摘要:
Manufacturing sintered bodies having microstructures including microscopic grains having a grain diameter of less than 5 μm, intermediate grains having a grain diameter of 5 μm or more and less than 15 μm, and coarse grains having a grain diameter of 15 μm or more and 100 μm or less enables to obtain high electric characteristics. Chemical compounds including metal elements are mixed so that the ratio of the elements is a composition expressed by (Li, Na, K)(Nb, Ta)O3, the mixture is calcined and crushed to obtain calcined/crushed powder. The powder is sintered in a constant temperature keeping process wherein temperature is kept constantly at a predetermined temperature within a range from 800 to 900° C. for a predetermined period of time in a heating process, and then the powder is further sintered by raising temperature to firing temperature, thereby the piezoelectric materials having superior electric characteristics are manufactured.
摘要:
A dielectric device of higher performance is provided. An electron emitter, to which the dielectric device is applied is provided with: an emitter including a dielectric; and an upper electrode and a lower electrode to which drive voltage is applied in order to emit electrons. The emitter is formed by the aerosol deposition method or the sol impregnation method.
摘要:
A semiconductor device having a plurality of semiconductor chips mounted on a lead frame (10) and required portions covered with seal portions in which: the plurality of semiconductor chips are divided into a first group of semiconductor chips (Dx to Dz) and a second group of semiconductor chips (Du to Dw and Thx to Thz); both groups of semiconductor chips are mounted on the lead frame (10) at a distance from each other; the seal portions are comprised of first and second resin-seal portions (41 and 42) which cover the first and second groups of semiconductor chips, respectively, along with required portions of the lead frame; both resin-seal portions are mechanically coupled with each other by coupling portions; and a group of read terminals respectively connected to circuits within the first resin-seal portion and circuits within the second resin-seal portion are led out through a gap between the first resin-seal portion (41) and the second resin-seal portion (42).
摘要:
A dielectric-film-type electron emitter includes an emitter section, a first electrode, and a second electrode. The emitter section is formed of a thin layer of a polycrystalline dielectric material. The dielectric material constituting the emitter section is formed of a material having high mechanical quality factor (Qm). Specifically, the dielectric material has a Qm higher than that of a so-called low-Qm material (a material having a Qm of 100 or less). The Qm of the dielectric material is preferably 300 or more, more preferably 500 or more.
摘要:
A battery charging apparatus includes a controlled rectifier circuit for rectifying an output of a magneto AC generator and supplying a rectified output to a battery. The controlled rectifier circuit includes thyristors as rectifying elements, and components of the controlled rectifier circuit are mounted on a circuit board. The charging apparatus includes a protection circuit which has a sensor detecting a temperature of the circuit board and inhibits a trigger signal from being supplied to thyristors of said rectifier circuit when a temperature detected by said sensor is equal to or higher than a predetermined value.
摘要:
A (Li, Na, K)(Nb, Ta)O3 based piezoelectric/electrostrictive porcelain composition obtained by adding a slight amount of a Mn compound to a perovskite type oxide containing Li, Na and K as A-site elements and contains at least Nb out of Nb and Ta as B-site elements, where a ratio of a total number of atoms of the A-site elements to a total number of atoms of the B-site elements is not smaller than 1. A composition of the perovskite type oxide as a principal component is represented by a general formula: {Liy(Na1-xKx)1-y}a(Nb1-zTaz)O3. The A/B ratio “a” preferably satisfies 1
摘要翻译:通过向含有Li,Na和K的钙钛矿型氧化物中添加少量的Mn化合物作为A位元素而至少含有(Li,Na,K)(Nb,Ta)O 3的压电/电致伸缩瓷组合物 Nb中的Nb和Ta作为B位元素,其中A位元素的总原子数与B位元素的总原子数的比率不小于1.钙钛矿的组成 氧化物作为主要成分的通式为:{Liy(Na1-xKx)1-y} a(Nb1-zTaz)O3。 A / B比“a”优选满足1
摘要:
A piezoelectric/electrostrictive film device is provided including a thin ceramic substrate and a piezoelectric/electrostrictive operating portion disposed on the substrate. The piezoelectric/electrostrictive operating portion includes a lower electrode film, a piezoelectric/electrostrictive film including a large number of crystal particles having a piezoelectric/electrostrictive composition, and an upper electrode film successively laminated on the substrate. The piezoelectric/electrostrictive composition excludes lead and contains one or more alkali metal elements selected from the group consisting of lithium, potassium, and sodium, and one or more metal elements selected from the group consisting of niobium, tantalum, antimony, and silver. Circle equivalent diameters of at least 90% of the crystal particles in the piezoelectric/electrostrictive film are in a range of 0.3 to 50 μm.
摘要:
There is disclosed a piezoelectric/electrostrictive porcelain composition capable of manufacturing, at a comparatively low sintering temperature, a piezoelectric/electrostrictive body which is dense and superior in crystallinity and which has satisfactory piezoelectric/electrostrictive characteristics so that deviation of the composition is not easily generated. The piezoelectric/electrostrictive porcelain composition contains as a major component a piezoelectric/electrostrictive porcelain composition component including a PbMg1/3Nb2/3O3—PbZrO3—PbTiO3 ternary solid solution system composition and NiO or including a Pb(Mg, Ni)1/3Nb2/3O3—PbZrO3—PbTiO3 ternary solid solution system composition, and further contains lead germanate.
摘要翻译:公开了一种压电/电致伸缩瓷组合物,其能够在比较低的烧结温度下制造致密且结晶性优异并且具有令人满意的压电/电致伸缩特性的压电/电致伸缩体,因此不容易产生组成的偏差 。 压电/电致伸缩瓷组合物含有作为主要成分的压电/电致伸缩瓷组合物组分,其包含PbMg 1/3 Nb 3/3/3 O 3 > - >三元固溶体系组成和NiO,或包含Pb(Mg,Ni)1/3 1/3 Nb > 3/3的三元固体溶液体系组合物,并且还含有锗酸铅。
摘要:
[Problems] To provide a dielectric component which remedies the degradation of amount of electron emission of an electron emitter. [Means to Solve the Problems] Provided is a dielectric composition which, when applied to an electron emitter, enables suppression of reduction of electron emission quantity with passage of time. The dielectric composition contains, as a primary component, a PMN-PZ-PT ternary solid solution composition represented by the following formula PbxBip(Mgy/3Nb2/3)aTib-zMzZrcO3 [wherein x, p, and y satisfy the following relations: 0.85≦x≦1.05, 0.02≦p≦0.1, and 0.8≦y≦1.0; a, b, and c are decimal numbers falling within a region formed by connecting the following five points (0.550, 0.425, 0.025), (0.550, 0.150, 0.300), (0.100, 0.150, 0.750), (0.100, 0.525, 0.375), and (0.375, 0.425, 0.200); z satisfies the following relation: 0.02≦z≦0.10; and M is at least one element selected from among Nb, Ta, Mo, and W], and contains Ni in an amount of 0.05 to 2.0 wt. % as reduced to NiO.
摘要翻译:[问题]提供补偿电子发射体的电子发射量的劣化的电介质成分。 解决问题的手段提供一种电介质组合物,当应用于电子发射体时,可以抑制电子发射量随时间的减少。 电介质组合物含有作为主要成分的由下式表示的PMN-PZ-PT三元固溶体组合物Pb(Mg y / y) 3 Nb 2/3 3)a z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / 其中x,p和y满足以下关系:0.85 <= x <= 1.05,0.02 <= p <= 0.1,0.8 <= y <= 1.0; a,b,c是分别连接以下五个点(0.550,0.425,0.025),(0.550,0.150,0.300),(0.100,0.150,0.7050),(0.100,0.525,0.375),(0.100,0.525,0.375), )和(0.375,0.425,0.200); z满足以下关系:0.02 <= z <= 0.10; 并且M是选自Nb,Ta,Mo和W中的至少一种元素,并且含有0.05-2.0重量%的Ni。 %减少到NiO。
摘要:
A piezoelectric/electrostrictive material is made of a BaTiO3-based porcelain composed mainly of BaTiO3 and containing CuO and Nb2O5. 85% or more of the crystal grains constituting the porcelain are grains having particle diameters of 10 &mgr;m or less and the maximum particle diameters of the grains are in a range of 5 to 25 &mgr;m. This BaTiO3-based piezoelectric/electrostrictive material is superior in piezoelectric/electrostrictive properties to conventional products and can be suitably used in an actuator or a sensor.