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Wide-temperature range negative temperature coefficient heat-sensitive ceramic material and preparation method thereof

A technology of negative temperature coefficient and heat-sensitive ceramics, which is applied in the field of BaTiO3-based negative temperature coefficient heat-sensitive ceramic materials and its preparation, wide temperature range negative temperature coefficient heat-sensitive ceramic materials and its preparation, and can solve the problem of limited application range and temperature measurement. Narrow zone and other problems, to achieve the effect of wide measurement temperature zone, guarantee material performance, and prevent stoichiometric ratio mismatch

Active Publication Date: 2018-09-18
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

At the same time, the temperature sensing element can also be prepared by using the PTC characteristics of the material above the Curie temperature, but the measurement temperature range of this thermal sensor is very narrow (generally room temperature to 100°C), and the application range is limited. A few fields such as control and control have been applied

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  • Wide-temperature range negative temperature coefficient heat-sensitive ceramic material and preparation method thereof
  • Wide-temperature range negative temperature coefficient heat-sensitive ceramic material and preparation method thereof
  • Wide-temperature range negative temperature coefficient heat-sensitive ceramic material and preparation method thereof

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[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0046] Wide temperature zone NTC thermosensitive ceramic material of the present invention, its raw material is composed of:

[0047] (1-x-y)BaTiO 3 +(x+y)TiO 2 +vM 1 O+wM 2 O+xM 3 O+y(M 4 O+M 5 O)(I)

[0048] In the formula (I), v=0.1-0.5; w=1.0-5.0; x=0-40.0; y=0.1-10.0; all corresponding to molar ratio content.

[0049] M in composition 1 It is at least one element such as Sm, Nd, Y...

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Abstract

The invention discloses a wide-temperature range negative temperature coefficient heat-sensitive ceramic material and a preparation method thereof. Raw materials of the negative temperature coefficient heat-sensitive ceramic material comprise BaTiO3, TiO2, M1O, M2O, M3O, M4O and M5O, wherein M1 is at least one of Sm, Nd, Y, La and Nb elements; M2 is at least two of Si, Al and Ti elements; M3 is acombination of the Ca element and at least one of Sr and Pb elements; M4 is at least one of Sb and Bi elements; and M5 is at least one of Na, K and Li elements. The barium titanate-based wide-temperature range NTC heat-sensitive ceramic material with the measuring temperature range being 300 DEG C or more is obtained through improving and further optimizing the key composition components of the ceramic material and the whole process flow and condition parameters in all reaction steps of the corresponding preparation method and doping and modifying a barium titanate-based semiconductor heat-sensitive ceramic.

Description

technical field [0001] The invention belongs to the technical field of functional ceramic materials, more specifically, relates to a wide temperature zone negative temperature coefficient heat-sensitive ceramic material and a preparation method thereof, especially a BaTiO 3 The invention relates to a negative temperature coefficient (NTC) thermosensitive ceramic material and a preparation method thereof. Background technique [0002] Typical NTC thermosensitive ceramics are mostly semiconductor ceramic materials based on transition metal oxides such as manganese, cobalt, and nickel. The characteristic is that the resistivity of the material decreases exponentially with the increase of the ambient temperature, resulting in a negative resistance temperature ( NTC) characteristics. Various temperature sensors can be made by using this kind of ceramic material, which has a series of advantages such as simple structure, low cost, safety and reliability, and is widely used in var...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/626C04B35/64
CPCC04B35/468C04B35/62605C04B35/64C04B2235/3201C04B2235/3203C04B2235/3208C04B2235/3213C04B2235/3217C04B2235/3224C04B2235/3225C04B2235/3227C04B2235/3232C04B2235/3251C04B2235/3296C04B2235/3418
Inventor 傅邱云周东祥
Owner HUAZHONG UNIV OF SCI & TECH
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