Microwave dielectric properties and microstructures of CuO- and ZnO-doped LaAlO3 ceramics

Cheng Liang Huang; Ruei Jsung Lin; Hui Liang Chen

doi:10.1016/S0025-5408(01)00818-2

Microwave dielectric properties and microstructures of CuO- and ZnO-doped LaAlO₃ ceramics

Cheng Liang Huang
, Ruei Jsung Lin
, Hui Liang Chen

Department of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

The microwave dielectric properties and the microstructures of 0.25wt.% CuO-doped LaAlO₃ ceramics with ZnO additions have been investigated. The sintered LaAlO₃ ceramics are characterized by X-ray diffraction spectra and scanning electron microscopy (SEM). Tremendous reduction in sintering temperature can be achieved with the addition of sintering aids CuO and ZnO. The ceramic samples show that dielectric constants (ε_r) of 22-24 and Q × f values of 33,000-57,000 (at 9.7 GHz) can be obtained at low sintering temperatures 1340-1460°C. The temperature coefficient of resonant frequency varies from -24 to -48ppm/°C. At the level of 0.25wt.% CuO and 1wt.% ZnO additions, LaAlO₃ ceramics possesses a dielectric constant (ε_r) of 23.4, a Q × f value of 57,000 (at 9.7GHz) and a τ_f value of -38ppm/°C at 1400°C for 2h.

Original language	English
Pages (from-to)	449-457
Number of pages	9
Journal	Materials Research Bulletin
Volume	37
Issue number	3
DOIs	https://doi.org/10.1016/S0025-5408(01)00818-2
Publication status	Published - 2002 Mar 1

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/S0025-5408(01)00818-2

Cite this

@article{a055d7985cf343698e1183edc4914908,

title = "Microwave dielectric properties and microstructures of CuO- and ZnO-doped LaAlO3 ceramics",

abstract = "The microwave dielectric properties and the microstructures of 0.25wt.\% CuO-doped LaAlO3 ceramics with ZnO additions have been investigated. The sintered LaAlO3 ceramics are characterized by X-ray diffraction spectra and scanning electron microscopy (SEM). Tremendous reduction in sintering temperature can be achieved with the addition of sintering aids CuO and ZnO. The ceramic samples show that dielectric constants (εr) of 22-24 and Q × f values of 33,000-57,000 (at 9.7 GHz) can be obtained at low sintering temperatures 1340-1460°C. The temperature coefficient of resonant frequency varies from -24 to -48ppm/°C. At the level of 0.25wt.\% CuO and 1wt.\% ZnO additions, LaAlO3 ceramics possesses a dielectric constant (εr) of 23.4, a Q × f value of 57,000 (at 9.7GHz) and a τf value of -38ppm/°C at 1400°C for 2h.",

author = "Huang, \{Cheng Liang\} and Lin, \{Ruei Jsung\} and Chen, \{Hui Liang\}",

note = "Funding Information: This work was supported by the National Science Council of the Republic of China under grant NSC89-2216-E-006-066.",

year = "2002",

month = mar,

day = "1",

doi = "10.1016/S0025-5408(01)00818-2",

language = "English",

volume = "37",

pages = "449--457",

journal = "Materials Research Bulletin",

issn = "0025-5408",

publisher = "Elsevier Limited",

number = "3",

}

TY - JOUR

T1 - Microwave dielectric properties and microstructures of CuO- and ZnO-doped LaAlO3 ceramics

AU - Huang, Cheng Liang

AU - Lin, Ruei Jsung

AU - Chen, Hui Liang

N1 - Funding Information: This work was supported by the National Science Council of the Republic of China under grant NSC89-2216-E-006-066.

PY - 2002/3/1

Y1 - 2002/3/1

N2 - The microwave dielectric properties and the microstructures of 0.25wt.% CuO-doped LaAlO3 ceramics with ZnO additions have been investigated. The sintered LaAlO3 ceramics are characterized by X-ray diffraction spectra and scanning electron microscopy (SEM). Tremendous reduction in sintering temperature can be achieved with the addition of sintering aids CuO and ZnO. The ceramic samples show that dielectric constants (εr) of 22-24 and Q × f values of 33,000-57,000 (at 9.7 GHz) can be obtained at low sintering temperatures 1340-1460°C. The temperature coefficient of resonant frequency varies from -24 to -48ppm/°C. At the level of 0.25wt.% CuO and 1wt.% ZnO additions, LaAlO3 ceramics possesses a dielectric constant (εr) of 23.4, a Q × f value of 57,000 (at 9.7GHz) and a τf value of -38ppm/°C at 1400°C for 2h.

AB - The microwave dielectric properties and the microstructures of 0.25wt.% CuO-doped LaAlO3 ceramics with ZnO additions have been investigated. The sintered LaAlO3 ceramics are characterized by X-ray diffraction spectra and scanning electron microscopy (SEM). Tremendous reduction in sintering temperature can be achieved with the addition of sintering aids CuO and ZnO. The ceramic samples show that dielectric constants (εr) of 22-24 and Q × f values of 33,000-57,000 (at 9.7 GHz) can be obtained at low sintering temperatures 1340-1460°C. The temperature coefficient of resonant frequency varies from -24 to -48ppm/°C. At the level of 0.25wt.% CuO and 1wt.% ZnO additions, LaAlO3 ceramics possesses a dielectric constant (εr) of 23.4, a Q × f value of 57,000 (at 9.7GHz) and a τf value of -38ppm/°C at 1400°C for 2h.

UR - https://www.scopus.com/pages/publications/0036495366

UR - https://www.scopus.com/pages/publications/0036495366#tab=citedBy

U2 - 10.1016/S0025-5408(01)00818-2

DO - 10.1016/S0025-5408(01)00818-2

M3 - Article

AN - SCOPUS:0036495366

SN - 0025-5408

VL - 37

SP - 449

EP - 457

JO - Materials Research Bulletin

JF - Materials Research Bulletin

IS - 3

ER -