Open-pore sintered glasses for use in electronic cigarettes

Patent metadata

Field	Value
Publication number	US-11078108-B2
Application number	US-201815893584-A
Country	US
Kind code	B2
Filing date	Feb 10, 2018
Priority date	Aug 10, 2015
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

Abstract

A sintered body for use as a liquid reservoir in an electronic cigarette, medication administering devices, in thermally heated evaporators for fragrant substances is provided. The sintered body is made of open-pore sintered glass and has a porosity of greater than 50 vol %. The average pore size is in a range from 1 to 450 μm. The glass of the sintered body has a transition temperature T g of at least 450° C.

First claim

What is claimed is:

1. A sintered body for use as a liquid reservoir, comprising an open-pore sintered glass having a porosity of >50 vol % and an average pore size in a range from 90 to 450 μm, wherein the open-pore sintered glass comprises glass having a transition temperature of at least 450° C., wherein the open-pore sintered glass has a specific surface area that is at least 0.8 m 2 /g and smaller than 20 m 2 /g.

2. The sintered body as claimed in claim 1 , wherein the open-pore sintered glass is configured for a use selected from the group consisting of an electronic cigarette, a medication administering device, and a thermally heated evaporator for a fragrant substance.

3. The sintered body as claimed in claim 1 , wherein the open-pore sintered glass has a mass and adsorbs propylene glycol in an amount of at least 50% of the mass at a temperature of 20° C. and in an adsorption time of 3 hours.

4. The sintered body as claimed in claim 3 , wherein the open-pore sintered glass is configured so that not more than 15 wt % of previously adsorbed propylene glycol is desorbed during a desorption time of 100 hours, and wherein the open-pore sintered glass desorbs at least 50% of the previously adsorbed propylene glycol at a temperature of 300° C. and a desorption time of 5 minutes.

5. The sintered body as claimed in claim 1 , wherein the transition temperature is greater than 600° C.

6. The sintered body as claimed in claim 1 , wherein the glass has a coefficient of linear thermal expansion a in a range from 2.5 ppm/K to 10.5 ppm/K.

7. The sintered body as claimed in claim 1 , wherein the average pore size is in a range from 90 μm to 350 μm.

8. The sintered body as claimed in claim 1 , wherein the porosity is at greater than 80 vol %.

9. The sintered body as claimed in claim 1 , wherein the glass is selected from the group consisting of a borosilicate glass, an aluminosilicate glass, an aluminoborosilicate glass, and a soda-lime glass.

10. The sintered body as claimed in claim 1 , wherein the glass comprises (in wt % on an oxide basis):

SiO 2
70 to 75 wt %;

Na 2 O + K 2 O
12 to 16 wt %;

CaO
8 to 11 wt %;

MgO
0 to 5 wt %; and

Al 2 O 3
0 to 2 wt %.

11. The sintered body as claimed claim 1 , wherein the glass comprises (in wt % on an oxide basis):

SiO 2
70 to 85 wt %;

B 2 O 3
5 to 15 wt %;

Alkali oxides
3 to 7 wt %;

Alkaline earth oxides
0 to 4 wt %; and

Al 2 O 3
2 to 5 wt %.

12. The sintered body as claimed in claim 1 , wherein the glass comprises (in wt % on an oxide basis):

SiO 2
50 to 75 wt %;

Na 2 O
0 to 15 wt %;

K 2 O
2 to 14 wt %;

Al 2 O 3
0 to 15 wt %;

MgO
0 to 4 wt %;

CaO
3 to 12 wt %;

BaO
0 to 15 wt %;

ZnO
0 to 5 wt %; and

TiO 2
0 to 2 wt %.

13. The sintered body as claimed in claim 1 , wherein the glass comprises (in wt % on an oxide basis):

SiO 2
30 to 85 wt %;

B 2 O 3
0.5 to 20 wt %;

Al 2 O 3
0 to 15 wt %;

Na 2 O
3 to 15 wt %;

K 2 O
2.5 to 15 wt %;

ZnO
0 to 12 wt %;

MgO
2 to 10 wt %;

BaO
0 to 10 wt %;

TiO 2
0 to 10 wt %; and

CaO
0 to 8 wt %.

14. The sintered body as claimed in claim 1 , wherein the specific surface area is smaller than 10 m 2 /g.

15. The sintered body as claimed in claim 1 , wherein the open-pore sintered glass is configured for a use selected from the group consisting of an electronic cigarette and a thermally heated evaporator for a fragrant substance.

16. A sintered body for use as a liquid res

Assignees

• Schott Ag

Inventors

• Peuchert Ulrich
• Greulich-Hickmann Norbert
• Treis Philipp
• Menke Yvonne
• Kluge Michael

Classifications

• C03C3/087 Primary

  containing calcium oxide, e.g. common sheet or container glass · CPC title

• A61M11/042

  electrical · CPC title

• C03C11/00 Primary

  Multi-cellular glass {; Porous or hollow glass or glass particles} · CPC title

• A61M15/06

  Inhaling appliances shaped like cigars, cigarettes or pipes · CPC title

• C03C3/091

  containing aluminium · CPC title