Effects of P2O5 and sintering temperature on microstructure and mechanical properties of lithium disilicate glass-ceramics

G. Wen; X. Zheng; L. Song

doi:10.1016/j.actamat.2007.02.009

Effects of P₂O₅ and sintering temperature on microstructure and mechanical properties of lithium disilicate glass-ceramics

G. Wen^*
, X. Zheng
, L. Song

^*Corresponding author for this work

Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

145 Scopus citations

Abstract

This paper investigates the effect of P₂O₅ content and sintering temperature on the microstructure of lithium disilicate glass-ceramics and analyzes the relation between microstructure and mechanical properties. Specimens were prepared by hot-pressing technology, adding 1.0-4.0 mol% P₂O₅ (G1P, G2P, G3P and G4P). Lithium disilicate (Li₂Si₂O₅), lithium metasilicate (Li₂SiO₃) and lithium orthophosphate (Li₃PO₄) crystalline phases were detected. The morphology of Li₂Si₂O₅ crystals transformed from rod-shaped to needle-like and the mechanical properties inevitably decreased. Additionally, G1P and G2P were prepared by hot-pressing technology with sintering temperatures ranging 780-840 °C. The results showed that sintering temperature had no significant effect on the crystalline phases and microstructure. The optimal mechanical performances (flexural strength 290 MPa; fracture toughness 3.3 MPa m^1/2) were obtained with 1 mol% P₂O₅ and a sintering temperature of 820 °C.

Original language	English
Pages (from-to)	3583-3591
Number of pages	9
Journal	Acta Materialia
Volume	55
Issue number	10
DOIs	https://doi.org/10.1016/j.actamat.2007.02.009
State	Published - Jun 2007
Externally published	Yes

Keywords

Hot pressing
Lithium disilicate
Mechanical properties
Microstructure

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10.1016/j.actamat.2007.02.009

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@article{7162b12ba12540dc92d99bcc3bf37e1e,

title = "Effects of P2O5 and sintering temperature on microstructure and mechanical properties of lithium disilicate glass-ceramics",

abstract = "This paper investigates the effect of P2O5 content and sintering temperature on the microstructure of lithium disilicate glass-ceramics and analyzes the relation between microstructure and mechanical properties. Specimens were prepared by hot-pressing technology, adding 1.0-4.0 mol\% P2O5 (G1P, G2P, G3P and G4P). Lithium disilicate (Li2Si2O5), lithium metasilicate (Li2SiO3) and lithium orthophosphate (Li3PO4) crystalline phases were detected. The morphology of Li2Si2O5 crystals transformed from rod-shaped to needle-like and the mechanical properties inevitably decreased. Additionally, G1P and G2P were prepared by hot-pressing technology with sintering temperatures ranging 780-840 °C. The results showed that sintering temperature had no significant effect on the crystalline phases and microstructure. The optimal mechanical performances (flexural strength 290 MPa; fracture toughness 3.3 MPa m1/2) were obtained with 1 mol\% P2O5 and a sintering temperature of 820 °C.",

keywords = "Hot pressing, Lithium disilicate, Mechanical properties, Microstructure",

author = "G. Wen and X. Zheng and L. Song",

year = "2007",

month = jun,

doi = "10.1016/j.actamat.2007.02.009",

language = "英语",

volume = "55",

pages = "3583--3591",

journal = "Acta Materialia",

issn = "1359-6454",

publisher = "Acta Materialia Inc",

number = "10",

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TY - JOUR

T1 - Effects of P2O5 and sintering temperature on microstructure and mechanical properties of lithium disilicate glass-ceramics

AU - Wen, G.

AU - Zheng, X.

AU - Song, L.

PY - 2007/6

Y1 - 2007/6

N2 - This paper investigates the effect of P2O5 content and sintering temperature on the microstructure of lithium disilicate glass-ceramics and analyzes the relation between microstructure and mechanical properties. Specimens were prepared by hot-pressing technology, adding 1.0-4.0 mol% P2O5 (G1P, G2P, G3P and G4P). Lithium disilicate (Li2Si2O5), lithium metasilicate (Li2SiO3) and lithium orthophosphate (Li3PO4) crystalline phases were detected. The morphology of Li2Si2O5 crystals transformed from rod-shaped to needle-like and the mechanical properties inevitably decreased. Additionally, G1P and G2P were prepared by hot-pressing technology with sintering temperatures ranging 780-840 °C. The results showed that sintering temperature had no significant effect on the crystalline phases and microstructure. The optimal mechanical performances (flexural strength 290 MPa; fracture toughness 3.3 MPa m1/2) were obtained with 1 mol% P2O5 and a sintering temperature of 820 °C.

AB - This paper investigates the effect of P2O5 content and sintering temperature on the microstructure of lithium disilicate glass-ceramics and analyzes the relation between microstructure and mechanical properties. Specimens were prepared by hot-pressing technology, adding 1.0-4.0 mol% P2O5 (G1P, G2P, G3P and G4P). Lithium disilicate (Li2Si2O5), lithium metasilicate (Li2SiO3) and lithium orthophosphate (Li3PO4) crystalline phases were detected. The morphology of Li2Si2O5 crystals transformed from rod-shaped to needle-like and the mechanical properties inevitably decreased. Additionally, G1P and G2P were prepared by hot-pressing technology with sintering temperatures ranging 780-840 °C. The results showed that sintering temperature had no significant effect on the crystalline phases and microstructure. The optimal mechanical performances (flexural strength 290 MPa; fracture toughness 3.3 MPa m1/2) were obtained with 1 mol% P2O5 and a sintering temperature of 820 °C.

KW - Hot pressing

KW - Lithium disilicate

KW - Mechanical properties

KW - Microstructure

UR - https://www.scopus.com/pages/publications/34247598848

U2 - 10.1016/j.actamat.2007.02.009

DO - 10.1016/j.actamat.2007.02.009

M3 - 文章

AN - SCOPUS:34247598848

SN - 1359-6454

VL - 55

SP - 3583

EP - 3591

JO - Acta Materialia

JF - Acta Materialia

IS - 10

ER -

Effects of P₂O₅ and sintering temperature on microstructure and mechanical properties of lithium disilicate glass-ceramics

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Keywords

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