Results 11 to 20 of about 14,537 (221)

Bioactivity of leucite containing glass - ceramics using natural raw materials [PDF]

open access: yesMaterials Research, 2014
Glass compositions were carefully prepared, using natural quartz and potassium feldspar as a part of the starting raw materials. The solids were prepared so as to have theoretical stoichiometric leucite and 45S5 Bioglass in different L/Bg weight ratios ...
Franco Matías Stábile   +1 more
doaj   +1 more source

Estudo colorimétrico de fritas feldspáticas Colorimetric study of feldsphatic frits

open access: yesCerâmica, 2010
As fritas cerâmicas são materiais de natureza vítrea preparadas por fusão em temperaturas elevadas (~1500 ºC), a partir de uma mistura de matérias-primas minerais.
S. F Santos   +3 more
doaj   +1 more source

Phlogopite and associated minerals from Permian minettes in Devon, South England [PDF]

open access: yesBulletin of the Geological Society of Finland, 1985
Electron-microprobe analyses were made of mica, clinopyroxene, alkali feldspar, Fe‒Ti oxides and apatite in Permian minettes from Hannaborough Quarry, Killerton Park and Loxbeare Farm, south Devon, England.
A.P. Jones, J.V. Smith
doaj   +1 more source

Confronting Solid‐State Shear Bias: Magmatic Fabric Contribution to Crustal Seismic Anisotropy

open access: yesGeophysical Research Letters, 2023
Seismic anisotropy is controlled by aligned rock‐forming minerals, which most studies attribute to solid‐state shear with less consideration for magmatic fabric in plutonic rocks (rigid‐body rotation of crystals in the presence of melt).
Michael G. Frothingham   +4 more
doaj   +1 more source

Low temperature synthesis of porous silicate ceramics [PDF]

open access: yesScience of Sintering, 2007
Impregnation of a polyurethane sponge with kaolin, feldspar, silica, fusible glass slurry followed by temperature treatment in air in the temperature range 800-1000 0 C leads to the formation of aluminosilicate ceramics with a set pore size.
Méndez Enríquez Y.   +6 more
doaj   +1 more source

The Influence of Magnesia Addition and Sintering Temperature on The Properties of Synthesized Electrical Porcelain [PDF]

open access: yesEngineering and Technology Journal, 2015
The influence ofmagnesia (MgO) content at different sintering temperatures on the physical and dielectric properties of synthesized electrical porcelain was investigatied.Feldspar is one of the major components of porcelain,since feldspar is not ...
Fadhil A. Chyad   +3 more
doaj   +1 more source

Geochemistry of a spheroidal weathering profile in a tropical mountainous landscape, Rio de Janeiro, Brazil

open access: yesAnais da Academia Brasileira de Ciências, 2022
Boulders are an important material in debris flow and their source is coupled with spheroidal weathering profiles that produce corestones. The goal of this work was to establish the geochemical transformations that produced corestones and distinguished ...
CARLA S. SILVEIRA   +4 more
doaj   +1 more source

FROM THE HISTORY OF OPENING AND DEVELOPMENT ORE RICHES OF THE CHERRY MOUNTAINS IN THE URALS [PDF]

open access: yesМинералогия, 2017
The main stages of exploration of mineral deposits and the contribution of many researchers to the study of geology and mineralogy of the Vishnevy Mountains in the Urals are considered.
V.I. Popova, S.N. Nikandrov
doaj  

Rapid Analysis of Feldspar by X-ray Diffractometry Rietveld Refinement Method

open access: yesYankuang ceshi, 2017
The content of minerals in feldspar can be calculated by chemical analytical results, but the analytical process is long and the calculation process is complex.
RAN Jing, DU Gu, WANG feng-yu
doaj   +1 more source

EFFECT OF BIOCHAR ON K AND P RELEASE FROM K-FELDSPAR & ROCK PHOSPHATE AND ITS IMPACT ON SOME GROWTH PARAMETER OF MAIZE PLANT [PDF]

open access: yesArab Universities Journal of Agricultural Sciences, 2019
Pot experiments were carried out using sand (collected from Ismailia ARS), in the greenhouse to study the effect of biochar application, on K and P release from their natural bearing minerals i.e.,K- feldspar and rock phosphate and\or bentonite on some ...
Manal El mahdy   +3 more
doaj   +1 more source

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