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22 条记录 (耗时 0.032 秒)

    Method of sintering translucent alumina
    12.
    发明授权
    Method of sintering translucent alumina 失效
    烧结半透明氧化铝的方法

    公开(公告)号：US4762655A

    公开(公告)日：1988-08-09

    申请号：US802414

    申请日：1985-11-27

    申请人： William H. Rhodes ,  George C. Wei ,  George A. Fryburg

    发明人： William H. Rhodes ,  George C. Wei ,  George A. Fryburg

    IPC分类号： C04B35/111 ,  C04B35/10

    CPC分类号： C04B35/111 ,  Y10S264/91

    摘要： An improved process for producing a translucent polycrystalline alumina body comprising sintering a prefired compacted green body of alumina of predetermined shape is disclosed. The green body of alumina includes alumina doped with one or more sintering aids. The method of the present invention comprises sintering the prefired compacted green body of predetermined shape at a maximum sintering temperature in an atmosphere containing nitrogen and an amount of hydrogen greater than or equal to about 2.5 volume percent and less than 75 volume percent for a period of time sufficient to produce a translucent polycrystalline alumina body.

    摘要翻译： 公开了一种用于制造半透明多晶氧化铝体的改进方法，其包括烧结预制的压缩的预定形状的氧化铝生坯体。 氧化铝的生坯体包括掺有一种或多种烧结助剂的氧化铝。 本发明的方法包括在包含氮气和大于或等于约2.5体积％且小于75体积％的氢气的量的最大烧结温度下烧结预定形状的预制压实生坯，持续一段时间 足以产生半透明的多晶氧化铝体。

    Transparent yttria ceramics containing magnesia or magnesium aluminate
    13.
    发明授权
    Transparent yttria ceramics containing magnesia or magnesium aluminate 失效
    含氧化镁或铝酸镁的透明氧化钇陶瓷

    公开(公告)号：US4174973A

    公开(公告)日：1979-11-20

    申请号：US7097

    申请日：1979-01-29

    申请人： William H. Rhodes ,  F. Joseph Reid

    发明人： William H. Rhodes ,  F. Joseph Reid

    IPC分类号： C04B35/50 ,  C04B35/505

    CPC分类号： C04B35/505

    摘要： An article of manufacture comprising a substantially transparent high density polycrystalline yttria-based body consisting essentially of yttria and from 0.1 to 5 wt. % MgO or from 0.1 to 5 wt. % MgAl.sub.2 O.sub.4.Transparent yttria-based bodies according to this invention are particularly useful as envelopes for high pressure sodium vapor lamps.

    摘要翻译： 一种制造品，其包括基本上透明的基于氧化钇的高密度多晶氧化钇基体，和0.1至5wt。 ％MgO或0.1〜5wt。 ％MgAl2O4。 根据本发明的透明氧化钇基体作为高压钠蒸汽灯的信封是特别有用的。

    Transparent yttria ceramics and method for producing same
    14.
    发明授权
    Transparent yttria ceramics and method for producing same 失效
    透明氧化钇陶瓷及其制造方法

    公开(公告)号：US4115134A

    公开(公告)日：1978-09-19

    申请号：US814341

    申请日：1977-07-11

    申请人： William H. Rhodes

    发明人： William H. Rhodes

    IPC分类号： C04B35/50 ,  C04B35/505

    CPC分类号： C04B35/505

    摘要： An article of manufacture is provided comprising a substantially transparent high density polycrystalline yttriabase body consisting essentially of yttria and from about 6 to 14 mole percent lanthana.A method for preparing the transparent yttria doped with lanthana is also provided comprising admixing or co-precipitating lanthana or a precursor thereof with yttria or a precursor thereof, washing, drying and screening the mixture, calcining the admixed or co-precipitated powders, pressing the calcined powders into a desired shape and thereafter sintering the shaped powder for from about 1/6 to 6 hours at a temperature above the H-phase transition and for from about 1/2 to 6 hours at a temperature below the H to C phase transition, said sintering being effected at a sufficiently low oxygen atmosphere to prevent oxidative contaminants.

    摘要翻译： 提供了一种制造物品，其包括基本上由氧化钇和约6至14摩尔百分数的氧化镧组成的基本上透明的高密度多晶氧化铝基体。

    Cutting tool blank
    15.
    发明授权
    Cutting tool blank 失效
    切削工具坯料

    公开(公告)号：US3954930A

    公开(公告)日：1976-05-04

    申请号：US079676

    申请日：1970-10-09

    申请人： Thomas Vasilos ,  William H. Rhodes ,  John E. Niesse

    发明人： Thomas Vasilos ,  William H. Rhodes ,  John E. Niesse

    IPC分类号： C04B35/111 ,  B24D3/06

    CPC分类号： C04B35/111

    摘要： The present invention is directed to an improved cutting tool blank formed by hot pressing a mixture of finely divided high-purity alumina and from about 0.05% to 0.35% of magnesia. Up to 0.10% nickel oxide may be present. The hot pressing temperatures are effected at a temperature in the range of about 1300.degree.C to 1525.degree.C so that the crystal size of the alumina in the tool blank has an average size range from 1 to 2 microns and the pressed blank has a final product density in excess of 3.97 grams per cubic centimeter. The preferred density of the blank is in excess of 3.98 grams per cubic centimeter. The hot pressing is conducted under vacuum conditions.

    摘要翻译： 本发明涉及一种改进的切削工具坯料，其通过热压细碎的高纯度氧化铝和约0.05％至0.35％的氧化镁的混合物而形成。 可能存在高达0.10％的氧化镍。 热压温度在约1300℃至1525℃的温度下进行，使得工具坯料中的氧化铝的晶体尺寸的平均尺寸范围为1至2微米，压制坯料具有最终的 产品密度超过3.97克/立方厘米。 坯料的优选密度超过3.98克/立方厘米。 热压在真空条件下进行。

    SINTERED POLYCRYSTALLINE TERBIUM ALUMINUM GARNET AND USE THEREOF IN MAGNETO-OPTICAL DEVICES
    17.
    发明申请
    SINTERED POLYCRYSTALLINE TERBIUM ALUMINUM GARNET AND USE THEREOF IN MAGNETO-OPTICAL DEVICES 失效
    烧结多晶硅铝合金GARNET及其在磁光设备中的应用

    公开(公告)号：US20090011924A1

    公开(公告)日：2009-01-08

    申请号：US12210549

    申请日：2008-09-15

    申请人： Yin Tang ,  Anthony C. Sutorik ,  Long Nguyen ,  Tom Hinklin ,  William H. Rhodes ,  David Scerbak

    发明人： Yin Tang ,  Anthony C. Sutorik ,  Long Nguyen ,  Tom Hinklin ,  William H. Rhodes ,  David Scerbak

    IPC分类号： C04B35/50

    CPC分类号： C04B35/50 ,  B82Y30/00 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/764 ,  C04B2235/781 ,  C04B2235/9653 ,  C09K11/7749

    摘要： A composition is provided that includes a plurality of calcined particles of terbium aluminum oxide having a mean particle domain size of between 30 and 600 nanometers. A translucent article having a surface includes polycrystalline terbium aluminum garnet having a mean grain size from 1 to 10 microns and light scattering inclusions of aluminum-rich oxide and/or terbium-rich oxide that are present at less than 2 surface area percent of the surface. A process for forming such an article involves sintering the above provided composition at a temperature between 1500° C. and 1700° C. to yield a sintered article. The article has improved translucency and even transparency as sintering is performed under vacuum at a temperature between 1610° C. and 1680° C. Hot isostatic pressing alone or in combination with article polishing also improves article translucency.

    摘要翻译： 提供了一种组合物，其包括多个平均粒子域尺寸在30和600纳米之间的氧化铽的煅烧颗粒。 具有表面的半透明制品包括平均粒度为1至10微米的多晶铽铝石榴石和富含Al的氧化物和/或富含铽的氧化物的光散射夹杂物，其表面积小于2的表面积百分比 。 形成这种制品的方法包括在1500℃和1700℃之间的温度下烧结上述所提供的组合物，得到烧结制品。 该制品具有改善的半透明度和均匀的透明度，因为在1610℃和1680℃之间的温度下在真空下进行烧结。单独的热等静压或与制品抛光相结合也可改善制品半透明度。

    Sintered polycrystalline terbium aluminum garnet and use thereof in magneto-optical devices
    18.
    发明授权
    Sintered polycrystalline terbium aluminum garnet and use thereof in magneto-optical devices 失效
    烧结多晶铽铝石榴石及其在磁光装置中的应用

    公开(公告)号：US07427577B2

    公开(公告)日：2008-09-23

    申请号：US11399198

    申请日：2006-04-06

    申请人： Yin Tang ,  Anthony C. Sutorik ,  Long Nguyen ,  Tom Hinklin ,  William H. Rhodes ,  David Scerbak

    发明人： Yin Tang ,  Anthony C. Sutorik ,  Long Nguyen ,  Tom Hinklin ,  William H. Rhodes ,  David Scerbak

    IPC分类号： C04B35/50

    CPC分类号： C04B35/50 ,  B82Y30/00 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/764 ,  C04B2235/781 ,  C04B2235/9653 ,  C09K11/7749

    摘要： A composition is provided that includes a plurality of calcined particles of terbium aluminum oxide having a mean particle domain size of between 30 and 600 nanometers. A translucent article having a surface includes polycrystalline terbium aluminum garnet having a mean grain size from 1 to 10 microns and light scattering inclusions of aluminum-rich oxide and/or terbium-rich oxide that are present at less than 2 surface area percent of the surface. A process for forming such an article involves sintering the above provided composition at a temperature between 1500° C. and 1700° C. to yield a sintered article. The article has improved translucency and even transparency as sintering is performed under vacuum at a temperature between 1610° C. and 1680° C. Hot isostatic pressing alone or in combination with article polishing also improves article translucency.

    摘要翻译： 提供了一种组合物，其包括多个平均粒子域尺寸在30和600纳米之间的氧化铽的煅烧颗粒。 具有表面的半透明制品包括平均粒度为1至10微米的多晶铽铝石榴石和富含Al的氧化物和/或富含铽的氧化物的光散射夹杂物，其表面积小于2的表面积百分比 。 形成这种制品的方法包括在1500℃和1700℃之间的温度下烧结上述所提供的组合物，得到烧结制品。 该制品具有改善的半透明度和均匀的透明度，因为在1610℃和1680℃之间的温度下在真空下进行烧结。单独的热等静压或与制品抛光相结合也可改善制品半透明度。

    Method of making translucent alumina articles
    19.
    发明授权
    Method of making translucent alumina articles 失效
    制作半透明氧化铝制品的方法

    公开(公告)号：US4948538A

    公开(公告)日：1990-08-14

    申请号：US255564

    申请日：1988-10-11

    申请人： George C. Wei ,  William H. Rhodes

    发明人： George C. Wei ,  William H. Rhodes

    IPC分类号： C04B35/115 ,  C04B35/64

    CPC分类号： C04B35/115 ,  C04B35/64 ,  Y10S264/91

    摘要： A method of making a translucent alumina article is described. The method comprises the following steps:Step 1 - An alumina powder and a sintering aid are mixed in a liquid for a period sufficient to form a homogeneous slurry.Step 2 - The homogeneous slurry from Step 1 is dried remove the liquid to form a dried powder.Step 3 - The dried powder is shaped to form a compacted green body.Step 4 - The compacted green body from Step 3 is heated at a temperature equal to or less than 500.degree. C. and for a period sufficient to form a compacted green body having a density of at least 30% of theoretical density.Step 5 - The compacted green body having a density of at least 30% of theoretical density from Step 4 is heated at a temperature from about 800.degree. C. to about 1300.degree. C. in an oxygen containing atmosphere for a period sufficient to impart green strength to said compacted green body to form a prefired compacted green body.Step 6 - The prefired compacted green body from Step 5 is sintered at a temperature from about 1700.degree. C., to about 2000.degree. C. in an nitrogen/hydrogen atmosphere consisting essentially of nitrogen and hydrogen for a period sufficient to form a translucent polycrystalline alumina article, the hydrogen being equal to or greater than about one volume percent of said nitrogen/hydrogen atmosphere and having a dew point in the range of minus 15.degree. C. to about minus 110.degree. C.

    摘要翻译： 描述制造半透明氧化铝制品的方法。 该方法包括以下步骤：步骤1 - 将氧化铝粉末和烧结助剂在液体中混合足够长的时间以形成均匀的浆料。 步骤2 - 将来自步骤1的均匀浆料干燥除去液体以形成干燥的粉末。 步骤3 - 将干燥的粉末成型为形成压实的生坯。 步骤4 - 将来自步骤3的压实的生坯在等于或低于500℃的温度下加热足够长的时间以形成密度为理论密度的至少30％的压实生坯。 步骤5 - 将密度为至少30％理论密度的压实生坯从步骤4在含氧气氛中在约800℃至约1300℃的温度下加热足以赋予绿色 强度对所述压实的生坯以形成预制压实的生坯。 步骤6 - 步骤5的预烧结的压实生坯在约1700℃至约2000℃的温度下在基本上由氮和氢组成的氮/氢气氛中烧结足以形成半透明多晶 氧化铝制品，氢等于或大于所述氮/氢气氛的约1体积％，露点在-15℃至约-100℃的范围内。

    Rapid-sintering of alumina
    20.
    发明授权
    Rapid-sintering of alumina 失效
    氧化铝的快速烧结

    公开(公告)号：US4797238A

    公开(公告)日：1989-01-10

    申请号：US053501

    申请日：1987-05-12

    申请人： William H. Rhodes ,  George C. Wei ,  George A. Fryburg

    发明人： William H. Rhodes ,  George C. Wei ,  George A. Fryburg

    IPC分类号： C04B35/115 ,  C04B35/64 ,  C04B35/10

    CPC分类号： C04B35/64 ,  C04B35/115 ,  Y10S264/91

    摘要： An improved process for producing a translucent polycrystalline alumina body comprising rapid-sintering a prefired compacted green body of alumina of predetermined shape is disclosed. The green body of alumina includes alumina doped with one or more sintering aids. Rapid sintering in accordance with the method of the present invention comprises the steps of raising the temperature of the prefired compacted green body of predetermined shape up to maximum sintering temperature at a heating rate greater than or equal to about 0.1.degree. C./second and less than the rate at which the green body experiences thermal shock; and heating the green body at the maximum sintering temperature for a period of time sufficient to produce a translucent polycrystalline alumina body. The rapid sintering is carried out under a flowing gas mixture of nitrogen and at least about 2.5 volume percent hydrogen.

    摘要翻译： 公开了一种用于生产半透明多晶氧化铝体的改进方法，其包括快速烧结具有预定形状的预烧成型的氧化铝生坯。 氧化铝的生坯体包括掺有一种或多种烧结助剂的氧化铝。 根据本发明的方法的快速烧结包括以下步骤：以大于或等于约0.1℃/秒以下的加热速率将预定形状的预烧成型的生坯体的温度升高到最大烧结温度 比体温发生热休克的速度要快; 并在最高烧结温度下加热生坯一段足以产生半透明多晶氧化铝体的时间。 快速烧结在氮气流动的气体混合物和至少约2.5体积％的氢气下进行。