Positive temperature coefficient X7R ceramic dielectric material and preparation method thereof

The invention belongs to the technical field of ceramic dielectric materials, aims to solve the problem that the capacitance temperature coefficient of a current X7R ceramic dielectric material is inthe range of -55 DEG C to 125 DEG C positively and negatively and changes constantly, provides a posi...

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Bibliographic Details
Main Authors LI JIANGDAN, GUO YAJING, ZHANG YONGQIANG
Format Patent
LanguageChinese
English
Published 08.03.2019
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:The invention belongs to the technical field of ceramic dielectric materials, aims to solve the problem that the capacitance temperature coefficient of a current X7R ceramic dielectric material is inthe range of -55 DEG C to 125 DEG C positively and negatively and changes constantly, provides a positive temperature coefficient X7R ceramic dielectric material and a preparation method thereof. Thepositive temperature coefficient X7R ceramic dielectric material comprises the following components in percentages by weight: 10% to 30% of MgTiO3 and 70% to 90% of Na2Sr4Nb9.78O29.45. According withthe X7R standard, the X7R ceramic dielectric material has the characteristics of high dielectric constant, low dielectric loss and positive temperature coefficient. The X7R ceramic dielectric materialis of a square tungsten bronze structure and has Curie peaks in the range of -55 DEG C to 125 DEG C, and a part of Mg<2+> is solidly dissolved in the structure by substituting Nb<5+>, so that the Curie peaks are effectively red
Bibliography:Application Number: CN201811360673