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Some major factors that influenced the sol-gel process including PH value, quantity of water were discussed in detail.
Introduction Aluminum nitride (AlN) has long been considered as a competitive substrate material for electronic packing applications because of its distinguished thermal and dielectric properties [1, 2].
In this paper, a glass chemically compatible with AlN substrate was obtained by sol-gel method and its properties were analyzed.
Effect of glass binder on the properties of metalized film.
Along with the increasing glass content, better wetting behavior are fond, but too much glass affects the effective contact of silver during sintering and weakens the strength of the network, resulting in the decrease of the mechanical connection between the glass and metal, thus the destruction may happen in the interface of glass and conductor layer, leading lower strength.

Dynamic Properties of Long-span Steel-concrete Composite Bridges with External Tendons Wei’an Wanga, Qiao Lib ,Canhui Zhaoc and Weilin Zhuangd School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China a vten1@163.com, b ql3721@163.com, c zch2887@163.com, d wlzhuang@vip.163.com Keywords: Steel-concrete composite bridge, Equivalent damping, Shear connectors, Dynamic property, External prestress.
The dynamic performance of large-span steel-concrete composite bridges with external tendons is investigated by deriving the formula of equivalent damping ratios of composite bridges, and by considering the influence of shear connectors stiffness of composite girders, external tendons, and pile-soil dynamic interactions on the dynamic properties of steel-concrete composite bridge.
As steel-concrete composite bridges are made from two materials that differ in their mechanical properties, the structural dampening parameters not only affect the structural dynamic energy dissipation but also closely relate to the structural response[1].
In this study, considering a long-span steel-concrete composite bridge, equivalent damper of composite structure was derived, a refined finite element model of the full bridge was constructed, and the influence of above factors on the dynamic properties of the composite bridge was analyzed.
Equivalent damping Damping is an important structural property that affects the structural dynamic response in both elastic and elastic-plastic phases, so the selection of damping parameters directly affects structural design.

The treatment enhance the properties of materials like wear resistance, hardness, dimensional stability, thermal conductivity and tool consumption rate which are recognized as a important factors in industries.
Cryogenic Cryogenic treatment has a significant role in the upgradation of tool properties used for EDM.
The procedure has been turned out to be effective in enhancing the physical and mechanical properties of the different materials such as wear, abrasion, erosion, corrosion, durability and stability [13-14].
These properties make it best suited for the applications like, press tools, blanking, forming dies and forming rolls.
Yamashita, Effects of the EDM Combined Ultrasonic Vibration on the Machining Properties of Si3N4, Materials Transactions. 51 (2010) 2113- 2120

The combination of concave model cavity shape, rivet size and sheet metals has been proved to be one of the key factors affecting riveting molding.
The orthogonal experiment table with 3 factors and 5 levels is designed in order to gain matching scheme of rivet and sheets, including 50 groups of experiments.
Rivet, top sheet and bottom sheet are taken as experiment factors.
The traditional method of inspecting joint quality is to measure joint mechanical properties through experiments.
In conclusion，punch velocity is one of the important factors which affect the joint quality of SPR of half-hollow rivets.

Analysis of biodiesel properties 2..5.1.
The analysis showed that the values of p for all the main and interacted factors were less than 0.05 indicating that the factors statistically significant remembering that the smaller the values of p means the larger the statistical significance for the factors [57].
Properties of biodiesel Biodiesel properties from sewage sludge was compared to the standard properties of biodiesel according to the specifications ASTM D 6751-2 and showed an accepted properties according to the specifications.
The analysis showed that the values of p for all the main and interacted factors were less than 0.05 indicating that the factors statistically significant remembering that the smaller the values of p means the larger the statistical significance for the factors. 6.
The biodiesel properties from sewage sludge was compared to the standard properties of biodiesel according to the specifications ASTM D 6751-2 and showed an accepted properties according to the specifications. 11.

Potassium feldspar, phosphogypsum and coke are used as raw materials to obtain soluble salts of calcined sample through mechanical grinding, roasting activation and leaching with acid.
A study has been conducted on the factors that affect the leaching ratio of K2O of calcined samples, such as the type and concentration of leaching medium, temperature, time, liquid-solid ratio.
In order to explore the relationship between potassium dissolution rate and dissolution conditions, the effect of the four factors is mainly studied, such as leaching medium type, temperature, time, liquid-solid ratio on dissolution rate of potassium of the roasting samples.
Table 1 Chemical composition of potassium feldspar Chemicals Al2O3 SiO2 TFe K2O Na2O CaO Content (%) 17.09 62.91 1.15 12.79 0.97 0.19 Table 2 Chemical composition of phosphogypsum Chemicals CaO SO3 SiO2 Al2O3 TFe K2O H2O Content(%) 30.99 40.37 7.42 0.47 0.36 0.11 19.77 Table 3 Physical properties and chemical composition of coke Content Ash （%） Volatile（%） Fixed carbon （%） Calorific value (Cal/g） Ash composition（%） SiO2 S Al2O3 CaO Mass ratio 15.94 6.99 76.27 6711.18 57.80 0.87 21.30 9.67 2.2 The experiment principle and methods Si-A1-O bond of potassium feldspar is extremely stable and reflects a higher melting point (about 1500 ℃) and the larger melting range [5-6].

Composition and microstructure are the main factors affecting the corrosion resistance of metallic materials.
These brittle intermetallic compounds reduce the mechanical properties of the joint [16].
Aluminum-Zinc phase diagram [15] Three important factors affect corrosion resistance: the quenching rate determines the dendritic arrangement, the redistribution of solutes in the solute/solvent pair of each alloy, and the electrochemical properties. of the anode or cathode.
Yang, “Microstructure, mechanical properties and corrosion properties of Mg-Zn-Y alloys with low Zn content,” Mater.
Feng, “Effects of Zn on microstructure, mechanical properties and corrosion behavior of Mg-Zn alloys,” Mater.

Our previous study [1] revealed that CaTiO3 film (K~160, tan δ ~0.003+=0.0003 and TCK~ -1340 ppm/℃ at 6 GHz) and MgTiO3 film (K~ 16, tan δ~ 0.0008+=0.0001, TCK~ +260 ppm/℃ at 6 GHz) exhibited the quite different microwave dielectric properties.
Thermal stress can lead to mechanical (structural) as well as to functional (electrical or optical) failures [4], and this stress is a very significant factor affecting the dielectric properties of materials.
It was reported that the dielectric properties were affected by thermal stress in the interface between the film and the substrate [6].
In this study, the dielectric properties of (300-X) nm MgTiO3/(X) nm CaTiO3 thin films have been investigated with correlation between interface and stress induced by dielectric layers with heattreatment.
The microwave dielectric properties were measured using a circular-patch capacitor geometry with a network analyzer (HP873Es, Aligent) [8].

The factors that affect the behavior of an RCC dam had been studied.
It should be ensured that the aggregate segregation would not occur, especially in the lower portion of the lift, to maintain good mechanical properties and density [8, 37].
Sravani, Study on Mechanical Properties of Concrete Using Silica Sand as Partial Replacement of Cement, SSRG – IJCE 4 (5) (2017) 34-37
A, Factors Influencing Ultrasonic Pulse Velocity in Concrete, Revista IBRACON de Estruturas e Materiais 13 (2) (2020) 222-247
Narjes, Classification-Based Regression Models for Prediction of the Mechanical Properties of Roller-Compacted Concrete Pavement, Applied Sciences 10 (11) (2020) 1-22

Bombyx mori silk, though used in biomedical sutures for decades due to its excellent mechanical properties, has been overlooked for applications in ligament tissue engineering, only until recently.
Comparing with other natural fibers, silk bears superior mechanical properties in terms of strength and elasticity [5].
Silk also consists of diverse amino acid side chemistries for facile coupling of selected growth or cell adhesion factors [8].
The feasibility of tissue engineered ligament construct also depends largely on the scaffold architecture, which affects important properties such as mechanical behavior and cell support capabilities.
Table 1 shows the tensile properties of the knitted silk scaffolds.