Study of the effect of latex binder on the green and fired properties of ZnO varistor discs and estimation of Weibull parameters

Begum, Shahida; Hashmi, M.S.J.

doi:10.1016/j.jmatprotec.2005.06.014

Cited by 3 publications

(4 citation statements)

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“…The strength of the fired discs with Ltx C is also higher than that of PVA. The consistency of the strength was also higher than that of Ltx B, and this can be attributed to the presence of fewer flaws in the fired body as interpreted from Weibull Modulus, m , for fired strength 16 …”

Section: Analyses and Discussionmentioning

confidence: 90%

“…The consistency of the strength was also higher than that of Ltx B, and this can be attributed to the presence of fewer flaws in the fired body as interpreted from Weibull Modulus, m, for fired strength. 16 The fired strength was changed significantly with the variation in the levels of binder at lower solid concentration as shown in Fig. 8.…”

Section: Analyses and Discussionmentioning

confidence: 92%

“…The Weibull modulus (m) and the normalizing stress (s o ) were found to be higher for the same condition. 16 The higher fired strength might be related with the higher green density, as it is thought that highly dense green body would introduce fewer flaws in the fired body.…”

Section: Analyses and Discussionmentioning

confidence: 99%

“…This consistency can be attributed to the presence of fewer flaws in the fired body as interpreted from Weibull modulus, m, for fired strength. 16 The failure mode is predominantly by electrical puncture for the varistor with all the binder systems.…”

Section: Analyses and Discussionmentioning

confidence: 99%

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Characterization and Performance Evaluation of Zinc Oxide Varistor Blocks Processed by Latex Binders

Begum

Karim

Hashmi

2008

Journal of the American Ceramic Society

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The processing of ZnO varistor has a long route with numerous contributing variables. The binder plays an important role in the fabrication of this electro‐ceramic device. Higher density and strength of a green body are critical not only for handling at its green state but also to avoid the causes of flaw formation during sintering. Use of appropriate binder can lead to improved characteristics of powder, which will reduce density gradient in the green body during compaction. Enhanced green properties can consequently lead to higher fired strength of the varistor discs. The binder system is anticipated to have an influence on the grain growth and microstructure which in turn affect the electrical performance parameters of the discs such as I–V characteristics, watt‐loss behavior, and energy absorption capability, etc. To investigate this phenomenon, several commercial latex binders and their blends have been studied and compared with the conventional plasticized polyvinyl alcohol. A positive effect was observed in the context of physical properties and electrical performance of ZnO varistors. Factorial analysis has revealed that the two input parameters (binder content and solid concentration) influence the electrical properties such as electric field intensity, non‐linear co‐efficient, energy absorption capability, and watt‐loss of ZnO varistor.

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Section: Analyses and Discussionmentioning

confidence: 90%

Section: Analyses and Discussionmentioning

confidence: 92%

Section: Analyses and Discussionmentioning

confidence: 99%

Section: Analyses and Discussionmentioning

confidence: 99%

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