Glass-ceramic-ferrite composition and electronic component

Patent metadata

Field	Value
Publication number	US-2019161398-A1
Application number	US-201816186253-A
Country	US
Kind code	A1
Filing date	Nov 9, 2018
Priority date	Nov 29, 2017
Publication date	May 30, 2019
Grant date	—

Abstract

A glass-ceramic-ferrite composition contains glass, a ceramic filler, and Ni—Zn—Cu ferrite. The glass contains about 0.5% by weight or more of R2O, where R is at least one selected from the group consisting of Li, Na, and K; about 5.0% by weight or less of Al2O3; about 10.0% by weight or more of B2O3; and about 85.0% by weight or less of SiO2 on the basis of the weight of the glass. The Ni—Zn—Cu ferrite accounts for about 58% to 64% by weight of the glass-ceramic-ferrite composition. The ceramic filler contains quartz and, in some cases, forsterite. The quartz accounts for about 4% to 13% by weight of the glass-ceramic-ferrite composition. The forsterite accounts for about 6% by weight or less of the glass-ceramic-ferrite composition.

First claim

What is claimed is:

1 . A glass-ceramic-ferrite composition containing:
glass; a ceramic filler; and Ni—Zn—Cu ferrite, the glass-ceramic-ferrite composition having a peak corresponding to the (511) plane of a magnetite phase in an X-ray diffraction pattern determined using a Cu Kα radiation, the full width at half maximum of the peak being about 0.38° to 0.56°, wherein the glass contains about 0.5% by weight or more of R 2 O, where R is at least one selected from the group consisting of Li, Na, and K; about 5.0% by weight or less of Al 2 O 3 ; about 10.0% by weight or more of B 2 O 3 ; and about 85.0% by weight or less of SiO 2 on the basis of the weight of the glass, the Ni—Zn—Cu ferrite accounts for about 58% to 64% by weight of the glass-ceramic-ferrite composition, the ceramic filler contains quartz and, in some cases, forsterite, the quartz accounts for about 4% to 13% by weight of the glass-ceramic-ferrite composition, and the forsterite accounts for about 6% by weight or less of the glass-ceramic-ferrite composition.

2 . The glass-ceramic-ferrite composition according to claim 1 , wherein the glass contains about 5.0% by weight or less of R 2 O on the basis of the weight of the glass.

3 . The glass-ceramic-ferrite composition according to claim 1 , wherein the glass contains about 25.0% by weight or less of B 2 O 3 on the basis of the weight of the glass.

4 . The glass-ceramic-ferrite composition according to claim 1 , wherein the glass contains about 70.0% by weight or more of SiO 2 on the basis of the weight of the glass.

5 . A glass-ceramic-ferrite composition containing: glass;
a ceramic filler; and Ni—Zn—Cu ferrite, the glass-ceramic-ferrite composition having a peak corresponding to the (511) plane of a magnetite phase in an X-ray diffraction pattern determined using a Cu Kα radiation, the full width at half maximum of the peak being about 0.38° to 0.56°, wherein the glass is borosilicate glass containing R, where R is at least one selected from the group consisting of Li, Na, and K, and, in some cases, Al and contains about 0.5% by weight or more of R in terms of R 2 O, about 2.6% by weight or less of Al, about 3.1% by weight or more of B, and about 39.7% by weight or less of Si on the basis of the weight of the glass; the Ni—Zn—Cu ferrite accounts for about 58% to 64% by weight of the glass-ceramic-ferrite composition; the ceramic filler contains quartz and, in some cases, forsterite; the quartz accounts for about 4% to 13% by weight of the glass-ceramic-ferrite composition; and the forsterite accounts for about 6% by weight or less of the glass-ceramic-ferrite composition.

6 . The glass-ceramic-ferrite composition according to claim 5 , wherein the glass contains about 5.0% by weight or less of R in terms of R 2 O on the basis of the weight of the glass.

7 . The glass-ceramic-ferrite composition according to claim 5 , wherein the glass contains about 7.8% by weight or less of B on the basis of the weight of the glass.

8 . The glass-ceramic-ferrite composition according to claim 5 , wherein the glass contains about 32.7% by weight or more of Si on the basis of the weight of the glass.

9 . The glass-ceramic-ferrite composition according to claim 1 , wherein the content of the forsterite in the glass-ceramic-ferrite composition is 1% by weight or more.

10 . The glass-ceramic-ferrite composition according to claim 1 , wherein the sum of the contents of the Ni—Zn—Cu ferrite and ceramic filler in the glass-ceramic-ferrite composition is preferably about 80% by weight or less.

11 . The glass-ceramic-ferrite composition according to claim 10 , wherein the sum of the contents of the Ni—Zn—Cu ferrite and ceramic filler in the glass-ceramic-ferrite composition is more preferably about 74% by weight or less.

12 . The glass-ceramic-ferrite composition according to claim 1 , wherein the sum of the contents of the Ni—Zn—Cu ferrite and ceramic filler in the glass-ceramic-ferrite composition is preferably about 65% by weight or more.

13 . The glass-ceramic-ferrite composition according to claim 1 , wherein the porosity of the glass-ceramic-ferrite composition is about 7% or less.

14 . An electronic component comprising:
an element body containing the glass-ceramic-ferrite composition according to claim 1 ; and an inner conductor placed in the element body.

15 . The electronic component according to claim 14 , wherein the inner conductor contains Ag.

16 . A method for producing a glass-ceramic-ferrite composition having a peak corresponding to the (511) plane of a magnetite phase in an X-ray diffraction pattern determined using a Cu Kα radiation, the full width at half maximum of the peak being about 0.38° to 0.56°, the method comprising:
preparing a mixture containing glass, a ceramic filler, and Ni—Zn—Cu ferrite; and
firing the mixture to obtain the glass-ceramic-ferrite composition,
wherein the glass contains about 0.5% by weight or more of R 2 O, where R is at least one selected from the group consisting of Li, Na, and K; about 5.0% by weight or less of Al 2 O 3 ; about 10.0% by weight or more of B 2 O 3 ; and about 85.0% by weight or less of SiO 2 on the basis of the weight of the glass, the Ni—Zn—Cu ferrite accounts for about 58% to 64% by weight of the mixture, the ceramic filler contains quartz and, in some cases, forsterite, the quartz accounts for about 4% to 13% by weight of the mixture, and the forsterite accounts for about 6% by weight or less of the mixture.

17 . The method according to claim 16 , wherein the mixture is fired at a temperature of about 880° C. to 920° C.

18 . A method for manufacturing an electronic component which includes an element body containing a glass-ceramic-ferrite composition and an inner conductor placed in the element body and which has a peak corresponding to the (511) plane of a magnetite phase in an X-ray diffraction pattern determined using a Cu Kα radiation, the full width at half maximum of the peak being about 0.38° to 0.56°, the method comprising:
preparing a mixture containing glass, a ceramic filler, and Ni—Zn—Cu ferrite;
forming the mixture into sheets;
forming a conductive pattern on the sheets using a conductive paste;
stacking the sheets provided with the conductive pattern to form a multilayer body; and
firing the multilayer body to obtain the electronic component, which includes the element body containing the glass-ceramic-ferrite composition and the inner conductor placed in the element body,
wherein the glass contains about 0.5% by weight or more of R 2 O, where R is at least one selected from the group consisting of Li, Na, and K; about 5.0% by weight or less of Al 2 O 3 ; about 10.0% by weight or more of B 2 O 3 ; and about 85.0% by weight or less of SiO 2 on the basis of the weight of the glass, the Ni—Zn—Cu ferrite accounts for about 58% to 64% by weight of the mixture, the ceramic filler contains quartz and, in some cases, forsterite, the quartz accounts for about 4% to 13% by weight of the mixture, and the forsterite accounts for about 6% by weight or less of the mixture.

19 . The method according to claim 18 , wherein the mixture is fired at a temperature of about 880° C. to 920° C.

20 . The method according to claim 18 , wherein the conductive paste contains Ag.

Assignees

• Murata Manufacturing Co

Inventors

• Kaneko Kazuhiro

Classifications

• C04B2235/80

  Phases present in the sintered or melt-cast ceramic products other than the main phase · CPC title

• C03C3/091

  containing aluminium · CPC title

• C03C3/089 Primary

  containing boron · CPC title

• C04B2235/96

  Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance · CPC title

• C04B2235/6584

  at an oxygen percentage below that of air · CPC title