摘要:
An improved electric resistance heating element made of a carbon material, provided around its surface with a layer essentially comprising carbon fiber, and an improved electric resistance heating furnace using the heating element.
摘要:
A process for producing a carbon fabric wherein a fabric, which is made of an acrylonitrile polymer fiber having a fusing temperature (T.sub.f) of at least 310.degree. C. and exhibits a free areal shrinkage of not larger than 50%, is heated in an active gas atmosphere under conditions such that shrinkage of the fabric is permitted, thereby to be stablized, and then, the fabric is carbonized in an inactive gas atmosphere.
摘要:
Organic fibrous material is changed to heat-stabilized material by heating in an atmosphere, and then the heat-stabilized material is carbonized in a carbonizing furnace at a temperature of from about 800.degree.C to 1600.degree.C.When temperature at any given point in the furnace is plotted on a vertical axis and the particular location along the length of the carbonizing furnace is plotted on a horizontal axis, the slope of the resulting temperature profile above 800.degree.C either remains constant or decreases until the maximum temperature in the furnace is reached.
摘要:
Agents containing polyaniline of one or more specified kinds shown by Formulas (1)-(4) given below can generate active oxygen efficiently and economically when contacted with a liquid having oxygen dissolved therein: ##STR1## where A is a negative ion, n is an integer between 2 and 5000, x and y are numbers such that x+y=1 and 0.ltoreq.y.ltoreq.0.5.
摘要翻译:含有以下给出的式(1) - (4)所示的一种或多种特定种类的聚苯胺的试剂可以在与溶解有氧气的液体接触时有效且经济地产生活性氧:图像(1)公式(3)式(4)其中A为负离子,n为2至5000之间的整数,x和y为x + y = 1的数字 和0
摘要:
Provided is a process for producing a carbon fabric composed of carbon fibers having improved tensile strength and modulus of elasticity from a precursor fabric made of an acrylonitrile polymer fiber. The acrylonitrile polymer fiber used has a fusing temperature of at least 310.degree. C., contains not more than 0.1 wt. % of a residual solvent, and is prepared by a process wherein an acrylonitrile polymer comprised of at least 94 wt. % of acrylonitrile and not more than 6 wt. % of another comonomer and having an intrinsic viscosity of 1.4-2.3 is spun into filaments and then the filaments are stretched at a total stretching ratio of at least 6. The fiber of the fabric woven therefrom is treated with a transition metal-containing compound. The precursor fabric exhibits a free areal shrinkage of not more than 50% and has a weight per unit area falling within the specified range. The precursor fabric is heated in an oxidizing gas atmosphere at 200.degree.-400.degree. C. under conditions such that the fabric is permitted to shrink by at least 80% of the free areal shrinkage, and then, carbonized at at least 700.degree. C. in a non-oxidizing atmosphere.
摘要:
Agents containing polyaniline or derivative of polyaniline of one or more specified kinds shown by Formulas (1)-(4) given below can generate active oxygen when contacted with an oxygen-containing gas: where A is a negative ion, x and y are positive numbers such that x+y=1 and n is a positive integer between 2 and 1000.
摘要翻译:含有下述式(1) - (4)所示的聚苯胺或聚苯胺衍生物的试剂可以在与含氧气体接触时产生活性氧:其中A为负离子,x和y为正 数字,使得x + y = 1,n是2和1000之间的正整数。