摘要:
This invention relates to the production of a composite article consisting of an opal glass body exhibiting a dense, milky-white appearance coated with an adherent enamel demonstrating high gloss and exceptional chemical durability. More specifically, the opal glasses of the present invention have compositions within the Na.sub.2 O-Al.sub.2 O.sub.3 -SiO.sub.2 -F system and demonstrate a softening point in excess of 760.degree. C., a strain point in excess of 490.degree. C., and a coefficient of thermal expansion (0.degree.-300.degree. C.) of about 66-75 .times. 10.sup..sup.-7 /.degree. C. The enamels of the instant invention have flux compositions within the Li.sub.2 O-B.sub.2 O.sub.3 -TiO.sub.2 -ZrO.sub.2 -PbO-SiO.sub.2 system, will fire to a high gloss in less than about 10 minutes at temperatures below about 720.degree. C., will exhibit coefficients of thermal expansion (25.degree.-300.degree. C.) about 3-10 points lower than the opal glass substrate, will demonstrate lead release after chemical attack of less than about 2 .mu.g/cm.sup.2, and will manifest excellent resistance to dishwasher detergents.
摘要:
This invention is concerned with spontaneous opal glasses wherein sodium fluoride (NaF) and strontium fluoride (SrF.sub.2) constitute the predominant opacifying phases. More specifically, the opal glasses of the instant invention have compositions within the Na.sub.2 O--SrO--Al.sub.2 O.sub.3 --SiO.sub.2 --F field and exhibit a dense white appearance, a softening point above 755.degree. C., a strain point in excess of 500.degree. C., a coefficient of thermal expansion (0.degree.-300.degree. C.) in excess of 65.degree. .times. 10.sup.-7 /.degree. C., and satisfactory resistance to weathering and dishwasher environments.
摘要:
This invention is concerned with the production of transparent glass articles exhibiting an integral light gray-brown hue. More particularly, this invention is drawn to specific borosilicate-based glass compositions containing critically-defined amounts of Co.sub.3 O.sub.4, NiO, and MnO.sub.2 as colorants therefor. The resulting glasses exhibit a specifically-delineated transmittance curve in the visible portion of the radiation spectrum.
摘要:
The present invention is concerned with the preparation of hydraulic cements, demonstrating high mechanical strength, long term resistance to attack by moisture, and virtual freedom from creep, from glass powders consisting essentially, expressed in terms of mole percent on the oxide basis, of about 60-76% SiO.sub.2, 15-30% K.sub.2 O, and 2-15% total of at least one metal oxide selected from the group of 0-10% Al.sub.2 O.sub.3, 0-5% V.sub.2 O.sub.5, 0-5% TiO.sub.2, 0-5% MoO.sub.3 and 0-5% WO.sub.3. The cements exhibit particular utility in forming strong cellular ceramic articles. The glass powders may contain a phosphate component in which case the composition ranges are limited to 68-76% SiO.sub.2, 18-24% K.sub.2 O, 2-4.5% P.sub.2 O.sub.5 with the molar ratio K.sub.2 O:P.sub.2 O.sub.5 ranging between 5 and 10, and 2-5% total of at least one metal oxide selected from the group of Al.sub.2 O.sub.3, MoO.sub.3, V.sub.2 O.sub.5 and WO.sub.3.
摘要翻译:本发明涉及水硬性水泥的制备,其表现出高的机械强度,长期抵抗水分侵蚀,以及从基本上由氧化物基础上表示的玻璃粉末基本上由摩尔百分数表示的玻璃粉末的大约 60-76%SiO 2,15-30%K 2 O和2-15%总量的至少一种选自0-10%Al 2 O 3,0-5%V 2 O 5,0-5%TiO 2,0-5 %MoO 3和0-5%WO 3。 水泥在形成强的细胞陶瓷制品方面表现出特别的效用。 玻璃粉末可以含有磷酸盐成分,在这种情况下,组成范围限于SiO 2的68-76%,18-24%K 2 O,2-4.5%P 2 O 5,K 2 O:P 2 O 5的摩尔比在5和10之间,2- 选自Al2O3,MoO3,V2O5和WO3中的至少一种金属氧化物的总量为5%。
摘要:
This invention is directed to transparent glass which, after thermal tempering demonstrates a tint defined by C.I.E. chromaticity coordinates and transmission utilizing Illuminant C ofx=0.3300.+-.0.0040y=0.3360.+-.0.0040Y=60.8.+-.4The glass consists essentially, in weight percent on the oxide basis, of______________________________________ SiO.sub.2 75 .+-.2.0 Na.sub.2 O 13.45 .+-. 0.5 Al.sub.2 O.sub.3 165 .+-. 0.2 CaO 9.6 .+-. 0.3 As.sub.2 O.sub.3 0.15 .+-. 0.1 NiO 0.03 .+-. 0.005 with Cr.sub.2 O.sub.3 0.002 .+-. 0.0005 or CuO 0.005 .+-. 0.002 ______________________________________
摘要:
This invention is directed to the production of spontaneous essentially non-crystalline opal glasses exhibiting a very dense, milky-white appearance and excellent resistance to weathering and attack by alkaline detergents consisting essentially, expressed in weight percent on the oxide basis, of 2-5% K.sub.2 O, 4-10% Na.sub.2 O, 4.5-12% RO, wherein RO consists of 0-3% MgO, 0-6% CaO, 0-8% SrO, and 0-11% BaO, 4-9% B.sub.2 O.sub.3, 6-15% Al.sub.2 O.sub.3, 0-5% TiO.sub.2, 51-66% SiO.sub.2, 1-6% P.sub.2 O.sub.5, and 1-5% F.
摘要:
The instant invention involves the production of articles exhibiting an internal microstructure and physical characteristics like those of glass-ceramic bodies but which can be formed spontaneously from a molten glass. Hence, in contrast to the production of conventional glass-ceramic articles, no heat treatment of a parent or precursor glass body is required to cause crystallization in situ to occur. More particularly, the instant invention is concerned with the manufacture of highly crystalline glass-ceramic articles, having compositions within the Li.sub.2 O-Na.sub.2 O-Al.sub.2 O.sub.3 -MgO-SiO.sub.2 -F system, wherein a fluormica constitutes the predominant crystal phase, which can be formed spontaneously from a molten glass batch.
摘要:
This invention relates to silicate glasses that possess good resistance to chemical attack by both acid and alkaline media, that may be either clear and transparent or colored as desired, and that may have a moderate thermal coefficient of expansion to provide resistance to thermal shock. Such glasses have general application, but find particular utility in tubing and containers for scientific and pharmaceutical glassware.
摘要:
This invention is directed to the production of inorganic crystalline fibers containing a minor amount of Mo0.sub.3 and/or W0.sub.3 and/or As.sub.2 0.sub.3 and wherein the predominant crystal phase is selected from the group of a fluormica, a fluoramphibole, canasite, potassium and/or sodium fluorrichterite, fluorapatite, and a lithium-containing, beta-spodumene-type crystal.
摘要翻译:本发明涉及含有少量MoO 3和/或W 3 O和/或As 2 O 3的无机结晶纤维的制备,其中主要结晶相选自氟堇,氟phi石,堇青石,钾和/或钠 氟锆石,氟磷灰石和含锂的β-锂辉石型晶体。
摘要:
This invention is directed to spontaneous opal glasses wherein Ba.sub.2 F(PO.sub.4) constitutes the predominant crystalline opal phase. The glasses exhibit softening points in excess of 710.degree. C., excellent chemical durability, and consist essentially, in weight percent on the oxide basis, of 6-10% Na.sub.2 O, 1-6% K.sub.2 O, 4-11% BaO, 9-18% Al.sub.2 O.sub.3, 50-70% SiO.sub.2, 3.5-7% P.sub.2 O.sub.5, and 1-4% F.