公开(公告)号：US3834911A

公开(公告)日：1974-09-10

申请号：US25814972

申请日：1972-05-31

Applicant: PPG INDUSTRIES INC

Inventor： HAMMEL J

IPC: C03C10/00 ,  C03C10/16 ,  C03C3/22

CPC classification number: C04B35/653 ,  C03C10/0027 ,  C03C10/16 ,  C04B35/19 ,  C04B2235/32 ,  C04B2235/3203 ,  C04B2235/3206 ,  C04B2235/3215 ,  C04B2235/3218 ,  C04B2235/3232 ,  C04B2235/3248 ,  C04B2235/3284 ,  C04B2235/3294 ,  C04B2235/34 ,  C04B2235/3427 ,  C04B2235/445 ,  C04B2235/6562 ,  C04B2235/6565 ,  C04B2235/77 ,  C04B2235/785 ,  C04B2235/85 ,  C04B2235/9607 ,  C04B2235/9623

Abstract: NOVEL THERMALLY CRYSTALLIZABLE GLASS COMPOSITIONS WHICH ARE RELATIVELY NON-VOLATILE AND HAVE GOOD MELTING AND FORMING CHARACTERISTICS CONTAINING: 64-74 PERCENT SIO2, 15-25 PERCENT AL2O3, 3.3-4.8 PERCENT LI2O, 2.0-5.0 PERCENT TIO2, 0.6-1.6 PERCENT ZRO2, 1.0-2.1 PERCENT BAO, O.10-0.30 PERCENT F- AND 0-0.5 PERCENT MGO, AND GLASS CERAMIC ARTICLES MADE THEREFROM ARE DISCLOSED. THE GLASSCERAMICS HAVE COEFFICIENTS OF THERMAL EXPANSION OF BELOW 2.0X10**-7/*C. OVER THE TEMPERATURE RANGE OF 0 TO 300* C. AND HAVE WELL NUCLEATED, SMOOTH SURFACES MAKING THE GLASS-CERAMICS PARTICULARLY USEFUL AS COOKING SURFACES FOR STOVE TOPS AND THE LIKE.

公开(公告)号：US3793061A

公开(公告)日：1974-02-19

申请号：US3793061D

申请日：1971-04-15

Applicant: PPG INDUSTRIES INC

Inventor： HAMMEL J ,  MACKENZIE J

IPC: A24D3/16 ,  B44D1/02

CPC classification number: A24D3/166

Abstract: A method of increasing the smoke filtering activity of porous glass which involves the incorporation of hydroxyl ions in high concentrations in the pores of the microporous glass article. The microporous glass is heated at a temperature in the order of 100* to 600*C for about 5 to 120 minutes in an atmosphere of water and an inert gas.

Abstract translation: 一种增加多孔玻璃的烟雾过滤活性的方法，其涉及在微孔玻璃制品的孔中高浓度地掺入羟基离子。 在水和惰性气体气氛中，将微孔玻璃在100〜600℃左右的温度下加热约5〜120分钟。

公开(公告)号：US3843341A

公开(公告)日：1974-10-22

申请号：US31119172

申请日：1972-12-01

Applicant: PPG INDUSTRIES INC

Inventor： HAMMEL J ,  ALLERSMA T

IPC: C03B8/00 ,  B01D39/06 ,  B01D53/86 ,  B01J20/00 ,  B01J20/32 ,  B01J21/08 ,  B01J21/12 ,  B01J37/06 ,  C02F1/68 ,  C03B20/00 ,  C03C3/04 ,  C03C3/06 ,  C03C3/064 ,  C03C3/089 ,  C03C3/091 ,  C03C4/00 ,  C03C11/00 ,  C03C12/00 ,  C03C15/00 ,  C03C23/00

CPC classification number: B01D71/04 ,  B01D39/06 ,  B01D53/86 ,  B01D67/0058 ,  B01J21/08 ,  B01J37/06 ,  C02F1/681 ,  C03C3/06 ,  C03C3/064 ,  C03C3/089 ,  C03C3/091 ,  C03C11/005 ,  C03C15/00 ,  C03C23/008 ,  C03C2201/10 ,  C03C2201/32 ,  C03C2201/50 ,  C03C2201/80 ,  C03C2203/10 ,  C03C2203/50 ,  Y10T428/31 ,  Y10T428/315

Abstract: 1. A METHOD FOR MAKING A LOW ALKALI-CONTAINING POROUS GLASS ARTICLE HAVING A HIGH THERMAL STABILITY COMPRISING: (A) HEATING A PHASE-SEPARABLE ALKALI-BOROSILICATE GLASSS TO A TEMPERATURE SUFFFICIENT TO SEPARATE THE GLASS INTO TWO PHASES, ONE OF WHICH IS A BORATE-RICH PHASE AND IS SOLUBLE IN AN AQUEOUS SOLUTION, (B) A FIRST LEACHING OF THE PHASE-SEPARATED GLASS WITH WATER FOR A TIME AND AT A TEMPERATURE SUFFICIENT TO REMOVE A MAJOR PORTION OF THE BORATE-RICH PHASE TO FORM A POROUS GLASS HIGH IN SILICA, (C) A SUBSEQUENT LEACHING OF THE PREVIOUSLY LEACHED POROUS GLASS WITH AN ACID FOR A TIME AND AT A TEM-

PERATURE SUFFICIENT TO REMOVE SUFFICIENT ALKALI AND BORATE NOT REMOVAL IN THE FIRST LEACHING TO PROVIDE A LOW ALKALI-BORATE CONTAINING MICROPOROUS GLASS STRUCTURE HAVING A HIGH THERMAL STABILITY.