Crystallization of CaTi4(PO4)6 from calcium-titanium borophosphate glasses

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F05%3A00002953" target="_blank" >RIV/00216275:25310/05:00002953 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Crystallization of CaTi4(PO4)6 from calcium-titanium borophosphate glasses

Original language description

Preparation of the CaTi4(PO4)6-type glass-ceramic materials by controlled crystallization of calcium-titanium borophosphate glasses was studied in the compositional series of 50CaO-10B2O3-40P2O5+xTiO2 (x=0-56 mol% TiO2) and 30CaO-30B2O3-40P2O5+xTiO2 (x=0-24mol% TiO2). The glasses crystallize under heating within the temperature region of 700-800°C and the surface nucleation mechanism prevails in all the TiO2-doped glasses over the internal one. The major compounds formed by crystallization were CaTi4(PO4)6, Ca2P2O7 and BPO4. Changes in the XRD patterns after leaching with 1M HCl or 1M HNO3 showed that the acids dissolve most of all the other crystalline phases than CaTi4(PO4)6. In this way a porous skeleton with CaTi4(PO4)6 phase is formed the specificsurface area of which decreases with increasing TiO2 content in the starting glasses.

Czech name

Krystalizace CaTi4(PO4)6 z vápenato-titaničitých borofosfátových skel

Czech description

Byla ověřována možnost přípravy sklo-keramiky na bázi CaTi4(PO4)3 kontrolovanou krystalizací vápenáto-titaničitých borofosforečnanových skel v kompozičních řadách 50CaO-10B2O3-40P2O5+xTiO2 (x = 0-56mol.% TiO2) a 30CaO-30B2O3-40P2O5+xTiO2 (x = 0-24 mol.%TiO2) a možnost separace CaTi4(PO4)3 loužením zkrystalovaných vzorků skel v kyselinách.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JH - Ceramics, fire-proof materials and glass

OECD FORD branch

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Project

<a href="/en/project/GA104%2F04%2F0711" target="_blank" >GA104/04/0711: Borophosphate and phosphate glasses and glass-ceramics with special theromechanical properties</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2005

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Phosphorous Research Bulletin

ISSN

0918-4783

e-ISSN

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Volume of the periodical

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Issue of the periodical within the volume

19

Country of publishing house

JP - JAPAN

Number of pages

6

Pages from-to

178-183

UT code for WoS article

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EID of the result in the Scopus database

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