摘要:
A ZrO2—Al2O3 composite ceramic material having excellent wear resistance, hardness, strength and toughness is provided. This ceramic material comprises a ZrO2 phase composed of 90 vol % or more of tetragonal ZrO2, and containing 10 to 12 mol % of CeO2 as a stabilizer, and an Al2O3 phase. An amount of the Al2O3 phase in the ceramic material is in a range of 20 to 70 vol %, and preferably 40 to 70 vol %. In the composite ceramic material, Al2O3 grains each having a fine ZrO2 grain therein are dispersed. Some of the Al2O3 grains each having the fine ZrO2 grain therein are trapped within ZrO2 grains to form composite grains. A ratio of the number of the Al2O3 grains each having the fine ZrO2 grain therein relative to the number of the entire Al2O3 grains dispersed in the composite ceramic material is 10% or more, and preferably 50% or more.
摘要翻译:提供了具有优异的耐磨性,硬度,强度和韧性的ZrO 2 -Al 2 O 3复合陶瓷材料。 该陶瓷材料包括由90质量%以上的四方晶ZrO 2构成的含有10〜12摩尔%的作为稳定剂的CeO 2和Al 2 O 3相的ZrO 2相。 陶瓷材料中的Al 2 O 3相的量为20〜70体积%,优选为40〜70体积%。 在复合陶瓷材料中,分散有ZrO 2颗粒微小的Al 2 O 3粒子。 一些具有细ZrO 2颗粒的Al 2 O 3颗粒被捕获在ZrO 2晶粒内以形成复合晶粒。 每个具有细ZrO 2颗粒的Al 2 O 3颗粒的数量相对于分散在复合陶瓷材料中的整个Al 2 O 3颗粒的数量的比例为10%以上,优选为50%以上。
摘要:
A ZrO2—Al2O3 composite ceramic material having excellent wear resistance, hardness, strength and toughness is provided. This ceramic material comprises a ZrO2 phase composed of 90 vol % or more of tetragonal ZrO2, and preferably containing 10 to 12 mol % of CeO2 as a stabilizer, and an Al2O3 phase. An amount of the Al2O3 phase in the ceramic material is in a range of 20 to 70 vol %. The ceramic material comprises composite particles dispersed therein, each of which has a triple nanocomposite structure that an Al2O3 grain containing a fine ZrO2 grain therein is trapped within a ZrO2 grain.
摘要翻译:提供具有优异的耐磨性,硬度,强度和韧性的ZrO 2 -Al 2 O 3 O 3复合陶瓷材料。 该陶瓷材料包括由90体积%以上的四方晶ZrO 2 2构成的ZrO 2 2相,优选含有10〜12摩尔%的CeO 2 2 < SUB>作为稳定剂和Al 2 O 3 O 3相。 陶瓷材料中的Al 2 O 3 O 3相的量为20〜70体积%。 陶瓷材料包括分散在其中的复合颗粒,其中每一个都具有三重纳米复合结构,其中含有细小的ZrO 2 N 2 O 3颗粒, 其中的颗粒被捕获在ZrO 2颗粒内。
摘要:
A ZrO2—Al2O3 composite ceramic material having excellent wear resistance, hardness, strength and toughness is provided. This ceramic material comprises a ZrO2 phase composed of 90 vol % or more of tetragonal ZrO2, and containing 10 to 12 mol % of CeO2 as a stabilizer, and an Al2O3 phase. An amount of the Al2O3 phase in the ceramic material is in a range of 20 to 70 vol %, and preferably 40 to 70 vol %. In the composite ceramic material, Al2O3 grains each having a fine ZrO2 grain therein are dispersed. Some of the Al2O3 grains each having the fine ZrO2 grain therein are trapped within ZrO2 grains to form composite grains. A ratio of the number of the Al2O3 grains each having the fine ZrO2 grain therein relative to the number of the entire Al2O3 grains dispersed in the composite ceramic material is 10% or more, and preferably 50% or more.
摘要翻译:提供了具有优异的耐磨性,硬度,强度和韧性的ZrO 2 -Al 2 O 3复合陶瓷材料。 该陶瓷材料包括由90质量%以上的四方晶ZrO 2构成的含有10〜12摩尔%的作为稳定剂的CeO 2和Al 2 O 3相的ZrO 2相。 陶瓷材料中的Al 2 O 3相的量为20〜70体积%,优选为40〜70体积%。 在复合陶瓷材料中,分散有ZrO 2颗粒微小的Al 2 O 3粒子。 一些具有细ZrO 2颗粒的Al 2 O 3颗粒被捕获在ZrO 2晶粒内以形成复合晶粒。 每个具有细ZrO 2颗粒的Al 2 O 3颗粒的数量相对于分散在复合陶瓷材料中的整个Al 2 O 3颗粒的数量的比例为10%以上,优选为50%以上。
摘要:
A ZrO2—Al2O3 composite ceramic material having excellent wear resistance, hardness, strength and toughness is provided. This ceramic material comprises a ZrO2 phase composed of 90 vol % or more of tetragonal ZrO2, and containing 10 to 12 mol % of CeO2 as a stabilizer, and an Al2O3 phase. An amount of the Al2O3 phase in the ceramic material is in a range of 20 to 70 vol %, and preferably 40 to 70 vol %. In the composite ceramic material, Al2O3 grains each having a fine ZrO2 grain therein are dispersed. Some of the Al2O3 grains each having the fine ZrO2 grain therein are trapped within ZrO2 grains to form composite grains. A ratio of the number of the Al2O3 grains each having the fine ZrO2 grain therein relative to the number of the entire Al2O3 grains dispersed in the composite ceramic material is 10% or more, and preferably 50% or more.
摘要翻译:提供了具有优异的耐磨性,硬度,强度和韧性的ZrO 2 -Al 2 O 3复合陶瓷材料。 该陶瓷材料包括由90质量%以上的四方晶ZrO 2构成的含有10〜12摩尔%的作为稳定剂的CeO 2和Al 2 O 3相的ZrO 2相。 陶瓷材料中的Al 2 O 3相的量为20〜70体积%,优选为40〜70体积%。 在复合陶瓷材料中,分散有ZrO 2颗粒微小的Al 2 O 3粒子。 一些具有细ZrO 2颗粒的Al 2 O 3颗粒被捕获在ZrO 2晶粒内以形成复合晶粒。 每个具有细ZrO 2颗粒的Al 2 O 3颗粒的数量相对于分散在复合陶瓷材料中的整个Al 2 O 3颗粒的数量的比例为10%以上,优选为50%以上。
摘要:
The present invention produces a zirconia-alumina composite ceramic material that exhibits an excellent wear resistance and hardness and that resists chipping at the particle edges. The zirconia-alumina composite ceramic material according to the present invention has a composite structure in which zirconia particles are dispersed in alumina particles and the alumina particles are dispersed in the zirconia particles. A first phase is formed of ceria-containing zirconia particles and a second phase is formed of alumina particles. An α-alumina powder having an average particle size of at least 0.1 μm and a γ-alumina powder having an average particle size of 0.01 to 0.1 μm are used in a proportion of 85:15 to 65:35 as the mass ratio for the alumina powder for producing the alumina particles of the second phase.
摘要:
In a mobile terminal device, a hinge member and a conductive member provided on a chassis and functioning as an antenna are electrically contacted with each other through the slide operation of a chassis and thereby can be configured as an antenna usable in various use situations without providing a separate antenna. Consequently, the mobile terminal device is provided, the manufacture cost of which can be suppressed, the size and thickness of which can be reduced, and which can prevent antenna characteristics from degrading because the antenna is not provided at a portion gripped by a hand. In the device, a first chassis (101) has a radio circuit (112). A second chassis (102) has a ground plate (121) and is attached so as to be freely slidable with respect to the first chassis (101). A tilt hinge member (104a) rotatably connects the first chassis (101) to the second chassis (102), is fed from the radio circuit (112), and functions as an antenna together with the ground plate (121) when the hinge member is electrically contacted with the ground plate (121) through the slide operation of the second chassis (102).
摘要:
The invention is to improve antenna performance in an internal antenna in a closed state without deteriorating the antenna performance in a state where a foldable portable radio apparatus is opened. A foldable portable radio apparatus includes a foldable mechanism in which an upper casing 101 and a lower casing 104 are rotatably connected, a first conductor plate 102 and a second conductor plate 103 that are provided in the upper casing 101, and a feeding system that is provided in the lower casing 104, and connects an antenna element 107, a circuit board 105, the first conductor plate 102, and the circuit board, a detecting unit 109 that detects opened and closed states between the upper casing 101 and the lower casing 104, and a first switching unit 110 that switches between an electrically opened state and an electrically short-circuited state between the first conductor plate and the second conductor plate according to the detected result by the detecting unit 109.
摘要:
In a portable radio apparatus, the antenna performance is improved while fitting conductor elements into an inside of a case without an increase in size of the case when two cases are closed. A monopole antenna arranged in an inside of a first case of a portable radio apparatus includes an element 11 on the power feed side, an element 12 on the open end side, and a resonance circuit 13. A width of the element 12 on the open end side, which comes close to an electronic parts 10 arranged in an inside of a second case and containing a metal in a folded mode, is set smaller than a width of the element 11 on the power feed side, which does not come close to the electronic parts 10.
摘要:
Regardless of a user's hand holding condition, it is possible to obtain excellent antenna performance in both of folded and unfolded calling conditions.A folder type mobile radio apparatus includes an upper case 1301 having a first antenna element made of a metal plate 1305, a lower case 1302 having a second antenna element made of a circuit board 102, a hinge portion 1303 pivotably connecting the upper and lower cases 1301 and 1302, a first circuit board 101 having a ground pattern provided in an end side near the hinge portion 1303 in the lower case, an antenna switching unit 103 for selecting one of a first feed means for feeding the first antenna element for the radio circuit 1314 on the first circuit board 101 or a second feed means for feeding the second antenna element.
摘要:
In the foldable mobile radio apparatus constructed by coupling two cases to open and close, the high antenna performance can be secured over the wider band with the simple structure. A foldable mobile radio apparatus, includes a first case, an antenna element provided to the first case, a second case, a hinge portion for joining the first case and the second case turnably, a circuit board provided to an inside of the second case and having a ground pattern, and a feeding portion connected to a radio circuit on the circuit board. The hinge portion is formed of a nonconductive resin, and has a rotation shaft made of conductive metal to join the first case and the second case turnably. The rotation shaft is spatially coupled to the antenna element at a predetermined interval, and the rotation shaft is arranged to separate from the ground pattern on the circuit board, and is connected electrically to the feeding portion. Also, the antenna element, the rotation shaft, and the ground pattern on the circuit board operate as an antenna.