Microwave Dielectric Properties and Crystal Structure of Y2(Ba1-xSrx)(Cu1-yZny)O5Solid Solutions Synthesized by a Solid-State Reaction Method

2000 ◽  
Vol 39 (Part 1, No. 9B) ◽  
pp. 5654-5657 ◽  
Author(s):  
Akinori Kan ◽  
Hirotaka Ogawa ◽  
Hitoshi Ohsato ◽  
Soichi Ishihara
Keyword(s):  
Crystal Structure ◽  
Dielectric Properties ◽  
Solid State ◽  
Solid State Reaction ◽  
Microwave Dielectric Properties ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
Microwave Dielectric

The Effect CuO Additive on the Microwave Dielectric Properties of Mg(Zr0.05Ti0.95)O3 Ceramics

2011 ◽  
Vol 687 ◽  
pp. 199-203 ◽  
Author(s):  
Ching Fang Tseng
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Solid State ◽  
Liquid Phase ◽  
Solid State Reaction ◽  
Microwave Dielectric Properties ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
Microwave Dielectric ◽  
Second Phases

The microwave dielectric properties of the Mg(Zr0.05Ti0.95)O3ceramics with CuO addition were investigated. All specimens were prepared by solid-state reaction method and sintered at 1270-1420°C for 4 h. When CuO was added, the second phases of MgTi2O5, TiO2and liquid phase were produced. For specimens with 1.5 wt% CuO sintered at 1300°C, the dielectric constant,Q´fand tfvalues are 18.2, 223000 GHz and -2 ppm/°C, respectively.

Novel sintering and band gap engineering of ZnTiO3 ceramics with excellent microwave dielectric properties

2017 ◽  
Vol 5 (16) ◽  
pp. 4040-4047 ◽  
Author(s):  
Shenhui Lei ◽  
Huiqing Fan ◽  
Xiaohu Ren ◽  
Jiawen Fang ◽  
Longtao Ma ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Solid State ◽  
Microwave Dielectric Properties ◽  
Solid State Reaction Method ◽  
Band Gap Engineering ◽  
Reaction Method ◽  
Microwave Dielectric ◽  
Pure Phase ◽  
First Time ◽  
Zntio3 Ceramics

Pure phase ZnTiO3 ceramics were successfully synthesized for the first time by a solid state reaction method.

Preparation and Microwave Dielectric Properties of Ca(Sm0.5Nb0.5)O3 Ceramics

2012 ◽  
Vol 512-515 ◽  
pp. 1198-1202
Author(s):  
Jia Mao Li ◽  
Tai Qiu
Keyword(s):  
Dielectric Properties ◽  
Solid State ◽  
Cooling Rate ◽  
Sintering Temperature ◽  
Microwave Dielectric Properties ◽  
Solid State Reaction Method ◽  
Sintering Process ◽  
Conventional Solid State Reaction ◽  
Reaction Method ◽  
Microwave Dielectric

Microstructures and microwave dielectric properties of Ca(Sm0.5Nb0.5)O3 ceramics, prepared by a conventional solid-state reaction method, were systematically investigated by varying calcining temperature, sintering temperature and cooling rate. The XRD result showed that a single Ca(Sm0.5Nb0.5)O3 phase could be synthesized at a calcining temperature of 1200 °C. Optimized combination of microwave dielectric properties of εr = 22.36, Q×f = 18030 GHz and τf = -31.2 ppm/°C was obtained for furnace-cooled Ca(Sm0.5Nb0.5)O3 ceramics sintered at 1550 °C for 4 h. However, some microcracks were found from the microstructures of the furnace-cooled specimens. Further, the Q×f value could be increased by controlling the cooling rate during the sintering process due to the disappearance of microcracks in the final material. With a cooling rate of 2 °C/min, Ca(Sm0.5Nb0.5)O3ceramics exhibited an enhanced Q×f value of 37130 GHz.

Influence of Ta substitution for Nb in Zn3Nb2O8 and the impact on the crystal structure and microwave dielectric properties

2016 ◽  
Vol 45 (29) ◽  
pp. 11807-11816 ◽  
Author(s):  
Yonggui Zhao ◽  
Ping Zhang
Keyword(s):  
Crystal Structure ◽  
Dielectric Properties ◽  
Solid State ◽  
Solid State Reaction ◽  
Structural Characteristics ◽  
Microwave Dielectric Properties ◽  
Reaction Route ◽  
Microwave Dielectric ◽  
Solid State Reaction Route ◽  
The Impact

Zn3(Nb1−xTax)2O8 (x = 0.02–0.10) ceramics were prepared via a solid-state reaction route and the dependence of their microwave dielectric properties on their structural characteristics were investigated.

Phase composition, crystal structure, infrared reflectivity and microwave dielectric properties of temperature stable composite ceramics (scheelite and zircon-type) in BiVO4–YVO4 system

2015 ◽  
Vol 3 (11) ◽  
pp. 2582-2588 ◽  
Author(s):  
Di Zhou ◽  
Wen-Bo Li ◽  
Hai-Hong Xi ◽  
Li-Xia Pang ◽  
Guang-Sheng Pang
Keyword(s):  
Crystal Structure ◽  
Phase Composition ◽  
Dielectric Properties ◽  
Microwave Dielectric Properties ◽  
Solid State Reaction Method ◽  
Composite Ceramics ◽  
Reaction Method ◽  
Microwave Dielectric ◽  
System P ◽  
Zircon Type

(1 − x)BiVO4–xYVO4 (x ≤ 0.65) ceramics were prepared using the solid state reaction method. Bi–O oscillations were proved to dominate the microwave dielectric polarizations.

Effects of Mg2+ on Microstructure and Microwave Dielectric Properties of La2/3TiO3 Ceramics

2007 ◽  
Vol 280-283 ◽  
pp. 35-38 ◽  
Author(s):  
Ai Min Yang ◽  
Wei Chen ◽  
Lan Luo
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Solid State ◽  
Resonant Frequency ◽  
Microwave Dielectric Properties ◽  
Solid State Reaction Method ◽  
Conventional Solid State Reaction ◽  
Reaction Method ◽  
Microwave Dielectric ◽  
Maximum Permittivity

(1-x)La2/3TiO3-xLa(Mg1/2Ti1/2)O3 ceramics with x ranging from 0.01 to 0.3 were prepared by the conventional solid-state reaction method. Microstructure and microwave dielectric properties were studied. The perovskite compound La2/3TiO3 is stabilized when x = 0.1. The content of La2/3TiO3 increases with increasing x from 0.01 to 0.1, and thereafter decreases when x > 0.1. The same tendency was also observed on measuring the dielectric constant, temperature coefficient of resonant frequency and Q× ƒ. A maximum permittivity of 77.35 was achieved with these stabilized La2/3TiO3 ceramics. Close to zero τf value (1 ppm/°C) was obtained at x=0.3, but its Q× ƒ value was relative low.

Thermal enhancement of 2H11/2→4I15/2 up-conversion luminescence of Er3+ doped K2Yb(PO4)(MoO4) phosphors

2021 ◽  
Author(s):  
Hongqiang Cui ◽  
Yongze Cao ◽  
Lei Zhang ◽  
Yuhang Zhang ◽  
Siying Ran ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
X Ray Diffraction ◽  
Orthorhombic Crystal ◽  
Orthorhombic Crystal Structure ◽  
Reaction Method ◽  
X Ray ◽  
Thermal Enhancement

Er3+ with different concentrations doped K2Yb(PO4)(MoO4) phosphors were prepared by a solid-state reaction method, and the layered orthorhombic crystal structure of the samples was confirmed by X-ray diffraction (XRD). Under...

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