Shell and processing method of shell

Patent metadata

Field	Value
Publication number	US-11724968-B2
Application number	US-202016737518-A
Country	US
Kind code	B2
Filing date	Jan 8, 2020
Priority date	Sep 6, 2019
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

A shell and a method for processing the shell are provided. The method includes: coating a sol prepared in advance on an inner surface of a ceramic shell prepared in advance; sintering the ceramic shell coated with the sol by using a sintering process, and forming a transition layer having nano-sized micro-pores on the inner surface of the ceramic shell.

First claim

What is claimed is:

1. A method for processing a shell of a terminal, comprising:
coating an inner surface of a ceramic shell with a sol prepared in advance;
sintering the ceramic shell coated with the sol, to form a transition layer with nano-sized micropores on the inner surface of the ceramic shell; and
connecting the ceramic shell to a plastic part through the transition layer to obtain a target shell,
wherein sintering the ceramic shell coated with the sol comprises:
keeping the ceramic shell coated with the sol in a dust-free environment for a preset time period, and then placing the ceramic shell in a sintering furnace for sintering treatment.

2. The method of claim 1 , wherein the sol comprises any one or a combination of the following elements: Al, Zr, or Zn.

3. The method of claim 1 , wherein the ceramic shell comprises any one or a combination of the following materials: aluminum oxide, zirconium oxide, or zinc oxide.

4. The method of claim 1 , wherein before coating the inner surface of the ceramic shell with the sol prepared in advance, the method further comprises:
adding a sol precursor into water, and obtaining a suspension liquid in a heating reflux manner, wherein a hydrolyzed precipitate is contained in a bottom of the suspension liquid; and
adding a strong acid into the suspension liquid, and obtaining clarified sol in the heating reflux manner.

5. The method of claim 1 , wherein coating the sol prepared in advance on the inner surface of the ceramic shell comprises:
coating the sol prepared in advance on the inner surface of the ceramic shell by using any one or a combination of the following coating methods: dip-coating, casting, spin-coating, and spraying.

6. The method of claim 1 , wherein
a sintering temperature for the sintering treatment ranges from 660 degrees centigrade to 850 degrees centigrade, and a heat preservation time for the sintering treatment is at least 1 hour.

7. The method of claim 1 , wherein connecting the ceramic shell to the plastic part through the transition layer to obtain the target shell comprises:
connecting the ceramic shell to the plastic part through the transition layer by bonding or injection molding to obtain the target shell.

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

• Wang Yukun

Classifications

• A45C11/002

  for storing portable handheld communication devices, e.g. pagers or smart phones · CPC title

• C04B41/009 Primary

  characterised by the material treated · CPC title

• B01J13/0013

  from a precipitate · CPC title

• C04B38/0045

  by a process involving the formation of a sol or a gel, e.g. sol-gel or precipitation processes · CPC title

• C04B38/0051

  characterised by the pore size, pore shape or kind of porosity · CPC title