公开(公告)号：US4930731A

公开(公告)日：1990-06-05

申请号：US363355

申请日：1989-06-02

申请人： Donald W. Roy ,  James L. Hastert

发明人： Donald W. Roy ,  James L. Hastert

IPC分类号： C04B35/443 ,  F42B10/46 ,  F42B15/34 ,  H01Q1/42 ,  F41G7/26 ,  B29D11/00 ,  C04B35/62 ,  F42C19/04

CPC分类号： F42B10/46 ,  C04B35/443 ,  C04B35/645 ,  C04B35/6455 ,  F42B15/34 ,  H01Q1/42 ,  C04B2235/3203 ,  C04B2235/3206 ,  C04B2235/3217 ,  C04B2235/3418 ,  C04B2235/445 ,  C04B2235/5409 ,  C04B2235/5445 ,  C04B2235/6565 ,  C04B2235/6567 ,  C04B2235/661 ,  C04B2235/668 ,  C04B2235/72 ,  C04B2235/721 ,  C04B2235/726 ,  C04B2235/78 ,  C04B2235/79 ,  C04B2235/94 ,  C04B2235/96 ,  C04B2235/9653

摘要： A dome and window for missiles and launch tubes is provided having high ultraviolet transmittance and high strength properties. The domes and windows have, in their uncoated state, and with a thickness of about 1.88 mm, a transmittance greater than about 80%, preferably greater than about 82%, and more preferably greater than about 85%, at a wavelength of 0.4 microns to 0.5 microns. The domes and windows preferably have a transmittance per 1.88 mm thickness at all wavelengths in the wavelength range between 3.0 microns and 4.0 microns of at least about 81%. The domes and windows have a flexural strength of at least about 20,000 psi and a knoop hardness of at least about 1350 kg mm.sup.-2. The domes and windows are formed of a transparent, sintered polycrystalline magnesia-alumina spinel. The polycrystalline sintered spinel is formed in a two-step process comprising forming a closed porosity body such as by hot-pressing or pressureless sintering followed by a hot isostatic pressure treatment step to reduce residual porosity to less than about 0.001 percent.

摘要翻译： 提供了具有高紫外线透射率和高强度特性的导弹和发射管的圆顶和窗。 穹顶和窗户在其未涂覆状态下具有约1.88mm的厚度，在0.4微米的波长处的透射率大于约80％，优选大于约82％，更优选大于约85％ 至0.5微米。 圆顶和窗户优选在3.0微米至4.0微米之间的波长范围内的所有波长处的厚度为1.88毫米的透射率为至少约81％。 穹顶和窗户的弯曲强度至少约为20,000psi，而knoop硬度至少约为1350kg / mm 2。 圆顶和窗户由透明烧结的多晶氧化镁 - 氧化铝尖晶石形成。 多晶烧结尖晶石是以两步法形成的，包括通过热压或无压烧结形成封闭的孔隙体，然后进行热等静压处理步骤，以将残余孔隙率降低到小于约0.001％。

公开(公告)号：US5244849A

公开(公告)日：1993-09-14

申请号：US47428

申请日：1987-05-06

申请人： Donald W. Roy ,  James L. Hastert ,  Lawrence E. Coubrough ,  Kenneth E. Green ,  Aurelio Trujillo

发明人： Donald W. Roy ,  James L. Hastert ,  Lawrence E. Coubrough ,  Kenneth E. Green ,  Aurelio Trujillo

IPC分类号： C04B35/443 ,  H01Q1/42

CPC分类号： H01Q1/42 ,  C04B35/443

摘要： A method for producing a transparent polycrystalline magnesia-alumina spinel body having high ultraviolet transmissivity and high strength and hardness characteristics is provided. A closed porosity body is formed from a spinel powder preferably having at least minimum purity characteristics. The closed porosity body can be formed by techniques including hot pressing and pressureless sintering. The closed porosity body is subjected to a hot isostatic pressure treatment to reduce residual porosity. The resulting body has high transmissivity of electro-magnetic radiation in the range between about 0.2 microns and about 6 microns and is resistant to abrasion or erosion, has high strength, and does not substantially deteriorate after exposure to ultraviolet light.

摘要翻译： 提供了具有高紫外线透射率和高强度和硬度特性的透明多晶氧化镁 - 氧化铝尖晶石体的制造方法。 封闭的孔隙体由优选具有至少最小纯度特性的尖晶石粉末形成。 封闭的孔隙体可以通过包括热压和无压烧结在内的技术形成。 对封闭的孔隙体进行热等静压处理以减少残余孔隙率。 所得体的电磁辐射的透射率在约0.2微米至约6微米之间的范围内，并且耐磨损或侵蚀，具有高强度，并且在暴露于紫外线之后基本上不会劣化。

公开(公告)号：US5082739A

公开(公告)日：1992-01-21

申请号：US184729

申请日：1988-04-22

申请人： Donald W. Roy ,  James L. Hastert ,  Kenneth E. Green ,  Lawrence E. Courbrough ,  Aurielo Trujillo

发明人： Donald W. Roy ,  James L. Hastert ,  Kenneth E. Green ,  Lawrence E. Courbrough ,  Aurielo Trujillo

IPC分类号： C04B35/44 ,  C04B35/645 ,  C04B41/51 ,  C04B41/88

CPC分类号： C04B41/009 ,  C04B35/44 ,  C04B35/645 ,  C04B41/5133 ,  C04B41/515 ,  C04B41/88 ,  C04B2111/80 ,  Y10S428/918

摘要： A metallized spinel material and a method for producing a metallized spinel material are provided. The spinel is a high-transmissive material and, particularly, has high transmission in the ultraviolet and, preferably, the visible infrared wavelength regions as well. The high-transmissivity spinel material is metallized by applying the slurry containing a metal, such as tungsten, molybdenum and/or manganese to the substrate, and firing at en elevated temperature such as 1200.degree. to 1800.degree. C., preferably 1500.degree. to 1800.degree. C. for about 1/2 hour in a non-oxidizing atmosphere.

摘要翻译： 提供金属化尖晶石材料和金属化尖晶石材料的制造方法。 尖晶石是高透光性的材料，特别是在紫外线，优选可见红外波长区域也具有高透射率。 通过将含有诸如钨，钼和/或锰的金属的浆料施加到基底上并在升高的温度例如1200℃至1800℃，优选1500℃至1800℃下进行烧制，将高透光尖晶石材料进行金属化 在非氧化气氛中进行约1/2小时。

公开(公告)号：US5001093A

公开(公告)日：1991-03-19

申请号：US374637

申请日：1989-06-30

申请人： Donald W. Roy ,  James L. Hastert

发明人： Donald W. Roy ,  James L. Hastert

IPC分类号： C04B35/443 ,  H01Q1/42

CPC分类号： C04B35/443 ,  H01Q1/42

摘要： A transparent polycrystalline body having high ultraviolet transmissivity is provided. The body is preferably a sintered magnesia-alumina spinel body having a transmittance of at least 85 percent in the wavelength range from 0.3 microns to 0.8 microns and a transmittance at some wavelength in the wave length range between about 0.2 and about 0.4 microns of at least about 86 percent and a porosity of less than about 0.001 percent. The sintered body is produced by a two-step method comprising forming a closed porosity body from a spinel powder and subjecting the closed porosity body to a hot isostatic pressure treatment. The resulting body has high transmissivity of electromagnetic radiation in the range between about 0.2 microns and about 6 microns, is resistant to abrasion or erosion, does not substantially deteriorate after exposure to ultraviolet light, and has high strength.

摘要翻译： 提供了具有高紫外线透射率的透明多晶体。 本体优选为在0.3微米至0.8微米的波长范围内具有至少85％的透射率的烧结的氧化镁 - 氧化铝尖晶石体，并且至少在波长为约0.2至约0.4微米的波长范围内的透射率为至少 约86％，孔隙率小于约0.001％。 烧结体通过两步法制造，包括从尖晶石粉末形成封闭的孔隙体，并对封闭的孔隙体进行热等静压处理。 所得体的电磁辐射的透射率在约0.2微米至约6微米之间的范围内，耐磨损或侵蚀，在暴露于紫外线后基本上不会劣化，并具有高强度。

公开(公告)号：US4983555A

公开(公告)日：1991-01-08

申请号：US185189

申请日：1988-04-22

申请人： Donald W. Roy ,  James L. Hastert

发明人： Donald W. Roy ,  James L. Hastert

IPC分类号： C04B35/443 ,  H01Q1/42 ,  C04B35/02

CPC分类号： H01Q1/42 ,  C04B35/443

摘要： A transparent polycrystalline body having high ultraviolet transmissivity is provided. The body is preferably a sintered magnesia-alumina spinel body having a transmittance of at least 85 percent in the wavelength range from 0.4 microns to 0.8 microns and a transmittance at some wavelength in the wavelength range between about 0.2 and about 0.4 microns of at least about 86 percent and a porosity of less than about 0.001 percent. The sintered body is produced by a two-step method comprising forming a closed porosity body from a spinel powder and subjecting the closed porosity body to a hot isostatic pressure treatment. The resulting body has high transmissivity of electromagnetic radiation in the range between about 0.2 microns and about 6 microns, is resistant to abrasion or erosion, does not substantially deteriorate after exposure to ultraviolet light, and has high strength. A number of applications of the magnesia-alumina spinel body are disclosed for which the material is advantageous.

摘要翻译： 提供了具有高紫外线透射率的透明多晶体。 本体优选为在0.4微米至0.8微米的波长范围内具有至少85％透射率的烧结氧化镁 - 氧化铝尖晶石体，并且在约0.2至约0.4微米的波长范围内的某些波长的透光率为至少约 86％，孔隙度小于约0.001％。 烧结体通过两步法制造，包括从尖晶石粉末形成封闭的孔隙体，并对封闭的孔隙体进行热等静压处理。 所得体的电磁辐射的透射率在约0.2微米至约6微米之间的范围内，耐磨损或侵蚀，在暴露于紫外线后基本上不会劣化，并具有高强度。 公开了氧化镁 - 氧化铝尖晶石体的许多应用，其材料是有利的。