公开(公告)号：EP2323955A1

公开(公告)日：2011-05-25

申请号：EP09773929.6

申请日：2009-07-02

申请人： Corning Inc.

发明人： AMIN, Jaymin ,  BEALL, George, H. ,  BEALL, Lorrie, F. ,  DEJNEKA, Matthew, J. ,  PINCKNEY, Linda, R. ,  ROSSINGTON, Katherine, R.

IPC分类号： C03C3/118 ,  C03C3/112 ,  C03C3/083 ,  C03C3/093 ,  C03C3/097 ,  C03C10/00 ,  C03C10/16 ,  C03C21/00

CPC分类号： C03C3/118 ,  C03C3/083 ,  C03C3/093 ,  C03C3/097 ,  C03C3/112 ,  C03C10/00 ,  C03C10/0009 ,  C03C10/0027 ,  C03C10/0045 ,  C03C10/16 ,  C03C21/002

摘要： The invention relates glass ceramic articles suitable for use as electronic device housing or enclosures which comprise a glass-ceramic material. Particularly, a glass-ceramic article housing/enclosure comprising a glass-ceramic material exhibiting both radio and microwave frequency transparency, as defined by a loss tangent of less than 0.5 and at a frequency range of between 15 MHz to 3.0 GHz, a fracture toughness of greater than 1.5 MPa⋅m
½ , an equibiaxial flexural strength (ROR strength) of greater than 100 MPa, a Knoop hardness of at least 400 kg/mm
2 , a thermal conductivity of less than 4 W/m°C and a porosity of less than 0.1 %.

公开(公告)号：EP2334613A1

公开(公告)日：2011-06-22

申请号：EP09789189.9

申请日：2009-08-21

申请人： Corning Inc.

发明人： AMIN, Jaymin ,  DEJNEKA, Matthew, John ,  PINCKNEY, Linda, R ,  ROSSINGTON, Katherine, R ,  SABIA, Robert

IPC分类号： C03C3/083 ,  C03C3/087 ,  C03C3/091 ,  C03C3/093 ,  C03C21/00

CPC分类号： C03C21/002 ,  C03C3/083 ,  C03C3/087 ,  C03C3/091 ,  C03C3/093 ,  Y10T428/131 ,  Y10T428/24355 ,  Y10T428/265

摘要： The invention relates to glass articles suitable for use as electronic device housing/ enclosure or protective cover which comprise a glass material. Particularly, a housing/enclosure/cover comprising an ion-exchanged glass exhibiting the following attributes (1) radio, and microwave frequency transparency, as defined by a loss tangent of less than 0.03 and at a frequency range of between 15 MHz to 3.0 GHz; (2) infrared transparency; (3) a fracture toughness of greater than 0.6 MPa?m
½ ; (4) a 4-point bend strength of greater than 350 MPa; (5) a Vickers hardness of at least 450 kgf/mm
2 and a Vickers median/radial crack initiation threshold of at least 5 kgf; (6) a Young's Modulus ranging between about 50 to 100 GPa;; (7) a thermal conductivity of less than 2.0 W/m°C, and (9) and at least one of the following attributes: (i) a compressive surface layer having a depth of layer (DOL) greater and a compressive stress greater than 400 MPa, or, (ii) a central tension of more than 20 MPa.