La2O3 Content Research Articles

Impact of La2O3 reinforcement on the mechanical, and photon shielding properties of La2O3-B2O3 glass

We aimed to explore the role of the La2O3 on the photon shielding effectiveness of La2O3-B2O3 glass systems for low energy range (13.81–160.6 keV). We found that the mass attenuation coefficient (MAC) at 13.81 keV is varied between 46.79 and 52.17 cm2/g. We found that the MAC increases in the order from BLa15 to BLa35, which suggested that the insertion of La2O3 causes an enhancement in the MAC values. We also reported the linear attenuation coefficients (LAC) and we found that the LAC results are in line with the MAC results and the LAC follow the order of BLa15 > BLa20 > BLa25 > BLa30 > BLa35. The effective atomic numbers (Zeff) is also reported within the range 13.81–160.6 keV. The Zeff decreases between 13.81 and 35.8 keV, and a sudden increment in the Zeff is observed at 49.62 keV, then the Zeff continue in decreasing between 81 and 160.6 keV. The correlation between different shielding factors and the amount of La2O3 suggested the possibility of developing a new effective radiation shielding glasses, provided the utilization of high content of La2O3. On the other hand, the Makishima-Mackenzie model aids in estimating some essential mechanical moduli, including Young’s (E), bulk (B), shear (S), and longitudinal (L). All mechanical moduli behave in decreasing trend as the insertion ratio of La2O3 goes through 15–35 mol%. The E, B, S, and L reduce from 94.02 to 82.84, 59.80–52.69, 37.98–33.46, and 88.28–77.78 GPa in the respective order.

The transition from non-ohmic to ohmic characteristics in La2O3 doped ZnO–MgO–TiO2 linear resistance ceramics

La2O3 doped ZnO–MgO–TiO2 based linear resistance ceramics were prepared by the solid phase sintering method. The doping content of La2O3 is from 0.0 wt% to 2.5 wt%. The solubility of La2O3 in ZnO is less than 0.06 mol% (0.5 wt%), La0.66TiO2.993 phases will be formed at grain boundary and change the distribution of spinel phase when La2O3 is excessive. For I–V test, undoped sample exhibits typical non-ohmic characteristics, but La-doped samples show excellent ohmic behaviors under low DC and high pulse current (PC). The complex impedance spectrum and the frequency dependent conductivity furtherly demonstrate that La-doped samples possess linear characteristics because there is no grain boundary effect which can affect the electron transmission at grain boundaries. Besides, the decrease of the grain boundary barrier from 0.2135eV for undoped sample to 0.0031eV for 0.5 wt% La doped samples can account for the elimination or reduction of grain boundary effect. In this work, the transition from non-ohmic to ohmic properties by doping La2O3 in ZnO–MgO–TiO2 multiphase ceramics is realized.

Effects of La2O3 contents on microstructure and properties of laser-cladded 5 wt% CaB6/HA bioceramic coating

In the present work, 5 wt% CaB6/hydroxyapatite (HA) bioceramic coatings with different La2O3 contents (0–0.6 wt%) have been fabricated by a laser cladding technique on Ti–6Al–4V. The effects of La2O3 contents on microstructure and properties of the laser-cladded 5 wt% CaB6/HA coatings have been carefully investigated. The results show that the microstructure is obviously refined, and the structure is relatively uniform after doping 0.2–0.4 wt% La2O3. As the La2O3 content increases, the corrosion resistance are found to increase firstly and then gradually decrease. The x-rays diffraction analysis confirms that the amount of HA and TCP (calcium phosphate) in the coating reaches maximum after doping 0.2 wt% La2O3. The La2O3-doped coatings show a significantly higher bone-like apatite precipitation after immersion in simulated body fluid compared with La2O3-free coating. In vitro experiment also shows that 5 wt% CaB6/HA bioceramic coatings with 0.2–0.4 wt% La2O3 are more suitable for the attachment and proliferation of MG63 cells, exhibiting superior bioactivity and biocompatibility.

Crystallization characteristics and structural analysis of CaO–SiO2-based mold fluxes with different La2O3 contents

To elucidate deterioration mechanism of La2O3 on the crystallization performance of conventional mold fluxes, crystallization characteristics and structure of CaO–SiO2-based mold fluxes with various contents of La2O3 were studied. Results showed that adding 0 wt% to 15 wt% La2O3 increased initial crystallization temperature and critical cooling rate of slags. Crystalline phases changed from Ca4Si2F2O7 to CaLa2(SiO4)2 and Ca4Si2F2O7 with the increase in content of La2O3. Furthermore, crystallization incubation time was shortened gradually. Combined with structural analysis, the main reasons for enhanced crystallization characteristics of mold fluxes with La2O3 were following two factors. First, high-polymerized Q3 units were simplified by O2− released from La2O3 to form low-polymerized units Q2, Q1, and Q0. As a result, NBO/T of slags increased and the degree of polymerization decreased, resulting in the reduction of mass transfer resistance of ions and facilitating crystal nucleation. Second, with an increase in La2O3 content, La3+ exhibited strong attraction to simpler Q0 ([SiO4]4-) units due to its high field strength and large electric charge, which was conducive to the precipitation of rare earth phase. In this study, La3+ together with Ca2+ played charge balance effect and combined with Q0 units to form CaLa2(SiO4)2 phase at high temperature.

Fluoride vaporization and crystallization of CaF2–CaO–Al2O3–(La2O3) slag for vacuum electroslag remelting

The vaporization and crystallization of CaF2–CaO–Al2O3 slags with different La2O3 contents for electroslag remelting were investigated by various analytical methods. The results show that the main volatiles from investigated slag within 7.4 wt% La2O3 content at 1723 K are CaF2 and AlF3. The weight loss of CaF2–CaO–Al2O3-(La2O3) slags decrease with increase of La2O3 content in both thermo gravimetric experiment and vacuum condition. The addition of La2O3 within 7.4 wt% reduces the viscosity and breaking temperature of investigated slag, and the change of viscosity is not the main reason to inhibit the fluoride vaporization. The vapor pressure of CaF2 and AlF3 at 1723 K decreases with increase of La2O3 content because of the changes in component activity. Thus, fluoride vaporization becomes weakened. The crystalline phases of CaF2–CaO–Al2O3 slag are 11CaO·7Al2O3·CaF2 and CaF2, while the crystalline phases of slag within 7.4 wt% La2O3 content are (CaLa)Al3O7, La(AlO3) and CaF2. The La2O3 addition can decrease the crystallization temperature of CaF2 and prevent the precipitation of 11CaO·7Al2O3·CaF2.

Effect of La2O3 addition on wear properties of Ni60a/SiC coating using laser-cladding

This study investigates the influence of rare-earth La2O3 content on the wear resistance of a laser clad coating. Different contents of nano-rare-earth La2O3 were added to a Ni60a/SiC composite powder to analyse the phase composition, element distribution and friction and wear characteristics of the coating to determine the optimum amount of rare-earth La2O3 to be added. The results showed that the coating with 2 wt% La2O3 added based on the Ni60a/SiC composite powder exhibited the best comprehensive properties. X-ray diffraction and X-ray photoelectron spectroscopy analyses showed that new phases were formed in the coatings with 2 wt% La2O3 mainly consisted of hard phases such as Cr7C3 and CrC. Scanning electron microscopy revealed that the coating grain with 2 wt% La2O3 was refined, the density increased and the distribution of coating elements was more uniform. The wear surface coating was slightly peeled off, and a friction coefficient of 0.63 and a wear depth of 15.79 µm were achieved, which were 3% and 86% lower than those of the 65Mn matrix, respectively. The wear amount was 0.002 g. The wear surface experienced an oxidation reaction.

Crystallization and Dielectric Properties of BaO-SrO-PbO-TiO2-Nb2O5-SiO2 Glass-Ceramic Composites with La2O3 Addition

Glass-ceramic composite samples with different La2O3 content were prepared via melt-quenching followed by controlled crystallization. X-ray diffraction(XRD) analysis reveals that when the addition amount of La2O3 in the glass sample is less than 1mol%, two phases of perovskite structure and tungsten-bronze structure are formed after annealing at 1000°C for 3h. When the addition amount of La2O3 in the glass sample is increased to 2mol%, a new phase of pyrochlore structure is formed. Moreover, the addition of La2O3 causes the change in the lattice parameters of the glass-ceramic crystal phase. The microstructure observed that the ceramic phase grain size is in the nanometer level. The shape of some grains becomes an elongated structure when the La2O3 content in the sample increases to 2 mol%, and the grain size is increased significantly. The dielectric constant of the BaO-SrO-PbO-TiO2-Nb2O5-SiO2 glass-ceramic system is decreased with the increase of La2O3 addition, and the dielectric loss of the sample is decreased to the range of 0.003-0.008. The electric field stability of the dielectric constant was significantly improved with the addition of La2O3, indicating that adding a certain proportion of La2O3 to the BaO-SrO-PbO-TiO2-Nb2O5-SiO2 glass-ceramic system can effectively improve the dielectric properties, and it has a promising application as a dielectric material.

Structure and crystallization of glassy La2O3–CaO–SiO2–CaF2 system rare-earth slag with variable rare-earth content

Raman spectroscopy and differential scanning calorimetry were employed to investigate the structure, crystallization behavior and crystallization activation energy of the La2O3–CaO–SiO2–CaF2 (RE) slags with different RE contents. Raman spectroscopy analysis indicated that the RE oxide, La2O3, acted as a network modifier, with the increase in La2O3 content decreasing the degree of polymerization of the RE slag. As the La2O3 content increased, the number of highly polymerized Q2 and Q3 species gradually decreased, while the minimally polymerized Q0 and Q1 species increased, and depolymerizing the complex network structure in the slag. The slag mainly contained the following three crystal phases: (Ca, La)5(SiO4)6F, CaSiO3, and Ca4Si2O7F2. When the La2O3 content increased to 15%, an additional Ca2SiO2F2 crystalline phase appeared. Furthermore, an increase in the La2O3 content from 10 to 17% reduced the crystallization temperature of the RE phase in the slag from 1641 to 1599K. The crystallization behavior of the RE phase under different cooling rates revealed that the increase in La2O3 content reduced the effective crystallization activation energy of the RE phase, thus enhancing the crystallization of the RE phase. Thus, a correlation between the structure and crystallization of the RE slag was established.

The Vital Role of La2O3 on the La2O3-CaO-B2O3-SiO2 Glass System for Shielding Some Common Gamma Ray Radioactive Sources.

The role La2O3 on the radiation shielding properties of La2O3-CaO-B2O3-SiO2 glass systems was investigated. The energies were selected between 0.284 and 1.275 MeV and Phy-X software was used for the calculations. BLa10 glass had the least linear attenuation coefficient (LAC) at all the tested energies, while BLa30 had the greatest, which indicated that increasing the content of La2O3 in the BLa-X glasses enhances the shielding performance of these glasses. The mass attenuation coefficient (MAC) of BLa15 decreases from 0.150 cm2/g to 0.054 cm2/g at energies of 0.284 MeV and 1.275 MeV, respectively, while the MAC of BLa25 decreases from 0.164 cm2/g to 0.053 cm2/g for the same energies, respectively. At all energies, the effective atomic number (Zeff) values follow the trend BLa10 < BLa15 < BLa20 < BLa25 < BLa30. The half value thickness (HVL) of the BLa-X glass shields were also investigated. The minimum HVL values are found at 0.284 MeV. The HVL results demonstrated that BLa30 is the most space-efficient shield. The tenth value layer (TVL) results demonstrated that the glasses are more effective attenuators at lower energies, while decreasing in ability at greater energies. These mean free path results proved that increasing the density of the glasses, by increasing the amount of La2O3 content, lowers MFP, and increases attenuation, which means that BLa30, the glass with the greatest density, absorbs the most amount of radiation.

Study on Structure and Properties of La2O3-Doped Basaltic Glasses for Immobilizing Simulated Lanthanides.

The La2O3-doped basaltic glass simulated high-level waste form (HLW) was prepared by the solid-state melt method. The simulated waste La2O3 maximum loading and the doping effect on structure, thermal stability, leaching behavior, density, and hardness of basaltic glasses were studied. XRD and SEM results show that the simulated waste loading of La2O3 in basaltic glass can be up to ~46 wt.%, and apatite (CaLa4(SiO4)3O) precipitates when the content of La2O3 reaches 56 wt.%. Raman results indicate that the addition of La2O3 breaks the Si–O–Si bond of large-membered and four-membered, but the number of A13+ involved in the formation of the network increase. Low content of La2O3 can help to repair the glass network, but it destroys the network as above 26 wt.%. DSC results show the thermal stability of simulated waste forms first increases and then decreases with the increase of La2O3 content. With the increase of La2O3 content, the density of the simulated waste form increases, and the hardness decreases. The leaching chemical stability of samples was evaluated by the ASTM Product Consistency Test (PCT) Method, which show that all the samples have good chemical stability. The leaching rates of La and Fe are three orders of magnitude lower than those of the other elements. Among them, L36 has the best comprehensive leaching performance.

High-performance B4C-LaB6 composite ceramics fabricated via hot-pressing sintering with La2O3 as sintering additive

The B4C-LaB6 composite ceramics were fabricated via hot-pressing sintering at 2050 °C and 20 MPa pressure with the mixture of boron carbide (B4C) and 2–5 wt% lanthanum oxides (La2O3) as raw materials. The effects of additive La2O3 content on the microstructures and mechanical properties of composite ceramics were investigated, and reaction mechanisms of La2O3 and B4C at different temperatures were studied in detail. La2CO5, La3BO6 and LaBO3 were formed by the reactions of La2O3 and B4C at different temperatures, and finally LaB6 was formed below 1600 °C. The comprehensive mechanical properties of B4C-LaB6 composite ceramics were optimized by adding 4 wt% La2O3, the flexural strength, fracture toughness and Vickers hardness reached 350 MPa,4.92 MP am1/2 and 39.08 GPa, respectively. The high densification and flexural strength of composite ceramics achieved in the present study were attributed to LaB6 hindering the movement of grain boundary. However, the densification was reduced caused by CO as La2O3 content increased to 5 wt%. The fast channel was formed via B4C reacting with La2O3, which accelerated migration of B4C in the sintering process. The content of La2O3 played an important role in the fracture mode of the composite ceramics, and ultimately affected the fracture toughness of the composite ceramics.

Effect of high-energy attrition milling and La2O3 content on the microstructure of Mo-La2O3 composite powders

Mo-La2O3 composites are potential high-temperature materials for future technology devices operating at temperatures above 1300 °C because of their excellent thermal stability, high mechanical properties and good creep resistance. In this study, we focused on the preparation of Mo-matrix/lanthanum oxide (La2O3) composite powders using high-energy attrition milling. The effects of rotational milling speed (350 and 800 rpm) and La2O3 content (2.5 and 10 vol. %) on the microstructural evolution, phase composition, morphology, and distribution of the second phase in the produced composite Mo-La2O3 powders were investigated in details. The results show that the most interesting composite powder was Mo-10 vol.% La2O3 produced using a rotational speed of 800 rpm, which exhibited better distribution, smaller particle size and higher amount of ceramic phase introduced in the interiors of the Mo grains.

Effect of La2O3 on microstructure and properties of Fe-based alloy coatings by laser cladding

One of the challenges limiting the application of laser cladded Fe-based coatings is the coarse columnar grains formed during the process. In order to improve the microstructure homogeneity of laser cladded coatings, Fe-based alloy (Fe78.5Cr15.6Ni4.0Si0.7) composite coatings with different La2O3 additions were prepared on the surface of 45-steel substrate by laser cladding. The effect of La2O3 content on the microstructure and properties composite coatings were systematically studied. X-ray diffractometer (XRD) and scanning electron microscope (SEM) were used to analyze the phase structure and microstructural evolution of Fe-based alloy composite coatings, and the hardness and tribological properties were measured by the microhardness tester and ball on disc wear tester, respectively. The results show that the addition of La2O3 plays the role of grain refinement, and certain amount of addition can completely eliminate the coarse columnar grains. Due to the fine-grain strengthening and dispersion strengthening of La2O3, the hardness and wear resistance of Fe-based alloy composite coatings have been improved. Especially, when the content of La2O3 is 1 wt%, the hardness increases to 3.1 times and the wear loss decreases to 27.7%, compared with the substrate material. The wear surface of composite coating with 1 wt% La2O3 suffered minor damage, and the wear mechanism is slightly abrasive wear. In contrast, higher amount of 2 wt% La2O3 addition has less effective grain refining where some columnar grains appear on the interface, and the hardness and wear resistance of composite coatings decrease as well. Meanwhile, the wear mechanism is transformed into a mixed mode of abrasive wear and adhesive wear.

Synthesis and Characterization of Lithium-Ion Conductive LATP-LaPO4 Composites Using La2O3 Nano-Powder.

LATP-based composite electrolytes were prepared by sintering the mixtures of LATP precursor and La2O3 nano-powder. Powder X-ray diffraction and scanning electron microscopy suggest that La2O3 can react with LATP during sintering to form fine LaPO4 particles that are dispersed in the LATP matrix. The room temperature conductivity initially increases with La2O3 nano-powder addition showing the maximum of 0.69 mS∙cm−1 at 6 wt.%, above which, conductivity decreases with the introduction of La2O3. The activation energy of conductivity is not largely varied with the La2O3 content, suggesting that the conduction mechanism is essentially preserved despite LaPO4 dispersion. In comparison with the previously reported LATP-LLTO system, although some unidentified impurity slightly reduces the conductivity maximum, the fine dispersion of LaPO4 particles can be achieved in the LATP–La2O3 system.

Optical, thermal and radiation shielding properties of B2O3–NaF–PbO–BaO–La2O3 glasses

The techniques of melt-quenching have been used to generate 53B2O3—2NaF—27PbO – \((20-x)\) BaO—\(x\) La2O3 \((0\le x \ge 15) glass system\). XRD patterns have been established the amorphous character of glass samples. There is a clear evidence of the role of the La2O3 modifier in the glass network. The thermal characteristics have been identified to increase with an increase in La2O3 content. Increasing La2O3 increases the linear and non-linear optical bandgap energy and the Urbach energy. By adding La2O3 to the glass samples, the refractive index, molar polarizability, polarizability, and optical basicity increased. The bulk modulus and the glass transition temperature increased because of the increase in bond strength. The number of bonds per unit increased with the increase in La2O3 content because of the modifier character of La2O3 in the glass samples. Many optical parameters (ε \(\boldsymbol{\infty }\)), (εo), \({\chi }^{(1)}\), \(\left({\chi }^{(3)}\right)\) and \({(n}_{2})\) as a function of linear and non-linear \({E}_{opt}\) have been obtained. The extent of shielding in this article has been examined with the increment in La2O3 at the expense of BaO. The results correspond with similar studies conducted before.

Influence of La2O3 on the structural, mechanical and optical features of cobalt doped heavy metal borate glasses

The impact of rare-earth oxide (La2O3) on the structural, mechanical and optical properties of cobalt-doped heavy metal borate glassy system is studied. XRD assured the amorphous nature of the prepared samples. The density and average boron-boron separation were found to increase with La2O3 content, thereby enforcing the compactness of the glass network. FT-IR analysis revealed the growth of NBO's ratio due to the gradual conversion of the tetrahedral (BO4) to trigonal (BO3) units with the development of a certain boroxol group (B3O6) fraction. A noticeable enhancement of the elasticity properties, such as the elastic, bulk, and Young's moduli, as well as the microhardness, was confirmed by measuring the ultrasound velocities within prepared samples. The absorption and photoluminescence emission spectra showed a progressive enhancement of Co3+/Co2+ ions in the tetrahedral and/or octahedral positions with La2O3 content. The ligand field strength and Racah parameters were estimated, in which the ionicity nature between Co2+ ions and the nearby ligands is inferred from the nephelauxetic effect. Absorption edge analysis, here performed through Tauc's model, showed a decrease in the band gap and a rise in Urbach energy; the values of each, together with the metallization parameter, reflect the semiconducting character of the prepared samples. The dispersion of the refractive index was determined using the Wemple-DiDomenico single oscillator model and compared to the optical gap energy. Additionally, the nonlinear optical coefficients, here determined within the lower energy spectral range using a third-order nonlinear susceptibility, exhibited progressively increasing value, suggesting a possible integration of the current system in potential nonlinear optical applications. Furthermore, the absorption and photoluminescence spectral tunability here offered through La2O3 additives qualifies the current glasses as optically active materials for many possible applications in multifunctional optical devices operating in visible and near-infrared spectral regimes.

Improvement of microstructure, mechanical properties and cutting performance of Ti(C,N)-based cermets by ultrafine La2O3 additions

Ti(C,N)-WC-Mo2C-TaC-Co-Ni cermets with various content of La2O3 were prepared by gas-pressure sintering at 1450 °C. The effects of ultrafine La2O3 additions (0, 0.05, 0.1 and 0.2 wt%) on the microstructure, mechanical properties, wear resistance and cutting performance of cermets were explored. In the microstructure of cermets, the La2O3 particles and dissolved La element in binder phases were observed, which could inhibit the dissolution-precipitation process of ceramics phases during liquid-sintering. Furthermore, the La2O3 could absorb and react with the impurity Al element with low melting point from raw powders, avoiding the appearance of liquid phase at the low temperature and partial overheating during sintering process. These mechanisms could inhibit the abnormal growth of Ti(C,N) core-(Ti,W,Mo,Ta)(C,N) rim structures effectively, leading to the thinning of brittle rim phases and coarsening of wear-proof Ti(C,N) particles. The decrease of proportion of brittle rim phase and ultrafine Ti(C,N) particles promoted the fracture toughness. The increase of proportion and grain size of Ti(C,N) improved the hardness, wear resistance and cutting performance significantly. However, the excessive addition of La2O3 would result in the agglomeration of La2O3, causing the sharp decline of mechanical properties and cutting performance. The cermet with 0.1 wt% La2O3 addition possessed the optimal mechanical properties with Vickers hardness, transverse rupture strength and fracture toughness of 1710 (HV30) Kgf/mm2, 2480 MPa and 11.7 MPa m1/2, respectively.

Effect of La2O3 content on the densification, microstructure and mechanical property of W-La2O3 alloy via pressureless sintering

In the present work, the influences of La2O3 content (0–5.0 wt%) on the densification and grain growth of tungsten (W) nanopowders during pressureless sintering were systematically investigated. The densification inhibitory effect was enhanced with the increase of the amount of La2O3 addition, resulting in that the densification rate decreases from pure W to W/5.0wt%La2O3 composite powder. However, the grain size of W first decreases from 0 wt% to 2.0wt%La2O3 addition due to the increase of number density of La2O3 particles, and then increases from 2.0 wt% to 5.0wt%La2O3 addition because of the significant increase of the particle size and the decrease of the number density. On the premise of achieving near full density, the grain size of all W-La2O3 alloys sintered by pressureless sintering is very small, only 0.47–1.90 μm. The W-2.0wt%La2O3 alloy sintered at 1650 °C with the grain size of 0.47 μm possesses the highest Vickers microhardness of 739.3 HV0.2.

Effect of La2O3 on the viscosity and structure of CaO–SiO2(–Al2O3)–La2O3 melts

The rotating cylinder method was used to understand the effects of La2O3 and the La2O3/Al2O3 ratios on the melt viscosity of CaO–SiO2(–Al2O3)–La2O3 at high temperatures. The structural characterization of these quenched glass samples were investigated using Raman spectroscopy. The results show that the viscosity of the CaO–SiO2(–Al2O3)–La2O3 melt is significantly reduced due to additions of La2O3. The La2O3 additions simplified the structure of the silicon-oxygen ion groups in the melt, which created a smaller melt viscosity. The critical transition temperature is proportional to the La2O3 content and inversely proportional to the La2O3/Al2O3 ratio. La3+ and Al3+ make the viscosity-temperature curve of CaO–SiO2–Al2O3–La2O3 melt show different characteristics. There is no critical transition temperature when the melt without La2O3, and the critical transition temperature appears after adding La2O3. The La2O3 plays a role like alkaline oxide in the CaO–SiO2–Al2O3–La2O3 melt. In addition, the degree of polymerization of the melt decreased relative to the La2O3 content and La2O3/Al2O3 ratio. Consequently, the La2O3 behaves as a network modifier for the complex silicate anions of CaO–SiO2–La2O3 and CaO–SiO2–Al2O3–La2O3 melts.

Influence of La2O3 doping on the characteristics of ZnO linear resistors

ZnO linear resistors have anticipated application prospect in electrical and electronic industry, but the study of La2O3 doping is still poor. In this paper, the ZnO linear resistors doped with Al2O3, MgO, SiO2 and La2O3 were prepared by the conventional solid-state sintering method, and the effects of La2O3 doping on the microstructure and comprehensive electrical properties were studied. Structural and morphological characteristics of the samples were investigated by scanning electron microscope (SEM) and X-ray diffraction (XRD) respectively. The property of resistivity-frequency reveals that the samples could be applied in high-frequency electric field. The dielectric property indicates Maxwell-Wagner interfacial polarization exists in the matrixes. With La2O3 content of 1 wt%, ZnO linear resistors have the best linear performance: the grain size is relatively uniform, the resistance temperature coefficient αT is − 6.63 × 10−3/°C, and the nonlinear coefficient α is 1.09. The comprehensive analysis of the influence of La2O3 doping on the electrical properties is of important significance for preparing ZnO linear resistors with excellent electrical properties.