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公开(公告)号：US5561833A
公开(公告)日：1996-10-01
申请号：US345690
申请日：1994-11-21
CPC分类号： H01J37/3426 , C22C32/0026 , C23C14/3414 , H01J37/3491 , B22F2998/00
摘要： To provide a raw material for high oxygen chromium targets containing oxygen in a form capable of effectively preventing the dust ejection phenomenon. A raw material for high oxygen chromium targets comprising chromium crystalline particles dispersed in metallic chromium wherein at least a portion of the surface of all the crystals constituting the oxide crystalline particles is in contact with the matrix of the metallic chromium. A method of producing a raw material for high oxygen chromium targets comprising chromium oxide crystalline particles dispersed in metallic chromium characterized by heat-treating metallic chromium containing a solid solution of oxygen or oxide particles as a starting material, and precipitating or crystal-growing the oxygen or oxide particles as chromium oxide crystalline particles having a particle size of 0.1 to 100 .mu.m, thereby obtaining a raw material for chromium targets.
摘要翻译： 为能够有效防止灰尘喷射现象的形式提供含有氧的高氧铬靶的原料。 一种用于高氧铬靶的原料，其包含分散在金属铬中的铬结晶颗粒，其中构成氧化物结晶颗粒的所有晶体的至少一部分表面与金属铬的基体接触。 一种生产高氧铬靶的原料的方法，其包括分散在金属铬中的氧化铬结晶颗粒，其特征在于，以含有氧或氧化物颗粒的固溶体为原料的金属铬进行热处理，并沉淀或晶体生长氧 或氧化物粒子作为氧化铬结晶粒子，其粒径为0.1〜100μm，得到铬靶材的原料。
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公开(公告)号：US5397373A
公开(公告)日：1995-03-14
申请号：US73711
申请日：1993-06-09
CPC分类号： H01J37/3426 , C22C32/0026 , C23C14/3414 , H01J37/3491
摘要： A raw material for high oxygen chromium targets comprising chromium crystalline particles dispersed in metallic chromium wherein at least a portion of the surface of all the crystals constituting the oxide crystalline particles is in contact with the matrix of said metallic chromium. And a method of producing a raw material for high oxygen chromium targets comprising chromium oxide crystalline particles dispersed in metallic chromium characterized by heat-treating metallic chromium containing a solid solution of oxygen or oxide particles as a starting material, and precipitating or crystal-growing the oxygen or oxide particles as chromium oxide crystalline particles having a particle size of 0.1 to 100, .mu.m, thereby obtaining a raw material for chromium targets.
摘要翻译： 一种用于高氧铬靶的原料，其包含分散在金属铬中的铬结晶颗粒，其中构成氧化物结晶颗粒的所有晶体的表面的至少一部分表面与所述金属铬的基体接触。 以及生产高氧铬靶的原料的方法，其包括分散在金属铬中的氧化铬结晶颗粒，其特征在于将含有氧或氧化物颗粒的固溶体作为起始材料的金属铬进行热处理，并使其沉淀或晶体生长 氧或氧化物颗粒作为氧化铬结晶颗粒，其粒径为0.1-100μm，从而获得铬靶材的原料。
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公开(公告)号：US5476248A
公开(公告)日：1995-12-19
申请号：US343970
申请日：1994-11-18
摘要： There is proposed a novel method for manufacturing high-purity metallic chromium that can eliminate the problems of reduced heating capability of the furnace, contamination of produced metallic chromium and other disadvantages related to the operation of the furnace. According to the invention, one or more than one of easily sulfidable metals selected from Sn, Ni and Cu are added to crude metallic chromium containing impurities and the mixture is loaded into a vacuum furnace equipped with heating elements of graphite and heated to 1,200.degree. to 1,500.degree. C. in an atmosphere with reduced pressure of between 0.1 and 5 torr.
摘要翻译： 提出了一种制造高纯度金属铬的新方法，可以消除炉子加热能力降低，产生的金属铬污染等问题，以及与炉子运行有关的其他缺点。 根据本发明，将一种或多于一种选自Sn，Ni和Cu的易硫化金属加入到含金属铬的杂质中，并将该混合物装入装有石墨加热元件的真空炉中并加热至1200℃至 在0.1至5托之间的减压气氛中为1500℃。
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公开(公告)号：US5259866A
公开(公告)日：1993-11-09
申请号：US719625
申请日：1991-06-24
IPC分类号： C22B34/32
CPC分类号： C22B34/32
摘要： Chromium carbide powder and/or powder of an easily sulfidable metal are added to powdered crude metallic chromium to form a mixture thereof, which is then heated in vacuum to remove S, N and O by degassing so that consequently the crude metallic chromium is free from impurities to a possible maximum extent.Alternatively, powdered crude metallic chromium is heated in an atmosphere of inert gas to temperature between 800 and 1,400.degree. C. and then an easily sulfidable metal is added thereto to form a mixture thereof. Subsequently, the mixture is, directly or after adding carbon or chromium carbide, heated again in vacuum or in an atmosphere of inert gas to eliminate S, N and O by degassing so that the crude metallic chromium is free from impurities to a possible maximum extent.Still alternatively, powdered crude metallic chromium is washed with inorganic acid such as hydrochloric acid, sulfuric acid or nitric acid or organic acid such as acetic acid to remove metal impurities such as Fe. The washed crude metallic chromium is then mixed with carbon or chromium carbide and the mixture is heated in vacuum or in an atmosphere of inert gas to eliminate S, N and O by degassing and consequently produce high-purity metallic chromium.
摘要翻译： 将碳化铬粉末和/或容易硫化的金属的粉末加入到粉末状的粗金属铬中以形成其混合物，然后在真空中加热以通过脱气除去S，N和O，因此粗制的金属铬不含 杂质可能达到最大程度。 或者，将粉末状粗金属铬在惰性气体气氛中加热至800至1400℃之间，然后向其中加入易于硫化的金属以形成其混合物。 随后，混合物直接或在加入碳化铬或碳化铬之后再次在真空中或在惰性气体气氛中加热，以通过脱气除去S，N和O，以使粗金属铬不含杂质至可能的最大程度 。 或者，粉末状粗金属铬用无机酸如盐酸，硫酸或硝酸或有机酸如乙酸洗涤以除去金属杂质如Fe。 然后将洗涤的粗金属铬与碳或碳化铬混合，并将混合物在真空或惰性气体气氛中加热，以通过脱气消除S，N和O，从而产生高纯度金属铬。
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公开(公告)号：US5152830A
公开(公告)日：1992-10-06
申请号：US783250
申请日：1991-10-28
CPC分类号： C21B15/02 , C22B34/32 , C22B5/04 , Y10S75/959
摘要： A thermite process for producing a pure metal or alloy by charging a reactor furnace with a mixture primarily containing a powdered metallic oxide and a reducing agent such as powdered aluminum, wherein a batch of the mixture of the starting materials is divided into a plurality of loading lots. The amount of heat generated by each of the loading lots of the starting materials is so regulated that the amount of heat generated by each loading lot differs from the amount of heat generated by other loading lots and the loading lots are sequentially arranged. The lots are loaded into a furnace to form layers for thermite reaction in an ascending order of heat generation.
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公开(公告)号：US5092921A
公开(公告)日：1992-03-03
申请号：US603222
申请日：1990-10-25
CPC分类号： C22B34/32 , C22B5/04 , Y10S75/959
摘要： High-purity metallic chromium is produced by a method of initially preparing a mixture of chromium oxide, aluminum, carbon and an easily sulfidable metallic powder, and subsequently providing a thermite-reaction with the mixture to produce thermite-crude metallic chromium and a solid solution of carbon and easily sulfidable metal. Residual impurities in the thermite-crude metallic chromium are subsequently removed by heat treating the crude metallic chromium. This method produces high-purity metallic chromium advantageous for preparing corrosion and heat resistant chromium-containing alloys.
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公开(公告)号：US5391215A
公开(公告)日：1995-02-21
申请号：US923456
申请日：1992-08-03
摘要： There is proposed a novel method for manufacturing high-purity metallic chromium that can eliminate the problems of reduced heating capability of the furnace, contamination of produced metallic chromium and other disadvantages related to the operation of the furnace. According to the invention, one or more than one of easily sulfidable metals selected from Sn, Ni and Cu are added to crude metallic chromium containing impurities and the mixture is loaded into a vacuum furnace equipped with heating elements of graphite and heated to 1,200.degree. to 1,500.degree. C. in an atmosphere with reduced pressure of between 0.1 and 5 torr.
摘要翻译： 提出了一种制造高纯度金属铬的新方法，可以消除炉子加热能力降低，产生的金属铬污染等问题，以及与炉子运行有关的其他缺点。 根据本发明，将一种或多于一种选自Sn，Ni和Cu的易硫化金属加入到含金属铬的杂质中，并将该混合物装入装有石墨加热元件的真空炉中并加热至1200℃至 在0.1至5托之间的减压气氛中为1500℃。
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