Abstract:
In the present invention there is presented a manufacturing method for producing target material pieces (17) which are used in a laser ablation process and which make possible a more efficient coating process by blending an additive suspension (12, 13) prepared in a special way with a powder (11) used as the raw material for the target material. The suspension (14) consisting of the additive (12), raw materials (11) and liquid (13) is heated and after this sintered so that a solid target material piece (17) is produced. The piece (17) produced in this way can advantageously be used as a target in the laser ablation process.
Abstract:
The present invention relates to castable refractory compositions based on magnesia aggregates. The compositions according to the invention consist of a plurality of dry components and a plurality of wet components, said castable refractory composition comprising, based on the total weight of the castable refractory composition, between 50 wt. % and 99 wt. % of a magnesia aggregate material; between 0.1 wt. % and 10 wt. % carbonaceous material; between 0.1 wt. % and 5 wt. % antioxidant; and a non¬ aqueous binder. The compositions according to the invention comprise no more than 2 wt.-% water; the fixed carbon in the composition is no more than about 10 wt.-%, and the antioxidant is selected from one or more carbide materials, nitride materials, boride materials, metals or metal alloys, or from combinations thereof. Also part of the present invention is the use of the compositions in casting, vibration casting, spray-casting, gunning, self-flowing, ramming, shotcrete or patching processes, and their method of formation.
Abstract:
The invention relates to a batch made of refractory mineral materials for lining of assemblies used for nonferrous metal melts, containing over 90% by weight of a mixture of the following constituents or very preferably consisting of the following constituents:- from 3 to 74 % by weight of at least one coarse-grain raw olivine material with at least 70% by weight forsterite content and having grain sizes of 50% by weight over 0.1 mm - from 25 to 49% by weight of at least one ground magnesia with grain sizes of 50% by weight ≤ 1 mm - from 0.9 to 14% by weight of at least one ground silicon carbide (SiC) with grain sizes of 50% by weight ≤ 1 mm - from 0.1 to 10% by weight of at least one fine-particle dry pulverulent silica with particle sizes ≤ 500 μm - from 0 to 4% by weight of at least one antioxidant known per se for refractory products - from 0 bis 4% by weight of at least one additional granulated refractory raw material knowon per se, more particularly having grain sizes of 0% by weight, in particular of 80% by weight, preferably of 100% by weight over 0.1 mm - from 0 to 2% by weight of at least one additive known per se for the production of refractory products from batches - from 0 to 4% by weight of at least one additional substance known per se made of ground refractory materials and/or in the form of what is known as medium-grain-size material and/or of what is known as coarse-grain-size material - from 0 to 10% by weight of at least one binder known per se for refractory materials, e.g. in dry form or in ancillary packaging in liquid form.The invention further relates to the use of the batch for producing refractory products.
Abstract:
Die Erfindung betrifft gepresste, kohlenstoffhaltige bzw. kohlenstoffgebundene Feuerfesterzeugnisse auf Aluminiumoxidbasis und ein Verfahren zu ihrer Herstellung. Die erfindungsgemäßen Feuerfesterzeugnisse finden z. B. Anwendung als Monoblocstopfen, Eintauchausgüsse sowie Pfannenverteilerrohre, die beim Vergießen von Metallen verwendet werden, insbesondere beim Vergießen vom Stahl. Die Feuerfesterzeugnisse bestehen aus Pressmassen aus einem Gemisch von 50 bis 70 Gew.-%, bevorzugt 50 bis 60 Gew.-% Aluminiumoxid, 20 - 30 Gew.-% Kohlenstoffträgern mit einem hohem Kohlenstoffgehalt, 4 - 12 Gew.% kohlenstoffhaltigen Bindemitteln, 2 - 7 Gew.% feingepulverten Metallen oder Legierungen auf Siliziumbasis, 1 - 4 Gew.% feingemahlenen Flussmitteln, 2 bis 7 Gew.-% feinem Siliziumdioxid und weiteren Oxiden und/oder Nicht-Oxiden außer primär-Siliziumkarbid, wobei die Oberfläche der aus dieser Pressmasse hergestellten Feuerfesterzeugnisse in Form einer Selbstglasur ausgestaltet ist.
Abstract:
Provided is an improvement to the erosion and thermal shock resistance of zirconia/carbon-containing refractory material in the high zirconia range where the zirconia content exceeds some 80 mass%. A zirconia/carbon-containing refractory material containing at least 80 mass% zirconia and carbon base material, in which carbon bonds are formed between the aggregate particles, wherein the sum of the open pore volume within the refractory material structure and the volume of the carbon base material is not more than 42 vol% but at least 25 vol%, the pores of 10 µm or more among all of the open pores in the refractory material structure account for not more than 30%, and the carbon base material particles of maximum length exceeding 45 µm in the carbon base material in said zirconia/carbon-containing refractory material account for less than 60 mass% of all of the carbon base material, excluding the bonding carbon, in said zirconia/carbon-containing refractory material.