摘要:
Coke deposited within the gas passages of a dual tower type, fluidized bed apparatus for thermally cracking hydrocarbon oils is removed by combustion through contact with a stream of an oxygen-containing, high temperature combustion gas without a need to disjoint the apparatus. The apparatus is comprised of heating and cracking towers each adapted for containing a mass of fluidized solid particles continuously recirculating between the two towers. In one embodiment, all of the solid particles are discharged from the apparatus and a stream of the oxygen-containing combustion gas, produced in a combustion furnace connected to the heating tower, is allowed to pass through the gas passages.
摘要:
In the process of thermally cracking a heavy hydrocarbon oil by feeding said oil into a fluidized bed reactor as a high-velocity atomized gas stream by blowing said oil therein from a gas-mixing type nozzle along with an atomizing gas and carrying out the thermal cracking of the oil at above 500.degree. C., the improvement which comprises blowing in an inert gas to the eddying part formed in the environs of said atomized gas stream in said fluidized bed reactor thereby blocking the formation of eddies to thus prevent the accumulation of coke deposits on the outside wall of said nozzle and the walls of the fluidized bed reactor in the vicinity of said nozzle.
摘要:
A manufacturing method for a superconducting wire which is a fine line made of an oxide superconductor, including the steps of forming the fine line by drawing a metal pipe filled with materials for the oxide superconductor, causing the materials to react to produce the oxide superconductor, heating the metal pipe at a temperature which is higher than the melting point of the metal material constituting the metal pipe.
摘要:
A superconducting wire having a stacked structure comprising (a) a substrate composed of an electrically conductive material, (b) an oxide superconductor material, and (c) an electrically conductive material which is substantially not reactive with said oxide superconductor material (b), wherein said electrically conductive material (c) is impregnated in said oxide superconductor material (b) by way of heat fusion such that gaps among crystal grains contained in said oxide superconductor material (b) are filled with said electrically conductive material (c). And a process for the production of said superconducting wire.
摘要:
A cylinder-type endosseous implant having a collar portion and a main type body portion formed under the collar portion. The implant also has screw threads, wherein the height of said screw threads is 0.2 to 0.4 mm; the pitch of said screw threads is 0.8 to 1.7 mm and the rising angle of said screw threads is determined to be at least 50.degree. and less than 90.degree.. The rising angle is defined to be the angle made by a root surface of the main body portion and the straight line which could be drawn from the top of a screw thread to the bottom of the same screw thread.
摘要:
A bone grafting material for use in medicine is glass wool which has the mean diameter of 100 .mu.m or less and whose composition is:SiO.sub.2 40-62% (w/w)Na.sub.2 O 10-32% (w/w)CaO 10-32% (w/w)P.sub.2 O.sub.5 0-12% (w/w)CaF.sub.2 0-12% (w/w)B.sub.2 O.sub.3 0-20% (w/w),When the grafting material is used for treatment of periodontal disease, the grafting material is completely replaced by newly formed bone, whereby dental ankylosis of the grafting material to a tooth root does not occur and the newly formed bone and the tooth root are bound with a tissue like a periodontal membrane.
摘要:
Disclosed are medium and methods for storage and reading of stored information. The storage medium comprises an oxide layer having a plurality of pits and projections on the oxide layer surface. Information storage is achieved by applying voltage or light, in accordance to information signals, to the oxide layer, to differentially heat said oxide layer and create a plurality of portions which contain different quantities of oxygen. Stored information is read by the application of voltage or light to the oxide layer containing a plurality of portions containing different quantity of oxygen and detection of the electrical resistance or light reflectivity of each of said plurality of portions.
摘要:
A composition for dielectric porcelain comprises BaTiO.sub.3 and 1 to 5 mole % of a compound with a molar ratio of Bi.sub.2 O.sub.3 :RuO.sub.2 =1:2 based on said BaTiO.sub.3.
摘要翻译:电介质瓷的组合物包括BaTiO 3和1至5摩尔%的基于所述BaTiO 3的摩尔比Bi 2 O 3 :RuO 2 = 1:2的化合物。
摘要:
An environment sensor (11) for measuring the temperature and humidity can be miniaturized and can respond at high speed. The environment sensor (11) includes a temperature sensing portion (111) having a temperature-sensitive material (1) made of a metal oxide, and a humidity-sensing portion (112) which is formed on the same substrate as the temperature sensing portion (111) and measures the ambient humidity by using a change in electrical characteristics. At least one of a pair of electrodes (2, 3) of the temperature sensor (111) is integrated with an electrode of the humidity-sensing portion (112).
摘要:
A metal oxide manufacturing method includes the steps of preparing the metal oxide expressed by a general formula of AXBYCZDn, (where A represents at least one element selected from a group consisting of a rare earth element, yttrium and an element obtained either by substituting part of rare earth elements with alkali metals or alkali earth metals or by substituting part of yttrium with alkali metals or alkali earth metals, B represents an alkali earth metal, C represents copper or an element obtained by substituting part of copper with transition metals, and D represents oxygen, and where when X=1, Y=2 to 4, Z=2.7 to 6 and n=6 to 13), reducing the metal oxide expressed by the general formula, and halogenating the reduced metal oxide. Part of oxygen (D) of the metal oxide expressed by the general formula is substituted with the halogen elements.