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公开(公告)号：US4218622A
公开(公告)日：1980-08-19
申请号：US870237
申请日：1978-01-17
CPC分类号： B29C70/88 , B29C70/025 , G21F1/12
摘要： A composite, neutron absorbing, coated article, suitable for installation in storage racks for spent nuclear fuel and for other neutron absorbing applications, includes a backing member, preferably of flexible material such as woven fiberglass cloth, a synthetic organic polymeric coating or a plurality of such coatings on the backing member, preferably of cured phenolic resin, such as phenol formaldehyde or trimethylolphenol formaldehyde and boron carbide particles held to the backing member by the cured coating or a plurality of such coatings. Also within the invention is a method for the manufacture of the neutron absorbing coated article and the use of such an article. In a preferred method the backing member is first coated on both sides thereof with a filling coating of thermosettable liquid phenolic resin, which is then partially cured to solid state, one side of the backing member is then coated with a mixture of thermosettable liquid resin and finely divided boron carbide particles and the resin is partially cured to solid state, the other side is coated with a similar mixture, larger boron carbide particles are applied to it and the resin is partially cured to solid state, such side of the article is coated with thermosettable liquid phenolic resin, the resin is partially cured to solid state and such resin, including previously applied partially cured resins, is cured to final cross-linked and permanently set form.
摘要翻译： 适用于安装在废核燃料和其他中子吸收应用的存储架中的复合中子吸收涂层制品包括背衬构件，优选为柔性材料，例如编织玻璃纤维布，合成有机聚合物涂层或多个 背衬构件上的这种涂层，优选固化的酚醛树脂，例如苯酚甲醛或三羟甲基酚甲醛，以及通过固化的涂层或多个这样的涂层保持在背衬构件上的碳化硼颗粒。 本发明还有一种制造中子吸收涂层制品的方法和这种制品的用途。 在优选的方法中，首先在其两侧涂覆有背衬构件的可热固的液体酚醛树脂的填充涂层，然后将其部分固化成固体状态，然后用热固性液体树脂和 精细分散的碳化硼颗粒和树脂部分固化成固体状态，另一侧涂覆有类似的混合物，较大的碳化硼颗粒被施加到树脂上并将树脂部分固化成固态，制品的这一面被涂覆 使用可热固的液体酚醛树脂，将树脂部分固化成固态，并将这种树脂（包括预先涂敷的部分固化的树脂）固化成最终交联和永久固定的形式。
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公开(公告)号：US4207408A
公开(公告)日：1980-06-10
申请号：US908481
申请日：1978-05-22
CPC分类号： D01F6/76
摘要： Infusible cured phenolic resin fibers of the present invention have a birefringence of at least 2.times.10.sup.-3 with the x-ray diffraction pattern of the fibers showing an amorphous halo. The tenacity of infusible cured phenolic resin fibers is significantly increased by subjecting the fibers to sufficient longitudinal tension as to cause at least about 30% elongation of the fibers. The Young's modulus of elasticity of the fibers is also significantly increased thereby. Preferably the resulting stretched infusible cured phenolic resin fibers have a tenacity of at least about 4 g./den.
摘要翻译： 本发明的可燃固化酚醛树脂纤维的双折射率至少为2×10 -3，其中纤维的X射线衍射图显示无定形卤素。 通过使纤维具有足够的纵向张力使纤维伸长至少约30％，可溶性酚醛树脂纤维的韧性显着增加。 纤维的杨氏弹性模量也显着增加。 优选地，所得到的拉伸的可熔融固化的酚醛树脂纤维具有至少约4g./den的强度。
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83.发明授权
公开(公告)号：US4172109A
公开(公告)日：1979-10-23
申请号：US937395
申请日：1978-08-28
申请人： Richard H. Smoak
发明人： Richard H. Smoak
IPC分类号： C04B35/565 , C04B35/56
CPC分类号： C04B35/565
摘要： A sinterable silicon carbide mixture is described which is prepared by mixing finely-divided silicon carbide containing between about 0.5 and about 5.0 percent by weight of excess carbon with a finely-divided beryllium-containing additive wherein the amount of beryllium in the mixture is equal to between about 0.03 and about 1.5 percent by weight of the powder. A dense silicon carbide ceramic product is prepared from the powder mixture by pressureless sintering wherein the article is initially shaped and subsequently sintered in a beryllium-containing atmosphere at a temperature from about 1950.degree. to about 2300.degree. C.
摘要翻译： 描述了可烧结的碳化硅混合物，其通过将含有约0.5至约5.0重量％的过量碳的细碎碳化硅与细碎的含铍添加剂混合而制备，其中混合物中铍的量等于 在粉末的约0.03至约1.5重量％之间。 通过无压烧结从粉末混合物制备致密的碳化硅陶瓷产品，其中制品初始成型，随后在约1950℃至约2300℃的温度下在含铍的气氛中烧结。
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公开(公告)号：US4169584A
公开(公告)日：1979-10-02
申请号：US934920
申请日：1978-08-18
申请人： Mahesh C. Mangalick
发明人： Mahesh C. Mangalick
CPC分类号： C22B9/05 , C22B21/066 , Y10S266/901
摘要： Gas is injected into molten metal, such as aluminum, to purify the molten metal either of dissolved gases (degassing), or of dissolved solids such as magnesium ( "demagging"). The apparatus for accomplishing this injection contains two metallic bath chambers, the molten metal being transferred from one chamber to the other through a conduit. A gas injection conduit is connected to the metal transfer conduit at a location submerged within the first metallic bath chamber from which metal is transferred to the second chamber, and the gas to be injected is introduced through this gas injection conduit into a location submerged within the first metallic bath chamber.
摘要翻译： 将气体注入诸如铝的熔融金属中，以净化溶解的气体（脱气）或溶解的固体如镁（“脱模”）的熔融金属。 用于完成该注射的装置包含两个金属浴室，熔融金属通过导管从一个室转移到另一个室。 气体注入管道在浸没在第一金属浴室内的位置处连接到金属输送管道，金属从该金属槽室转移到第二室，并且待注入的气体通过该气体注入管道被引入浸没在第二金属槽室内的位置 第一金属浴室。
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公开(公告)号：US4157001A
公开(公告)日：1979-06-05
申请号：US869187
申请日：1978-01-13
申请人： Allan E. Pickles
发明人： Allan E. Pickles
CPC分类号： F27D1/144
摘要： There is disclosed a device for securing refractory and/or insulating material against a furnace wall. The device comprises a metal pin or stud which is attached to the wall at one end and is provided with a plurality of notched portions adjacent the other end. The stud cooperates with a hollow, preferably ceramic anchor, which is provided with a rectangular slot that fits over the notched portion of the stud and may be secured thereon by rotating an anchor through 90 degrees to effect a locking arrangement. The anchors may be interfitted in order to provide a support for electrical heating elements. The significant feature is that the size of the anchor is such as to allow another anchor to interlock and make a collar which can support electrical heating elements. As the anchor is preferably a ceramic support it is electrically insulating, and prevents the electrical heating elements from contacting the studs.
摘要翻译： 公开了一种用于将耐火材料和/或绝缘材料固定在炉壁上的装置。 该装置包括在一端附接到壁上的金属销或螺柱，并且在另一端附近设置有多个切口部分。 螺柱与中空的，优选的陶瓷锚配合，其设置有矩形狭槽，其配合在螺柱的切口部分上方并且可以通过使锚固件旋转90度而固定在其上以实现锁定装置。 为了提供对电加热元件的支撑，锚可以配合。 重要的特征是锚固件的尺寸允许另一锚固件互锁并制成可支撑电加热元件的套环。 由于锚固体优选是陶瓷载体，它是电绝缘的，并且防止电加热元件接触螺栓。
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公开(公告)号：US4156147A
公开(公告)日：1979-05-22
申请号：US866101
申请日：1977-12-30
申请人： Robert G. Naum , Dean P. Owens , George I. Dooher
发明人： Robert G. Naum , Dean P. Owens , George I. Dooher
摘要： A neutron absorbing article, preferably in flat plate form and suitable for use in a storage rack for spent nuclear fuel, includes boron carbide particles, diluent particles and a solid, irreversibly cured phenolic polymer cured to a continuous matrix binding the boron carbide and diluent particles. The total content of boron carbide and diluent particles is a major proportion of the article and the content of cured phenolic polymer present is a minor proportion. By regulation of the ratio of boron carbide particles to diluent particles, normally within the range of 1:9 and 9:1 and preferably within the range of 1:5 to 5:1, the neutron absorbing activity of the product may be controlled, which facilitates the manufacture of articles of particular absorbing activities best suitable for specific applications.
摘要翻译： {PG，1 A中子吸收制品，优选为平板形式并适用于废核燃料的储存架，包括碳化硼颗粒，稀释剂颗粒和固化的不可逆固化的酚醛聚合物，固化至连接基体上的硼 碳化物和稀释剂颗粒。 碳化硼和稀释剂颗粒的总含量是制品的主要比例，而固化酚醛聚合物的含量是一小部分。 通过调节碳化硼颗粒与稀释剂颗粒的比率，通常在1:9和9:1的范围内，优选在1:5至5:1的范围内，可以控制产物的中子吸收活性， 这有助于制造最适合于特定应用的特定吸收活性物品。
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87.发明授权
公开(公告)号：US4149994A
公开(公告)日：1979-04-17
申请号：US856881
申请日：1977-12-02
申请人： Hari N. Murty
发明人： Hari N. Murty
IPC分类号： C01B32/384 , B01J21/18 , C01B31/08 , C01B31/10 , C01B31/14
CPC分类号： C01B31/14
摘要： Granular activated carbon is manufactured from briquettes of about 1".times.2", formed from brown coal, from which iron material has been extracted and which has a moisture content of about 15% by weight, by crushing and screening the pretreated coal briquettes to produce 8/30 mesh granules, treating the granules with a dilute aqueous solution of inorganic acid (H.sub.2 SO.sub.4, H.sub.3 PO.sub.4 or HCl) at a concentration of about 1 to about 10% by weight to reduce the volatile content and thereby increase the fixed carbon content comprising: mixing the granules with the acid, washing off the acid, and drying the granules at least partially to a moisture content below about 25% by weight. In one case the washed granules are dried partially to a moisture content of about 10 to about 25% by weight without the addition of a carbonaceous binder such as coal tar pitch. In the other case the granules are dried thoroughly and mixed with about 5 to about 15% by weight of coal tar pitch. The so treated granules are ground to form fine powder of more than about 65% by weight -325 mesh, more preferably 75 to 85% by weight -325 mesh, which is compressed into shapes such as pellets of 0.5" diameter and 0.5" long under a pressure of 40,000 to 80,000 psi, and then granulated to obtain 6/20 mesh granules. These reformed granules are devolatilized, without charring, by directly heating to and at a temperature higher than the charring temperature in an oxygen-free atmosphere, and then activated by heating to and at a temperature higher than the devolatilizing temperature in an atmosphere containing a gaseous activating agent. The overall yield of granular activated carbon is not less than about 22% by weight, dry basis, and the activated granules have a surface area of not less than about 900 m.sup.2 /gram, an Iodine number of not less than about 900, an ash content of not more than about 7% by weight, an abrasion number of not less than about 70, an apparent density of not less than about 0.46 gram/cc, and a Molasses number of not less than about 200; which properties make them suitable for use in water and waste water treatment and in other applications.
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公开(公告)号：US4144207A
公开(公告)日：1979-03-13
申请号：US864415
申请日：1977-12-27
申请人： Roger W. Ohnsorg
发明人： Roger W. Ohnsorg
IPC分类号： C04B35/638 , C04B35/00 , C04B35/565 , C04B35/632 , C04B35/634 , C08L91/00
CPC分类号： C04B35/63404 , C04B35/565 , C04B35/632 , C04B35/634 , C04B35/63432
摘要： Ceramic compositions that may be injection molded and subsequently sintered are described. A particulate ceramic material, such as silicon carbide, is coated with a mixture of thermoplastic resin and oils or waxes, and utilized as a feed material in an injection molding process. The molded product may subsequently be sintered at 2000.degree. C. to 2200.degree. C. to produce a hard, dense article.
摘要翻译： 描述可以进行注塑和随后烧结的陶瓷组合物。 颗粒状陶瓷材料，例如碳化硅，用热塑性树脂和油或蜡的混合物涂覆，并用作注射成型工艺中的进料。 随后可以将模制产品在2000℃至2200℃下烧结以产生硬的致密制品。
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89.发明授权
公开(公告)号：US4144193A
公开(公告)日：1979-03-13
申请号：US884084
申请日：1978-03-06
申请人： Hari N. Murty
发明人： Hari N. Murty
摘要： Granular activated carbon is manufactured from sub-bituminous coal by crushing and screening the as received coal containing about 10 to about 25% moisture by weight to produce 8/30 mesh granules, treating the granules with a dilute aqueous solution of inorganic acid at a concentration from about 1 to about 25% by weight to reduce the volatile content and thereby increase the fixed carbon content, the particular concentration being selected to provide the desired activity and porosity of the activated carbon, comprising: mixing the granules with the acid, washing off the acid, and drying the granules at least partially to a moisture content below about 25% by weight. The granules are mixed with from 0 to about 15% by weight of coal tar pitch. The so treated granules are ground to form fine powder of not less than about 60% by weight -325 mesh, preferably more than about 65% by weight -325 mesh, which is compressed into shapes, such as pellets or thin corrugated sheets under high pressure, and then granulated to reform 6/20 mesh granules. These reformed granules are devolatilized, without prior charring, by directly heating to and at a temperature higher than the charring temperature in an oxygen-free atmosphere, and then activated by heating to and at a temperature higher than the devolatilizing temperature in an atmosphere containing a gaseous activating agent.
摘要翻译： 颗粒状活性炭是由次烟煤制成，通过粉碎和筛选含有约10至约25重量％水分的接收煤以产生8/30目颗粒，用浓度为无机酸的稀水溶液处理颗粒 约1至约25重量％以减少挥发物含量，从而增加固定碳含量，选择特定浓度以提供活性炭的所需活性和孔隙率，包括：将颗粒与酸混合，洗涤 酸，并将颗粒至少部分干燥至含水量低于约25重量％。 颗粒与0至约15重量％的煤焦油沥青混合。 将如此处理的颗粒研磨以形成不小于约60重量％-325目，优选大于约65重量％-325目的细粉末，其被压缩成高度的形状，例如颗粒或薄波纹片 压力，然后造粒以改造6/20目的颗粒。 这些重整的颗粒在无氧气氛中直接加热至高于焦化温度的温度，通过加热至高于脱挥发分温度的温度，在含有 气态活化剂。
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公开(公告)号：US4135937A
公开(公告)日：1979-01-23
申请号：US783140
申请日：1977-03-31
IPC分类号： C04B35/565 , C04B35/575 , C04B35/56
CPC分类号： C04B35/575
摘要： A method for making a dense thermal shock resistant silicon carbide ceramic body by hot pressing a blend of silicon carbide and from about 0.2 to about 2 weight percent of aluminum diboride and the resulting body.
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