scholarly journals Customized MFM probes with high lateral resolution

2016 ◽  
Vol 7 ◽  
pp. 1068-1074 ◽  
Author(s):  
Óscar Iglesias-Freire ◽  
Miriam Jaafar ◽  
Eider Berganza ◽  
Agustina Asenjo
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Lateral Resolution ◽  
Stray Field ◽  
Force Microscopy ◽  
Magnetic Imaging ◽  
High Lateral Resolution ◽  
Convenient Route ◽  
Induced Changes

Magnetic force microscopy (MFM) is a widely used technique for magnetic imaging. Besides its advantages such as the high spatial resolution and the easy use in the characterization of relevant applied materials, the main handicaps of the technique are the lack of control over the tip stray field and poor lateral resolution when working under standard conditions. In this work, we present a convenient route to prepare high-performance MFM probes with sub-10 nm (sub-25 nm) topographic (magnetic) lateral resolution by following an easy and quick low-cost approach. This allows one to not only customize the tip stray field, avoiding tip-induced changes in the sample magnetization, but also to optimize MFM imaging in vacuum (or liquid media) by choosing tips mounted on hard (or soft) cantilevers, a technology that is currently not available on the market.

Preparation and Characterization of Lithium Orthosilicate Ceramic Pebbles by Melt Spraying Method

2016 ◽  
Vol 697 ◽  
pp. 818-821 ◽  
Author(s):  
You Wen Zhai ◽  
Jin Hu ◽  
Xiao Qin Zhu ◽  
Kai Jun Wang ◽  
Wei Jun Zhang
Keyword(s):  
Phase Composition ◽  
High Performance ◽  
Low Cost ◽  
Test Analysis ◽  
Crushing Strength ◽  
Test Methodology ◽  
The Mean ◽  
Lithium Orthosilicate ◽  
Spraying Method

This paper studied the experimental procedures,, test equipment and test methodology of the melt spraying method. Meanwhile, according to performance index of lithium orthosilicate (Li4SiO4) ceramic pebbles to optimize the melt spraying method. Test analysis of the diameter of orthosilicate pebbles, degree of spheroid of orthosilicate pebbles, surface topography of orthosilicate pebbles, metallographic structure of orthosilicate pebbles, section morphology, crushing strength and phase composition. Results in this work indicate that the lithium orthosilicate (Li4SiO4) ceramic pebbles with a flat or even surface，porous internals, diameter of orthosilicate pebbles between 0.9~1.1mm,density of orthosilicate pebbles more than 90%T.D., the mean crushing strength is 25N, the degree of roundness is 1.027 can be obtained by the optimized melt spraying method. The optimization process provides a basis for obtaining the low cost and high performance of the lithium orthosilicate (Li4SiO4) ceramic pebbles.

FPGA-Based Test Equipment for System-Level MEMS Switch Series

2015 ◽  
Vol 645-646 ◽  
pp. 572-576
Author(s):  
Peng Liu ◽  
Wen Zhong Lou ◽  
Yu Fei Lu ◽  
Xin Yu Feng
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Original Data ◽  
Test Equipment ◽  
System Level ◽  
Mems Switch ◽  
Real Time Analysis ◽  
Embedded Algorithms ◽  
Equipment System

A high-performance, low-cost test equipment system for characterization of MEMS switch is to be proposed in this paper, and the purpose is set to master the fundament of the embedded algorithms of the wafer and system production testing. The team has implemented the real-time analysis for MEMS switch, proving the feasibility of the design, based on the original data collected during the dedicated tests, applying the microsystem hardware designed and assembled by the research team, as well as the embedded software. At the end, the framework of the system platform in the future is described.

Preparation and characterization of low-cost high-performance mullite-quartz ceramic proppants for coal bed methane wells

2018 ◽  
Vol 25 (5) ◽  
pp. 957-961 ◽  
Author(s):  
Kaiyue Wang ◽  
Huijun Wang ◽  
Yi Zhou ◽  
Guomin Li ◽  
Yaqiao Wu ◽  
...  
Keyword(s):  
High Performance ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Low Cost ◽  
Quartz Ceramic ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Sintering Process ◽  
Flow Mechanism

AbstractIn this study, the mullite-quartz-based proppants were successfully prepared by using the coal gangue as the raw materials. Then, the effects of the additive and the sintering temperature on the composition, microstructure, and properties of the proppants were investigated. Results showed that the proppants sintered at 1250°C with the 10 wt% bauxite additive presented the best performance, which was very close to that of the quartz-proppant, and met the operational requirements of the 52 MPa coal bed methane wells. The viscous flow mechanism of the liquid phase formed during the sintering process also promoted the arrangement of the grains, thus benefiting the densification and the strength of the proppants.

scholarly journals DEVELOPMENT AND CHARACTERIZATION OF POLY(OXY-1,4-PHENYLENESULFONYL-1,4-PHENYLENE) FOR PROTON EXCHANGE MEMBRANES

2021 ◽  
pp. 1-7
Author(s):  
ANDRÉS PACHECO LANCHEROS ◽  
AURA LOMBANA PUERTA ◽  
ÁLVARO REALPE JIMÉNEZ ◽  
DINA MENDOZA BELTRAN ◽  
MARÍA TERESA ACEVEDO MORANTES
Keyword(s):  
Mechanical Properties ◽  
Contact Angle ◽  
Fuel Cell ◽  
Water Absorption ◽  
High Performance ◽  
Low Cost ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Cell Technology

Proton Exchange Membranes (PEMs) are materials developed with a focus on high-performance, low-cost features to achieve promising fuel cell technology in stationary, portable, and transportation facilities. In this study, we synthesized membranes from Poly (oxy-1,4-phenylenesulfonyl-1,4-phenylene) (PES) sulfonated with modification by adding nanoclay to improve the mechanical properties of PEMs. The sulfonation time and the concentration of nanoclays directly favored properties such as contact angle, water absorption, porosity, and mechanical properties. However, a higher concentration of nanoclays (e.g., 10% by weight) damages the mechanical properties of PES membranes specifically. The membrane with 5% by weight of nanoclay and a sulfonation time of 2 h achieved the best performance.

scholarly journals SYNTHESIS AND CHARACTERIZATION OF CATION DEFICIENT DIELECTRIC RESONATOR PEROVSKITE ELECTROCERAMICS

2021 ◽  
Vol 8 (12) ◽  
pp. 228-233
Author(s):  
Anand K Tyagi ◽  
Karamveer Kaur
Keyword(s):  
Communication Technology ◽  
High Performance ◽  
Low Cost ◽  
Ceramic Materials ◽  
Dielectric Constants ◽  
Auto Ignition ◽  
Phase Development ◽  
Nano Science ◽  
Synthesized Materials

Electroceramics are the ceramic materials that have been specially designed for specific electrical, electronic, optical or magnetic properties. The futuristic demands of Communication Technology require the advanced electroceramics that may efficiently perform the functions of various circuit elements. The performance of electroceramics and their devices is primarily dependent on the three factors namely; complex interplay between processing & chemistry, structure at many levels and device physics. This paper describes the Nano Science assisted synthesis of application grade complex titanate based electroceramics that are presently being used or have futuristic potential to be used in communication technology. A preparative scheme using Nano-powders generated by Auto-ignition method has also been outlined and phase development investigated. The optimized prepartional conditions have also been studied and complex titanates to be used as Dielectric Resonators (DR) are specially tailored to meet the demand and requirement of microwave applications for high performance and low-cost devices. The dielectric constants measured by sandwich method were found to be around 39 at 5 MHz frequency and all the samples were found to have Q-factor larger than 3500 that make the synthesized materials suitable to be used as DR in Microwave Communication Technology.

Efficient approach for optical and morphologic characterization of hybrid perovskite films based on reflectance and transmittance measurements

2021 ◽  
Author(s):  
Jorge Caram ◽  
Maximiliano Senno ◽  
Luisa Cencha ◽  
Silvia Tinte ◽  
Raul Urteaga ◽  
...  
Keyword(s):  
Low Cost ◽  
Normal Incidence ◽  
Film Deposition ◽  
Morphological Properties ◽  
Efficient Procedure ◽  
Force Microscopy ◽  
Atomic Force ◽  
Hybrid Perovskite

Abstract Organo-inorganic perovskites have been intensively studied due to its potential application in low cost and great efficient energy conversion in solar cells. Despite the great improvement in the quality of organo-inorganic perovskite films, a wide dispersion into the same batch of perovskite-based devices keep being an obstacle to obtaining highly reproducible results. For that reason new and efficient strategies for testing deposition results is imperative for the next step. Here we present a simple and efficient procedure for characterizing the optical and morphological properties based on the simultaneous reflectance and transmittance measurements under normal incidence over a MAPbI3 film. The proposed method provides qualitative and quantitative morphological information associated with the film roughness as well as information about the position of the optical gap and possible contributions to the optical dispersion in the structure that can be used as a simple diagnostic tool to optimize the film deposition. Results are contrasted and validated with electronic and atomic force microscopy, as well as first-principles calculations.

Fast elemental mapping and magnetic imaging with high lateral resolution using a novel photoemission microscope

1998 ◽  
Vol 88-91 ◽  
pp. 983-989 ◽  
Author(s):  
Ch. Ziethen ◽  
O. Schmidt ◽  
G.H. Fecher ◽  
C.M. Schneider ◽  
G. Scho¨nhense ◽  
...  
Keyword(s):  
Lateral Resolution ◽  
Elemental Mapping ◽  
Magnetic Imaging ◽  
High Lateral Resolution
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