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公开(公告)号：US06908674B2
公开(公告)日：2005-06-21
申请号：US09799192
申请日：2001-03-05
申请人： Suresh Shankarappa Vagarali , Thomas Richard Anthony , John Casey , Robert Charles DeVries , Stephen Lee Dole , John William Lucek , Alan Cameron Smith , Biju Varghese , Steven William Webb
发明人： Suresh Shankarappa Vagarali , Thomas Richard Anthony , John Casey , Robert Charles DeVries , Stephen Lee Dole , John William Lucek , Alan Cameron Smith , Biju Varghese , Steven William Webb
CPC分类号： C01B33/26 , B01J3/062 , B01J2203/068 , C01B33/20 , Y10T428/2982 , Y10T428/2996
摘要： A jadeite material has a thickness in excess of about 1.0 mm and CIELAB indices of L*>42, a* +6. The grain size of the jadeite material is less than about 30 microns and is an equiaxed grain structure. The jadeite material has an optical transmission peak between 500 and 565 nm with an I/IO optical transmission ratio of over 40%. The first step in making the jadeite material is to wrap a glass block, convertible by HP/HT into jadeite and having a nominal composition of NaAlSi2O6, with a graphite or refractive metal sheet. The wrapped glass block is placed in an HP/HT apparatus, rapidly heated, and subjected therein to a pressure in excess of about 3 GPa and a temperature in excess of about 1000° C. for a time adequate to convert the glass block into jadeite. The jadeite material then is cooled and the pressure subsequently released.
摘要翻译： 翡翠材料的厚度超过约1.0mm，CIELAB指数L *> 42，a * <-6和b *> + 6。 翡翠材料的晶粒尺寸小于约30微米，是等轴晶粒结构。 翡翠材料具有在500和565nm之间的光传输峰值，其中I / I / O光透射率超过40％。 制造翡翠材料的第一步是将玻璃块包裹，由HP / HT转化为翡翠，并具有标称组成的NaAlSi 2 O 6 6，与石墨 或折射金属片。 将包裹的玻璃块放置在HP / HT装置中，快速加热，并在其中进行超过约3GPa的压力和超过约1000℃的温度，足以将玻璃块转化成翡翠 。 然后将翡翠材料冷却并随后释放压力。
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公开(公告)号：US06814775B2
公开(公告)日：2004-11-09
申请号：US10437516
申请日：2003-05-14
IPC分类号： C22C2916
CPC分类号： C04B35/583 , B22F2998/00 , B23B27/148 , C04B35/5831 , C04B35/6261 , C04B2235/3217 , C04B2235/3804 , C04B2235/3813 , C04B2235/3817 , C04B2235/3839 , C04B2235/3843 , C04B2235/3847 , C04B2235/386 , C04B2235/3865 , C04B2235/3886 , C04B2235/402 , C04B2235/404 , C04B2235/5436 , C04B2235/72 , C04B2235/762 , C04B2235/786 , C04B2235/80 , C22C26/00 , C22C29/16 , C22C2026/005 , C22C2026/006
摘要： A sintered cubic boron nitride (cBN) compact for use in a tool is composed of between about 60 and 80 vol-% cBN having a volumetric mean particle size of between about 3 to 6 &mgr;m and between about 40 and 20 vol-% of a ceramic binder phase. The ceramic binder is composed of between about 20 and 60 vol-% of one or more of a carbide, nitride, or boride of a Group IVB or VIB metal, and between about 40 and 80 vol-% of one or more of carbides, nitrides, borides, or oxides of aluminum. The cBN compact additionally contains between about 3 and 15 wt-% tungsten. The cBN compacts are especially useful in machining iron and like chemically reactive parts, especially where such parts are powder metal parts.
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3.发明授权Method of forming rare earth oxide ceramic scintillator with ammonium dispersion of oxalate precipitates 失效用草酸盐沉淀的铵分散体形成稀土氧化物陶瓷闪烁体的方法
公开(公告)号：US5116560A
公开(公告)日：1992-05-26
申请号：US673608
申请日：1991-03-22
CPC分类号： G01T1/202 , C01F17/0043 , C04B35/50 , C09K11/7787 , G01T1/2023
摘要： A method of forming polycrystalline rare earth oxide ceramic scintillators formed by dissolving a mixture of oxides of the scintillator in an aqueous hydrochloric or nitric acid solution to form a rare earth solution, precipitating oxalates from the rare earth solution, calcining the oxalates to form the respective oxides, cold pressing the oxides to form a compact, and sintering the compact in a reducing atmosphere or vacuum to form the scintillator, the method being improved by precipitating the oxalates by admixing the rare earth solution with an oxalic solution comprised of, oxalic acid and ammonium ions in an amount that disperses the oxalate precipitates.
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