AI Chat Paper
Note: Please note that the following content is generated by AMiner AI. SciOpen does not take any responsibility related to this content.
{{lang === 'zh_CN' ? '文章概述' : 'Summary'}}
{{lang === 'en_US' ? '中' : 'Eng'}}
Chat more with AI
Powered by AMiner. Clicking this button will take you away from SciOpen.
Home Journal of Advanced Ceramics Article
PDF (1 MB)
Cite
EndNote(RIS) BibTeX
Collect
Submit Manuscript AI Chat Paper
Show Outline
Outline
Show full outline
Hide outline
Outline
Show full outline
Hide outline
Research Article | Open Access

Study of 0.9Al2O3–0.1TiO2 ceramics prepared by a novel DCC-HVCI method

Jia-Min WU, Huan XIAO, Meng-Yue LIU, Ying CHEN( ), Yi-Xin MA, Li-Jin CHENG( ), Yu-Sheng SHI
State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Show Author Information

Abstract

In this paper, in-situ coagulation of 0.9Al2O3–0.1TiO2 suspension and microwave dielectric properties of 0.9Al2O3–0.1TiO2 ceramics prepared by a novel direct coagulation casting via high valence counter ions (DCC-HVCI) method were proposed. The 0.9Al2O3–0.1TiO2 suspension could be coagulated via controlled release of calcium ions from calcium iodate at an elevated temperature. The influence of tri-ammonium citrate (TAC) content, solid loading, and calcium iodate content on the rheological properties of the suspension was investigated. In addition, the influence of coagulation temperature on coagulation time and properties of green bodies was also studied. It was found that the stable 0.9Al2O3–0.1TiO2 suspension could be successfully prepared by adding 0.3 wt% TAC and adjusting pH value to 10–12 at room temperature. 0.9Al2O3–0.1TiO2 green bodies with uniform microstructures were coagulated by adding 8.0 g/L calcium iodate after treating at 70 ℃ for 1 h. 0.9Al2O3–0.1TiO2 ceramics, sintered at 1500 ℃ for 4 h and annealed at 1100 ℃ for 5 h, showed uniform microstructures with density of 3.62±0.02 g/cm3. The microwave dielectric properties of 0.9Al2O3–0.1TiO2 ceramics prepared by DCC-HVCI method were: εr= 11.26±0.06, Q×f = 11569± 629 GHz, τf= 0.93±0.60 ppm/℃. The DCC-HVCI method is a novel and promising route without binder removal process to prepare complex-shaped microwave dielectric ceramics with uniform microstructures and good microwave dielectric properties.

Keywords

rheological propertiesmicrowave dielectric properties0.9Al2O3–0.1TiO2DCC-HVCI

References

[1]
X Ye, W Lei, W-Z Lu. Microwave dielectric characteristics of Nb2O5-added 0.9Al2O3–0.1TiO2 ceramics. Ceram Int 2009, 35: 2131–2134.
Crossref Google Scholar
[2]
A Stiegelschmitt, A Roosen, C Ziegler, et al. Dielectric data of ceramic substrates at high frequencies. J Eur Ceram Soc 2004, 24: 1463–1466.
Crossref Google Scholar
[3]
JM Heintz, P Letullier, JL Miane, et al. Dielectric properties of alumina lamellar ceramics. Mat Sci Eng B 1998, 52: 84–88.
Crossref Google Scholar
[4]
C-L Huang, J-J Wang, C-Y Huang. Sintering behavior and microwave dielectric properties of nano alpha-alumina. Mater Lett 2005, 59: 3746–3749.
Crossref Google Scholar
[5]
NM Alford, SJ Penn. Sintered alumina with low dielectric loss. J Appl Phys 1996, 80: 5895–5898.
Crossref Google Scholar
[6]
KP Surendran, MT Sebastian, MV Manjusha, et al. A low loss, dielectric substrate in ZnAl2O4–TiO2 system for microelectronic applications. J Appl Phys 2005, 98: 044101.
Crossref Google Scholar
[7]
Y Ohishi, Y Miyauchi, H Ohsato, et al. Controlled temperature coefficient of resonant frequency of Al2O3–TiO2 ceramics by annealing treatment. Jpn J Appl Phys 2004, 43: L749.
Crossref Google Scholar
[8]
Y Miyauchi, Y Ohishi, S Miyake, et al. Improvement of the dielectric properties of rutile-doped Al2O3 ceramics by annealing treatment. J Eur Ceram Soc 2006, 26: 2093–2096.
Crossref Google Scholar
[9]
J-M Wu, W-Z Lu, W Lei, et al. Effects of aqueous gelcasting and dry pressing on the sinterability and microwave dielectric properties of ZnAl2O4-based ceramics. Ceram Int 2011, 37: 481–486.
Crossref Google Scholar
[10]
J-M Wu, W Lei, X-H Wang, et al. Ba0.6Sr0.4TiO3–MgO ceramic powders with uniform microstructures prepared by aqueous gelcasting-assisted solid-state method. J Am Ceram Soc 2012, 95: 1960–1964.
Crossref Google Scholar
[11]
X Mao, S Shimai, M Dong, et al. Gelcasting and pressureless sintering of translucent alumina ceramics. J Am Ceram Soc 2008, 91: 1700–1702.
Crossref Google Scholar
[12]
J-M Wu, X-H Wang, Y-N Fan, et al. Microstructures and dielectric properties of Ba0.6Sr0.4TiO3–MgO ceramics prepared by non-aqueous gelcasting and dry pressing. Mater Res Bull 2011, 46: 2217–2221.
Crossref Google Scholar
[13]
J-M Wu, W-Z Lu, J Liang, et al. Microwave dielectric properties of 0.9Al2O3–0.1TiO2 ceramics prepared by aqueous gelcasting. J Inorgc Mater 2010, 26: 102–106.
Crossref Google Scholar
[14]
J Yang, J Yu, Y Huang. Recent developments in gelcasting of ceramics. J Am Ceram Soc 2011, 31: 2569–2591.
Crossref Google Scholar
[15]
W Wan, J Yang, J Zeng, et al. Effect of solid loading on gelcasting of silica ceramics using DMAA. Ceram Int 2014, 40: 1735–1740.
Crossref Google Scholar
[16]
K Prabhakaran, A Melkeri, NM Gokhale, et al. Direct coagulation casting of YSZ powder suspensions using MgO as coagulating agent. Ceram Int 2009, 35: 1487–1492.
Crossref Google Scholar
[17]
TJ Graule, LJ Gauckler, FH Baader. Direct coagulation casting—A new green shaping technique. Part. 1. Processing principles. Industrial Ceramics 1996, 16: 31–34.
Google Scholar
[18]
LJ Gauckler, Th Graule, F Baader. Ceramic forming using enzyme catalyzed reactions. Mater Chem Phys 1999, 61: 78–102.
Crossref Google Scholar
[19]
B Balzer, MKM Hruschka, LJ Gauckler. In situ rheological investigation of the coagulation in aqueous alumina suspensions. J Am Ceram Soc 2001, 84: 1733–1739.
Crossref Google Scholar
[20]
J Yang, Y Huang, LP Meier, et al. Direct coagulation casting via increasing ionic strength. Key Eng Mater 2002, 224–226: 631–636.
Crossref Google Scholar
[21]
J Xu, M Yang, K Gan, et al. Enhanced piezoelectric properties of PZT ceramics prepared by direct coagulation casting via high valence counterions (DCC–HVCI). Ceram Int 2016, 42: 2821–2828.
Crossref Google Scholar
[22]
SB Hall, JR Duffield, DR Williams. A reassessment of the applicability of the DLVO theory as an explanation for the Schulze–Hardy rule for colloid aggregation. J Colloid Interface Sci 1991, 143: 411–415.
Crossref Google Scholar
[23]
KE Verrall, P Warwick, AJ Fairhurst. Application of the Schulze–Hardy rule to haematite and haematite/humate colloid stability. Colloid Surf A 1999, 150: 261–273.
Crossref Google Scholar
[24]
A-N Chen, J-M Wu, M-Y Liu, et al. Rapid in-situ solidification of SiO2 suspension by direct coagulation casting via controlled release of high valence counter ions from calcium iodate and pH shift. Ceram Int 2017, 43: 1930–1936.
Crossref Google Scholar
[25]
A-N Chen, J-M Wu, H Xiao, et al. Rapid and uniform in-situ solidification of alumina suspension via a non-contamination DCC–HVCI method using MgO sintering additive as coagulating agent. Ceram Int 2017, 43: 9926–9933.
Crossref Google Scholar
[26]
J Xu, K Gan, M-H Yang, et al. Direct coagulation casting of yttria-stabilized zirconia using magnesium citrate and glycerol diacetate. Ceram Int 2015, 41: 5772–5778.
Crossref Google Scholar
[27]
J Xu, Y Zhang, Y Qu, et al. Direct coagulation casting of alumina suspension from calcium citrate assisted by pH shift. J Am Ceram Soc 2014, 97: 1048–1053.
Crossref Google Scholar
[28]
J Xu, N Wen, H Li, et al. Direct coagulation casting of alumina suspension by high valence counter ions using Ca(IO3)2 as coagulating agent. J Am Ceram Soc 2012, 95: 2525–2530.
Crossref Google Scholar
[29]
J Xu, N Wen, F Qi, et al. Direct coagulation casting of positively charged alumina suspension by controlled release of high valence counter ions from calcium phosphate. J Am Ceram Soc 2012, 95: 2155–2160.
Crossref Google Scholar
[30]
BW Hakki, PD Coleman. A dielectric resonator method of measuring inductive capacities in the millimeter range. IRE Trans MTT 1960, 8: 402–410.
Crossref Google Scholar
[31]
PC Hidber, TJ Graule, LJ Gauckler. Citric acid—A dispersant for aqueous alumina suspensions. J Am Ceram Soc 1996, 79: 1857–1867.
Crossref Google Scholar
[32]
H Xiao, J-M Wu, A-N Chen, et al. Alumina fiber-reinforced silica matrix composites with improved mechanical properties prepared by a novel DCC–HVCI method. Ceram Int 2017, 43: 16436–16442.
Crossref Google Scholar
[33]
ML Li. Concise Handbook of Chemical Data. Beijing: Chem. Ind. Press, 2003.
Journal of Advanced Ceramics
Volume 7 Issue 2,
June 2018
Pages 152-159
DOI: 10.1007/s40145-018-0266-4
Cite this article:
WU J-M, XIAO H, LIU M-Y, et al. Study of 0.9Al2O3–0.1TiO2 ceramics prepared by a novel DCC-HVCI method. Journal of Advanced Ceramics, 2018, 7(2): 152-159. https://doi.org/10.1007/s40145-018-0266-4

968

Views

23

Downloads

11

Crossref

N/A

Web of Science

11

Scopus

0

CSCD

Altmetrics
Received: 31 December 2017
Revised: 03 March 2018
Accepted: 05 March 2018
Published: 28 March 2018
© The author(s) 2018

Open Access The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Return