scholarly journals Characterization of the Flux System: Lithium-Aluminum Silicate (Li)–Alkali Feldspars (Na,K); Magnesium (Mg) and Calcium (Ca)–Silicates

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7386
Author(s):  
Agata Stempkowska
Keyword(s):  
Melting Temperature ◽  
Thermal Parameters ◽  
Aluminum Silicate ◽  
Lithium Aluminum ◽  
Technological Properties ◽  
Mineral Industry ◽  
Natural Mineral ◽  
Flux System ◽  
Alkali Feldspars

In this paper, the system of natural mineral alkali fluxes used in typical mineral industry technologies was analyzed. The main objective was to lower the melting temperature of the flux systems. The research has shown that the best melting parameters in the Ca–Mg– (Li,Na,K) system were characterized by the composition: A-eutectic 20% and wollastonite 80%, and it was reached at temperature 1140 °C; in addition, this set had the widest melting interval. Selected thermal parameters of mineral flux systems were also calculated. The technological properties of mineral composites such as shrinkage and brightness were also analyzed.

The influence of heat treatment on the fiber/matrix interface in a SiC-reinforced glassceramic

1988 ◽  
Vol 46 ◽  
pp. 742-743
Author(s):  
E. Bischoff ◽  
O. Sbaizero
Keyword(s):  
Heat Treatment ◽  
Aluminum Silicate ◽  
Lithium Aluminum ◽  
Interfacial Region ◽  
Specimen Preparation ◽  
Crack Wake ◽  
Pull Out ◽  
Annealed Material ◽  
Ultrasonic Drilling ◽  
Fiber Matrix Interface

Fiber or whisker reinforced ceramics show improved toughness and strength. Bridging by intact fibers in the crack wake and fiber pull-out after failure contribute to the additional toughness. These processes are strongly influenced by the sliding and debonding resistance of the interfacial region. The present study examines the interface in a laminated 0/90 composite consisting of SiC (Nicalon) fibers in a lithium-aluminum-silicate (LAS) glass-ceramic matrix. The material shows systematic changes in sliding resistance upon heat treatment.As-processed samples were annealed in air at 800 °C for 2, 4, 8, 16 and 100 h, and for comparison, in helium at 800 °C for 4 h. TEM specimen preparation of as processed and annealed material was performed with special care by cutting along directions having the fibers normal and parallel to the section plane, ultrasonic drilling, dimpling to 100 pm and final ionthinning. The specimen were lightly coated with Carbon and examined in an analytical TEM operated at 200 kV.

The Dynamics for Aqueous Sodium Adsorption and Characterization of Natural Pyrophyllite

2011 ◽  
Vol 117-119 ◽  
pp. 1129-1132
Author(s):  
Bo Liu ◽  
Hai Feng Chen ◽  
Pei Song Tang
Keyword(s):  
Qualitative Analysis ◽  
Internal Structure ◽  
Electron Micrographs ◽  
Scanning Electron Micrographs ◽  
Adsorption Dynamics ◽  
Natural Mineral ◽  
Aqueous Sodium ◽  
Materials Used ◽  
Scanning Electron

In this experiment, pyrophyllite as the main materials used the flame photometer to measure adsorption. Using the qualitative analysis of the samples of XRD with internal structure and found that pyrophyllite used in the experiment as a natural mineral, the presence with other minerals. Meanwhile, scanning electron micrographs (SEM) from the display showed that the effect of pyrophyllite adsorption for cations should be more significant. Therefore, this experiment focused on the time, Na+ concentration, on the pyrophyllite and different pyrophyllite concentrations (adsorbent dosage) effect on the adsorption, in addition to the adsorption dynamics. The results showed that pyrophyllite adsorption sodium in the best time of equilibrium was 20 minutes, the concentration of NaCl was 50 mg/L, pH = 7, temperature was 313 K, the concentration of pyrophyllite was 5 mg/L.

Characterization of Spanish powdered seaweeds: Composition, antioxidant capacity and technological properties

2018 ◽  
Vol 111 ◽  
pp. 212-219 ◽  
Author(s):  
Isabel Fernández-Segovia ◽  
María Jesús Lerma-García ◽  
Ana Fuentes ◽  
Jose M. Barat
Keyword(s):  
Antioxidant Capacity ◽  
Technological Properties

INFLUENCE BAROHYDROTHERMAL PROCESSING ON TECHNOLOGICAL PROPERTIES AND BIOLOGICAL VALUE OF GRAIN EINKORN

2018 ◽  
Author(s):  
В.В. СИРОТКИНА ◽  
А.С. ПРОКОПЕЦ ◽  
И.В. СУРУХАНОВА ◽  
Н.В. ИЛЬЧИШИНА
Keyword(s):  
Biochemical Characterization ◽  
Tetrahymena Pyriformis ◽  
Positive Influence ◽  
Comparative Assessment ◽  
Excess Pressure ◽  
Technological Properties ◽  
Biological Value ◽  
Qualitative And Quantitative ◽  
Different Parts

Дана биохимическая характеристика образцов зерна полбы кубанской селекции. Приведены результаты исследования биологической ценности этих образцов с использованием инфузории Tetrahymena pyriformis. Определены качественный и количественный составы поверхностной микрофлоры различных частей зерновки. Проведена барогидротермическая обработка (БГТО) зерна, и определено ее влияние на технологические и биологические свойства зерна полбы. Предложены и апробированы режимы БГТО образцов зерна полбы, увлажненного до 20, 25 и 30%, с отволаживанием зерна в течение 40 мин и последующим автоклавированием при избыточном давлении 0,1 МПа в течение 3, 5 и 10 мин. Установлено, что БГТО позволяет дезактивировать поверхностную микрофлору зерна полбы. Выявлено положительное влияние БГТО на увеличение биологической ценности зерна. Сравнительная оценка кулинарных свойств нативных зерен полбы и зерен полбы после БГТО показала сокращение времени варки крупы на 20 мин – с 60 до 40 мин. Biochemical characterization of grains einkorn Kuban breeding was given. The results of the study of the biological value of these samples with using Tetrahymena pyriformis are given. The qualitative and quantitative compositions of the surface microflora of different parts of the grain are determined. Barohydrothermal processing (BHTP) of grain is carried out, and its influence on technological and, biological of grain einkorn is defined. Regimes of BHTP samples of the grain einkorn moistened to 20, 25 and 30%, with the braving of the grain for 40 min and subsequent autoclaving at an excess pressure of 0,1 MPa within 3, 5 and 10 min are proposed and tested. It is established that BHTP allows to deactivate the surface microflora of the grain einkorn. Positive influence BHTP for increase the biological value of grain einkorn is revealed. A comparative assessment of the culinary properties of native grains einkorn and grains einkorn after BHTP showed a reduction in the time of cooking cereals by 20 min (from 60 to 40 min).

Synthesis and Characterization of Calcium Zeolite-Cowlesite.

2021 ◽  
Vol 23 (05) ◽  
pp. 787-790
Author(s):  
Abhijit M ◽  
◽  
Suresh Kumar. B. V ◽  
Keyword(s):  
Low Temperature ◽  
Elemental Concentration ◽  
Stoichiometric Composition ◽  
Lattice Parameter ◽  
Raw Material ◽  
Synthesis And Characterization ◽  
Aluminum Silicate ◽  
Hydrothermal Conditions ◽  
Orthorhombic System

Cowlesite is a Calcium Aluminum silicate CaAl2Si3O106H2O which formed under the hydrothermal conditions of low temperature (1800C) and pressure (1.013250bar). Cowlesite minerals are known for their peculiar occurrence. Synthesis of Cowlesite mineral was carried by suitable stoichiometric composition. Hydrothermal synthesized Cowlesite mineral was characterized by XRD, SEM, and EDAX. It crystallized in the orthorhombic system and a lattice parameter a=23.22Å, b=30.58Å, c=25.01Å, Volume of Unit cell=17758.79Å3, α=β=γ=900. EDAX results show the elemental concentration of raw material which was used.

Characterization of chitosan–magnesium aluminum silicate nanocomposite films for buccal delivery of nicotine

2013 ◽  
Vol 55 ◽  
pp. 24-31 ◽  
Author(s):  
Thaned Pongjanyakul ◽  
Wanwisa Khunawattanakul ◽  
Clare J. Strachan ◽  
Keith C. Gordon ◽  
Satit Puttipipatkhachorn ◽  
...  
Keyword(s):  
Nanocomposite Films ◽  
Aluminum Silicate ◽  
Buccal Delivery ◽  
Magnesium Aluminum Silicate
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