Density of porous solids

Keulen, J. Van

doi:10.1007/bf02479031

Cited by 15 publications

(7 citation statements)

References 3 publications

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“…The skeletal density of the aerogel samples was determined using a pycnometer, which was suggested for determination of the skeletal density of porous materials [32,33]. Skeletal densities of several silica aerogels were also measured by liquid pycnometry in several studies [34][35][36].…”

Section: Characterization Of Alginate Aerogel Particlesmentioning

confidence: 99%

Investigation of the effect of gel properties on supercritical drying kinetics of ionotropic alginate gel particles

Şahin

Uzunlar

Erkey

2019

The Journal of Supercritical Fluids

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Section: Characterization Of Alginate Aerogel Particlesmentioning

confidence: 99%

Investigation of the effect of gel properties on supercritical drying kinetics of ionotropic alginate gel particles

Şahin

Uzunlar

Erkey

2019

The Journal of Supercritical Fluids

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“…Apparent density didefinisikan sebagai massa material per unit volume eksternal, yang mana semua pori yang terdapat di dalam massa material termasuk di dalamnya. True density didefinisikan sebagai massa material per unit volume real, yang secara prinsip merupakan volume material tanpa adanya pori sama sekali, walaupun dalam prakteknya sebagian besar metode tidak memperhitungkan pori-pori tertutup maupun pori yang sangat sempit (Keulen, 1973 (Kurtus, 2016). Kelarutan AP di dalam air adalah 17,9 g / 100 g larutan pada 20 o C dan semakin bertambah seiring dengan adanya kenaikan suhu (Ayerst et al, 1966).…”

Section: Pendahuluanunclassified

“…Densitas propelan yang diukur pada penelitian ini dapat dikategorikan sebagai apparent density yaitu densitas per unit volume eksternal (Keulen, 1973 Pada persamaan (3-1) ditampilkan nilai densitas teoritis propelan yang dihitung dari massa dan densitas masing-masing bahan penyusunnya atau bisa disebut sebagai nilai true density (Toft, 2002) Nilai densitas hasil pengukuran (actual density) atau bisa disebut dengan apparent density mengikuti persamaan (2-1) dan (2-2) untuk Inst-2, sedangkan nilai actual density untuk Inst-1 dapat langsung dilihat pada display instrumen.…”

Section: Hasil Dan Pembahasanunclassified

Evaluasi Teknik Penimbangan Hidrostatik Pada Pengukuran Densitas Propelan Padat Komposit

et al. 2018

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Density is one of important characteristics of solid composite propellant. It is used in simulation and process design of rocket motor to get desired performance of the rocket. Density measurement performed so far using hydrosatatic weighing techniques that involve sample weighing in water, it possible to occur deviation of the measurement. The objective of this study was to find out propellant density deviation by hydrosatatic weighing techniques and found the suitable way to measure propellant density by hydrosatatic weighing techniques that could obtain the appropriate value of propellant density. Propellant samples were measured by two instruments called densitometer to find the deviation.From the research, it found that propellant density deviation was 2.08% to 5.58% with any time delay on water weighing reading of the sample. ABSTRAKDensitas menjadi salah satu data karakteristik propelan padat komposit yang penting. Data nilai densitas propelan ini digunakan dalam proses simulasi dan perancangan motor roket untuk mendapatkan performa roket yang diinginkan. Pengukuran densitas yang dilakukan selama ini menggunakan teknik penimbangan hidrostatik yang melibatkan pengukuran berat sampel di dalam air, sehingga dimungkinkan terjadi penyimpangan hasil pengukuran. Untuk itu tujuan dari penelitian ini adalah untuk mengetahui besarnya penyimpangan nilai densitas propelan yang terjadi dan mengetahui cara pengukuran yang tepat melalui teknik penimbangan hidrostatik sehingga menghasilkan nilai densitas yang lebih sesuai. Beberapa sampel propelan diukur densitasnya menggunakan dua instrumen densitometer untuk melihat adanya penyimpangan hasil pengukuran. Dari hasil penelitian diperoleh bahwa penyimpangan nilai densitas propelan yang terjadi berkisar antara 2,08% hingga 5,58% dengan adanya delay pembacaan berat sampel di air.Kata kunci: densitas propelan, penyimpangan, teknik penimbangan hidrostatik

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“…It is also important to study the pore characteristics of foundry cores to understand the flow behavior it exhibits. There are several methods to measure the pore structure of materials, including direct methods using the apparent and true densities [ 20 ], non-wetting liquid intrusion techniques, gas adsorption techniques, and microscopy/tomography techniques [ 21 ]. In this work, the mercury porosimetry technique was used to characterize the pore network in the furan samples.…”

Section: Introductionmentioning

confidence: 99%

On the Relation between the Gas-Permeability and the Pore Characteristics of Furan Sand

Sundaram

Svidró

et al. 2021

Materials

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Furan sand is one of the most commonly used chemically bonded molding materials in foundries across the world. It consists of a furfuryl alcohol-based resin and an acid-based liquid catalyst. When the molding material comes in contact with the molten metal, it undergoes a thermal shock accompanied by a certain release of volatile gases. In order to evacuate these gases, molds and cores should have optimal gas permeability values and proper venting by design. If the volatile compounds are not appropriately evacuated, they are prone to enter the melt before the first layer of solidified metal is formed which can lead to the formation of gas-related casting defects. Standard gas permeability measurements are commercially available tools used in the industry to compare and to quality control different sands, however, they only provide reference numbers without actual units. Permeability in a standard unit, m2, provides uniformity and helps the comparison of results from difference sources. In this paper, a new method using Darcy’s law (prevalent in earth sciences), was adapted to measure the gas-permeability of furan samples made of silica sand with various grain size distributions. The effect of grain size distribution on the gas-permeability of furan sand samples was studied. Gas-permeability values in m2 were then correlated with mercury-porosity measurement results to bring new light on the relation between pore size, pore volume and the permeability of molding materials.

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Density of porous solids

Cited by 15 publications

References 3 publications

Investigation of the effect of gel properties on supercritical drying kinetics of ionotropic alginate gel particles

Investigation of the effect of gel properties on supercritical drying kinetics of ionotropic alginate gel particles

Evaluasi Teknik Penimbangan Hidrostatik Pada Pengukuran Densitas Propelan Padat Komposit

On the Relation between the Gas-Permeability and the Pore Characteristics of Furan Sand

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