摘要:
A process for the production of a coal-water mixture, which comprises dry-pulverizing coal under supply of hot air to form pulverized coal in which the proportion of particles having a particle size smaller than 200 .mu.m is at least 90%, in which the proportion of particles having a particle size smaller than 10 .mu.m is 10 to 60%, and making the pulverized coal and the hot air sucked in a mixed-air water jet stream.
摘要:
A nitride semiconductor substrate suitable for a normally-off type high breakdown-voltage device and a method of manufacturing the substrate are provided allowing both a higher threshold voltage and improvement in current collapse.In a nitride semiconductor substrate 10 having a substrate 1, a buffer layer 2 formed on one principal plane of the substrate 1, an intermediate layer 3 formed on the buffer layer 2, an electron transport layer 4 formed on the intermediate layer 3, and an electron supply layer 5 formed on the electron transport layer 4, the intermediate layer 3 has a thickness of 200 nm to 1500 nm and a carbon concentration of 5×1016 atoms/cm3 to 1×1018 atoms/cm3 and is of AlxGa1-xN (0.05≦x≦0.24), and the electron transport layer 4 has a thickness of 5 nm to 200 nm and is of AlyGa1-yN (0≦y≦0.04).
摘要翻译:提供了适用于常关型高击穿电压装置的氮化物半导体衬底和制造衬底的方法,其允许更高的阈值电压和电流崩溃的改善。 在具有衬底1的氮化物半导体衬底10中,形成在衬底1的一个主平面上的缓冲层2,形成在缓冲层2上的中间层3,形成在中间层3上的电子传输层4和 形成在电子输送层4上的电子供给层5,中间层3的厚度为200nm〜1500nm,碳浓度为5×1016原子/ cm3〜1×1018原子/ cm3,为AlxGa1-xN( 0.05≦̸ x< L; 0.24),电子传输层4的厚度为5nm〜200nm,为Al y Ga 1-y N(0&nl E; y≦̸ 0.04)。
摘要:
The problem of the present invention is provision of a tantalum carbide-coated carbon material having superior corrosion resistance to reducing gas and superior resistance to thermal shock at a high temperature and a production method thereof.According to the present invention, a tantalum carbide-coated carbon material having a carbon substrate and a coating film formed directly or via an intermediate layer on the aforementioned carbon substrate can be provided. The coating film consists of a number of microcrystals of tantalum carbide, which are densely gathered and, in an X-ray diffraction pattern of the coating film, the diffraction intensity of the (220) plane of tantalum carbide preferably shows the maximum level, more preferably, the aforementioned diffraction intensity is not less than 4 times the intensity of the second highest diffraction intensity.
摘要:
A back electrode 6 is formed in the back of a Si single crystal substrate 2 of a compound semiconductor in which an n-type 3C-SiC single crystal buffer layer 3 having a thickness of 0.05-2 μm, a carrier concentration of 1016-1021/cm3, a hexagonal InwGaxAl1-w-xN single crystal buffer layer 4 (0≦w
摘要翻译:背面电极6形成在化合物半导体的Si单晶衬底2的背面,其中厚度为0.05-2μm的n型3C-SiC单晶缓冲层3,载流子浓度为10 16×10 21 / cm 3,六方晶系Al x 厚度为0.01-0.5μm的1-wx N单晶缓冲层4(0 <= w <1,0 <= x <1,w + x <1)和n型六方晶系 在Al 3 O 3中,单晶层5(0 <= y <1,0 3 <! - SIPO - >面,并且在六方晶系的表面上形成表面电极7, 单晶层5,以提供化合物s 导致少量能量损失并且允许高效率和高击穿电压的半导体器件。
摘要:
A substrate 1 for growing an electro-optical single crystal thin film in which two or more layers of buffer layers 3, 4, and 5 for buffering lattice mismatch between Si and BTO are formed on an Si (001) substrate 2 is provided as a substrate for growing an electro-optical single crystal thin film which can obtain an electro-optical single crystal thin film of BTO single crystal thin film 6 etc. with a large size and a very high quality.
摘要:
An object of the present invention is to provide a method for accurately measuring a three-dimensional shape of a measuring subject independent of the surface shape of the measuring subject, and another object thereof is to shorten the time from the measurements of the measuring subject until three-dimensional shape data is obtained so as to carry out efficient measuring operations. In a three-dimensional measuring system 1 that measures a three-dimensional shape of a measuring subject, two three-dimensional measuring devices 10, 20 are placed. The three-dimensional measuring device 10 measures a measuring subject placed in a measuring space 3 by allowing a laser slit light L1 in a longitudinal direction to scan in a lateral direction. Moreover, the three-dimensional measuring device 20 measures the measuring subject placed in a measuring space 3 by allowing the laser slit light L1 in a lateral direction to scan in a longitudinal direction.
摘要:
Provided is a method for carburizing a tantalum container which can easily control the carburization thicknesses of various portions of the tantalum container and carburize the tantalum container with a uniform thickness. A method for carburizing a tantalum container 1 made of tantalum or a tantalum alloy to allow carbon to penetrate the tantalum container 1 includes the steps of: supporting the tantalum container 1 on a support member 5, 6 provided in a chamber 3 and setting the tantalum container 1 in the chamber 3; and reducing the pressure inside the chamber 3 and heating the interior of the chamber 3, wherein a carbon source is placed in the vicinity of a portion of the tantalum container 1 hard to carburize.
摘要:
Provided is a method for carburizing a tantalum member whereby the tantalum member is less deformed by carburization and can be carburized with good flatness of the planar part thereof and in a uniform manner. The method is a method for subjecting a tantalum member 1 made of tantalum or a tantalum alloy and having a planar part 1a to a carburization process for allowing carbon to penetrate the member 1 from the surface toward the inner portion thereof and includes the steps of: setting the tantalum member 1 in a chamber 3 containing a carbon source by supporting the planar part 1a on a plurality of support rods 6 tapered at distal ends 6a thereof; and subjecting the tantalum member 1 to a carburization process by reducing in pressure and heating the interior of the chamber 3 to allow carbon derived from the carbon source to penetrate the tantalum member 1 from the surface thereof.
摘要:
A method and system are provided which can easily determine relative positions and postures of a three-dimensional measurement device and an object when the measurement device is used to measure the object using a manipulator. The method includes fixing one of the measurement device and the object, supporting the other at a support point with the manipulator so that a position and support posture of the other can be changed, conducting first measurement with the support point being set to first position and posture, changing the support point to second position and posture so that the second position is a position where the posture is changed, about a reference position within a measurable area of the measurement device in the first measurement, to an opposite side by a degree equal to a portion corresponding to a change from the first posture to the second posture, and conducting second measurement.
摘要:
In a method for aligning three-dimensional shape data obtained by performing a three-dimensional measurement of an object, photogrammetry of the object with a target mark is performed to obtain a three-dimensional position and a normal vector of the target mark by a calculation, and the three-dimensional measurement of the object is performed to obtain a three-dimensional position and a normal vector of the target mark. Then, determined is a correspondence between the three-dimensional position of the target mark obtained by the photogrammetry and the three-dimensional position of the target mark obtained by the three-dimensional measurement, by using the three-dimensional position and the normal vector of the target mark obtained by the photogrammetry and those of the target mark obtained by the three-dimensional measurement, and three-dimensional shape data obtained by the three-dimensional measurement is aligned based on the correspondence between the three-dimensional-positions of the target marks.