Influence of Glass Particle Property for Glass-ceramics Layer upon Sintering of the Sandwich Substrate with Inner-constraining Particles Layer

Nakao, Shuya; Kojima, Masaru; Tanaka, Kenji

doi:10.4164/sptj.42.244

Cited by 7 publications

(3 citation statements)

References 6 publications

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“…24) For other liquid phase sintering materials, such as cermet (WC Co and TiCNi), ceramics and glass mixed phase materials (Al 2 O 3 and Si 3 N 4 ), the liquid phase sintering is the most basic liquid phase sintering. 4,25) The simulation results also show that reducing £ SL improves the wettability to the solid phase, facilitates rearrangement, and increases the relative density, which is consistent with the real materials. It is difficult to experimentally change only £ SL independently, and it is difficult to analyze the influence of only one factor expected, so it is advantageous to analyze this point by simulation.…”

Section: Discussionsupporting

confidence: 76%

Computer Simulation for Sintering under the Presence of Liquid Phase by Monte Carlo Method

et al. 2021

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The simulation for liquid phase sintering has been newly developed by Monte Carlo method. The basic three mechanisms in liquid phase sintering, namely (1) liquid wetting on solid surface, (2) rearrangement of solid particle by capillary force of liquid, (3) growth of solid particles by solution-reprecipitation through liquid phase (Ostwald ripening), have been introduced in the simulation. The liquid wetting on a solid plane or solid particle surface progressed more easily as decreasing the energy between solid and liquid (£ SL ). The introduction of rearrangement into the simulation brought the result that relative density increased with decreasing £ SL and pores remained. The introduction of Ostwald ripening in addition to liquid wetting and rearrangement produced the result that relative density increased on the whole and the effect of £ SL became clear. The simulation including Ostwald ripening was able to demonstrate clearly and continuously the influence of £ SL on growth and contiguity of solid particles.

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Section: Discussionsupporting

confidence: 76%

Computer Simulation for Sintering under the Presence of Liquid Phase by Monte Carlo Method

et al. 2021

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“…[1][2][3][4][5] LTCCs are used as a small passive component that is co-firable with a wiring conductor with a high conductivity, such as Cu, Ag, or Au, by lowering the sintering temperature of the ceramic used as the insulating layer. [6][7][8][9][10][11][12][13][14][15][16] LTCCs have a very small dielectric loss, which affects the high-frequency properties, when compared with organic resin generally used as insulating materials in electronic circuits. 17) Therefore, LTCCs are suitable materials for constructing filters.…”

Section: Introductionmentioning

confidence: 99%

Novel Low Temperature Co-Fired Ceramic Material System Composed of Dielectrics with Different Dielectric Constants

Sakamoto

Adachi

Kaneko

et al. 2013

Jpn. J. Appl. Phys.

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We found that the co-firing low temperature co-fired ceramic (LTCC) materials of different dielectric constants (εr) with Cu wiring is achievable using a novel, original design. It was confirmed that the dielectric characteristics of the dielectrics designed in this study are very suitable for the use of the dielectrics in electronic components such as filters mounted in high-speed radio communication equipment. The dielectric constants of the lower- and higher-dielectric-coefficient materials were 8.1 and 44.5, respectively, which are sufficiently effective for downsizing LTCC components. Observing the co-fired interface, it was confirmed that excellent co-firing conditions resulted in no mechanical defects such as delamination or cracks. On the basis of the results of wavelength dispersive X-ray spectrometry (WDX) and X-ray diffractometry (XRD), it was confirmed that co-firing with minimal interdiffusion was realized using the same glass for both dielectrics. It is concluded that the materials developed are good for co-firing in terms of the mechanical defects and interdiffusion that appear in them.

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“…There are three main processes involved in nonshrinkage (in the x – y direction) sintering technology for LTCC, 6–10 that is, self‐constrained sintering, pressureless constrained sintering, and pressure‐assisted constrained sintering. Although the conventional free sintering process is cost effective, the variation in the dimensions of the fired circuit design and its dimensional tolerances are large.…”

Section: Introductionmentioning

confidence: 99%

Development, Analysis, and Application of a Glass–Alumina‐Based Self‐Constrained Sintering Low‐Temperature Cofired Ceramic

Takada¹,

Nakao²,

Kojima³

et al. 2007

Int J Applied Ceramic Tech

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The effects of an inner constraint layer and alumina particles on the microstructure, strength, and shrinkage of the laminated low‐temperature cofired ceramic (LTCC) green sheet were investigated. Alumina particles of several sizes were used in the inner‐constraint layer in order to strengthen the LTCC substrate. Smaller alumina particles in the inner‐constraint layer produced a substrate with a high bending strength. Sintering shrinkage in the x–y direction of the LTCC is related to the bending strength of the debinded alumina particle layer used for an inner‐constraint layer. A larger pore size in the inner‐constraint layer was found to increase the distance of the glass penetration from the glass–alumina layer into the inner‐constraint layer. The total thickness of the constraint layer changes the shrinkage in the x–y direction and the bending strength.

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Influence of Glass Particle Property for Glass-ceramics Layer upon Sintering of the Sandwich Substrate with Inner-constraining Particles Layer

Cited by 7 publications

References 6 publications

Computer Simulation for Sintering under the Presence of Liquid Phase by Monte Carlo Method

Computer Simulation for Sintering under the Presence of Liquid Phase by Monte Carlo Method

Novel Low Temperature Co-Fired Ceramic Material System Composed of Dielectrics with Different Dielectric Constants

Development, Analysis, and Application of a Glass–Alumina‐Based Self‐Constrained Sintering Low‐Temperature Cofired Ceramic

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