Results 251 to 260 of about 1,133,062 (322)
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Microseparation in Lead Borate Glasses
Journal of the American Ceramic Society, 1966The microstructure of a series of lead borate glasses was studied by electron microscopy and small‐angle X‐ray scattering techniques. Although the glasses were optically homogeneous, microheterogeneities of the order of 2000 to 3000 A were detected in glasses with compositions near the region of two‐liquid stability.
D. J. LIEDBERG +2 more
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Acoustic properties of borate glasses
Journal of Non-Crystalline Solids, 2004The attenuation and velocity of ultrasonic waves of frequencies in the range from 10MHz to 50MHz have been measured in (M2O)0.14(B2O3)0.86 borate glasses (M = Li, Cs or Ag) as a function of temperature between 15K and 300K. Broad relaxation peaks characterize the acoustic attenuation at temperatures below 100K and are paralleled by corresponding ...
Giovanni Carini +4 more
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Phosphate and Borate Bioactive Glasses
2022Inorganic glasses are successfully used in the biomedical field, in particular degradable glasses have found applications in tissue engineering, bone regeneration and tooth remineralisation. Silicate glasses are the most commonly used ones but phosphate and borate glasses are attracting more and more interest owing to their special properties ...
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Luminescence Of Lanthanum Borate Glasses
SPIE Proceedings, 1989The luminescence of several rare-earth ions a s2 ion and a transition metal ion in lanthanum borate glass are investigated and compared with the luminescence of these ions in crystals of composition LaB3O6,with a special stress on the transitions of the broad-band type.
J. W. M. Verwey, G. Blasse
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1978
Early in 1975, Norbert Kreidl approached me for my opinion on the topic and novel format which he was considering for the Fifth “Rolla” Ceramic Materials Conference.* The theme was to be borate glass structures, and part of the motivation was to produce a volume of original papers on the subject which could be dedicated as a “festschrift” in memory of ...
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Early in 1975, Norbert Kreidl approached me for my opinion on the topic and novel format which he was considering for the Fifth “Rolla” Ceramic Materials Conference.* The theme was to be borate glass structures, and part of the motivation was to produce a volume of original papers on the subject which could be dedicated as a “festschrift” in memory of ...
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Kinetic study of crystallization of borates and borate glasses
Journal of Alloys and Compounds, 1996Abstract The kinetics of the multistage crystallization of amorphous borates and alkali- and alkaline-earth-borate glasses obtained by melting oxide mixtures has been studied. The amorphized borates: colemanite Ca 2 B 6 O 8 (OH) 6 ·2H 2 O, pandermite Ca 2 B 5 O 8 (OH) 3 ·2H 2 O, kaliborite HKMg 2 B 12 O 16 (OH) 10 ·4H 2 O, kernite Na 2 B 4 O 6 (OH ...
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1978
One of the first factory produced boro-silicate glasses was made by Maes in Clichy, France around 1850. It was a glass one would call today a “boro-silicate crown” and its composition, according to an analysis reported by E. Zschimmer [1], was 56% silica, 7% boric acid, 17% potassia, 2% calcia, 14% zinc oxide, 4% lead oxide. Articles made of this glass
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One of the first factory produced boro-silicate glasses was made by Maes in Clichy, France around 1850. It was a glass one would call today a “boro-silicate crown” and its composition, according to an analysis reported by E. Zschimmer [1], was 56% silica, 7% boric acid, 17% potassia, 2% calcia, 14% zinc oxide, 4% lead oxide. Articles made of this glass
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Mechanical property optimization of a zinc borate glass by lanthanum doping
Journal of Non-Crystalline Solids, 2019All known oxide glasses are inherently brittle, but their resistance to damage such as hardness and crack resistance varies strongly as a function of the chemical composition.
Kacper Januchta +3 more
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New design of sapphire joints brazed with bismuth-borate glass
Ceramics International, 2019Bismuth-borate glass, 50Bi2O3–50B2O3 (mol%), was prepared and employed to braze sapphire in air. Prior to the joining process, the structure and mechanical and thermal parameters of the glass were investigated.
Wei Guo +6 more
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Glass Formation in Borate Systems
1978Glass formation achieved by quenching a melt is a fundamental material property associated with a number of independent variables: composition, melt volume, type of quench, quench temperature and melt history1. Collectively, these variables combine to yield a quench rate which may or may not be sufficient for a given melt to suppress crystallization ...
L. D. Pye, V. D. Fréchette, D. E. Rase
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