Ceramic shell, mobile terminal and method for manufacturing ceramic shell

Patent metadata

Field	Value
Publication number	US-11679580-B2
Application number	US-201916390036-A
Country	US
Kind code	B2
Filing date	Apr 22, 2019
Priority date	Apr 24, 2018
Publication date	Jun 20, 2023
Grant date	Jun 20, 2023

Abstract

The disclosure relates to a ceramic shell, a mobile terminal and a method for manufacturing the ceramic shell. The ceramic shell includes a multi-layer ceramic blank sheet including a plurality of alternately overlapped ceramic blank sheets having at least one white ceramic blank sheet overlapped with at least one color ceramic blank sheet, wherein two of the plurality of alternately overlapped ceramic blank sheets on an outermost side of the multi-layer ceramic blank sheet are both white ceramic blank sheets.

First claim

What is claimed is:

1. A ceramic shell comprising:
a multi-layer ceramic blank sheet including a plurality of alternately overlapped ceramic blank sheets having at least one white ceramic blank sheet overlapped with at least one color ceramic blank sheet,
wherein two of the plurality of alternately overlapped ceramic blank sheets on an outermost side of the multi-layer ceramic blank sheet are both white ceramic blank sheets,
wherein the white ceramic blank sheet includes at least one white membrane band, the white membrane band is formed with a white tape casting slurry by a white tape casting slurry process, the white tap casting slurry comprises white powder that the white powder comprises white zirconium oxide of 93%˜97% by weight, yttrium oxide of 3.0%˜5.5% by weight and aluminum oxide of 0.25%˜10% by weight, and the total weight of the white zirconium oxide, the yttrium oxide and the aluminum oxide in the white powder is no less than 99.5%, and
wherein the color ceramic blank sheet includes at least one color membrane band, the color membrane band is formed with a color tape casting slurry by a color tape casting slurry process, the color tap casting slurry comprises color powder that the color powder comprises white zirconium oxide of 87%˜98.5% by weight, yttrium oxide 0.8%˜5% by weight, aluminum oxide of 0.25%˜10% by weight and colorant of 0.5%˜8% by weight, and the total weight of the white zirconium oxide, the yttrium oxide, the aluminum oxide and the colorant in the color powder is no less than 99.5%.

2. The ceramic shell according to claim 1 , wherein each of the two ceramic blank sheets on the outermost side of the multi-layer ceramic blank sheet has a thickness ranging from 0.3 to 0.5 mm.

3. The ceramic shell according to claim 2 , wherein the two ceramic blank sheets on the outermost side of the multi-layer ceramic blank sheet have the same thickness.

4. The ceramic shell according to claim 1 , wherein the white membrane band has a thickness ranging from 1 to 500 μm.

5. The ceramic shell according to claim 2 , wherein the white ceramic blank sheet includes at least one white membrane band that has a thickness ranging from 1 to 500 μm.

6. The ceramic shell according to claim 3 , wherein the white ceramic blank sheet includes at least one white membrane band that has a thickness ranging from 1 to 500 μm.

7. The ceramic shell according to claim 1 , wherein both the color ceramic blank sheet and the white ceramic blank sheet between any two color ceramic blank sheets have a thickness ranging from 0.001 to 0.3 mm.

8. The ceramic shell according to claim 1 , wherein the color membrane band has a thickness ranging from 1 to 500 μm.

9. The ceramic shell according to claim 7 , wherein the color ceramic blank sheet includes at least one color membrane band that has a thickness ranging from 1 to 500 μm.

10. A mobile terminal, comprising:
a ceramic shell including a multi-layer ceramic blank sheet that includes a plurality of alternately overlapped ceramic blank sheets having at least one white ceramic blank sheet overlapped with at least one color ceramic blank sheet,
wherein two of the plurality of alternately overlapped ceramic blank sheets on an outermost side of the multi-layer ceramic blank sheet are both white ceramic blank sheets,
wherein the white ceramic blank sheet includes at least one white membrane band, the white membrane band is formed with a white tape casting slurry by a white tape casting slurry process, the white tap casting slurry comprises white powder that the white powder comprises white zirconium oxide of 93%˜97% by weight, yttrium oxide of 3.0%˜5.5% by weight and aluminum oxide of 0.25%˜10% by weight, and the total weight of the white zirconium oxide, the yttrium oxide and the aluminum oxide in the white powder is no less than 99.5%,
wherein the color ceramic blank sheet includes at least one color membrane band, the color membrane band is formed with a color tape casting slurry by a color tape casting slurry process, the color tap casting slurry comprises color powder that the color powder comprises white zirconium oxide of 87%˜98.5% by weight, yttrium oxide 0.8%˜5% by weight, aluminum oxide of 0.25%˜10% by weight and colorant of 0.5%˜8% by weight, and the total weight of the white zirconium oxide, the yttrium oxide, the aluminum oxide and the colorant in the color powder is no less than 99.5%.

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

• Liu Jihong
• Wang Jinlong

Classifications

• C04B2237/066

  based on rare earth oxides · CPC title

• B32B18/00 Primary

  Layered products essentially comprising ceramics, e.g. refractory products · CPC title

• C04B2237/704

  of one or more of the ceramic layers or articles · CPC title

• C04B2235/9661

  Colour · CPC title

• C04B2237/00

  Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating · CPC title