Crystal structure of Mn-Co-Ni thermistor (Mn-Co-Ni 서미스터의 결정구조 분석)

Jung-Il Lee (이정일); 민성욱; Jeong Ho Ryu (류정호)

doi:10.6111/JKCGCT.2015.25.5.225

Crystal structure of Mn-Co-Ni thermistor

Journal of the Korean Crystal Growth and Crystal Technology
Abbr : J. Korean Cryst. Growth Cryst. Technol.
2015, 25(5), pp.225~229
DOI : 10.6111/JKCGCT.2015.25.5.225
Publisher : The Korea Association Of Crystal Growth, Inc.
Research Area : Engineering > Materials Science and Engineering

Jung-Il Lee ¹, 민성욱 ², Jeong Ho Ryu ¹

¹한국교통대학교
²한국생산기술연구원

Accredited

ABSTRACT

This study was performed to investigate crystal structure of cubic spinel-type monophase oxide composed of the Mn-Co-Ni ternary system. Starting material was prepared by mixing Mn, Co, Ni oxides then evaporation to dryness. The XRD patterns were analyzed by in-situ XRD as increasing temperature from room temperature to 1400 o C in air atmosphere. The cubic spinel phase was existed in a temperature range from 900 o C. However, separation of NiO phase was detected from 1300 o C, which was the origin of deterioration in the crytallinity. The surface morphology of the manufactured NTC thermistors were analyzed by FE-SEM for comparison of good and bad samples.

KEYWORDS

NTC thermistor, Crystal structure, In-situ XRD

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