Abstract In this paper, a new type of porous ceramics was prepared using the raw sepiolite mineral. The shaped by dry pressing method and sintered in range 700 ~ 1200 °C. temperature-microstructure evolution properties were investigated thermo gravimetric differential thermal analyses (TG-DTA), X-ray diffraction (XRD), bending strength, compressive scanning electron microscopy (SEM) mercury intrusion porosimeter (MIP). sintering kinetics from means stepwise isothermal dilatometry (SID)....

Abstract In this study, the morphological evolution and sintering properties of palygorskite nanofibers were studied along with increase temperature, using raw as materials. The powder was calcined at different temperatures in range 100°C‐1200°C, microstructural investigated by thermogravimetric differential thermal analysis (TG‐DTA), X‐ray diffraction (XRD), scanning electron microscopy (SEM), high‐resolution transmission microscope (HRTEM). Furthermore, shaped to bars dry pressing sintered...

Abstract A frequency servo system-on-chip (FS-SoC) featuring output power stabilization technology is introduced in this study for high-precision and miniaturized cesium (Cs) atomic clocks. The proposed loop (PSL) technique, incorporating an off-chip detector (PD), ensures that the of FS-SoC remains stable, mitigating impact fluctuations on clock's stability. Additionally, a one-pulse-per-second (1PPS) employed to synchronize clock with GPS. Fabricated using 65 nm CMOS technology, measured...

Abstract Notched components are commonly used in engineering structures, where stress concentration may easily lead to crack initiation and development. The main goal of this work is develop a simple numerical method predict the strength crack‐growth‐path U‐notched specimens made brittle materials. For purpose, Fragile Points Method (FPM), as previously proposed by authors, has been augmented an interface debonding model at interfaces FPM domains, simulate formulations based on discontinuous...

The work investigated the effect of sepiolite nanofibres on mechanical properties and sintering behaviour shellfish porcelain. Samples porcelain reinforced by were fired in an electric furnace at 1150, 1200 1250°C for a period 80, 100, 120 140 min. Sintered samples characterized flexural strength, fracture toughness, scanning electron microscopy, transmission microscopy X-ray diffraction. results showed that 2 wt% could increase strength toughness bodies through fibre pullout weak interface...

Based on the continuum damage mechanics theory, fatigue life prediction for 30CrMnSiA alloy steel with impact defect is conducted. At first, evolution equations to calculate initial plastic and multiaxial are derived. Then method calibrate three kinds of material parameters proposed all obtained. The mechanics-finite element predict used, in which coupling relation between field stress taken into account. last, predicted test conducted validate aforementioned approach.

The main goal of this work is to study the ballistic performance multi-layered moderately-thick metallic targets. Several target configurations have been considered in work, with various types interlayer connection (spaced, contacted and adhesive) number layers (four eight), influence on has studied experimentally numerically. In experiments, targets were impacted by 12.7-mm projectiles at a velocity around 820 m/s. experimental results show that, similar total thickness, adhesive exhibit...

The effects of chlorine (Cl) and zinc (Zn) co-doping on the electronic structure optical properties blende ({\gamma}) phase copper iodide ({\gamma}-CuI) scintillator material are investigated by using first-principles density functional theory calculations. band structure, states, dielectric function, absorption coefficients, reflectivity were analyzed before after doping. Results show significantly modifies reduces gap, generates impurity energy levels. Cl doping enhances in high region...

This paper presents an ultra-compact 114-to-147-GHz 6-bit passive vector-modulated phase shifter (P-VMPS) with a compact matching network (MN) embedded isolated power combiner. The proposed combiner consists of two coupled-line-based distributed-baluns connected in parallel to achieve impedance matching, combining and balanced-to-unbalanced transformation. Extra coupled-lines RC networks are added between the differential ports for isolation performance enhancement. By absorbing...

The sintering process of bone china bodies containing 0, 2, 4, and 6 wt % palygorskite was studied by X-ray diffraction (XRD), differential scanning calorimetry thermogravimetry (DSC/TG), dilatometric tests. According to the XRD DSC/TG results, increment increased content amorphous phase reduced formation temperature early liquid in bodies. shrinkage data showed that starting maximum stage liquid-phase decreased 20 15 °C via adding palygorskite, respectively. Also, rose with increasing...

Abstract Heavy metals can bring health risks through the enrichment of crops and food chain, but there are few reports on their impact nutritional quality crops. In this paper, hydroponic-culturedpea seedlings under lead cadmium stress were used to evaluate heavy metal effects growth, safety nutrients variation. Lead has little effect sprout it mainly concentrates in roots seldom be transferred edible parts. It would not hazards parts stems leaves decrease mineral nutrientsin peasprout...

A new automatic design framework for on-chip passive devices working in terahertz is presented, which has three sections: optimization engine, black box model and schematic circuit simulation. The engine generates variables the layout gets its S-parameter. Then, simulator will generate target value send it to next circulation. hairpin filter 130nm SiGe designed using this framework, with a frequency of 262GHz bandwidth 36GHz. Its S11 less than -15.3dB S21 more -4.5dB bandwidth, thereby...

A frequency servo system-on-chip (FS-SoC) with background output power calibration technique is presented in this work for compact and ultra-low cesium atomic clocks. With the stabilization loop (PSL) technique, of proposed FS-SoC stabilized to improve accuracy Manufactured 65nm CMOS, measured achieve phase noise performance -69.5dBc/Hz@100Hz offset -83.9dBc/Hz@1kHz respectively a consumption 19.7mW. Meanwhile, (Cs) clock using PSL obtains an allan deviation 1.7x10 <sup...

The cover image is based on the Research Article A Fragile Points Method, with an interface debonding model, to simulate damage and fracture of U-notched structures by Kailei Wang et al., https://doi.org/10.1002/nme.6914.

In this paper, a D-band direct conversion IQ receiver with on-chip multiplier chain is presented. The LNA gain-boosting and stagger-tunning technique implemented to provide high gain large bandwidth. X9 including Marchand balun quadrature (90°) hybrid employed four path LO signal drive mixer. This in 130nm SiGe process consumes core area of 1.04 mm2. From the experimental results, proposed exhibits 20 GHz bandwidth from 150 170 GHz, CG 28 dB NF 7.3 at 158 GHz.

Notched components are commonly used in engineering structures, where stress concentration may easily lead to crack initiation and development. The main goal of this work is develop a simple numerical method predict the structural strength crack-growth-path U-notched specimens made brittle materials. For purpose, Fragile Points Method (FPM), as previously proposed by authors, has been augmented an interface debonding model at interfaces FPM domains, simulate formulations based on...