Multi-phase high thermal conductivity composite dielectric materials

Patent metadata

Field	Value
Publication number	US-10246375-B2
Application number	US-201715470613-A
Country	US
Kind code	B2
Filing date	Mar 27, 2017
Priority date	Mar 30, 2016
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

Disclosed herein are embodiments of materials having high thermal conductivity along with a high dielectric constants. In some embodiments, a two phase composite ceramic material can be formed having a contiguous aluminum oxide phase with a secondary phase embedded within the continuous phase. Example secondary phases include calcium titanate, strontium titanate, or titanium dioxide.

First claim

What is claimed is:

1. A multi-phase composite ceramic material, the material comprising:
a primary phase of aluminum oxide;
a first secondary phase of CaTiO 3 located within the primary phase; and
a second secondary phase of LaAlO 3 located within the primary phase, the first secondary phase and the second secondary phase forming a multi-phase composite, the multi-phase composite having a dielectric constant of greater than 20 and a thermal conductivity of greater than 20 W·m −1 ·K −1 .

2. The multi-phase composite ceramic material of claim 1 wherein the primary phase is generally contiguous.

3. The multi-phase composite ceramic material of claim 1 wherein the multi-phase composite has a dielectric constant of greater than 25.

4. The multi-phase composite ceramic material of claim 1 wherein the thermal conductivity is greater than 30 W·m −1 ·K −1 .

5. The multi-phase composite ceramic material of claim 1 wherein the multi-phase composite has a temperature drift of resonant frequency lower than 1000 ppm/Degree C.

6. A multi-phase composite ceramic material, the material comprising:
an aluminum oxide phase;
a first secondary phase of CaTiO 3 located within the aluminum oxide phase; and
a second secondary phase of La 2 MgTiO 6 located within the aluminum oxide phase forming a multi-phase composite, the multi-phase composite having a dielectric constant of greater than 20 and a thermal conductivity of greater than 30 W·m −1 ·K −1 .

7. A multi-phase composite ceramic material comprising at a generally contiguous primary phase of aluminum oxide and a plurality of secondary phases, a first of the plurality of secondary phases being CaTiO 3 and a second of the plurality of secondary phases being selected from the group consisting of LaAlO 3 , La 2 MgTiO 6 , YAlO 3 , SmAlO 3 , Mg 4 Nb 2 O 9 , and La 4 Ti 3 O 12 , the plurality of secondary phases embedded within the primary phase to form a multi-phase composite ceramic material having a dielectric constant of greater than 20.

8. The multi-phase composite ceramic material of claim 7 wherein the multi-phase composite ceramic material has a thermal conductivity of greater than 20 W·m −1 ·K −1 .

9. The multi-phase composite ceramic material of claim 6 wherein the aluminum oxide phase is generally contiguous.

10. The multi-phase composite ceramic material of claim 6 wherein the multi-phase composite ceramic material has a dielectric constant of greater than 25.

11. The multi-phase composite ceramic material of claim 6 wherein the multi-phase composite ceramic material has a dielectric constant of greater than 35.

12. The multi-phase composite ceramic material of claim 6 wherein the multi-phase composite ceramic material has a temperature drift of resonant frequency lower than 1000 ppm/Degree C.

13. The multi-phase composite ceramic material of claim 7 wherein the multi-phase composite ceramic material has a thermal conductivity of greater than 30 W·m −1 ·K −1 .

14. The multi-phase composite ceramic material of claim 7 wherein the primary phase is contiguous.

15. The multi-phase composite ceramic material of claim 7 wherein the multi-phase composite ceramic material has a dielectric constant of greater than 25.

16. The multi-phase composite ceramic material of claim 1 wherein the multi-phase composite ceramic material has a dielectric constant of greater than 35.

17. The multi-phase composite ceramic material of claim 1 further including Mg 4 Nb 2 O 9 .

18. The multi-phase composite ceramic material of claim 1 further including La 4 Ti 3 O 12 .

19. The multi-phase composite ceramic material of claim 7 wherein the ceramic material includes YAlO 3 .

20. The multi-phase composite ceramic material of claim 7 wherein the ceramic material includes SmAlO 3 .

Assignees

• Skyworks Solutions Inc

Inventors

• Hill Michael David

Classifications

• C04B2235/9607

  Thermal properties, e.g. thermal expansion coefficient · CPC title

• C04B2235/3224

  Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide · CPC title

• C04B2235/3206

  Magnesium oxides or oxide-forming salts thereof · CPC title

• C04B2235/3225

  Yttrium oxide or oxide-forming salts thereof · CPC title

• C04B2235/3236

  Alkaline earth titanates · CPC title