Ceramic article and method for producing same

Patent metadata

Field	Value
Publication number	US-10343952-B2
Application number	US-201715819386-A
Country	US
Kind code	B2
Filing date	Nov 21, 2017
Priority date	Nov 24, 2016
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

A ceramic article in the form of a sanitary, culinary or laboratory article, comprising a ceramic base body and also a fired glaze applied on said base body, the fired glaze comprising SiO2 at 45-55 mass %, Al2O3 at 6-12 mass %, ZnO at 15-35 mass %, and additionally PbO at 0.1-15 mass % and/or CuO at 0.025-2 mass % and/or Bi2O3 at 0.25-7 mass %.

First claim

We claim:

1. A ceramic article in the form of a sanitary, culinary or laboratory article, comprising a ceramic base body and also a fired glaze applied on said base body, the fired glaze comprising SiO 2 at 45-55 mass %, Al 2 O 3 at 6-12 mass %, ZnO at 15-35 mass %, and additionally PbO at 0.1-15 mass % and/or CuO at 0.025-2 mass % and/or Bi 2 O 3 at 0.25-7 mass %, wherein the ZnO combined with the PbO and/or CuO and/or Bi 2 O 3 are in amounts that provide enhanced antimicrobial characteristics compared to antimicrobial characteristics of ZnO alone.

2. The ceramic article according to claim 1 , wherein the PbO content is between 0.5-12 mass % and/or the CuO content is between 0.05-1.5 mass % and/or the Bi 2 O 3 content is between 0.35-6 mass %.

3. The ceramic article according to claim 2 , wherein the PbO content is between 0.75-10 mass % and/or the CuO content is between 0.075-1.25 mass % and/or the Bi 2 O 3 content is between 0.5-5 mass %.

4. The ceramic article according to claim 3 , wherein the PbO content is between 1-8 mass % and/or the CuO content is between 0.1-1 mass %.

5. The ceramic article according to claim 1 , wherein either both PbO and CuO, but not Bi 2 O 3 , or Bi 2 O 3 , but not PbO and CuO, are included.

6. The ceramic article according to claim 1 , wherein the ZnO content is between 18-32 mass %.

7. The ceramic article according to claim 6 , wherein the ZnO content is between 20-30 mass %.

8. The ceramic article according to claim 7 , wherein the ZnO content is between 22-28 mass %.

9. The ceramic article according to claim 1 , wherein the glaze has a layer thickness between 0.1-3 mm.

10. The ceramic article according to claim 9 , wherein the layer thickness is between 0.5-1 mm.

11. A ceramic article in the form of a sanitary, culinary or laboratory article, comprising a ceramic base body and also a fired glaze applied on said base body, the fired glaze comprising SiO 2 at 45-55 mass %, Al 2 O 3 at 6-12 mass %, ZnO at 15-35 mass %, and additionally Bi 2 O 3 at 0.25-7 mass %.

12. A method for producing a ceramic article according to claim 1 , comprising the following steps:
providing a ceramic base body which is unfired or has undergone preliminary firing,
applying a glaze coating using a slip comprising a lead frit containing at least 80 mass % of PbO, at 0.12-18 mass % and/or CuO powder at 0.025-2 mass % and/or Bi 2 O 3 powder at 0.25-7 mass %, wherein the ZnO combined with the PbO and/or CuO and/or Bi 2 O 3 are in amounts that provide enhanced antimicrobial characteristics compared to antimicrobial characteristics of ZnO alone, and
carrying out firing to form a fired glaze at a temperature of 1100-1350° C.

13. The method according to claim 12 , wherein a slip comprising lead frit at 0.6-14.4 mass % and/or CuO powder at 0.05-1.5 mass % and/or Bi 2 O 3 powder at 0.35-6 mass % is used.

14. The method according to claim 13 , wherein a slip comprising lead frit at 0.9-12 mass % and/or CuO powder at 0.075-1.25 mass % and/or Bi 2 O 3 powder at 0.5-5 mass % is used.

15. The method according to claim 14 , wherein a slip comprising lead frit at 0.12-9.6 mass % and/or CuO powder at 0.1-1 mass % is used.

16. The method according to claim 12 , wherein a slip is used in which either both PbO and CuO, but not Bi 2 O 3 , or Bi2O3, but not PbO and CuO, are included.

17. The method according to claim 12 , wherein a slip comprising ZnO at 18-32 mass % is used.

18. The method according to claim 17 , wherein a slip comprising ZnO at 20-30 mass % is used.

19. The method according to claim 18 , wherein a slip comprising ZnO at 22-28 mass % is used.

20. The method according to claim 12 , wherein the glaze coating is applied with a layer thickness between 0.1-3 mm.

21. The method according to claim 20 , wherein the layer thickness is between 0.5-1 mm.

22. The method according to claim 12 , wherein the glaze coating is applied in a printing, more particularly screen printing, casting, injecting, spraying, spreading or dipping process or in a combination of at least two of the stated processes.

Assignees

• Duravit Ag

Inventors

• Latief Othmar
• Sander Sebastian
• Stammel Thomas

Classifications

• C04B2111/2092

  Resistance against biological degradation · CPC title

• C03C3/108

  containing boron · CPC title

• C04B41/5022

  with vitreous materials (composition of vitreous glazes and enamels C03C; ceramic pigments C09C1/0009) · CPC title

• C03C2204/02

  Antibacterial glass, glaze or enamel · CPC title

• C03C8/20 Primary

  containing titanium compounds; containing zirconium compounds · CPC title