Crystallization and dielectric properties of low temperature dielectrics containing Li2O filler

Lim, Won Bae; Saji, Viswanathan S.; Cho, Yong Soo; Shul, Yong Gun; Lim, Sangwoo; Jang, Jae Hyuk; Lee, Hong Ryul

doi:10.1016/j.jnoncrysol.2008.05.014

Cited by 5 publications

(11 citation statements)

References 18 publications

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“…Fig 1 shows the selected XRD patterns of the 50 wt% AlN, BN and Si 3 N4-containing samples with changing firing temperature. 6,10 In the case of BN, no other crystalline phase was observed even at high temperatures, indicating that BN may suppress the formation of anorthite phase. Only the samples containing AlN filler seemed to crystallize into the expected CaAl 2 Si 2 O 8 (anorthite) phase (Fig.…”

Section: Resultsmentioning

confidence: 99%

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Densification, Crystallization, and Dielectric Properties of AlN,BN, and Si₃N₄ Filler‐Containing LTCC Materials

Hong

Choi

Jung

et al. 2012

Int J Applied Ceramic Tech

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Glass composite dielectrics consisting of calcium aluminoborosilicate glass and nitride fillers such as aluminum nitride, boron nitride, and silicon nitride (AlN, BN, and Si3N4) were investigated. Densification and crystallization behavior depended on the type of filler, filler content, and firing temperature. AlN was most promising in generating desirable densification and dielectric properties (k of ~7.2 and tanδ of ~0.003) at 850°C with progressive crystallization of common anorthite phase. BN tended to show no significant densification and suppression of crystallization. Si3N4 resulted in abnormal behavior of densification, which can be highlighted with certain expansion at higher temperatures, as well as unexpected crystallization of CaSiO3 and CaAl2SiO6.

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Section: Resultsmentioning

confidence: 99%

“…[6][7][8] These oxide filler materials have been sometimes selected for the specific purpose of improving certain performances of the LTCC materials. [6][7][8] These oxide filler materials have been sometimes selected for the specific purpose of improving certain performances of the LTCC materials.…”

Section: Introductionmentioning

confidence: 99%

Densification, Crystallization, and Dielectric Properties of AlN,BN, and Si₃N₄ Filler‐Containing LTCC Materials

Hong

Choi

Jung

et al. 2012

Int J Applied Ceramic Tech

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“…The higher temperature of 900°C clearly demonstrates the formation of the crystalline anorthite (CaAl 2 Si 2 O 8 ) phase along with the CCTO phase. The anorthite phase is known to crystallize typically from the calcium aluminoborosilicate glass itself above 850°C as reported in LTCC studies 10,13,14 . The intensity of the anorthite peaks increased with the increasing glass content as shown in the XRD patterns of Fig.…”

Section: Resultsmentioning

confidence: 54%

“…Glass needs to sufficiently wet the surface of the filler particles and to form a network channel upon firing above its softening point 18 . Typical compositional range of glass needed for the LTCC application is 30–60%, relative to the filler content 10,13–17 …”

Section: Resultsmentioning

confidence: 99%

Calcium Aluminoborosilicate‐Based Dielectrics Containing CaCu₃Ti₄O₁₂ as a Filler

Kim

Lee

Key

et al. 2010

Journal of the American Ceramic Society

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High dielectric constant (k) CaCu3Ti4O12 (CCTO) has been studied as a potential filler for low‐temperature cofired ceramics (LTCC) based on typical calcium aluminoborosilicate glass. CCTO does not appear to be chemically reactive with the glass regardless of the firing temperature over the compositional range of 30–90 wt% CCTO. Dielectric constant and dielectric loss turned out to depend strongly on the relative content of CCTO and firing temperature. As an optimal composition, the glass with 60 wt% CCTO exhibited a k∼32 and tan δ∼0.01 as a result of firing at 850°C, which is preferably applicable for the medium k LTCC applications. The higher content of 90 wt% CCTO needed to be densified at 900°C for better densification with a higher dielectric constant of ∼150. However, the 900°C firing was not acceptable for the 30 and 60 wt% CCTO‐containing samples due to the unexpected expansion of samples leading to significantly enlarged pores.

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“…Second, glass redistribution and local grain rearrangement are mainly achieved by capillary force. The driving force for this process was the capillary force of a glass-filled cylindrical pore channel [12] . The densifi cation occurs in this stage only.…”

Section: Mechanismmentioning

confidence: 99%

Preparation and properties of crystallizable Glass/Al2O3 composites for LTCC material

Shao

Zhou

Zhu

et al. 2011

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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The investigated low temperature Co fi red ceramics(LTCC) composite of 60wt% CaO-Al 2 O 3 -B 2 O 3 -SiO 2 glass and 40wt% α-Al 2 O 3 as a filler is a non-reactive system, which is a critical part of the low temperature Co fi red ceramics process. Through a study on densifi cation process, the phase transformation and microstructure can be revealed. Its composites typically consist of CaO-Al 2 O 3 -B 2 O 3 -SiO 2 glass and α-Al 2 O 3 powders of average particle size (D 50 =3.49 m). The sintering behavior, phase evaluation, sintered morphology, and microwave dielectric properties were investigated. In the fire range of 800 to 900 ℃, the composites were crystallized after completion of densifi cation. It is found that the composites start to densify at 825 ℃, simultaneously, the dielectric constant (ε r ) reaches its maximum. With increasing heat-treatment temperatures, due to the loose microstructure of the material, tanδ increases slightly. The last of the sintered samples were identifi ed as partly Anorthite at 850 ℃. At that temperature it has ε r of 7.9 and tanδ less than 1×10 3 , and can be used as a promising LTCC material.

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Crystallization and dielectric properties of low temperature dielectrics containing Li2O filler

Cited by 5 publications

References 18 publications

Densification, Crystallization, and Dielectric Properties of AlN,BN, and Si₃N₄ Filler‐Containing LTCC Materials

Densification, Crystallization, and Dielectric Properties of AlN,BN, and Si₃N₄ Filler‐Containing LTCC Materials

Calcium Aluminoborosilicate‐Based Dielectrics Containing CaCu₃Ti₄O₁₂ as a Filler

Preparation and properties of crystallizable Glass/Al2O3 composites for LTCC material

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Crystallization and dielectric properties of low temperature dielectrics containing Li2O filler

Cited by 5 publications

References 18 publications

Densification, Crystallization, and Dielectric Properties of AlN,BN, and Si3N4 Filler‐Containing LTCC Materials

Densification, Crystallization, and Dielectric Properties of AlN,BN, and Si3N4 Filler‐Containing LTCC Materials

Calcium Aluminoborosilicate‐Based Dielectrics Containing CaCu3Ti4O12 as a Filler

Preparation and properties of crystallizable Glass/Al2O3 composites for LTCC material

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Densification, Crystallization, and Dielectric Properties of AlN,BN, and Si₃N₄ Filler‐Containing LTCC Materials

Densification, Crystallization, and Dielectric Properties of AlN,BN, and Si₃N₄ Filler‐Containing LTCC Materials

Calcium Aluminoborosilicate‐Based Dielectrics Containing CaCu₃Ti₄O₁₂ as a Filler