G7/06

  having a dielectric selected for the variation of its permittivity with applied voltage, i.e. ferroelectric capacitors (electrets H01G7/02) · CPC title