139 results about "Ferrite substrate" patented technology

The present invention relates to a molded ferrite sheet having opposing surfaces and a thickness in a range of 30 μm to 430 μm, at least one surface of said opposing surfaces having the following surface roughness characteristics (a) to (c):

• • (a) a center line average roughness is in a range of 170 nm to 800 nm,
  • (b) a maximum height is in a range of 3 μm to 10 μm, and
  • (c) an area occupancy rate of cross-sectional area taken along a horizontal plane at a depth of 50% of the maximum height in a square of side 100 μm is in a range of 10 to 80%.

A thin film magnetic induction element includes a ferrite substrate, a coil provided across the ferrite substrate and including connection conductors and coil conductors, and terminals provided on perimeter portions of the substrate. Terminals capable of being adversely affected by an induced magnetic flux, such as a VDD terminal, a CGND terminal, an IN terminal, a PVDD terminal, a PGND terminal, an FB terminal, a CE terminal, and an AL terminal are arranged along the Y-direction of the substrate, in which the magnetic flux density is low. Terminals substantially incapable of being adversely affected by an induced magnetic flux are arranged along the X-direction of the substrate, in which the magnetic flux density is high. A micro electric power converter having the thin film magnetic induction element is less susceptible to circuit malfunctions.

The present invention provides a composite substrate type microstrip circulator. The composite substrate type microstrip circulator comprises a ferrite-dielectric substrate composed of a ferrite substrate and a dielectric substrate; a through hole is formed in the dielectric substrate; the ferrite substrate is fixed in the through hole in the dielectric substrate; the upper and lower surface of the ferrite-dielectric substrate are plated with metal layers; the upper surface of the ferrite-dielectric substrate is provided with a microstrip circuit; the lower surface of the ferrite-dielectric substrate is provided with a continuous metal layer; an annular junction region microstrip circuit in the microstrip circuit is disposed on the ferrite substrate; a matching microstrip circuit in the microstrip circuit is disposed on the dielectric substrate; a ceramic spacer and a permanent capacitor are disposed above the microstrip circuit; and the ferrite-dielectric substrate is fixed on a metalbase. Compared with a traditional full-ferrite substrate type microstrip circulator, the composite substrate type microstrip circulator has the advantages of small size and low consumption, and is applicable to surface mounted and highly integrated microwave circuits.

The invention provides 780MPa-level low-carbon and low-alloy TRIP steel and a rapid heat treatment method thereof. The steel comprises the following chemical components in percentage by mass: 0.16-0.22% of C, 1.2-1.6% of Si, 1.6-2.2% of Mn, and the balance Fe and other inevitable impurities. The method comprises the steps of rapidly heating, maintaining temperature within short time, and rapidly cooling. According to the steel and the method, the recrystallizing and phase changing processes in the heating and the phase change process in cooling are controlled, thus a three-phase structure thatbainite and austenite are uniformly distributed on a ferrite substrate can be obtained; the average crystal grain size of bainite and austenite is 1-3 microns; bainite is of a submicron particle form; austenite is of an island uniformly-distributed equiaxial crystal grain form; the whole three-phase structure comprises 35-75% by volume of bainite, 10-60% by volume of ferrite, and 5-15% by volumeof austenite; with the adoption of the rapid heat treatment, the mechanical performance of the material is improved while the heat treatment efficiency is improved; and the material performance area range is expanded.

The invention discloses an oxidation-resistant alloying grey cast iron and a preparation method of the oxidation-resistant alloying grey cast iron. The cast iron comprises the following components by mass percentage: 3.0-3.2% of C, 1.8-2.0% of Si, 0.50-0.70% of Mn, 0.10-0.50% of Cr, 0.20-0.30% of Ni, 0.03-0.50% of Mo, 0.5-3.0% of Al, 0.05-0.08% of Sr, 0.005-0.15% of Zn, and the balance of Fe and inevitable impurities. The preparation method comprises the steps of melting raw materials, culturing and processing, and pouring, wherein the tapping is carried out at 1450 to 1550 DEG C after melting; the molten iron is processed by being flushed in a ladle and cultured and processed along with the flow, and then slagged and casted. According to the oxidation-resistant alloying grey cast iron provided by the invention, the organization of the grey alloying cast iron material is structured by distributing 6-8 grades of D type graphite with little graphite of A type on a ferrite substrate, so that higher toughness, high heat conductivity and high-temperature oxidization resistance can be achieved, and good casting technical performance can be ensured as well; and the oxidation-resistant alloying grey cast iron can be applied to manufacturing a glass die and a light alloy metal type casting die which can bear the heat impacting of high-temperature formed liquid and cold-heat alternating stress for a long time.

The invention relates to an overweight heavy truck, in particular to cast iron for a cast-iron brake drum of the overweight heavy truck running on mountain roads or slopes and requiring frequent braking. Based on the chemical components of HT250, ferrite spheroidal graphite cast iron and ferrite vermicular iron, the chemical components of the cast iron are redesigned and comprise C, Si, Mn, P, S, Cr, Cu, Mg, RE and Fe; and the cast iron of which the spheroidal and vermicular graphite is distributed on a pearlite and ferrite diphase substrate simultaneously is obtained. The coexisting spheroidal and vermicular graphite replaces the A type graphite or single spheroidal graphite or single vermicular graphite in the traditional cast iron for the cast-iron brake drum; and the pearlite and ferrite diphase substrate replaces the single pearlite or ferrite substrate in the traditional cast iron for the cast-iron brake drum. The high-temperature strength of the brake drum is enhanced, the thermal fatigue resistance of the brake drum is improved and the service life of the brake drum is prolonged.

The invention discloses a manufacturing method for an automobile transmission gear, and relates to the field of manufacturing of automobile parts. The method comprises the following steps: (1) blank forging, (2) spheroidizing annealing, (3) turning machining, (4) hobbing, (5) gear shaving, (6) carburization, (7) quenching and tempering and (8) grinding machining. According to the method, spheroidizing annealing treatment is adopted, so that the cutting performance of the gear is improved, a structure with spheroidized or granular carbide uniformly distributed on a ferrite substrate is obtained for preparation for subsequent heat treatment; a gas carburization method is adopted, and volatile kerosene is used as a carburizer, so that carburization effects are effectively improved, the thickness of a carburized layer is increased, the surface of the gear is hard and wear-proof, and high toughness of the core of the gear is maintained; quenching and tempering heat treatment is adopted after carburization, so that the carburization effects are further consolidated, and the mechanical performance of the gear is improved.

Tunable microwave magnetic devices that provide increased performance with reduced size, weight, and cost. The disclosed microwave magnetic devices are voltage-tunable devices that include ferrite substrates. To tune the devices, the magnetic permeability of the respective ferrite substrates is varied by external, voltage-tuned, magnetic fringe fields created by one or more magnetoelectric (ME) transducers.

A stripline-style ferrite phase shifter based on LTCC technology belongs to the technology of the short-wave communication device. The whole phase shifter is composed of two-layer rectangle gyromagnetic ferrite substrates clamping two-layer rectangle ceramic dielectric substrates, two paralleled magnetizing current leads and one bending microstrip line used for dephasing are clipped by the two-layer ceramic dielectric substrates; the two sides of the ferrite substrates exceeding the ceramic dielectric substrates in width are communicated with each other and form an enclosed magnetic loop. When the device is working, a ring shape silver electrode on the surface of the ferrite substrates is earthed, the impulse magnetization current is exerted to magnetize the gyromagnetic ferrite loop by the magnetizing current leads, the gyromagnetic ferrite substrates are working in remanence state after getting rid of magnetizing current; microwave signal is connected between the two termination electrodes of the bending microstip lines used for dephasing, and non-reciprocal differential phase shift is generated. Compared with the existing phase shifter, the volume and quality of the phase shifter in the invention can be greatly reduced, which is in favor of realizing the integration of phase shifter, active/passive devices and components.

The invention discloses a microwave ferrite material with gradient saturation magnetization intensities. The chemical composition of the raw materials of the material is Bi<h>Gd<k>Y<3-h-k-(a+c+2d+f)>Ca<a+c+2d+f>SnInZr<c>V<d>Al<e>Ge<f>Fe<5-a-b-c-d-e-f-delta1>O<12> and Ni<1-x+y-z>Zn<x>D<y>Sn<y>Co<z>Mn<m>Fe<2-2y-m-n-delta2>O<4>, wherein a is no less than 0 and no more than 0.5, b is no less than 0 and no more than 0.5, c is no less than 0 and no more than 0.5, d is no less than 0 and no more than 1.0, e is no less than 0 and no more than 1.0, f is no less than 0 and no more than 0.5, h is no less than 0 and no more than 1.5, k is no less than 0 and no more than 0.7, x is no less than 0 and no more than 0.5, y is no less than 0 and no more than 0.15, z is no less than 0 and no more than0.06, m is no less than 0 and no more than 0.1, delta is an iron deficiency amount, delta1 is larger than or equal to 0.02 and smaller than or equal to 0.3, and delta 2 is larger than or equal to 0.02and smaller than or equal to 0.2. The raw materials form at least two different saturation magnetization intensity areas on a substrate; the saturation magnetization intensity gradients on the microwave ferrite substrate with gradient saturation magnetization intensities can be randomly combined within the range of 47 kA/m to 414 kA/m; different saturation magnetization intensity areas can be inany shape; the problems of miniaturization and integration of microwave devices and the technical problems of miniaturization, high isolation and low insertion loss of frequency doubling and triple frequency broadband devices are solved through combination of saturation magnetization intensities of different gradients; and the preparation method is reasonable in process and suitable for application and popularization.