摘要:
A non-linear voltage limiting device displaying a particular stability characteristic and designed to eliminate flashover failure across its circumferential edge is disclosed herein along with a specific method of fabrication. The voltage limiting device is characterized by a rising resistive current with time at predetermined temperature and voltage levels and includes a disc-shaped wafer composed primarily of zinc oxide. In accordance with the method disclosed herein, after this wafer is formed and sintered in accordance with prescribed temperature and time requirements, its circumferential edge is provided with an anti-flashover coating which requires curing. Thereafter, the coated wafer is annealed in a way which cures the coating and, at the same time, reduces and preferably minimizes the resistive current rise characteristic referred to above.
摘要:
A method for the nondestructive testing of voltage limiting blocks includes the steps of providing several discrete electrical contacts across the block, sequentially applying to each of the contacts a voltage to determine the corresponding current and utilizing the current and voltage values to determine constants related to the microstructure of that particular location. The constants can then be utilized to derive a contour map which will be indicative of a hot spot in such block as determined by a maxima of the contour map.
摘要:
A voltage limiting composition, actually a nonlinear resistor, especially suitable for use in a gapless surge arrester is disclosed herein. This composition includes a predetermined amount of zinc oxide as its primary ingredient and one or more specifically selected additives. All of these constituents are combined and sintered so that the composition displays a nonlinear exponent .alpha. at least equal to about 35 over the current range of 1 ma to 5000 amps and such that its energy absorption capability is at least equal to about 50 joules/cm.sup.3.
摘要:
A sintered nonlinear resistor body, useful in gapless lightning arresters comprises a major amount of ZnO and additional metal oxides including at least Al.sub.2 O.sub.3 and an amount of boron oxide of from about 0.005 mole % to about 0.6 mole %, in combination with a total amount of at least one selected alkali metal oxide of from about 0.005 mole % to about 0.3 mole %.
摘要翻译:一种用于无间隙避雷器的烧结非线性电阻体包括主要量的ZnO和至少包括Al 2 O 3的另外的金属氧化物和约0.005摩尔%至约0.6摩尔%的氧化硼的量, 至少一种选自碱金属氧化物的约0.005摩尔%至约0.3摩尔%。
摘要:
A sintered nonlinear resistor body, useful in gapless lightning arresters comprises a major amount of ZnO and additional metal oxides including at least Al.sub.2 O.sub.3 and an amount of selected alkali metal oxide of from about 0.003 mole % to about 0.2 mole %.
摘要翻译:一种用于无间隙避雷器的烧结非线性电阻体包括主要量的ZnO和至少包含Al 2 O 3的额外的金属氧化物和约0.003摩尔%至约0.2摩尔%的所选择的碱金属氧化物的量。
摘要:
A sintered nonlinear resistor body, useful in gapless lightning arresters comprises a major amount of ZnO and additional metal oxides including at least Al.sub.2 O.sub.3 and an amount of boron oxide of from about 0.005 mole % to about 0.25 mole %.
摘要翻译:一种用于无缝隙避雷器的烧结非线性电阻体包括主要量的ZnO和至少包括Al 2 O 3的氧化物和氧化硼量为约0.005摩尔%至约0.25摩尔%的另外的金属氧化物。
摘要:
A self-supporting, gas-permeable air electrode tube (16) is made having a sintered structure of calcium-doped LaMnO.sub.3, a density of from 60% to 85% of theoretical density, and a Coefficient of Thermal Expansion of from 10.2.times.10.sup.-6 /.degree.C. to 10.8.times.10.sup.-6 /.degree.C., where one end is open and the other end is sealed with a plug (30).
摘要:
A neutron-absorber body for use in burnable poison rods in a nuclear reactor. The body is composed of a matrix of Al.sub.2 O.sub.3 containing B.sub.4 C, the neutron absorber. Areas of high density polycrystalline Al.sub.2 O.sub.3 particles are predominantly encircled by pores in some of which there are B.sub.4 C particles. This body is produced by initially spray drying a slurry of Al.sub.2 O.sub.3 powder to which a binder has been added. The powder of agglomerated spheres of the Al.sub.2 O.sub.3 with the binder are dry mixed with B.sub.4 C powder. The mixed powder is formed into a green body by isostatic pressure and the green body is sintered. The sintered body is processed to form the neutron-absorber body. In this case the B.sub.4 C particles are separate from the spheres resulting from the spray drying instead of being embedded in the sphere.
摘要翻译:用于核反应堆中的可燃毒物棒的中子吸收体。 身体由含有B4C,中子吸收剂的Al2O3基体组成。 高密度多晶Al2O3颗粒的区域主要被孔隙包围,其中一些有B4C颗粒。 该主体通过首先喷雾干燥已经加入粘合剂的Al 2 O 3粉末的浆料来生产。 将具有粘合剂的Al 2 O 3的团聚球的粉末与B4C粉末干混。 混合粉末通过等静压力形成生坯,并将生坯烧结。 将烧结体加工成中子吸收体。 在这种情况下,B4C颗粒与喷雾干燥而不是嵌入球体中的球体分开。
摘要:
A network storage monitor system includes a device driver running on each of at least one first computer and a monitor application running on a second computer in communication with the each first computer. Each first computer also is in communication with a network storage switch and the network storage switch is in communication with at least one storage device. Each device driver sends to the second computer data regarding a storage event when the storage event is initiated by the respective first computer.