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公开(公告)号:US5565245A
公开(公告)日:1996-10-15
申请号:US396242
申请日:1995-03-01
申请人: Tawei Sun , Nancy R. Brown , Jesse J. Brown, Jr. , Min Kang
发明人: Tawei Sun , Nancy R. Brown , Jesse J. Brown, Jr. , Min Kang
CPC分类号: C01G23/003 , C04B35/478 , C04B35/6264 , C04B41/009 , C04B41/5041 , C04B41/87 , C23C18/1216 , C23C18/1254 , C23C18/1283 , C23C18/1295 , C01P2006/22 , C01P2006/32 , C04B2235/3206 , C04B2235/441 , C04B2235/443 , C04B2235/656 , C04B2235/6562
摘要: Mg.sub.x Al.sub.2-2x Ti.sub.1+x O.sub.5 (x.ltoreq.0.2) protective coatings have been developed for both dense and porous substrates, such as SiC and Si.sub.3 N.sub.4, using a chemical solution processing method involving the hydrolysis and condensation of magnesium, aluminum and titanium precursors. The solution viscosities, pH values, H.sub.2 O/alkoxide molar ratios, and dip coating withdrawal rates which are optimum for crack-free Mg.sub.x Al.sub.2-2x Ti.sub.1+x O.sub.5 (x.ltoreq.0.2) are 1.0 to 6.2 cP, pH 1-4.5, molar ratio 1.5-10, and withdrawal rate of 2.2-8.0 cm/min, respectively. Conversion of the amorphous coating to crystalline Mg.sub.x Al.sub.2-2x Ti.sub.1+x O.sub.5 (x.ltoreq.0.2) is achieved by a succession of calcination below 450.degree. C. and a final heat treatment above 1000.degree. C. for ten hours with controlled heating and cooling rates.
摘要翻译: 使用涉及镁,铝和钛前体的水解和缩合的化学溶液处理方法,已经开发了用于密实和多孔基材例如SiC和Si 3 N 4的Mg x Al 2 2- x Ti 1 + x O 5(x <0.2)保护涂层。 对于无裂纹MgxAl2-2xTi1 + xO5(x <= 0.2)最适合的溶液粘度,pH值,H 2 O /醇盐摩尔比和浸涂速率为1.0〜6.2cP,pH 1-4.5,摩尔比 1.5-10,脱水率分别为2.2-8.0 cm / min。 将无定形涂层转化为结晶Mg x Al 2 2- x Ti 1 + x O 5(x <= 0.2)通过在450℃以下的连续煅烧和在1000℃以上的最终热处理10小时达到控制加热和冷却速率 。
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公开(公告)号:US5407479A
公开(公告)日:1995-04-18
申请号:US98202
申请日:1993-07-28
申请人: Tawei Sun , Nancy R. Brown , Jesse J. Brown, Jr.
发明人: Tawei Sun , Nancy R. Brown , Jesse J. Brown, Jr.
CPC分类号: C04B41/87 , C01G23/003 , C04B35/478 , C04B35/6264 , C04B41/009 , C04B41/5041 , C23C18/1216 , C23C18/1254 , C23C18/1283 , C23C18/1295 , C01P2006/22 , C01P2006/32 , C04B2235/3206 , C04B2235/441 , C04B2235/443 , C04B2235/656 , C04B2235/6562
摘要: .beta.-Al.sub.2 TiO.sub.5 protective coatings have been developed for both dense and porous ceramics such as SiC and Si.sub.3 N.sub.4 using a chemical solution processing method involving the hydrolysis and condensation of aluminum tri-sec butoxide and titanium butoxide. The solution viscosities, pH values, H.sub.2 O/alkoxide molar ratios, and dip coating withdrawal rates required for crack-free .beta.-Al.sub.2 TiO.sub.5 are 1.0 to 6.2 cP, pH 1-4.5, molar ratio 1.5-10, and withdrawal rate of 2.2-8.0 cm/min, respectively. Conversion of the amorphous coating to crystalline .beta.-Al.sub.2 TiO.sub.5 is achieved by a succession of calcination below 450.degree. C. and a final heat-treatment at 1300.degree. C. for ten hours with controlled heating and cooling rates.
摘要翻译: 已经开发了用于致密和多孔陶瓷如SiC和Si 3 N 4的β-Al 2 TiO 5保护涂层,其使用涉及三仲丁醇铝和丁醇钛的水解和缩合的化学溶液处理方法。 无裂纹β-Al2TiO5所需的溶液粘度,pH值,H 2 O /醇盐摩尔比和浸涂速率为1.0〜6.2cP,pH 1-4.5,摩尔比为1.5-10,脱水率为2.2〜8.0 cm / min。 无定形涂层转变成结晶β-Al2TiO5是通过在450℃以下的连续焙烧实现的,并在1300℃下进行最终的热处理10小时,同时控制加热和冷却速率。
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公开(公告)号:US5354363A
公开(公告)日:1994-10-11
申请号:US95794
申请日:1993-07-22
CPC分类号: B01D47/021 , B01D53/02 , B01D53/34 , Y10S75/961
摘要: A scrubber for industrial exhaust systems advantageously employs liquid gallium to adsorb vapor phase mercury as well as sub-micron sized particulates such as other trace metal constituents from a hot gas exhaust stream in an industrial exhaust system. The temperature of the liquid gallium is elevated for optimum adsorption efficiency, and subsequently lowered to separate the adsorbed mercury and other species.
摘要翻译: 用于工业排气系统的洗涤器有利地使用液体镓从工业排气系统中的热气体排出流中吸附气相汞以及亚微米级的颗粒,例如其它痕量金属成分。 液体镓的温度升高以获得最佳吸附效率,随后降低以分离吸附的汞和其它物质。
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