Mineralogy and micromorphology of İznik ceramics

1998 ◽  
Vol 48 ◽  
pp. 181-189 ◽  
Author(s):  
S. Kapur ◽  
N. Sakarya ◽  
E. A. Fitzpatrick ◽  
M. Pagliai ◽  
G. Kelling ◽  
...  
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Temperature Rise ◽  
Raw Materials ◽  
The Body ◽  
Uniform Temperature ◽  
Fibrous Minerals ◽  
Materials Used

AbstractThe study of İznik ceramics of different periods revealed that temperatures of about 800–900°C were produced during firing. Glass fragments added to the body for strengthening resulted in the formation of fibrous minerals as clusters in the pores and protruding in the glaze together with Ca and P rich minerals in the raw materials used. The pore size distribution of the pores indicates a uniform temperature rise and fall during the production of the microstructure.

Properties and Structure of Micro Porous Mullite-Corundum Refractory with High Strength

2010 ◽  
Vol 105-106 ◽  
pp. 23-26
Author(s):  
Juan Wu ◽  
Dao Yuan Yang ◽  
Kai Zhu ◽  
Rui Zhang
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Raw Materials ◽  
High Strength ◽  
Casting Process ◽  
Solid Content ◽  
Apparent Porosity ◽  
Corundum Refractory ◽  
Low Viscosity

Mullite- corundum ceramic was fabricated using bauxite and silica fume as raw materials by gel-casting process. The fluidity of the slurry, as well as strength, apparent porosity, pore size distribution, phase composition and microstructure of sintered specimen were studied. The results showed that: the slurry had low viscosity, good fluidity for casting if pH=9, dispersant 0.33wt% and solid content 60vol%; the strength of material came up to 165MPa even if the apparent porosity was about 30%; the samples were characterized by mullite 70%, corundum 22%, rutile 3%, glass phase only 5%, the size of majority grains was about 2μm, and most crystals with high melting point bonded directly; the average aperture was 264nm, the pore size distribution were divided into 2~30nm, 45~60nm and 1500~4000nm three regions. The distribution probability of nano- aperture was the largest, the volume of micron -aperture was the maximum, but all pores were less than 4μm in diameter, which suggested that the materials had micro porous characteristics. The microcrystalline, crystals combined directly and micro porous structure leaded to high strength of the refractory materials together.

scholarly journals Study of an alkali-activated binder based on tungsten mining mud and brick powder waste

2018 ◽  
Vol 163 ◽  
pp. 06002 ◽  
Author(s):  
Naim Sedira ◽  
João Castro-Gomes
Keyword(s):  
Compressive Strength ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Raw Materials ◽  
Weight Ratio ◽  
Alkali Activation ◽  
X Ray Diffraction ◽  
Brick Powder ◽  
Alkali Activated

Blends of Tungsten mining waste mud (TMWM) and brick waste powder (BP) with different dosages were used as precursors for the study of a new binder obtained by alkali-activation. The synthesis was obtained at 60ºC curing during the first 24 hours and at 20°C during the remaining period. A combination of sodium hydroxide (SH) and sodium silicate (SS) solutions was used with SS/SH weight ratio equal 1.5. The solid precursors/liquid activators weight ratio equal to 4. And the modules SiO2/Na2O increase with the increasing of BP dosages 5.21 and 5.59 for dosages 10% and 50%, respectively. Mineralogical characterisation of raw materials was carried out by X–ray diffraction (XRD). The effect of the dosage of BP on the compressive strength and pore size distribution of the new binder was investigated from 24 hours up to 28 days. The pore size distribution was obtained mercury intrusion porosimetry (MIP). The increase in the dosages of BP, between 10 to 50%, was followed by an increase in compressive strength, from 25 to 59 MPa, for all the tested ages. The binder matrix become more dense and compact with the gradually increase of BP dosages, as found out by MIP.

Effect of Manifold Geometry on the Physical Performance of the Hydroentangled Nonwovens

2011 ◽  
Vol 332-334 ◽  
pp. 1291-1294
Author(s):  
Xiang Qin Wang ◽  
Xiang Yu Jin ◽  
Qin Fei Ke
Keyword(s):  
High Pressure ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Physical Performance ◽  
Abrasion Resistance ◽  
Raw Materials ◽  
Simulation Data ◽  
Good Agreement

In this paper, two kinds of hydroentangled nonwovens made from the same raw materials and process but different high pressure manifolds is tested to investigate the effect of manifold geometry on the physical performance of products. The results show that the sample treated by slot type manifold has better properties, which has higher hydroentanglement intensity and better abrasion resistance, but no big difference with the pore size distribution. The results are in good agreement with our previous simulation data.

scholarly journals Determination of suitable raw materials for preparation of frost resistant brick body and its evaluation according to pore size distribution

2015 ◽  
Vol 123 (1441) ◽  
pp. 868-873
Author(s):  
Mikulas SVEDA ◽  
Matej KERESTUR ◽  
Radomir SOKOLAR ◽  
Lenka NEVRIVOVA ◽  
Stanislav UNCIK
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Raw Materials

pyGAPS: A Python-Based Framework for Adsorption Isotherm Processing and Material Characterisation

2019 ◽  
Author(s):  
Paul Iacomi ◽  
Philip L. Llewellyn
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Surface Area ◽  
Isosteric Heat ◽  
Material Characterisation ◽  
Mixture Adsorption ◽  
Surface Energetics ◽  
Adsorption Processing ◽  
User Friendly

Material characterisation through adsorption is a widely-used laboratory technique. The isotherms obtained through volumetric or gravimetric experiments impart insight through their features but can also be analysed to determine material characteristics such as specific surface area, pore size distribution, surface energetics, or used for predicting mixture adsorption. The pyGAPS (python General Adsorption Processing Suite) framework was developed to address the need for high-throughput processing of such adsorption data, independent of the origin, while also being capable of presenting individual results in a user-friendly manner. It contains many common characterisation methods such as: BET and Langmuir surface area, t and α plots, pore size distribution calculations (BJH, Dollimore-Heal, Horvath-Kawazoe, DFT/NLDFT kernel fitting), isosteric heat calculations, IAST calculations, isotherm modelling and more, as well as the ability to import and store data from Excel, CSV, JSON and sqlite databases. In this work, a description of the capabilities of pyGAPS is presented. The code is then be used in two case studies: a routine characterisation of a UiO-66(Zr) sample and in the processing of an adsorption dataset of a commercial carbon (Takeda 5A) for applications in gas separation.

Mutual Influence Study of Food Acids and Polysaccharides of Different Nature on the Sensory Perception of Low-Calorie Sweet Dishes

Food Industry ◽  
2020 ◽  
Vol 5 (2) ◽  
pp. 71-78
Author(s):  
Ekaterina Minnikhanova ◽  
Nataliya Zavorokhina ◽  
Anna Gilina
Keyword(s):  
Mutual Influence ◽  
Raw Materials ◽  
Sucrose Solution ◽  
Complex Mixture ◽  
The Body ◽  
Sensory Characteristics ◽  
Apple Pectin ◽  
Low Calorie ◽  
Functional Reserves ◽  
Materials Used

Abstract The inclusion of polysaccharide thickeners in the recipes of sweet dishes increases the functional reserves of the body, contributes to the preservation of health and the prevention of diseases. The purpose of the research is to study the sensory characteristics of polysaccharides of various nature when combined with food acids, to develop a recipe for a basic mixture of low-calorie meals for public catering. The authors analyzed citric, lactic and succinic acids in combinations with polysaccharides of various nature. Organoleptic tests were evaluated by a touch panel. The organization of the tasting analysis corresponded to GOST ISO 6658-2016; the consistency was determined according to GOST 31986-2012, GOST ISO 11036-2017, GOST ISO 8588-2011. The optimal organoleptic combinations of the presented food acids and complex additives of sweeteners (CDP) were identified, which included aspartame, sodium saccharinate, Sucralose, sweetness coefficient – 340: the mixture with citric acid had a long pleasant aftertaste without foreign tastes and the best taste characteristics. Using the “A-not A” method, we found that the sample with the addition of CDP is identical to the sucrose solution. In the second part of the study, polysaccharides were added to model samples of acids with complex sweeteners; the best sensory characteristics were obtained by model samples consisting of a mixture of low-esterified Apple pectin with lactic acid and KDP. The technology of obtaining a stable elastic jelly using low-esterified Apple pectin has been developed, since the complex mixture of sweeteners and food acids does not have a dehydrating effect. Developed a dry mix recipe that can serve as a basic development, low-calorie sweet products for catering and has a variance of use of lactic and succinic acids, depending on the flavor characteristics of the raw materials used and its corrective ability.

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