公开(公告)号：US20180319711A1

公开(公告)日：2018-11-08

申请号：US15586390

申请日：2017-05-04

Applicant: General Electric Company

Inventor： Anthony Yu-Chung KU ,  Xi YANG ,  Tao LI ,  John Patrick POLLINGER ,  Zachary Kenneth MOWRY ,  Frederic Joseph KLUG

IPC: C04B35/185 ,  B28B1/24 ,  B28B11/24 ,  B28B13/06 ,  C04B35/64

CPC classification number: C04B35/185 ,  B28B1/24 ,  B28B7/42 ,  B28B11/243 ,  C04B35/64 ,  C04B41/0072 ,  C04B41/009 ,  C04B41/80 ,  C04B2111/0087 ,  C04B2111/00939 ,  C04B2235/3217 ,  C04B2235/483 ,  C04B2235/6567 ,  C04B2235/6581 ,  C04B2235/662 ,  C04B2235/75 ,  C04B2235/80 ,  C04B2235/9669 ,  C04B2235/9676 ,  C22C27/04 ,  C04B41/4515 ,  C04B41/4519 ,  C04B41/4556

Abstract: Methods for forming ceramic cores are disclosed. A ceramic core formed using the method of the present application includes a silica depletion zone encapsulating an inner zone. The inner zone includes mullite and the silica depletion zone includes alumina. The method includes heat-treating a ceramic body in a non-oxidizing atmospheric condition for an effective temperature and time combination at a pressure less than 10′ atmosphere to form the silica depletion zone at a surface of the ceramic core.

公开(公告)号：US20160214165A1

公开(公告)日：2016-07-28

申请号：US14605224

申请日：2015-01-26

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Cathleen Ann HOEL ,  John Thomas LEMAN ,  Thomas Francis MCNULTY ,  Michael Joseph O'BRIEN ,  Ayesha Maria GONSALVES ,  Matthew Thomas JOHNSON ,  Frederic Joseph KLUG

IPC: B22C1/02 ,  B22C9/04 ,  B22C9/10

CPC classification number: B22C1/02 ,  B22C9/04 ,  B22C9/10 ,  C04B35/16 ,  C04B35/632 ,  C04B35/6325 ,  C04B38/0605 ,  C04B2111/00939 ,  C04B2235/3244 ,  C04B2235/3418 ,  C04B2235/483 ,  C04B2235/6022 ,  C04B2235/606 ,  C08G77/12 ,  C08G77/20 ,  C08K3/36 ,  C08K2003/2244 ,  C08L83/00 ,  C08L83/04

Abstract: Methods and compositions for forming porous ceramic articles are provided. The method is forming a composition including liquid siloxanes, ceramic particles, a catalyst, and a pore-former; shaping the composition; curing the composition to form a green body; volatilizing the pore-former before or after curing the composition; and firing the green body. The pore-former is a silicon-bearing agent with an average molecular weight under 1300 grams per mole, or a molecule with a molecular weight under 1,000 grams per mole and a freezing point between −40° C. and 25° C. that is soluble in the liquid. The composition comprises liquid siloxanes, ceramic particles, a catalyst, and a pore-former, which is an agent with an average molecular weight under 1300 grams per mole or a molecule with a molecular mass under 1,000 grams per mole and a freezing point between −40° C. and 25° C. that is soluble in the liquid.

Abstract translation: 提供了形成多孔陶瓷制品的方法和组合物。 该方法是形成包括液体硅氧烷，陶瓷颗粒，催化剂和成孔剂的组合物; 塑造组成; 固化组合物以形成生坯体; 在固化组合物之前或之后挥发成孔剂; 并发射绿色的身体。 成孔剂是平均分子量低于1300克/摩尔的含硅剂，或分子量低于1,000克/摩尔的分子和在-40℃和25℃之间的凝固点，即 溶于液体。 该组合物包含液体硅氧烷，陶瓷颗粒，催化剂和成孔剂，其是平均分子量低于1300克/摩尔的试剂或分子量小于1,000克/摩尔的分子和 - 40℃和25℃，其可溶于液体。