摘要:
A heavy duty pneumatic tire comprises a tread portion having a pitch pattern and provided with at least two circumferential main grooves extending circumferentially of the tire, wherein at least one dimple is arranged in a region of an island part ranging from a side end of the tread to a position corresponding to not more than 20% of a tread width per one pitch, and a pair of sipes are disposed at opposed positions of each dimple to a widthwise direction of the tire so as to extend in the widthwise direction of the tire. This dimple has a particular ratio of opening size in widthwise direction to opening size in circumferential direction, a size of not more than 8 mm, a particular depth, and a particular total opening area ratio per one pitch.
摘要:
In an ion bombardment treatment apparatus (1A) and a cleaning method, base materials (W) to be treated are held by a work table (11) so as to be placed between a filament (3) and an anode (4) in a vacuum chamber (2), and a discharge power supply (5) which can generate a glow discharge upon the application of a potential difference between the filament (3) and the anode (4) is insulated from the vacuum chamber (2). In the ion bombardment treatment apparatus (1A) and the cleaning method, the efficiency of the cleaning of a base material can be improved and a power supply can be controlled stably.
摘要:
An arc evaporation source having fast film-forming speed includes: at least one circumference magnet surrounding the circumference of a target, wherein the magnetization direction of the magnet runs orthogonal to the target surface; a non-ring shaped first permanent magnet on the target's rear surface side has a polarity in the same direction as the circumference magnet, and is arranged so that its magnetization direction runs orthogonal to the target's surface; a non-ring shaped second permanent magnet arranged either on the rear surface side of the first permanent magnet or between the first permanent magnet and the target, so as to leave a gap from the first permanent magnet, has a polarity in the same direction as the circumference magnet, and is arranged so that its magnetization direction runs orthogonal to the surface of the target; and a magnetic body between the first permanent magnet and the second permanent magnet.
摘要:
In an ion bombardment treatment apparatus (1A) and a cleaning method, base materials (W) to be treated are held by a work table (11) so as to be placed between a filament (3) and an anode (4) in a vacuum chamber (2), and a discharge power supply (5) which can generate a glow discharge upon the application of a potential difference between the filament (3) and the anode (4) is insulated from the vacuum chamber (2). In the ion bombardment treatment apparatus (1A) and the cleaning method, the efficiency of the cleaning of a base material can be improved and a power supply can be controlled stably.
摘要:
For providing glasses and glass-ceramics having properties suitable for use as a substrate of an information storage medium of next generation such as one for the perpendicular magnetic recording system without employing arsenic and antimony components which adversely affect human beings and the environment, there are provided glass-ceramics comprising SiO2, Li2O and Al2O3 on oxide basis, comprising lithium disilicate as a crystal phase, and comprising one or more elements selected from the group consisting of Sn, Ce, Mn, W, Ta, Bi, Nb, S, Cl and F.
摘要翻译:为了提供具有适合用作下一代信息存储介质的基板的玻璃和玻璃陶瓷,例如用于垂直磁记录系统的基板,而不使用对人类和环境有不利影响的砷和锑成分, 包含基于氧化物的SiO 2,Li 2 O和Al 2 O 3的玻璃陶瓷,包含二硅酸锂作为结晶相,并且包含选自Sn,Ce,Mn,W,Ta,Bi,Nb,S,Cl中的一种或多种元素 和F.
摘要:
There is provided a glass substrate which has the properties required in the use as a substrate for an information recording medium of the next generation such as a perpendicular magnetic recording system, and can be applied as a substrate for an information recording medium of the next generation particularly on the premise of using the glass substrate in a dynamic environment. More particularly, there is provided a glass substrate for an information recording medium which has sufficiently high surface hardness, has a good balance between specific gravity and mechanical strength, and has high strength to withstand high speed rotation or drop impact, and which can be produced with a high productivity adequate for a direct press method, without the occurrence of bubbles in the glass blank or reboil upon pressing even if arsenic components or antimony components are not substantially used. A glass substrate for an information recording medium, includes, as expressed in terms of percent by mass on the oxide basis: 52 to 67% of SiO2, 3 to 15% of Al2O3, and 0.2 to 8% of P2O5, the glass substrate having a Young's modulus of 85 GPa or greater, a specific gravity of 2.60 or less, and a ratio of Young's modulus to specific gravity (Young's modulus/specific gravity) of 33.0 or greater.
摘要翻译:提供了具有在用作诸如垂直磁记录系统的下一代信息记录介质的基板所需的性能的玻璃基板,并且可以用作下一代信息记录介质的基板 特别是在动态环境中使用玻璃基板的前提下。 更具体地,提供了一种用于信息记录介质的玻璃基板,其具有足够高的表面硬度,比重和机械强度之间具有良好的平衡,并且具有高的耐受高速旋转或落下冲击的强度,并且可以制造 具有足够的直接压制方法的高生产率,即使在基本不使用砷成分或锑成分的情况下,也不会在玻璃坯料中发生气泡或者在压制时再沸腾。 用于信息记录介质的玻璃基板包括以氧化物为基准的质量百分比表示:SiO 2为52〜67%,Al 2 O 3为3〜15%,P 2 O 5为0.2〜8%,玻璃基板 杨氏模量为85GPa以上,比重为2.60以下,杨氏模量与比重(杨氏模量/比重)的比为33.0以上。
摘要:
There is provided a precure tread and a retreaded tire using same capable of enhancing the stiffness of the land portion and significantly reducing likelihood of peeling off from the base tire during traveling by optimizing the cross-section shape of the rear surface groove of the precure tread, while maintaining the wet performance from the beginning to the end of wear life.A precure tread 1 has a circumferential groove 2 extending in a circumferential direction of a tire on a front surface which is to be a ground contact surface of the tire and a rear surface groove 4 extending in the circumferential direction of the tire on a rear surface which is to be attached to a base tire 3, the rear surface groove appearing from a tread surface as wear of the tread surface is progressed. Such rear surface groove 4 has a generally trapezoidal shape, as viewed in a cross-section in the width direction of the tire, and a width of the rear surface groove is constant or tapered from a bottom 5 to an opening 6 of the groove. Such precure tread is used to form a retreaded tire.
摘要:
There are provided low expansion transparent glass-ceramics obtained by heat treating a base glass produced at a relatively low melting temperature of 1530° C. or below. The glass-ceramics have an average linear thermal expansion coefficient within a range from +6×10−7/° C. to +35×10−7/° C., 80% transmittance wavelength (T80) of 700 nm or below, internal transmittance of 75% or over at light wavelength of 1550 nm, heat resisting temperature of 800° C. or over and Young's modulus of 90 GPa or over. The glass-ceramics comprise SiO2, Al2O3, MgO, CaO, BaO, ZnO, Li2O, TiO2 and ZrO2 and contain β-quartz or β-quartz solid solution as a predominant crystal phase. There are also provided optical waveguide elements and an arrayed waveguide grating (AWG) type planar lightwave circuit utilizing these glass-ceramics.
摘要:
Glass for a light filter capable of preventing variation of refractive index in a band-pass filter has a coefficient of thermal expansion within a range from 90×10−7/° C. within a temperature range from −20° C. to +70° C. and, preferably, Young's modulus of 75 GPa or over and Vickers hardness of 550 or over, and light transmittance for plate thickness of 10 mm of 90% or over within a wavelength range from 950 nm to 1600 nm.
摘要:
There is provided a glass-ceramic which is suitable for use as a light filter. The glass-ceramic has Young's modulus (GPa) within a range from 95 to 120 and includes 5.3-8 weight percent of Al2O3, 0.5-3.5 weight percent of ZrO2 and 71-81 weight percent of SiO2, based respectively on the total content of the oxides. The glass-ceramic preferably has, as its predominant crystal phases, (a) lithium disilicate (Li2O.2SiO2) and (b) at least one of &agr;-quartz (&agr;-SiO2) and &agr;-quartz solid solution (&agr;-SiO2 solid solution), has specific gravity within a range from 2.4 to 2.6 and has a coefficient of thermal expansion within a range from 65×10−7/° C. to 130×10−7/° C. within a temperature range from −50° C. to +70° C.