Search results for "sinter"

P-Value, Confidence Intervals, and Statistical Inference: A New Dataset of Misinterpretation

2017

Statistical inference is essential for science since the twentieth century (Salsburg, 2001). Since it's introduction into science, the null hypothesis significance testing (NHST), in which the P-value serves as the index of “statistically significant,” is the most widely used statistical method in psychology (Sterling et al., 1995; Cumming et al., 2007), as well as other fields (Wasserstein and Lazar, 2016). However, surveys consistently showed that researchers in psychology may not able to interpret P-value and related statistical procedures correctly (Oakes, 1986; Haller and Krauss, 2002; Hoekstra et al., 2014; Badenes-Ribera et al., 2016). Even worse, these misinterpretations of P-value …

Effect of sintering process and additives on the properties of cordierite based ceramics

2013

It is possible to obtain cordierite ceramics with high temperature synthesis using both synthetic and raw natural materials. This paper discusses the possibilities to obtain cordierite ceramics, replacing part of required oxides with raw materials from various Latvian deposits of dolomite and clay. The obtained raw cordierite powders were ground in two modes (3 and 12 hours) and fired at 1200 °C. Ceramic samples were characterized by hydrostatic weighting method; crystalline phase composition was studied by XRD. Obtained samples were evaluated by their mechanical (compressive) strength and linear coefficient of thermal expansion (CTE). Thermal shock resistance was tested using water quenchi…

Peculiarities of luminescent properties of cerium doped YAG transparent nanoceramics

2010

Abstract Optical and luminescence properties of transparent nanosized cerium doped Y 3 Al 5 O 12 (YAG:Ce) ceramics have been studied. YAG:Ce nanoceramics were obtained by means of low temperature and high pressure (LTHP) sintering method. Nanoceramic samples were sintered in the 2–8 GPa pressure range, whereas Ce 3+ concentration was varied in the 0.5–5 at. % range. It is shown that, in contrast to the single crystal, a strong rise of absorption coefficient was detected already at wavelength shorter than 400 nm in all nanoceramic samples studied. Furthermore, in nanoceramic samples unusual UV emission band near 3.1 eV was observed, which is not observed in the YAG:Ce single crystal. High pr…

The luminescence of ZnO ceramics

2010

Abstract The luminescence properties of ZnO ceramics with grains 100–5000 nm sintered by different techniques from nanopowders were studied. The luminescence decay times were compared with that obtained for ZnO single crystal. The temperature dependence of non-exponential decay of defect luminescence (2.0–2.6 eV) was measured in wide time, intensity and temperature range. The luminescence decay kinetic at T ≤ 20 K shows the decay close to I(t) ∼ t−1 dependence. At temperature region 50–250 K the decay kinetics is more complicate since the TSL was observed in this temperature region. It is shown that the luminescence properties of NP and ceramics strongly depend on defect distribution on gra…

Luminescence of ZnO nanopowders

2004

Abstract The luminescence of ZnO nanocrystals prepared by different methods was studied under pulsed electron beam excitation. It is shown that the luminescence intensity depends on the nanocrystal sintering conditions and does not depend on the nanocrystal size within the range 10–50 nm. The relative luminescence intensities for the 3.32 eV (free exciton) and ∼3.20 eV (bound exciton) bands showed a dependence on nanocrystal size. The role of the nanocrystal surface in excitonic luminescence is discussed.

Radioluminescence, thermoluminescence and dosimetric properties of ZnO ceramics

2017

The authors gratefully acknowledge the financial support for this work from research grant ERA.NET RUS Plus Nr.609556 and from the SFERA II project Transnational Access activities (EU 7th Framework Programme Grant Agreement no 312643) for supporting ZnO nanopowders preparation.

LA FOTOCATALISI ETEROGENEA UTILIZZATA COME METODO PER LE SINTESI ORGANICHE SELETTIVE IN CONDIZIONI SPERIMENTALI BLANDE

2014

Nel corso di questi tre anni di Dottorato di Ricerca in “Tecnologie per la Sostenibilità ed il Risanamento Ambientale”, XXIV ciclo, presso il laboratorio di ricerca di fotocatalisi eterogenea “Schiavello-Grillone”, sono stati sviluppati processi innovativi per la produzione selettiva di specie organiche ad alto valore aggiunto, seguendo i principi della Chimica Verde; in particolare sono state studiate reazioni di ossidazione parziale di composti aromatici. La metodologia prevalentemente utilizzata è stata la fotocatalisi eterogenea mediante l’utilizzo del biossido di Titanio policristallino (TiO2) come fotocatalizzatore, utilizzato sospeso in soluzione acquosa o immobilizzato su supporti r…

Phenomenal Change And Adolescents’ Psychological Disinterest In Commitments: A Concern For The Family Traditions

2015

The phenomenal changes such as biological, physical, social, technological and global changes, vitally affect the psychological uncertainty and pre-occupation in the minds of the adolescents. (Leckman et al., 2002, p.324). A lethargic attitude, avoidance of responsibility creeps into their system during this period, leading them to more socialising and less psychological commitments. (Jakubowski & Dembo, 2004). Researches show that Adolescents who were isolating themselves from family events and desiring only social events outside family tend to develop ‘low levels of commitment and self-regulatory resources, and they perceived their parents as being low in trust, openness, and supervision.…

La izquierda pierde por copiar a la derecha. 14 intelectuales europeos explican el hundimiento de la socialdemocracia

2009

Numerical modeling of the solid-state sintering at the microstructural level: Multiphysics approach and application to metal additive manufacturing

2023

Numerical modeling of the solid-state sintering at the microstructural level: Multiphysics approach and application to metal additive manufacturing