Golden ceramic, method for preparing same and ceramic housing
A golden ceramic includes: a ceramic matrix in a weight percentage of 80-99% and a colorant in a weight percentage of 1-20%, wherein the ceramic matrix includes zirconium oxide and yttrium oxide, and the colorant includes zirconium nitride.
1. A method for preparing a golden ceramic, comprising:
molding an oxide powder raw material to obtain a molded body;
debinding and sintering the molded body; and
subjecting the sintered body to reduction-nitridation reaction in an atmosphere of a reactant gas to obtain the golden ceramic, the reaction gas containing nitrogen, wherein the reduction-nitridation reaction has a reaction temperature of 1300-1600° C., with a holding time of 30-180 min,
wherein the oxide powder raw material comprises:
85-96 wt % of zirconium oxide, 2.0-4.5 wt % of yttrium oxide, 0-2.0 wt % of hafnium oxide, 0-2.0 wt % of titanium oxide, 0-1.0 wt % of vanadium oxide, 0-5.0 wt % of praseodymium oxide, and 0-0.5 wt % of iron oxide.
2. The method according to claim 1 , wherein the reaction gas is a mixed gas of nitrogen and hydrogen, or the reaction gas is a mixed gas of nitrogen and carbon monoxide.
3. The method according to claim 2 , wherein a molar ratio of the nitrogen to the hydrogen is 99-80:1-20 in the mixed gas of nitrogen and hydrogen; or
a molar ratio of the nitrogen to the carbon monoxide is 99-99.9:0.1-1 in the mixed gas of nitrogen and carbon monoxide.
4. The method according to claim 1 , wherein powder in the oxide powder raw material has a particle size distribution D50 of 0.2-0.5 μm, and a specific surface area of 8-12 m2/g.
5. The method according to claim 1 , wherein the molding is dry pressing, isostatic pressing, tape casting, or injection molding.
6. The method according to claim 1 , wherein the debinding and sintering the molded body comprises: placing the molded body in a sintering furnace; gradually heating the body to 550° C. in 15-30 hr; then heating the body to a temperature of 1350-1450° C. in 5-10 hr; and holding the temperature of 1350-1450° C. for 1-4 hr.
7. A golden ceramic prepared by the method according to claim 1 .
8. A ceramic housing composed of the golden ceramic according to claim 7 .
9. The method according to claim 1 , wherein the oxide powder raw material comprises: 1.0-2.0 wt % of hafnium oxide.
10. The method according to claim 1 , wherein the oxide powder raw material comprises: 0.2-2.0 wt % of titanium oxide.
11. The method according to claim 1 , wherein the oxide powder raw material comprises:
hafnium oxide which is greater than 0 and is less than or equal to 2.0 wt %;
titanium oxide which is greater than 0 and is less than or equal to 2.0 wt %;
vanadium oxide which is greater than 0 and is less than or equal to 1.0 wt %;
praseodymium oxide which is greater than 0 and is less than or equal to 5.0 wt %;
iron oxide which is greater than 0 and is less than or equal to 0.5 wt %.