Cold Sintering of Nickel Manganese Oxide for Thermistors Fabrication

IF 12.7 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Central Science Pub Date : 2024-11-14 DOI:10.1039/d4ta06380e

Julian Fanghanel, Satoshi Yokomizo, Shuichi Funahashi, Clive A Randall

引用次数: 0

Abstract

In this paper we successfully densified NiMn₂O₄ (NMO) ceramics using the cold sintering process (CSP) with various molten salt fluxes as a transient liquid phase, achieving relative densities exceeding 95%. The resulting samples exhibited comparable properties to conventionally sintered counterparts, demonstrating the feasibility of the CSP for NMO thermistor production. Electrical characterization revealed NMO samples sintered via CSP exhibited NTC behavior with material constants (β) and temperature coefficients of resistivity (α) akin to conventionally sintered materials in the range of 3500-4300 K and 0.04-0.05 K-1. Despite slightly higher resistances attributed to differences in grain size and impurities, the CSP-produced NMO samples remained within the typical range for NTC thermistors.

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冷烧结镍锰氧化物制造热敏电阻器

在本文中，我们采用冷烧结工艺（CSP），以各种熔盐流量作为瞬态液相，成功地对镍锰氧化物（NMO）陶瓷进行了致密化处理，使其相对密度超过 95%。所得样品的性能与传统烧结样品相当，证明了 CSP 用于 NMO 热敏电阻生产的可行性。电学特性分析表明，通过 CSP 烧结的 NMO 样品表现出 NTC 行为，其材料常数 (β) 和电阻率温度系数 (α)与传统烧结材料类似，范围分别为 3500-4300 K 和 0.04-0.05 K-1。尽管由于晶粒尺寸和杂质的不同而导致电阻率略高，但 CSP 生产的 NMO 样品仍在 NTC 热敏电阻的典型范围内。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Central Science Chemical Engineering-General Chemical Engineering

CiteScore

25.50

自引率

0.50%

发文量

194

审稿时长

10 weeks

期刊介绍： ACS Central Science publishes significant primary reports on research in chemistry and allied fields where chemical approaches are pivotal. As the first fully open-access journal by the American Chemical Society, it covers compelling and important contributions to the broad chemistry and scientific community. "Central science," a term popularized nearly 40 years ago, emphasizes chemistry's central role in connecting physical and life sciences, and fundamental sciences with applied disciplines like medicine and engineering. The journal focuses on exceptional quality articles, addressing advances in fundamental chemistry and interdisciplinary research.