Preparation method of porous ceramic, porous ceramic, and electronic cigarette

Patent metadata

Field	Value
Publication number	US-9861129-B2
Application number	US-201414414114-A
Country	US
Kind code	B2
Filing date	Jun 16, 2014
Priority date	Jun 16, 2014
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

The present invention relates to a preparation method of a porous ceramic, the porous ceramic, and a use thereof in the electronic cigarette. The method of preparing a porous ceramic includes: mixing amorphous silica, aluminum oxide and iron oxide uniformly to obtain a mixture; sintering the mixture at a temperature of 1000° C. to 1400° C. for 0.5 hour to 3 hours to obtain a precursor; grinding the precursor to obtain precursor powder; mixing the precursor powder, sodium silicate, and porogen uniformly to obtain a premix; mixing and extruding the premix with water to obtain a molded body; and heat preserving the molded body at a temperature of 200° C. to 600° C. for 1 hour to 6 hours, and sintering the molded body at a temperature of 700° C. to 1200° C. for 0.5 hour to 3 hours to obtain the porous ceramic.

First claim

What is claimed is:

1. A method of preparing a porous ceramic, comprising the steps of:
mixing amorphous silica, aluminum oxide, and iron oxide uniformly to obtain a mixture, wherein the amount of the amorphous silica in the mixture is from 80% to 90% by mass, the amount of the aluminum oxide in the mixture is from 1% to 10% by mass, the amount of iron oxide in the mixture is from 1% to 10% by mass;
sintering the mixture at a temperature of 1000° C. to 1400° C. for 0.5 hour to 3 hours to obtain a precursor;
grinding the precursor to obtain a precursor powder;
mixing the precursor powder, sodium silicate, and porogen uniformly to obtain a premix, wherein the amount of the precursor powder in the premix is from 60% to 90% by mass, the amount of sodium silicate in the premix is from 0% to 20% by mass, the amount of porogen in the premix is from 10% to 40% by mass;
mixing and extruding the premix with water to obtain a molded body;
heat preserving the molded body at a temperature of 200° C. to 600° C. for 1 hour to 6 hours; and
sintering the molded body at a temperature of 700° C. to 1200° C. for 0.5 hour to 3 hours to obtain the porous ceramic.

2. The method according to claim 1 , wherein after the precursor is ground, the precursor is passed through a 50-mesh standard sieve to obtain the precursor powder.

3. The method according to claim 1 , wherein the porogen is at least one selected from the group consisting of sucrose, starch, wood fiber, and short carbon fiber.

4. The method according to claim 3 , wherein a particle size of the sucrose and starch ranges from 10 μm to 150 μm; a diameter of the wood fiber and short carbon fiber ranges from 50 μm to 300 μm; a length of the wood fiber and short carbon fiber ranges from 300 μm to 3000 μm.

5. The method according to claim 1 , wherein a mass ratio of the premix and the water is 3:1 to 6:1.

6. The method according to claim 1 , wherein the extruding is performed under a pressure of 0.5 MPa to 20 MPa.

7. The method according to claim 6 , wherein heat preserving the molded body at the temperature of 200° C. to 600° C. further comprises heating the molded body to the temperature of 200° C. to 600° C. with a heating rate of 1° C./min to 10° C./min.

Assignees

• Shenzhen Smoore Technology Ltd
• Hunan Zhengyuan Institute For Energy Storage Mat And Devices

Inventors

• Liu Pingkun
• Zhou Hongming
• Li Jian
• Xia Qinglu

Classifications

• C04B35/14

  based on silica · CPC title

• C04B38/0054

  the pores being microsized or nanosized · CPC title

• C04B2235/3427

  Silicates other than clay, e.g. water glass · CPC title

• C04B2235/3217

  Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina · CPC title

• C04B35/62685

  characterised by the order of addition of constituents or additives · CPC title