Sintering behavior and microwave dielectric properties of tricalcium phosphate polymorphs

In Sun Cho; Hyun Seung Ryu; Jeong Ryeol Kim; Dong Wan Kim; Kug Sun Hong

doi:10.1143/JJAP.46.2999

Sintering behavior and microwave dielectric properties of tricalcium phosphate polymorphs

In Sun Cho, Hyun Seung Ryu, Jeong Ryeol Kim, Dong Wan Kim, Kug Sun Hong

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

24 Citations (Scopus)

Abstract

The phase transformation and sintering behavior of tricalcium phosphate polymorphs [β- and α-Ca₃(PO₄)₂] are investigated using differential thermal analysis, X-ray powder diffraction, and dilatometry. The low-temperature phase, β-Ca₃(PO ₄)₂, can be sintered at 1125°C prior to phase transformation to α-Ca₃(PO₄)₂. However, it is difficult to obtain dense α-Ca₃(PO₄) ₂ samples owing to volume expansion and subsequent microcrack formation during the transformation of β-Ca₃(PO ₄)₂ to α-Ca₃(PO₄)₂. Herein, we develop α-Ca₃(PO₄)₂ with a density higher than 97% by microwave heating α-Ca₃(PO ₄)₂ without any reversible phase transformation. Also, we initially explore the microwave dielectric properties of tricalcium phosphate. Both tricalcium phosphate polymorphs show dielectric constants lower than 10. Of importance is the fact that a dense α-Ca₃(PO₄) ₂ sample has a high quality factor of 22,000 GHz.

Original language	English
Pages (from-to)	2999-3003
Number of pages	5
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	46
Issue number	5 A
DOIs	https://doi.org/10.1143/JJAP.46.2999
Publication status	Published - 2007 May 8
Externally published	Yes

Keywords

Ca(PO)
Dielectric properties
Microwave
Phase transformation
Sintering

ASJC Scopus subject areas

General Engineering
General Physics and Astronomy

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10.1143/JJAP.46.2999

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title = "Sintering behavior and microwave dielectric properties of tricalcium phosphate polymorphs",

abstract = "The phase transformation and sintering behavior of tricalcium phosphate polymorphs [β- and α-Ca3(PO4)2] are investigated using differential thermal analysis, X-ray powder diffraction, and dilatometry. The low-temperature phase, β-Ca3(PO 4)2, can be sintered at 1125°C prior to phase transformation to α-Ca3(PO4)2. However, it is difficult to obtain dense α-Ca3(PO4) 2 samples owing to volume expansion and subsequent microcrack formation during the transformation of β-Ca3(PO 4)2 to α-Ca3(PO4)2. Herein, we develop α-Ca3(PO4)2 with a density higher than 97% by microwave heating α-Ca3(PO 4)2 without any reversible phase transformation. Also, we initially explore the microwave dielectric properties of tricalcium phosphate. Both tricalcium phosphate polymorphs show dielectric constants lower than 10. Of importance is the fact that a dense α-Ca3(PO4) 2 sample has a high quality factor of 22,000 GHz.",

keywords = "Ca(PO), Dielectric properties, Microwave, Phase transformation, Sintering",

author = "Cho, {In Sun} and Ryu, {Hyun Seung} and Kim, {Jeong Ryeol} and Kim, {Dong Wan} and Hong, {Kug Sun}",

year = "2007",

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doi = "10.1143/JJAP.46.2999",

language = "English",

volume = "46",

pages = "2999--3003",

journal = "Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers",

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T1 - Sintering behavior and microwave dielectric properties of tricalcium phosphate polymorphs

AU - Cho, In Sun

AU - Ryu, Hyun Seung

AU - Kim, Jeong Ryeol

AU - Kim, Dong Wan

AU - Hong, Kug Sun

PY - 2007/5/8

Y1 - 2007/5/8

N2 - The phase transformation and sintering behavior of tricalcium phosphate polymorphs [β- and α-Ca3(PO4)2] are investigated using differential thermal analysis, X-ray powder diffraction, and dilatometry. The low-temperature phase, β-Ca3(PO 4)2, can be sintered at 1125°C prior to phase transformation to α-Ca3(PO4)2. However, it is difficult to obtain dense α-Ca3(PO4) 2 samples owing to volume expansion and subsequent microcrack formation during the transformation of β-Ca3(PO 4)2 to α-Ca3(PO4)2. Herein, we develop α-Ca3(PO4)2 with a density higher than 97% by microwave heating α-Ca3(PO 4)2 without any reversible phase transformation. Also, we initially explore the microwave dielectric properties of tricalcium phosphate. Both tricalcium phosphate polymorphs show dielectric constants lower than 10. Of importance is the fact that a dense α-Ca3(PO4) 2 sample has a high quality factor of 22,000 GHz.

AB - The phase transformation and sintering behavior of tricalcium phosphate polymorphs [β- and α-Ca3(PO4)2] are investigated using differential thermal analysis, X-ray powder diffraction, and dilatometry. The low-temperature phase, β-Ca3(PO 4)2, can be sintered at 1125°C prior to phase transformation to α-Ca3(PO4)2. However, it is difficult to obtain dense α-Ca3(PO4) 2 samples owing to volume expansion and subsequent microcrack formation during the transformation of β-Ca3(PO 4)2 to α-Ca3(PO4)2. Herein, we develop α-Ca3(PO4)2 with a density higher than 97% by microwave heating α-Ca3(PO 4)2 without any reversible phase transformation. Also, we initially explore the microwave dielectric properties of tricalcium phosphate. Both tricalcium phosphate polymorphs show dielectric constants lower than 10. Of importance is the fact that a dense α-Ca3(PO4) 2 sample has a high quality factor of 22,000 GHz.

KW - Ca(PO)

KW - Dielectric properties

KW - Microwave

KW - Phase transformation

KW - Sintering

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DO - 10.1143/JJAP.46.2999

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JO - Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers

JF - Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers

IS - 5 A

ER -

Sintering behavior and microwave dielectric properties of tricalcium phosphate polymorphs

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Keywords

ASJC Scopus subject areas

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