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Heat dissipating multi-component inorganic mixture of iron with high-temperature dielectric behaviour

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Title Heat dissipating multi-component inorganic mixture of iron with high-temperature dielectric behaviour
 
Creator Brahma, Gouri Sankhar
Sahu, Akash Kumar
Nayak, Suprava
 
Subject Heat dissipation
Specific heat capacity
Dielectric properties
AC conductivity
 
Description 797-806
Synthesis and characterization of two multicomponent mixtures, 0.8 Fe3(PO4)2ꞏ4H2O ꞏ 0.8 FePO4 ꞏ 2H2O ꞏ 0.5
NH4H2PO4 ꞏ 0.2(NH4)2SO4 (FPN2A) and 0.8 Fe3(PO4)2 ꞏ8H2Oꞏ 0.8FePO4ꞏ 0.5NH4H2PO4ꞏ0.2(NH4)2SO4 (FPN2B) are
reported. FPN2A and FPN2B mixtures have average crystallite sizes of 66.1 nm and 79.5 nm, respectively. The respective
optical bandgap of FPN2A and FPN2B are 6.02 eV and 5.96 eV with a refractive index of 1.99. Thermal analysis reveals
heat-dissipating behaviour of the mixtures with specific heat capacity, CP (at 307K) of 0.71 Jg–1K–1 and 0.66 Jg–1K–1 for
FPN2A and FPN2B, respectively. Further, temperature-frequency dependant dielectric properties of the FPN2C (obtained
by sintering FPN2B at 423K) have been investigated. The sintered mixture, FPN2C orchestrated variation in permittivity, ϵ′
(~17 – 42) and dielectric loss, tan δ (~0.04-0.08) in the frequency range of 1.0×103 Hz to 4.0×106 Hz up to 483K. AC
conductivity of FPN2C has been found to be ~ 8.9610–8 sm–1 up to 483K. TG-DSC analysis reveals the thermal stability of
the FPN2C over a wide range of temperature (297K to 1267K) and heat-dissipating behaviour with a CP of 0.62 Jg–1K–1.
 
Date 2024-08-21T05:07:08Z
2024-08-21T05:07:08Z
2024-08
 
Type Article
 
Identifier 2583-1321 (Online); 0019-5103 (Print)
http://nopr.niscpr.res.in/handle/123456789/64416
https://doi.org/10.56042/ijc.v63i8.10078
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJC Vol.63(08) [August 2024]