scholarly journals Physical Properties and Compressive Strength of Zinc Oxide Nanopowder as a Potential Dental Amalgam Material

2018 ◽  
Vol 7 (2) ◽  
pp. 97
Author(s):  
Nanang Qosim ◽  
Putut Murdanto ◽  
Poppy Puspitasari
Keyword(s):  
Compressive Strength ◽  
Zinc Oxide ◽  
Physical Properties ◽  
Dental Amalgam ◽  
Hydraulic Press ◽  
Ease Of Use ◽  
Green Density ◽  
Compression Load ◽  
Zno Nanopowder ◽  
New Material

In this study, the application of nanotechnology was applied in the dentistry field, especially in the innovation of dental amalgam material. To date, mercury (Hg) has been used widely as dental amalgam material with consideration of the cheap price, ease of use, and good mechanical strength. However, last few years, many problems have been faced in the dentistry field due to the use of mercury. Hence, new material is needed as an innovation to eliminate the mercury from dental amalgam composition. This research was conducted to analyze the physical properties and compressive strength of zinc oxide (ZnO) nanopowder as a potential dental amalgam material. The physical properties such as morphology and dimensions were analyzed by SEM and XRD. Further, the compression test was conducted by using hydraulic press machine. The results showed that the ZnO nanopowder analyzed has the particle size of 14.34 nm with the morphology classified as nanorods type. On the compression load of 500 kg, the average of ZnO green density is 3.170 g/cm<sup>3</sup>. This value experienced the increase of 4.763% when the load was set to 1000 kg, and 7.539% at 2000 kg. The dwelling time also took the same effect. At 30 seconds, the average of ZnO green density is 3.260 g/cm<sup>3</sup>. This value experienced the increase of 0.583% at 60 seconds and 3.098% at 90 seconds.

Analysis on Compressibility of Dental Amalgam Using Nanomaterial Zinc Oxide (ZnO)

2015 ◽  
Vol 1125 ◽  
pp. 470-473
Author(s):  
Poppy Puspitasari ◽  
Andoko
Keyword(s):  
Zinc Oxide ◽  
Physical Properties ◽  
Dental Amalgam ◽  
Compression Loading ◽  
Dwelling Time ◽  
Compression Load ◽  
Biocompatible Material ◽  
Alternative Material ◽  
Physical Features

The more increasing severe impact of the mercury use on health, particularly as the amalgam material, has required an alternative innovation in order to eliminate the composition of mercury and amalgam. The objective of this research was to proposed a new biocompatible material which was called zinc oxide (ZnO). One of the innovative breakthroughs is by applying nanotechnology to ZnO, an alternative material expectedly to have better physical features and compressibility. Those physical features here including morphology, dimensions, and the comparison ratio of atom were analyzed through the test of XRD, XRF, SEM, and EDX characterization. Further, for its compressibility features, the test of compressibility was carried out using the hydraulic pressing machine with the power of 100-4000 kgf. This test was treated variously on the compression loading (500, 1000, and 2000 kg) with the variety of dwelling times (30, 60 and 90 seconds) purposely to observe its effect on the density of nanoparticles ZnO. The result of this research then shows that the physical properties of the analyzed ZnO has the particle in the size of 14,34 nm with the morphology classified as nano­rods. In the compressibility test, the variation of compression loadings has brought an effect on the significant increase of density of nanoparticles ZnO. In the compression loading at 500 kg, the average of density of ZnO is at 3,170 (g/cm3) with the increase of 4,763% with the addition of the compression loading into 1000 kg. Subsequently, another increase of density again takes place by 7, 539 % in the compression load changed into 2000 kg. The variation of the dwelling times also contributed to an equal effect in which at the dwelling time of 30 seconds, the average of density of ZnO was at 3,260 (g/cm3), at the dwelling time of 60 seconds, it increased at 0,583%, and the dwelling time of 90 seconds, it again increased at 3,098%.

Correlation Relationships between Properties of Brick Body and their Use in Building Practice

2014 ◽  
Vol 899 ◽  
pp. 393-398
Author(s):  
Mikuláš Šveda ◽  
Radomír Sokolař
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Correlation Function ◽  
Physical Properties ◽  
Pore Structure ◽  
Hydraulic Press ◽  
Exit Speed ◽  
Building Practice

The regular exit check of the brick products is an important step as to meet the quality in brickworks. These products are characterized by pore and lightweight brick body, therefore, their physical properties depend primarily on the specific characteristics their pore structure. We can determine on the basis of one well-known property and the correlation relationships other characteristics of the brick body, since there is an assumption that these properties between themselves "connected". Authors propose to use this knowledge in the exit speed check directly at the factory. In this case could be monitored only one property and one that can be quickly and reliably determined, such as thermal conductivity of using an apparatus Isomet. It is then possible to set for the existence of a correlation function between thermal conductivity and compressive strength of brick body at regular intervals compressive strength without using a hydraulic press.

The influence of the addition of ground olive stone on the thermo-mechanical behavior of compressed earth blocks

2020 ◽  
Vol 108 (2) ◽  
pp. 203
Author(s):  
Samia Djadouf ◽  
Nasser Chelouah ◽  
Abdelkader Tahakourt
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Mechanical Behavior ◽  
Agricultural Waste ◽  
Hydraulic Press ◽  
Dry Density ◽  
Olive Stone ◽  
Compressed Earth Blocks ◽  
Clay Matrix ◽  
Earth Blocks

Sustainable development and environmental challenges incite to valorize local materials such as agricultural waste. In this context, a new ecological compressed earth blocks (CEBS) with addition of ground olive stone (GOS) was proposed. The GOS is added as partial clay replacement in different proportions. The main objective of this paper is to study the effect of GOS levels on the thermal properties and mechanical behavior of CEB. We proceeded to determining the optimal water content and equivalent wet density by compaction using a hydraulic press, at a pressure of 10 MPa. The maximum compressive strength is reached at 15% of the GOS. This percentage increases the mechanical properties by 19.66%, and decreases the thermal conductivity by 37.63%. These results are due to the optimal water responsible for the consolidation and compactness of the clay matrix. The substitution up to 30% of GOS shows a decrease of compressive strength and thermal conductivity by about 38.38% and 50.64% respectively. The decrease in dry density and thermal conductivity is related to the content of GOS, which is composed of organic and porous fibers. The GOS seems promising for improving the thermo-mechanical characteristics of CEB and which can also be used as reinforcement in CEBS.

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.

The Effect of Dry Mix Sodium Hydroxide onto Workability and Compressive Strength of Geopolymer Paste

2020 ◽  
Vol 12 (9) ◽  
Author(s):  
A. Z. Mohd Ali ◽  
◽  
N. A. Jalaluddin ◽  
N. Zulkiflee ◽  
◽  
...  
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Sodium Hydroxide ◽  
Sodium Silicate ◽  
Alkaline Solution ◽  
High Emission ◽  
New Material ◽  
Curing Regime ◽  
Solid Form ◽  
Geopolymer Paste

The production of ordinary Portland cement (OPC) consumes considerable amount of natural resources, energy and at the same time contribute in high emission of CO2 to the atmosphere. A new material replacing cement as binder called geopolymer is alkali-activated concrete which are made from fly ash, sodium silicate and sodium hydroxide (NaOH). The alkaline solution mixed with fly ash producing alternative binder to OPC binder in concrete named geopolymer paste. In the process, NaOH was fully dissolved in water and cooled to room temperature. This study aims to eliminate this process by using NaOH in solid form together with fly ash before sodium silicate liquid and water poured into the mixture. The amount of NaOH solids were based on 10M concentration. The workability test is in accordance to ASTM C230. Fifty cubic mm of the geopolymer paste were prepared which consists of fly ash to alkaline solution ratio of 1: 0.5 and the curing regime of 80℃ for 24 hours with 100% humidity were implemented. From laboratory test, the workability of dry method geopolymer paste were decreased. The compressive strength of the dry mix of NaOH showed 55% and the workability has dropped to 58.4%, it showed strength reduction compared to the wet mix method.

COLMONOY No. 83 PTA

Alloy Digest ◽  
1995 ◽  
Vol 44 (12) ◽  
Keyword(s):  
Wear Resistance ◽  
Compressive Strength ◽  
Physical Properties ◽  
Tungsten Carbide ◽  
Tensile Properties ◽  
Powder Metal ◽  
Application Method ◽  
Plasma Transferred Arc ◽  
Transferred Arc ◽  
Nickel Base

Abstract COLMONOY No. 83 PTA is a nickel-base hard surfacing alloy containing tungsten carbide. The application method is plasma transferred arc and the application is designed to protect extrusion screws. This datasheet provides information on composition, physical properties, microstructure, hardness, tensile properties, and compressive strength. It also includes information on wear resistance as well as machining and powder metal forms. Filing Code: Ni-493. Producer or source: Wall Colmonoy Corporation.

FEDERALOY F-1

Alloy Digest ◽  
1954 ◽  
Vol 3 (8) ◽  
Keyword(s):  
Fracture Toughness ◽  
Compressive Strength ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Temperature Performance

Abstract Federaloy F-1 is a copper tin-zinc bearing bronze whose strength suits it for applications where loads are heavy. It should be used only where lubrication is exceptionally good or motion is of a rocking nature. It is also a good gear bronze. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength as well as fracture toughness, creep, and deformation. It also includes information on high temperature performance and corrosion resistance as well as casting, machining, and joining. Filing Code: Cu-19. Producer or source: Federal-Mogul Corporation.

COLMONOY No. 6

Alloy Digest ◽  
1963 ◽  
Vol 12 (1) ◽  
Keyword(s):  
Compressive Strength ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Base Alloy ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
High Carbon ◽  
Nickel Base

Abstract Colmonoy No. 6 is a high-carbon, nickel-base alloy recommended for hard facing parts to resist wear, corrosion, heat and galling. This datasheet provides information on composition, physical properties, hardness, elasticity, and compressive strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-78. Producer or source: Wall Colmonoy Corporation.

MOLDSTAR 90

Alloy Digest ◽  
2005 ◽  
Vol 54 (3) ◽  
Keyword(s):  
Compressive Strength ◽  
Injection Molding ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Copper Alloy ◽  
High Performance ◽  
Blow Molding

Abstract MoldStar 90 is a high-performance beryllium-free copper alloy for the blow-molding and injection-molding industries. This datasheet provides information on composition, physical properties, hardness, tensile properties, and compressive strength. It also includes information on machining, joining, and surface treatment. Filing Code: CU-732. Producer or source: Performance Alloys.

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