Preparation method and application of lead magnesium niobate-lead titanate dielectric ceramic material with low loss and high dielectric constant
A high dielectric constant, lead magnesium niobate technology, applied in the field of functional ceramics, can solve the problems of patients' skin discomfort, ceramic electrode heating, etc., and achieve the effect of uniform grain size and compact fracture
Inactive Publication Date: 2022-04-15
SENBA SENSING TECH CO LTD
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Problems solved by technology
[0004] In addition, since ceramic electrode tiles need to apply a certain intensity of electric field during work, the ceramic electrode will heat up due to the dielectric loss of the dielectric material or the pores and impurities introduced during the preparation process, which increases the possibility of skin burns for patients. Or cause the patient's skin discomfort, so find a way to reduce the manufacturing defects and dielectric loss of the dielectric material
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Embodiment 2
[0051] 1. Mixing: Use an electronic balance with an error accuracy of 0.05g to weigh PbO, Nb2O5, MgCO3, and TiO2, of which PbO is 116.5g, MgO is 15.6g, Nb2O5 is 41.0g, and TiO2 is 3.0g. Put it into a ball mill tank, in which the mass ratio of raw materials, dispersant, deionized water, and zirconium balls is about 1:0.5%:0.6-0.8:4-6, choose zirconia balls with a diameter of 3-10mm, and ball mill for 16-24h , drying in an oven at 120°C.
[0052] 2. Pre-firing synthesis: The dried ceramic cake is sieved with a 60-mesh nylon sieve, and then the powder is kept at 800-900°C for 2-4 hours.
[0053] 3. Secondary grinding: crush the pre-fired powder, add PMN-PT ceramic powder in proportion, sintering modification additives such as SrCO3, Bi2O3, Y2O3, Dy2O3 and other rare earth oxides, deionized water, dispersant, binder , Ball milling for 16-24h, wherein the addition ratio of sintering aid is below 0.2wt%, and the addition ratio of rare earth oxide is below 0.5wt%.
[0054] 4. The c...
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Abstract
The invention relates to the technical field of functional ceramics, and discloses a preparation method and application of a low-loss high-dielectric-constant lead magnesium niobate-lead titanate dielectric ceramic material, a PMN-PT relaxation ferroelectric ceramic material is included, the chemical structural formula of the PMN-PT relaxation ferroelectric ceramic material is xPb (Mg1 / 3Nb2 / 3)-yPbTiO3 (hereinafter referred to as PMN-PT), x is greater than or equal to 0.9 and less than or equal to 1.0, y is greater than or equal to 0 and less than or equal to 0.1, and x + y is equal to 1.0, according to the PMN-PT relaxor ferroelectric ceramic material, y is more than or equal to 0.05 and less than or equal to 0.1, the used raw materials are electronic-grade PbO, TiO2, MgCO3 and Nb2O5, red lead and yellow lead can be used for introducing the PbO, and magnesium salts such as MgO, Mg (OH) 2 and the like can be adopted for introducing the MgCO3. According to the preparation method and application of the low-loss high-dielectric-constant lead magnesium niobate-lead titanate dielectric ceramic material, PMN-PT ceramic fracture prepared by the preparation method is compact, the grain size is uniform, the grain size is 3-5 microns, the Curie point of the ceramic material is adjustable at 0-40 DEG C, and the Curie point moves towards the high temperature direction along with the increase of the lead titanate content.
Description
technical field [0001] The invention relates to the technical field of functional ceramics, in particular to a method for preparing a low-loss high-dielectric constant lead magnesium niobate-lead titanate dielectric ceramic material and its application. Background technique [0002] With the rapid development of science and technology, people have conducted in-depth research on the growth and division mechanism of malignant tumors, and proposed new treatment options to improve the survival rate and quality of life of terminally ill patients. Electric field therapy is an emerging non-invasive physical therapy for tumors in recent years. It transmits a low-strength alternating electric field to the lesion in the body through an externally applied ceramic electrode sheet, thereby inhibiting and destroying the growth of tumor cells in a state of rapid division. Due to the use of large-capacity batteries, the treatment equipment can be worn on the human body. It is a portable, ef...
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IPC IPC(8): C04B35/499C04B35/622
Inventor 白旭春杜炳纯常飞张殿德魏崇耿青坤
Owner SENBA SENSING TECH CO LTD