A5066322697- ZnO doping and properties
- Luminescence Properties of Advanced Materials
- Microwave-Assisted Synthesis and Applications
- Catalytic Processes in Materials Science
- Gas Sensing Nanomaterials and Sensors
- Microbial Inactivation Methods
- Bone Tissue Engineering Materials
- Copper-based nanomaterials and applications
- Food Drying and Modeling
- Additive Manufacturing and 3D Printing Technologies
- Solid State Laser Technologies
- Nanomaterials for catalytic reactions
- Magnetic and Electromagnetic Effects
- Glass properties and applications
- Zeolite Catalysis and Synthesis
- Pigment Synthesis and Properties
- Ga2O3 and related materials
- Aluminum Alloys Composites Properties
- Advanced ceramic materials synthesis
- Metallic Glasses and Amorphous Alloys
- Magnesium Oxide Properties and Applications
- Catalysis and Hydrodesulfurization Studies
- Electrohydrodynamics and Fluid Dynamics
- Microwave Dielectric Ceramics Synthesis
- Material Properties and Applications
Institute of High Pressure Physics
2011-2020
Polish Academy of Sciences
2008-2020
Hydroxyapatite (HAp) nanoparticles of tunable diameter were obtained by the precipitation method at room temperature and microwave hydrothermal synthesis (MHS). The following parameters nanostructured HAp determined: pycnometric density, specific surface area, phase purity, lattice parameters, particle size, size distribution, water content, structure. nanoparticle morphology structure determined using scanning electron microscopy (SEM) transmission (TEM). X-ray diffraction measurements...
The aim of the study was to investigate impact pulsed electric field (PEF) treatment on convective drying kinetics a carrot and color microstructure changes dried product. Samples were treated by PEF with specific energy input equal 5.63, 8 80 kJ · kg−1. After treatment, thermal conductivity electrical measured. Drying time PEF-treated samples reduced up 8.2% (Ws = kg−1, 5 kV cm−1; 10 pulses) in comparison intact tissue. Statistical analysis showed that Midilli et al.'s model considered...
The aim of this work was to study the influence pulsed electric field (PEF) on drying kinetics apple tissue. Therefore, mathematical models that are commonly used in literature were applied describe process. PEF treatment samples carried out at an intensity E = 5–10 kV/cm and 10–50 pulse numbers. Subsequently, apples convectively dried 70°C air velocity 2 m/s. Based electrical conductivity measurement, cell disintegration index Z p computed. Midilli et al.'s(Drying Technology, Vol. 20, pp....
Zinc oxide nanoparticles (ZnO NPs) were obtained by the microwave solvothermal synthesis (MSS) method. The precursor of MSS reaction was a solution hydrated zinc acetate in ethylene glycol with water addition. It proved that controlling concentration it possible to control size ZnO NPs programmed manner. less content precursor, smaller obtained. average particle ranging from 25 nm 50 characterised homogeneous morphology and narrow distribution sizes. following parameters determined:...
This paper reports the possibility of changing size zinc oxide nanoparticles (ZnO NPs) aggregates through a change synthesis parameters. The effect changed power microwave heating on properties ZnO NPs obtained by solvothermal from acetate dissolved in ethylene glycol was tested for first time. It found that ranged 60 to 120 nm depending radiation used NPs. increase resulted reduction total time with simultaneous preservation constant and shape single NPs, which were synthesized at pressure...
The aim of the paper is to explain mechanism zinc oxide (ZnO) nanoparticle (NP) size control, which enables control ZnO NPs obtained in microwave solvothermal synthesis (MSS) within range between circa 20 and 120 nm through water content solution acetate ethylene glycol. Heavy was used tests. explained, discussed experimentally verified. discovery investigation this possible by tracking fate molecules during whole process. All products were identified. It indicated that MSS proceeded...
The aim of this study was to analyze the influence pulsed electric field pretreatment (PEF) on osmotic dehydration apple tissue. Osmotic carried out in sucrose solution at 40°C and 100 rpm a water-bath shaker. PEF performed using varying strength 5 10 kV/cm 50 pulses. On basis conductivity measurement, cell disintegration index calculated. course described by means water loss, solid gain, weight reduction, content changes. Moreover, process different mathematical models that are commonly...
The correlation between density and specific surface area of ZrO 2 nanoparticles (NPs) was studied. NPs were produced using a hydrothermal process involving microwave heating. material annealed at 1100 °C which resulted in an increase the average grain size from 11 to 78 nm decrease 97 15 m /g. At same time, increased 5.22 g/m 3 5.87 . This effect interpreted be result presence hydroxide monolayer on NP surface. A smaller correlated with larger contribution low layer density. To prove...
This article presents the method of size control cobalt-doped zinc oxide nanoparticles (Zn1−xCoxO NPs) obtained by means microwave solvothermal synthesis. Zinc acetate dihydrate and cobalt(II) tetrahydrate dissolved in ethylene glycol were used as precursor. It has been proved example Zn0.9Co0.1O NPs (x = 10 mol %) that controlling water quantity precursor it is possible to precisely Zn1−xCoxO NPs. The following properties tested: skeleton density (helium pycnometry), specific surface area...
Zinc oxide nanopowders doped with 1–15 mol % cobalt were produced by the microwave solvothermal synthesis (MSS) technique. The obtained nanoparticles annealed at 800 °C in nitrogen (99.999%) and synthetic air. material nanostructure was investigated means of following techniques: X-ray diffraction (XRD), helium pycnometry density, specific surface area (SSA), inductively coupled plasma optical emission spectrometry (ICP-OES), extended absorption fine structure (EXAFS) spectroscopy, scanning...
Abstract The article presents a novel microwave reactor for hydrothermal synthesis of nanopowders. has unique design process chamber, which, when used in conjunction with batch control system, allows highly efficient production the together new principles operation, structural materials and distribution electromagnetic field are described. also system reactor, which an automatic operation stop–flow mode, pressure, continuous monitoring parameters safe device. device verification is shown on...
Microwave Solvothermal Synthesis (MSS) is a chemical technology, where apart from possible effects of microwaves on the reaction paths, microwave heating allows precise planning time-temperature schedule, as well to achieve high super-saturation reagents uniformly in reactor vessel. Thus, MSS suitable for production nanoparticles with small grain size distribution and degree crystallinity. A further advantage technology much lower synthesis temperature than gas phase, plasma or sol-gel...
A microwave, solvothermal synthesis of hydroxyapatite (HAp) nanopowder with a programmed material resorption rate was developed. The aqueous reaction solution heated by microwave radiation field high energy density. measurements included powder X‐ray diffraction (PXRD) and the density, specific surface area (SSA), chemical composition as specified inductively coupled plasma optical emission spectrometry technique (ICP‐OES). morphology structure were investigated using scanning electron...
Zinc oxide nanoparticles codoped with Co2+ and Mn2+ ions (Zn(1−x−y)MnxCoyO NPs) were obtained for the first time by microwave solvothermal synthesis. The nominal content of in Zn(1−x−y)MnxCoyO NPs was x = y 0, 1, 5, 10 15 mol % (the amount both equal). precursors dissolving zinc acetate dihydrate, manganese (II) tetrahydrate cobalt ethylene glycol. morphology, phase purity, lattice parameters, dopants content, skeleton density, specific surface area, average particle size, crystallite size...
Luminescence properties of cerium doped Y <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> Al xmlns:xlink="http://www.w3.org/1999/xlink">5</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">12</sub> (YAG) nanocrystals in form nanopowders and nanoceramics have been studied. The comparative analysis luminescence characteristics for nano- single-crystals has done. It was detected that an excitonic mechanism the energy transfer from host...
A high‐pressure microwave reactor was used to study the hydrothermal synthesis of zirconia powders doped with 1 mol % Pr. The performed in pressure range from 2 8 MPa corresponding a temperature 215C∘ 305C∘. This technology permits nanopowders short time not limited by thermal inertia vessel. Microwave heating avoid contact reactants elements, and is thus particularly well suited for high purity conditions. mixture ZrO particles tetragonal monoclinic crystalline phases, about 15 nm size,...