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1.特点厚膜热敏电阻是国外从60年代末期开始研制的新型热敏元件,近年来其性能和品种有了很大发展和提高,并在自动控制、空间技术、微波通讯、医疗环保、家用电器等领域显示出日益广泛的应用前景。厚膜热敏电阻与普通热敏电阻相比,具有如下特点:(1)工艺性好、生产效率高。(2)结构设计灵活性高,材料选择范围宽,因而可以在相当宽的范围内调整特性参数。(3)平面结构,便于进行阻值调整,阻值精度和互换性好。(4)容易进行玻璃包封,有利于提高元件的稳定性和可靠性。(5)能与其它厚膜元件、集成电路和信号处理单元混合,发展混合集成多功能敏感器。2.组成与微观结构厚膜热敏电阻是将阻值随温度变化很大的过渡金属的复合氧化物半导体与玻璃和金属等导电成分均匀混合,制成浆料,在氧化铝基片上按厚膜工艺
1. Features Thick-film thermistor is a new type of thermal element developed abroad from the late 1960s. In recent years, its performance and variety have been greatly improved and developed. In the fields of automatic control, space technology, microwave communication, medical environmental protection, Household appliances and other fields show an increasingly wide range of applications. Thick-film thermistor compared with the ordinary thermistor, has the following characteristics: (1) technology is good, high production efficiency. (2) high structural design flexibility, wide range of material options, which can be adjusted within a very wide range of characteristic parameters. (3) flat structure, easy to adjust resistance, resistance accuracy and interchangeability. (4) easy to glass encapsulation, help to improve the stability and reliability of components. (5) Can be mixed with other thick film components, integrated circuits and signal processing units to develop hybrid integrated multi-function sensors. 2. Composition and microstructure Thick-film thermistor is a resistance value changes with temperature transition metal compound oxide semiconductor and glass and metal and other conductive components are uniformly mixed to form a slurry, the thickness of the alumina substrate by thick Membrane technology