Composition design, electrical properties, and temperature stability in (1 - x)K0.44Na0.56Nb0.96Sb0.04O3- x Bi0.45La0.05Na0.5ZrO3 lead-free ceramics

Jian Ma; Juan Wu; Bo Wu

doi:10.1039/c8ra06183a

Composition design, electrical properties, and temperature stability in (1 - x)K_0.44Na_0.56Nb_0.96Sb_0.04O₃- x Bi_0.45La_0.05Na_0.5ZrO₃ lead-free ceramics

RSC Adv. 2018 Aug 23;8(52):29871-29878. doi: 10.1039/c8ra06183a. eCollection 2018 Aug 20.

Authors

Jian Ma¹, Juan Wu¹, Bo Wu²

Affiliations

¹ Physics Department, Sichuan Province Key Laboratory of Information Materials, Southwest Minzu University Chengdu 610041 P. R. China majian33@hotmail.com.
² Sichuan Province Key Laboratory of Information Materials and Devices Application, Chengdu University of Information Technology Chengdu 610225 P. R. China wubo7788@126.com.

Abstract

In this work, we designed a new system of (1 - x)K_0.44Na_0.56Nb_0.96Sb_0.04O₃-xBi_0.45La_0.05Na_0.5ZrO₃ (KNNS-xBLNZ, 0 ≤ x ≤ 0.06) ceramics, and systemically investigated both their electrical performance and temperature stability. Through optimizing the composition, a relatively good comprehensive performance (e.g., d ₃₃ ∼ 455 ± 10 pC N^-1, k _p ∼ 0.47 ± 0.02, T _C ∼ 266 °C, strain ∼ 0.148%, and ) is obtained in the ceramics with x = 0.040, which is attributed to the construction of a rhombohedral-orthorhombic-tetragonal (R-O-T) phase boundary. Moreover, a good temperature stability of remnant polarization (P _r) as well as strain value (P _{r100 °C}/P _rRT ∼ 89.6%, P _{r180 °C}/P _rRT ∼ 73.2%, S _{100 °C}/S _RT ∼ 92.6%, S _{180 °C}/S _RT ∼ 74.1%) is gained in KNNS-0.040BLNZ ceramics with a broad temperature range from room temperature to 180 °C. Hence, we believe that KNNS-xBLNZ ceramics opens a window for the practical application of lead-free ceramics.