Effect of heat treatment on the electronic properties of calcium borate glasses containing iron oxide

1977 ◽  
Vol 43 (1) ◽  
pp. 99-102 ◽  
Author(s):  
N. Saleh ◽  
M. Gawish
Keyword(s):  
Heat Treatment ◽  
Iron Oxide ◽  
Electronic Properties ◽  
Borate Glasses ◽  
Calcium Borate

Conduction models of semiconducting calcium borate glasses containing iron oxide

1980 ◽  
Vol 51 (1) ◽  
pp. 459-465 ◽  
Author(s):  
M. N. Saleh ◽  
M. M. Gawish
Keyword(s):  
Iron Oxide ◽  
Borate Glasses ◽  
Calcium Borate

Optical and structural studies of some zinc calcium borate glasses for optoelectronic device applications

2021 ◽  
Vol 32 (7) ◽  
pp. 9392-9399
Author(s):  
Hosam M. Gomaa ◽  
I. S. Yahia ◽  
B. M. A. Makram ◽  
Ahmed H. El-Dosokey ◽  
Saeid M. Elkatlawy
Keyword(s):  
Optoelectronic Device ◽  
Borate Glasses ◽  
Structural Studies ◽  
Calcium Borate ◽  
Device Applications

scholarly journals Bone bonding ability of some borate bio-glasses and their corresponding glass-ceramic derivatives

2012 ◽  
Vol 6 (4) ◽  
pp. 183-192 ◽  
Author(s):  
Fatma Margha ◽  
Amr Abdelghany
Keyword(s):  
Heat Treatment ◽  
Fourier Transform ◽  
Glass Ceramic ◽  
Glass Composition ◽  
Glass Ceramics ◽  
Soda Lime ◽  
Phosphate Solution ◽  
Borate Glasses ◽  
X Ray Diffraction ◽  
X Ray

Ternary borate glasses from the system Na2O?CaO?B2O3 together with soda-lime-borate samples containing 5 wt.% of MgO, Al2O3, SiO2 or P2O5 were prepared. The obtained glasses were converted to their glass-ceramic derivatives by controlled heat treatment. X-ray diffraction was employed to investigate the separated crys?talline phases in glass-ceramics after heat treatment of the glassy samples. The glasses and corresponding glass-ceramics after immersion in water or diluted phosphate solution for extended times were characterized by the grain method (adopted by several authors and recommended by ASTM) and Fourier-transform infrared spectra to justify the formation of hydroxyapatite as an indication of the bone bonding ability. The influence of glass composition on bioactivity potential was discussed too.

Influence of heat treatment of iron oxide on its effectiveness as anticorrosion pigment in epoxy based coatings

2020 ◽  
Vol 139 ◽  
pp. 105458 ◽  
Author(s):  
Yazid Touazi ◽  
Abderrezak Abdi ◽  
Anissa Leshaf ◽  
Kamel Khimeche
Keyword(s):  
Heat Treatment ◽  
Iron Oxide ◽  
Anticorrosion Pigment

The Effect of Heat Treatment on the Optical Properties of Copper-Containing Lithium-Potassium-Borate Glasses

2018 ◽  
Vol 57 (1) ◽  
pp. 116-120
Author(s):  
P.S. Shirshnev ◽  
V.L. Ugolkov ◽  
Zh.G. Snezhnaia ◽  
D.I. Panov ◽  
E.V. Shirshneva-Vaschenko ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Optical Properties ◽  
Raman Scattering ◽  
Copper Ions ◽  
Xrd Analysis ◽  
Luminescence Spectra ◽  
Borate Glasses ◽  
Potassium Borate ◽  
Narrow Bands

Abstract The paper presents the investigation of lithium-potassium-alumoborate glasses (0- 25 mol.% Li2O) doped by copper ions. The effect of glass annealing on the Raman scattering patterns is discussed. It is shown that such an annealing results in drastic changes in the Raman scattering patterns for the glass with 10 mol.%of Li2O: the band at 481 cm-1 conventionally attributed to boron-oxygen bonds in metaborate rings disappears, while a set of narrow bands at 1236, 1500, and 1783 cm-1 is observed. We consider one of these bands, 1783 cm-1, as being the identifier of the formed Li(Al7B4O17) nanophase, XRD analysis supported the above suggestion. The effect of newly formed nanophase on the luminescence spectra is discussed.

Structural, luminescence and NMR studies on Nd3+-doped sodium–calcium-borate glasses for lasing applications

2020 ◽  
Vol 46 (17) ◽  
pp. 27099-27109
Author(s):  
Jaimson T. James ◽  
Jephin K. Jose ◽  
M. Manjunatha ◽  
Keenatampalle Suresh ◽  
A. Madhu
Keyword(s):  
Borate Glasses ◽  
Calcium Borate ◽  
Nmr Studies ◽  
Sodium Calcium

Effect of Heat Treatment Condition on the Characteristics of MnO2 Added-Fe2TiO5 Ceramics for NTC Thermistors Using Local Iron Oxide

2018 ◽  
Vol 917 ◽  
pp. 64-68
Author(s):  
Wiendartun ◽  
Jaenudin Kamal ◽  
Dadi Rusdiana ◽  
Andhy Setiawan ◽  
Dani Gustaman Syarief
Keyword(s):  
Heat Treatment ◽  
Iron Oxide ◽  
Treatment Condition ◽  
Treatment Time ◽  
Heat Treatment Condition ◽  
Heat Treatment Time ◽  
Second Phase ◽  
Room Temperature Resistivity ◽  
Electrical Characteristics ◽  
Ntc Thermistor

A study on the effect of heat treatment condition on the characteristics of MnO2 added-Fe2TiO5 ceramics for NTC thermistor has been carried out. The ceramics were produced by pressing an homogenous mixture of Fe2O3 (local/ yarosite), TiO2 and MnO2 (2.0 mole %) powders in appropriate proportions to produce Fe2TiO5 based ceramics and sintering the pressed powder at 1050 °C for 3 hours in oxygen gas. Some sintered pellets were heat treated by heating them at 300 °C for 5, 15 and 25 minutes in Ar + 7% H2 gas. The XRD analyses showed that the Fe2TiO5 ceramics with and without heat treatment time had orthorhombic structure. No peak from second phase was observed from the XRD profiles. From the electrical characteristics data, it was known that the heat treatment could change the electrical characteristics of the Fe2TiO5 based-thermistor. The thermistor constant (B) and room temperature resistivity (ρRT) decreased with the increasing of heat treatment time. All ceramics made had thermistor characteristics namely B = 3459-7596 K and ρRT = 1.056-6936.062 MΩcm. Thermistor constant of the ceramics was relatively big, indicated that ceramics made from local iron oxide in this work fit the market requirement for NTC thermistor.

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