Microwave sintering of BaTio3 thick films

Bai, Kang; Kim, Ho–Gi

doi:10.1007/bf00271327

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…Cherradi et al [17] sintered BaTiO 3 by microwaves with the aid of LiF sintering aid. Derling and Abicht [18] indicated that microwave sintering of barium titanate doped with Cu leads to accelerated shrinkage, and that the average grain size could be controlled by the heating rate, whilst Bai and Kim [19] sintered BaTiO 3 thick films. Thakur et al [20] were able to sinter BaTiO 3 at 1450 8C in 25 min compared to 4 h by radiant heating.…”

Section: Microwave-assisted Sintering Of Electronic Ceramicsmentioning

confidence: 99%

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Enhanced microwave-assisted sintering of X7R ceramic dielectrics for use in multilayer capacitors

McInroy

Rowley

Freer

2010

Ceramics International

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Section: Microwave-assisted Sintering Of Electronic Ceramicsmentioning

confidence: 99%

“…A number of workers have investigated the sintering of barium titanate based ceramics in a microwave field [16][17][18][19][20][21][22][23]. Humphrey and Anderson [16] were amongst the first groups to employ microwave processing.…”

Section: Microwave-assisted Sintering Of Electronic Ceramicsmentioning

confidence: 99%

Enhanced microwave-assisted sintering of X7R ceramic dielectrics for use in multilayer capacitors

McInroy

Rowley

Freer

2010

Ceramics International

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“…This structure is then sintered under an atmosphere with the dual purpose of heating and provide reductive conditions to prevent electrode oxidation and the conditions for achieving the final properties of the MLCC. There are several reports about microwave processing of ceramics [1], some under claims of uniform heat transfer and higher efficiency [2], and reaction rates compared to conventional heating, as well as non-thermal effects of microwaves in the processing [3]. The purpose of this research is to sinter layers of BaTiO3, and the green MLCC's with microwaves and compare them with those sintered conventionally.…”

Section: Introductionmentioning

confidence: 99%

Sintering of Mlcc’s Barium Titanate With Microwaves

Aguilar-Garib

Tijerina-García

Garza-Guajardo

2019

Proceedings 17th International Conference on Microwave and High Frequency Heating

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A comparison of microwave and conventional, in an electric resistance furnace, sintered layers of dielectric base barium titanate (BaTiO3) of the kind employed for multilayer ceramic capacitors (MLCC) was performed. Two kinds of samples were used for each processing method; the layers alone without electrodes, and the green MLCC with the layers and electrodes interdigitated. Samples were exposed to microwaves for 20 minutes and heated up to 1050°C and 1150°C for sintering in a crucible with graphite that acted as reduction agent and microwave susceptor. Conventional sintering was performed in the same arrangement but lasted 120 minutes since it was found that 20 minutes was not enough time to achieve sintering. Heating rate in both cases was 10 °C/min. It was observed that the layers without the electrodes achieve about the same densification for both processes, while in the case of the green MLCC’s the results were variable, ranging from sample that became dust, to cracked samples and some well sintered ones. At least in the microwave case, it is possible that the variability of the results is due to the importance of the location of the sample in the cavity that in turn affects the electric field pattern, especially because the presence of the electrodes that can cause overheating around them.

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