公开(公告)号：US3924098A

公开(公告)日：1975-12-02

申请号：US42107373

申请日：1973-12-03

Applicant: BJORKSTEN RESEARCH LAB INC

Inventor： DUNN STANLEY AUSTIN

IPC: H05B3/14 ,  H05B3/28 ,  F24H9/02

CPC classification number: H05B3/14 ,  H05B3/283 ,  Y10T29/49083 ,  Y10T29/49101

Abstract: A heating element is cast, extruded or formed from a composition comprising finely comminuted ferrous metal in a matrix essentially consisting of a base composition consisting essentially of tailings muds from lithium ore extraction, comprising a major percentage of silicon, lesser percentages of aluminum and calcium, and to which some alkali metals or lead may be added in order to ease working and depress the melting point. An electrically conductive composition of controlled resistance is prepared in which the ferrous particles contact each other so as to give the resultant element resistivity of 10 3 to 1,000 Ohm centimeters. The tailings mud is a by-product from ore extraction, which is particularly suitable for this purpose because of its fine state of comminution, and its workability.

Abstract translation: 加热元件由包含基本上由基本上由锂矿石提取的尾矿泥组成的基础组合物的基质中包含精细粉碎的亚铁金属的组合物浇铸，挤出或形成，其包含主要百分比的硅，较少百分比的铝和钙， 并且可以加入一些碱金属或铅以便于加工和降低熔点。