Guangdong Fenghua Advanced Technology Holding Co., Ltd.

Shiwo Ta

Zhenxiao Fu

Tao Chen

Xiuhua Cao

Terry James Frankcombe

Yun Liu

Kun Huang

Haidong Ren

Kai Cheng

Dehong Chen

Luwei Fu

Chunyuan Hu

Jianmei Liu

Zhe Song

Xiaozhou Wang

Joanna Chu

Lasse Noren

An LTCC microwave dielectric material, including the following components: a BaSiO+(1−a) (MgCaSrBa)WO+Ba—B—Si glass; wherein 0.4≤a≤0.8, 0≤x≤1, 0≤y≤1, 0≤z≤1. By adjusting the amounts of BaSiOand (MgCaSrBa)WO, the temperature coefficient of resonance frequency can be adjusted to nearly zero. The material is suitable for the fields of high-frequency communication and radiofrequency. Also disclosed is a method for preparing the LTCC microwave dielectric material.

LTCC microwave dielectric material and preparation method thereof

Disclosed is a low temperature co-fired dielectric material with an adjustable dielectric constant, wherein it comprises a zirconia main phase and a silicon-based amorphous filler, a weight ratio of the zirconia main phase to the silicon-based amorphous filler is 40-65:35-60; a weight percentage of SiOin the silicon-based amorphous filler is ≥50%. The dielectric constant of low temperature co-fired dielectric material can be continuously adjusted in a wide range of 7-12, the dielectric loss can be as low as 0.1% at 1 MHz. The material system can be sintered at 800-900° C. and co-fired with silver electrode. It can be used as the low temperature co-fired dielectric material. The invention also discloses a method for preparing the low temperature co-fired dielectric material with an adjustable dielectric constant.

Low temperature co-fired dielectric material and preparation method thereof

The present invention discloses a multiphase ceramic material with a giant dielectric constant, wherein the multiphase ceramic material has a general formula of ABTiO; wherein A is at least one selected from the group consisting of Nb, Ta, V, Mo, and Sb, B is at least one selected from the group consisting of In, Ga, Al, Co, Cr, Sc, Fe (III), and a trivalent rare-earth cation; n is a molar ratio of B to A, 1<n≤5, 0<x≤0.1. The multiphase ceramic material possesses outstanding properties including a giant dielectric constant, a low dielectric loss, and excellent frequency- and temperature-stability. In particular, it exhibits a high insulation resistivity of higher than 10Ω·cm and a high breakdown voltage, which implies it can be applied in high-energy storage devices and supercapacitors. This invention also provides a method to synthesize the multiphase ceramic material.

Multiphase ceramic material with giant dielectric constant, and preparation method thereof

Disclosed herein is a doped perovskite barium stannate material, which has a chemical general formula of BaABSnO, where A is at least one of In, Y, Bi and La; B is at least one of Nb and Ta, and 0<x≤0.025. The doped perovskite barium stannate material disclosed in the invention has a high dielectric constant, low dielectric loss and good temperature-stability, and it can be used not only as low-frequency ceramic capacitor dielectrics, but also as microwave dielectric ceramics because of its excellent microwave dielectric properties, implying the potential application in the field of microwave communication. What's more, disclosed is a method to prepare the doped perovskite barium stannate material and the application of the doped perovskite barium stannate material in a low-frequency ceramic capacitor or microwave communication dielectric ceramics.

Doped perovskite barium stannate material with preparation method and application thereof

The disclosure relates to a Low Temperature Co-fired Ceramic (LTCC) substrate and a preparation method thereof, and in particular to a dielectric-constant-adjustable LTCC substrate and a preparation method thereof. The LTCC substrate of the disclosure includes the following components: glass, SiOand AlO, a weight percentage of the SiOin the LTCC substrate is 10% to 25%.

LTCC substrate and preparation method thereof

The present invention relates to a boroaluminosilicate mineral material, a low temperature co-fired ceramic composite material, a low temperature co-fired ceramic, a composite substrate and preparation methods thereof. A boroaluminosilicate mineral material for a low temperature co-fired ceramic, the boroaluminosilicate mineral material comprises the following components expressed in mass percentages of the following oxides: 0.41%-1.15% of Na2O, 14.15%-23.67% of K2O, 1.17%-4.10% of CaO, 0-2.56% of Al2O3, 13.19%-20.00% of BO, and 53.47%-67.17% of SiO. The aforementioned boroaluminosilicate mineral material is chemically stable; a low temperature co-fired ceramic prepared from it not only has excellent dielectric properties, but also has a low sintering temperature, a low thermal expansion coefficient, and high insulation resistance; it is also well-matched with the LTCC process and can be widely used in the field of LTCC package substrates.

Boron aluminum silicate mineral material, low temperature co-fired ceramic composite material, low temperature co-fired ceramic, composite substrate and preparation methods thereof

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Guangdong, China

Shiwo Ta