专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4048119A Heating element composition and method for preparing tube fillings of high electrical resistance from fused magnesium oxide for tubular electric heating elements 失效
标题翻译：用于管状电加热元件的熔融氧化镁制备高电阻管填料的加热元件组合物和方法
公开(公告)号：US4048119A
公开(公告)日：1977-09-13
申请号：US691956
申请日：1976-06-01
申请人： Gerd-Edzard Bockstiegel , Manfred Neidhardt , Gerhard Rehfeld
发明人： Gerd-Edzard Bockstiegel , Manfred Neidhardt , Gerhard Rehfeld
IPC分类号： H01B3/10 , H01C7/00 , H05B3/48 , H01B1/08
CPC分类号： H05B3/48 , H01B3/10
摘要： An electrical heating element composition comprising crystals of fused magnesium oxide improved by the inclusion of 0.05 to 5% by weight, based on the weight of said fused magnesium oxide, of an additive composition which has excellent lubricating properties in respect of the magnesium oxide crystals and reacts at 800.degree. to 1050.degree. C with active conductivity centers at the surface of one or more adjacent magnesium oxide crystals; an improvement in the preparation of an electrical heating element wherein a granular fused magnesium oxide composition is subjected to mechanical shaping and calcination which comprises employing as the electrical heating element composition a composition comprising crystals of fused magnesium oxide and 0.05 to 5% by weight, based on the weight of said fused magnesium oxide, of an additive composition which has excellent lubricating properties in respect of the magnesium oxide crystals and reacts at 800.degree. to 1050.degree. C with the active conductivity centers at the surface of one or more adjacent magnesium oxide crystals.
摘要翻译：一种包含熔融氧化镁晶体的电加热元件组合物，其通过以所述熔融氧化镁的重量计包含0.05至5重量％的添加剂组合物，所述添加剂组合物相对于氧化镁晶体具有优异的润滑性能，在一个或多个相邻的氧化镁晶体的表面处，在800至1050℃的反应中具有活性导电中心; 对电加热元件的制备进行改进，其中对颗粒状熔融氧化镁组合物进行机械成型和煅烧，该方法包括使用包含熔融氧化镁晶体和0.05-5重量％基础的组合物作为电加热元件组合物关于所述熔融氧化镁的重量，添加剂组合物相对于氧化镁晶体具有优异的润滑性能，并在800至1050℃下与一个或多个相邻的氧化镁晶体的表面上的活性导电中心反应。

2. 发明授权

US4177235A Method of manufacturing electrically fused corundum 失效
标题翻译：制造电熔刚玉的方法
公开(公告)号：US4177235A
公开(公告)日：1979-12-04
申请号：US860525
申请日：1977-12-14
申请人： Manfred Neidhardt , Gerhard Rehfeld
发明人： Manfred Neidhardt , Gerhard Rehfeld
IPC分类号： C01F7/02 , C01F7/46 , C04B35/107 , C09K3/14 , C04B35/10
CPC分类号： C09K3/1427 , C01F7/46 , C04B35/107 , C01P2002/02 , C01P2004/61 , C01P2006/36
摘要： A composition comprising .alpha.-alumina in a concentration of at least 99.95 weight percent and process for producing such .alpha.-alumina wherein alumina having an alkali metal content between 0.05 and 0.60 weight percent and Al.sub.2 O.sub.3 content of more than 95 weight percent is electrically fused with silica and additional alkali, if desired, in an electric arc furnace, the heated composition is cooled, comminuted and the so-formed glass phase is removed from an alumina containing phase by mechanical or chemical means.
摘要翻译：一种组合物，其包含浓度至少为99.95重量％的α-氧化铝和用于生产这种α-氧化铝的方法，其中碱金属含量为0.05-0.60重量％和Al 2 O 3含量大于95重量％的氧化铝与二氧化硅电融合和另外的碱，如果需要，在电弧炉中，将加热的组合物冷却，粉碎，并通过机械或化学方法从含氧化铝的相中除去如此形成的玻璃相。

3. 发明授权

US4049397A Process for the preparation of granulated abrasives from fused or sintered refractory inorganic hard substances having a high grain toughness 失效
$Process for the preparation of granulated abrasives from fused or sintered refractory inorganic hard substances having a high grain toughness$
标题翻译：从具有高晶粒韧性的熔融或烧结耐火无机硬物质制备造粒磨料的方法
公开(公告)号：US4049397A
公开(公告)日：1977-09-20
申请号：US568642
申请日：1975-04-16
申请人： Gerd-Edzard Bockstiegel , Manfred Neidhardt , Gerhard Rehfeld , Werner Umlauf
发明人： Gerd-Edzard Bockstiegel , Manfred Neidhardt , Gerhard Rehfeld , Werner Umlauf
IPC分类号： B02C17/00 , B24D3/00 , C09K3/14
CPC分类号： C09K3/1409
摘要： A process for the manufacture of granular abrasives having improved grain toughness from refractory, inorganic hard substances which comprises crushing a lump or block of said refractory inorganic substance, thereafter subjecting the resultant grains to a grind sorting process such that substantially only the porous grains, grains containing flaws or coarsely crystalline grains are comminuted and separating them in the ground condition from the balance of the material.
摘要翻译：一种用于制造具有从耐火材料，无机硬质物质提高晶粒韧性的颗粒磨料的方法，其包括粉碎所述耐火无机物质的块状物或块状物，然后对所得颗粒进行研磨分选过程，使得仅基本上仅将多孔颗粒，颗粒将含有瑕疵或粗晶粒粉碎并在地面条件下将其与材料的余量分离。

4. 发明授权

US4472173A Ceramic-coated corundum abrasive grain 失效
标题翻译：陶瓷涂层刚玉磨粒
公开(公告)号：US4472173A
公开(公告)日：1984-09-18
申请号：US440394
申请日：1982-11-09
申请人： Klaus Bruning , Gerhard Rehfeld
发明人： Klaus Bruning , Gerhard Rehfeld
IPC分类号： C09K3/14
CPC分类号： C09K3/1436
摘要： In corundum abrasive grain which is ceramically coated with ground frit, a binder and fine grain highly abrasive material for the purpose of improving adhesion of the abrasive grain in its processing to resin-bonded abrasives and their use in wet grinding. The fine grain material forms from 1 to 5 weight percent of the untreated corundum grain and ranges in size from 10 to 50 microns, which corresponds to from 1 to 10 percent of the average diameter of the initial grain.
摘要翻译：在用磨料玻璃料陶瓷涂覆的刚玉磨料颗粒中，粘合剂和细晶粒高度研磨材料，用于改善磨料颗粒在其加工中与树脂粘合的研磨剂的粘合性及其在湿磨中的用途。细晶粒材料形成未经处理的刚玉晶粒的1至5重量％，其尺寸范围为10至50微米，其对应于初始晶粒的平均直径的1至10％。

5. 发明授权

US5261930A Polycrystalline, sintered abrasive granules based on .alpha.-Al.sub.2 O.sub . 失效
标题翻译：基于α-Al2O3工艺的多晶烧结磨料颗粒的生产及其应用
公开(公告)号：US5261930A
公开(公告)日：1993-11-16
申请号：US873145
申请日：1992-04-24
申请人： Christine Fliedner , Gerhard Rehfeld , Dietrich Maschmeyer
发明人： Christine Fliedner , Gerhard Rehfeld , Dietrich Maschmeyer
IPC分类号： C04B35/111 , C04B35/624 , C09K3/14 , B24D3/00
CPC分类号： C04B35/1115 , C04B35/624 , C09K3/1418
摘要： The invention relates to polycrystalline, sintered abrasive granules based on .alpha.-Al.sub.2 O.sub.3 with a density of >98% of the theoretical density of corundum, a Vickers hardness of 21 GPa and greater and a crystallite size of 0.05 to 1.3 micron, as well as abrasives made from these abrasive granules and the use of these abrasive granules for the production of ceramic, refractory products.The polycrystalline, sintered abrasive granules based on .alpha.-Al.sub.2 O.sub.3 are produced by .alpha.-Al.sub.2 O.sub.3 crystal nuclei being added to a boehmite dispersion, the mixture of the boehmite dispersion and the crystal nuclei being acidified and gelled and the gel being dried, crushed, and sintered. In doing so, 0.5 to 35% by weight of .alpha.-Al.sub.2 O.sub.3 crystal nuclei, relative to the sintered abrasive granules, is added and the mixture of the boehmite dispersion and of the crystal nuclei is refluxed, while the pH of the mixture is kept in a range of 2.5 to 3.5 by adding acid.
摘要翻译：本发明涉及基于α-Al 2 O 3的多晶烧结磨料颗粒，其密度为刚玉理论密度的98％，维氏硬度为21GPa以上，微晶尺寸为0.05至1.3微米，以及磨料由这些磨料颗粒制成，并使用这些磨料颗粒来生产陶瓷耐火产品。基于α-Al2O3的多晶烧结磨料颗粒由添加到勃姆石分散体中的α-Al 2 O 3晶核制成，勃姆石分散体和晶核的混合物被酸化和凝胶化，凝胶被干燥，粉碎和烧结。在这样做时，加入相对于烧结磨料颗粒的α-Al 2 O 3晶核的0.5至35重量％，将勃姆石分散体和晶核的混合物回流，同时将混合物的pH保持在通过加入酸的范围为2.5至3.5。

6. 发明授权

US4513089A Superrefractory dry ramming material based on zirconium oxide for the lining of induction-type crucible furnaces 失效
$Superrefractory dry ramming material based on zirconium oxide for the lining of induction-type crucible furnaces$
标题翻译：用于感应式坩埚炉内衬的氧化锆超耐火干夯料
公开(公告)号：US4513089A
公开(公告)日：1985-04-23
申请号：US545479
申请日：1983-10-25
申请人： Peter Kummer , Gerhard Rehfeld
发明人： Peter Kummer , Gerhard Rehfeld
IPC分类号： C04B35/482 , C04B35/66 , F27B14/10 , C04B35/48
CPC分类号： F27B14/10 , C04B35/482 , C04B35/66 , C04B2235/3244
摘要： A superrefractory dry ramming material based on zirconium oxide for the lining of induction-type crucible furnaces comprising a zirconium oxide low in SiO.sub.2 and conventionally stabilized with CaO, MgO, Y.sub.2 O.sub.3, rare earths or their mixed oxides which has a particle size ranging from 0 to 8 mm, and from 5 to 40 weight percent finely divided monoclinic, fused zirconium oxide containing less than 0.5 weight percent SiO.sub.2.
摘要翻译：一种用于感应式坩埚炉衬里的基于氧化锆的超级耐火干夯实材料，其包含低SiO 2的氧化锆，并且常规地用CaO，MgO，Y 2 O 3，稀土或其混合氧化物稳定，其具有0至 8重量％和5至40重量％的细小单斜晶系，含有小于0.5重量％SiO 2的熔融氧化锆。

7. 发明授权

US4472961A Apparatus for testing abrasive grains in single-grit scratch tests 失效
标题翻译：用于在单砂磨损试验中测试磨粒的装置
公开(公告)号：US4472961A
公开(公告)日：1984-09-25
申请号：US359970
申请日：1982-03-19
申请人： Gerhard Rehfeld , Klaus Steffens
发明人： Gerhard Rehfeld , Klaus Steffens
IPC分类号： G01N3/58 , G01N3/56
CPC分类号： G01N3/565 , G01N2203/0623
摘要： An apparatus adapted to be mounted on a surface grinding machine is provided for testing abrasive grains in single-grit scratch tests. To permit specimen preparation and scratching to be carried out on a single machine without changeover and without reclamping the specimen, and to maintain the infeed in the scratching operation constant by giving the specimen a contour corresponding to the cross-feed error, a belt grinder and a scratching device comprising a support disk, mounted by means of a main flange and a counterflange, and a scratching disk mounted on the main flange and carrying a single grain secured to its periphery along with a force-measuring system disposed thereunder, are designed as a structural unit adapted to be mounted on the spindle of the surface grinding machine, with a belt tensioning arm mounted to the headstock. The requisite natural frequency of the force-measuring system is obtained by locating a grain holder, a piezoelectric quartz crystal and a necked-down titanium bolt with rapid-acting tightening means on the rotating scratching disk beneath the abrasive grain.
摘要翻译：提供一种适用于安装在平面磨床上的设备，用于在单次磨痕测试中测试磨粒。为了允许在单个机器上进行样品准备和刮擦而不需要转换并且不使样品再次变亮，并且通过给予样品一个对应于交叉进给误差的轮廓，使划痕操作中的进给保持恒定，带式研磨机和包括通过主凸缘和反向凸缘安装的支撑盘的刮擦装置和安装在主凸缘上并且携带固定到其周边的单个颗粒以及设置在其周围的力测量系统的划痕盘被设计为适于安装在平面磨床的主轴上的结构单元，其中安装有头架的皮带张紧臂。力测量系统的必要固有频率是通过将具有快速紧固装置的谷物架，压电石英晶体和带有颈缩的钛螺栓定位在磨粒下方的旋转抓盘上来获得的。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式