With Vitrification Or Firing Ceramic Material Patents (Class 156/89.11)
  • Patent number: 6206992
    Abstract: A fibrous ceramics fabrication method using a room extrusion process and a fibrous monolithic ceramics fabrication method using thereof is disclosed. The method includes the steps of obtaining a extrusion-purpose slurry by evenly mixing a hydrophilic cellulose bonding agent 3 to 7 and a hydrophilic organic plasticizer 5 to 20 for improving a formation property by softening the cellulose bonding agent with a distilled water 45 to 55, with regard to a weight percent 100 of a ceramic powders selected from a group of silicon nitride, silicon carbide and alumina, carrying out a room temperature extrusion from the extrusion-purpose slurry, and coating the fiber by passing through a mixedly dispersed coating-purpose slurry a ceramic powders 20 to 45 selected from a group of boron nitride and graphite, an organic dispersant 0.
    Type: Grant
    Filed: November 4, 1998
    Date of Patent: March 27, 2001
    Assignee: Agency for Defense Development
    Inventors: Yong-Kee Baek, Do-Kyung Kim, Shi-Woo Lee, Jong-Gyu Paik
  • Patent number: 6203638
    Abstract: An injection molded ceramic cup, such as a teacup, includes a body and a handle. The body and handle together are an integral, one-piece, unitary construction formed of ceramic and a binder in a single injection molding operation. Additionally, an injection molded article, such as a ceramic cup, has a concealed sprue and includes an injection molded article body having an outer surface defining a recess and a sprue (whether negative or positive) terminating in the recess. A plug is disposed in the recess for concealing the sprue, the plug being molded separate and distinct from the article, having a first surface for concealing the sprue and a sidewall for substantially filling the recess, and being fired in situ with the article to secure the article and plug together.
    Type: Grant
    Filed: May 23, 1994
    Date of Patent: March 20, 2001
    Assignee: Certech, Inc.
    Inventor: Stuart Z. Uram
  • Patent number: 6180054
    Abstract: A ceramic hot-gas candle filter having a porous support of filament-wound oxide ceramic yarn at least partially surrounded by a porous refractory oxide ceramic matrix, and a membrane layer on at least one surface thereof. The membrane layer may be on the outer surface, the inner surface, or both the outer and inner surface of the porous support. The membrane layer may be formed of an ordered arrangement of circularly wound, continuous filament oxide ceramic yarn, a ceramic filler material which is less permeable than the filament-wound support structure, or some combination of continuous filament and filler material. A particularly effective membrane layer features circularly wound filament with gaps intentionally placed between adjacent windings, and a filler material of ceramic particulates uniformly distributed throughout the gap region. The filter can withstand thermal cycling during backpulse cleaning and is resistant to chemical degradation at high temperatures.
    Type: Grant
    Filed: February 2, 1999
    Date of Patent: January 30, 2001
    Assignee: AlliedSignal Composites Inc.
    Inventors: Elizabeth Sokolinski Connolly, George Daniel Forsythe, Daniel Matthew Domanski, Jeffrey Allen Chambers, Govindasamy Paramasivam Rajendran
  • Patent number: 6171420
    Abstract: When green sheets are laminated and integrally fired for a window spacer plate formed with at least a plurality of windows, a covering plate for covering the windows, and a through hole plate having through holes, communicating with the windows, it is arranged to make a ratio t/w of thickness t of the green sheet for the window spacer place to length w of the through holes formed in the green sheet for the through hole plate, in its minor axis direction one or more, and to form a functional film actuator on the outer surface of the covering plate after firing. A gap (separation) is prevented from being generated in the interface between each ceramics plate in producing a ceramics substrate used for the functional film element.
    Type: Grant
    Filed: March 3, 1998
    Date of Patent: January 9, 2001
    Assignee: NGK Insulators, Ltd.
    Inventors: Nobuo Takahashi, Tsutomu Nanataki
  • Patent number: 6168680
    Abstract: A zirconia diaphragm structure, and a method of producing such structure. The zirconia diaphragm structure includes a zirconia substrate having at least one window, and a zirconia diaphragm plate formed integrally with the zirconia substrate so as to close each window, the zirconia substrate comprising a zirconia material as a major component, and containing 0.1-3.0% by weight of alumina, 0.1-3.0% by weight of silica, 0.1-5.0% by weight of alumina and silica, 0.1-5.0% by weight of alumina and magnesia, or 0.1-5.0% by weight of alumina, silica and magnesia.
    Type: Grant
    Filed: October 21, 1998
    Date of Patent: January 2, 2001
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Hideo Masumori, Katsuyuki Takeuchi, Tsutomu Nanataki