Thinh H Pham

US Patent:

8609244, Dec 17, 2013

Filed:

Dec 8, 2006

Appl. No.:

11/636136

Inventors:

Huagang Zhang - Yucaipa CA, US
Hamid Hojaji - Claremont CA, US
Shannon Marie Labernik - Rancho Cucamonga CA, US
David L. Melmeth - Fontana CA, US
Thinh Pham - Rancho Cucamonga CA, US
James A. McFarlane - Sydney, AU

Assignee:

James Hardie Technology Limited - Dublin

International Classification:

B32B 5/16
C03C 10/06
C03C 10/14
C03C 11/00
C03C 12/00

US Classification:

428402, 501 4, 501 8, 501 33, 501 39

Abstract:

A low density material and a method for preparing a low-density material and precursor for forming a low-density material are provided. An aqueous mixture of inorganic primary component and a blowing agent is formed, the mixture is dried and optionally ground to form an expandable precursor. Such a precursor is then fired with activation of the blowing agent being controlled such that it is activated within a predetermined optimal temperature range. The firing conditions are also controlled to provide a low density sphere containing a heterogeneous sphere wall structure comprising a combination of amorphous glass and a crystalline phase or gas phase or both.

US Patent:

20040262801, Dec 30, 2004

Filed:

Feb 25, 2004

Appl. No.:

10/787894

Inventors:

Hamid Hojaji - Claremont CA, US
Shannon Labernik - Rancho Cucamonga CA, US
Thinh Pham - Rancho Cucamonga CA, US
Huagang Zhang - Yucaipa CA, US

International Classification:

C04B035/64
C03B019/08

US Classification:

264/044000, 264/610000, 065/022000

Abstract:

A method of preparing a low-density material and precursor for forming a low-density material is provided. An aqueous mixture of inorganic primary component and a blowing agent is formed, the mixture is dried and optionally ground to form an expandable precursor. Such a precursor is then fired with activation of the blowing agent being controlled such that it is activated within a predetermined optimal temperature range. Control of the blowing agent can be accomplished via a variety of means including appropriate distribution throughout the precursor, addition of a control agent into the precursor, or modification of the firing conditions such as oxygen deficient or fuel rich environment, plasma heating etc.