scholarly journals Highly Conductive Ceramics with Multiple Types of Mobile Charge Carriers

Crystals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1148
Author(s):  
Sebastian Wachowski ◽  
Gilles Gauthier ◽  
Jong-Sook Lee ◽  
Sandrine Ricote
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Physical Properties ◽  
Ferroelectric Properties ◽  
Ceramic Materials ◽  
Charge Carriers ◽  
Mobile Charge ◽  
Conductive Ceramics ◽  
Functional Ceramic

Functional ceramic materials are of interest in many applications due to their structural and chemical richness and the huge range of physical properties that can be generated and modified by the control of the former (electrical conductivity, thermo-mechanical properties, dielectric, piezoelectric, ferroelectric properties, etc [...]

Ceramics in dentistry: which material is appropriate for the anterior or posterior Dentition? Part 1: materials science

Dental Update ◽  
2021 ◽  
Vol 48 (8) ◽  
pp. 680-688
Author(s):  
Loo Chien Win ◽  
Peter Sands ◽  
Stephen J Bonsor ◽  
FJ Trevor Burke
Keyword(s):  
Mechanical Properties ◽  
Clinical Research ◽  
Physical Properties ◽  
Ceramic Material ◽  
Clinical Relevance ◽  
Materials Science ◽  
Clinical Performance ◽  
Lithium Disilicate ◽  
Ceramic Materials ◽  
Posterior Teeth

The large choice of ceramic materials for an indirect restoration has given clinicians a dilemma when choosing a suitable ceramic for restorations in anterior or posterior teeth. Focusing principally on the most commonly used materials, lithium disilicate and zirconia, the aim of Part 1 of this article is to compare the mechanical properties and aesthetics of these two materials. For strength, zirconia possesses superior physical properties when compared with lithium disilicate. However, in terms of aesthetics, lithium disilicate holds advantages. With both materials having different microstructures, the same cementation protocols cannot be used. Other contemporary ceramic materials are briefly reviewed. Part 2 reviews the latest clinical research on their clinical performance. CPD/Clinical Relevance: Awareness of which ceramic material performs optimally on anterior and posterior teeth is clinically important.

Physical Properties of Porous Clay Ceramic-Ware

2011 ◽  
Vol 133 (3) ◽  
Author(s):  
A. K. Plappally ◽  
I. Yakub ◽  
L. C. Brown ◽  
W. O. Soboyejo ◽  
A. B. O. Soboyejo
Keyword(s):  
Mechanical Properties ◽  
Physical Properties ◽  
Raw Materials ◽  
Ceramic Materials ◽  
Ceramic Ware ◽  
Strength Development ◽  
Similar Materials ◽  
Ceramic Manufacture ◽  
Materials Used ◽  
Clay Ceramics

The focus of this study is on the physical properties of clay ceramic materials compatible for drinking water filtration. A multiparameter lognormal multivariate regression approach is proposed for assessing the combined effects of quantity of compositional constituent of raw materials used in ceramic manufacture on toughness. The approach was validated for two specimen types (T- and S-specimens) derived from a circular base of the frustum shaped, porous clay ceramic ware (PCCW). The PCCW were manufactured from clay and sieved sawdust mixed at distinct volume fractions. The variation of the porosity and density of the PCCW was studied with respect to the amounts of sawdust and clay used in the manufacturing. The research helped to clearly define the roles of clay and sawdust quantities for strength development in both T- and S-specimen. A generalized experimental approach is proposed for estimation of mechanical properties of clay ceramics as a function of the material constituent fractions. A polynomial relationship was developed between the compressive strength and density of the PCCW material. The statistical model expressions developed herein may be used for the prediction of material and mechanical properties of similar materials, including natural and engineered materials.

scholarly journals Optimization of compaction pressure on brick

2018 ◽  
Vol 215 ◽  
pp. 01025
Author(s):  
Ade Indra ◽  
Edison Edison ◽  
Hendri Nofrianto
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical Properties ◽  
Water Absorption ◽  
Building Materials ◽  
Compaction Pressure ◽  
Quality Standards ◽  
Ceramic Materials ◽  
Suction Rate

Bricks are one of the building materials that serves as a wall or anchoring the load. Therefore, it must be made according to the standards. In our previous observations, many found bricks were traditionally not quality, because the process of making bricks that are not right. Bricks are a class of ceramic materials that must be hard and should not be crushed when immersed in water. The method in this study focuses on optimizing compaction pressures, with printed pressures that are varied in MPa units. The results obtained as follows, in terms of mechanical properties of Compressive Strength increases with the addition of compaction pressure, an increase of 36% (brick becomes strong). In terms of physical properties of Density increased (porosity becomes smaller). For Suction rate down, this shows less water absorption. The results obtained in accordance with national and international quality standards.

Study on Mechanical Properties and Physical Properties of Copper Based Electrical Contact Materials Reinforced by CNT

2010 ◽  
Vol 139-141 ◽  
pp. 67-71
Author(s):  
Zhong Quan Guo ◽  
Hao Ran Geng ◽  
Sha Sha Feng
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Physical Properties ◽  
Sliding Wear ◽  
Electrical Contact ◽  
Wear Property ◽  
Contact Materials ◽  
Electrical Contact Materials ◽  
Made In

A new method of carbon nanotube with electroless plating of nickel is proposed. It is shown that in a certain condition, the compacted and well-distributed coating of nickel is obtained without the process of sensitization and activation. Upon the surface treatment of the carbon nanotube, the CNT-consolidated composites for copper-based electrical contact have been made in the way of powder metallurgy. Some important mechanical properties and physical properties, including sliding wear property, electrical conductivity and fusion resistance, were investigated. The experiment results showed that Carbon nanotube inside the composite was uniformly distributed and a proper addition of CNT effectively improves the comprehensive property of the composites. When the carbon nanotube takes up 4vol. % in the material, it is highly effective in improving its sliding wear property and fusion resistance; though its electrical conductivity drops. Its overall properties meet the requirements of electrical contact materials

Thermally Conductive Ceramics for Electronic Packaging

1989 ◽  
Vol 111 (3) ◽  
pp. 192-198 ◽  
Author(s):  
D. Suryanarayana
Keyword(s):  
Thermal Properties ◽  
Aluminum Nitride ◽  
Physical Properties ◽  
Thermal Performance ◽  
Electronic Packaging ◽  
Recent Literature ◽  
Ceramic Materials ◽  
Unique Material ◽  
Thermally Conductive ◽  
Conductive Ceramics

A survey was conducted on the physical properties of several new ceramic systems, such as carbides, borides, oxides, and nitrides, as they appeared in recent literature, and they are briefly reviewed. A few new ceramic materials, such as BeO, BN, AlN, and SiC-BeO, possess superior thermal properties when compared to the alumina (Al2O3) ceramics used in electronic packaging. Among these, the aluminum nitride (AlN) has emerged as unique material that can replace alumina in future electronic packaging for improved thermal performance and reliability.

scholarly journals Thermoplastic Starch–Based Composite Reinforced by Conductive Filler Networks: Physical Properties and Electrical Conductivity Changes during Cyclic Deformation

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3819
Author(s):  
Hamed Peidayesh ◽  
Katarína Mosnáčková ◽  
Zdenko Špitalský ◽  
Abolfazl Heydari ◽  
Alena Opálková Šišková ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Physical Properties ◽  
Cyclic Deformation ◽  
Conductive Polymer ◽  
Conductive Filler ◽  
Thermoplastic Starch ◽  
Melt Processing ◽  
Electrical Stress ◽  
Online Measurements

Conductive polymer composites (CPC) from renewable resources exhibit many interesting characteristics due to their biodegradability and conductivity changes under mechanical, thermal, chemical, or electrical stress. This study is focused on investigating the physical properties of electroconductive thermoplastic starch (TPS)–based composites and changes in electroconductive paths during cyclic deformation. TPS–based composites filled with various carbon black (CB) contents were prepared through melt processing. The electrical conductivity and physicochemical properties of TPS–CB composites, including mechanical properties and rheological behavior, were evaluated. With increasing CB content, the tensile strength and Young’s modulus were found to increase substantially. We found a percolation threshold for the CB loading of approximately 5.5 wt% based on the rheology and electrical conductivity. To observe the changing structure of the conductive CB paths during cyclic deformation, both the electrical conductivity and mechanical properties were recorded in parallel using online measurements. Moreover, the instant electrical conductivity measured online during mechanical deformation of the materials was taken as the parameter indirectly describing the structure of the conductive CB network. The electrical conductivity was found to increase during five runs of repeated cyclic mechanical deformations to constant deformation below strain at break, indicating good recovery of conductive paths and their new formation.

scholarly journals Effect of Adding Nano Ag on Mechanical and Physical Properties of Cu–10% Fe Prepared by Powder Metallurgy Technique

2020 ◽  
Vol 28 (1) ◽  
pp. 13-20
Author(s):  
Farouk Mahdi ◽  
Omar Mahmood
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Powder Metallurgy ◽  
Physical Properties ◽  
Low Cost ◽  
Copper Matrix ◽  
Powder Metallurgy Technique ◽  
Main Requirement ◽  
Mechanical And Physical Properties

Copper-matrix composites have received a lot of attention and are used widely in various applications, such as electronics, machinery, automobile, military and aerospace; because of their remarkable electrical conductivity, high thermal conductivity and excellent mechanical properties. Among these are copper-iron composites which found many engineering applications due to the role of Fe in enhancing the mechanical properties of these composites beside its low cost. However, Fe addition reduces electrical and thermal conductivity therefore, binary Cu-Fe composites are not suitable for applications where these properties are the main requirement. Many studies have been done to enhance these properties by the addition of alloying elements. The present work aims to study the effect of adding Nano Ag on mechanical and physical properties of Cu-10 wt% Fe composites prepared by powder metallurgy technique. The results showed the effectiveness of Nano Ag in enhancing both mechanical and physical properties of Cu-10 wt% Fe composite. It is found that bulk density, electrical conductivity, and thermal conductivity have been increased by 1.19%, 46%, and 46% respectively on adding 5% Nano Ag. Hardness and compression strength have been increased by 17.3% and 32.8% respectively by adding 4% Nano Ag, while wear rate was reduced by 13.4% by adding 4% Nano Ag.

PEMANFAATAN KAYU AKASIA MANGIUM (Acacia mangium Willd) UNTUK MEBEL

2012 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Djoko Purwanto
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical Properties ◽  
Treatment Process ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Wood Fibers ◽  
Test Parameters ◽  
Mechanical And Physical Properties ◽  
Scale Scores

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

CONDULOY

Alloy Digest ◽  
1953 ◽  
Vol 2 (10) ◽  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Physical Properties ◽  
Tensile Properties ◽  
Copper Alloy ◽  
Heat Treating ◽  
Age Hardening ◽  
Beryllium Copper ◽  
Hardening Heat Treatment

Abstract CONDULOY is a low beryllium-copper alloy containing about 1.5% nickel. It responds to age-hardening heat treatment for improved mechanical properties. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on casting, heat treating, machining, and joining. Filing Code: Cu-11. Producer or source: Brush Beryllium Company.

ALUMINUM 2011

Alloy Digest ◽  
1978 ◽  
Vol 27 (12) ◽  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
High Temperature ◽  
Physical Properties ◽  
Copper Alloy ◽  
Heat Treating ◽  
Temperature Performance ◽  
Screw Machine ◽  
Aluminum Copper Alloy

Abstract ALUMINUM 2011 is an age-hardenable aluminum-copper alloy to which lead and bismuth are added to make it a free-machining alloy. It has good mechanical properties and was designed primarily for the manufacture of screw-machine products. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Al-32. Producer or source: Various aluminum companies. Originally published October 1955, revised December 1978.

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