MALCOLM E WASHBURN
Engineering in Princeton, MA
License number
Massachusetts 11623
Expiration Date
Jun 30, 1992
Type
Chemical Engineer
Address
Address
Princeton, MA 01541
Personal information
See more information about MALCOLM E WASHBURN at radaris.comName
Address
Phone
Princeton, MA
Mirick Rd, Princeton, MA 01541
260 Mirick Rd, Princeton, MA 01541
Professional information
High Strength Nitride Bonded Silicon Carbide Refractories
US Patent:
4937211, Jun 26, 1990
Filed:
Nov 4, 1987
Appl. No.:
7/117182
Inventors:
Malcolm E. Washburn - Princeton MA
Assignee:
Norton Company - Worcester MA
International Classification:
C04B 3556, C04B 3558
US Classification:
501 92
Abstract:
An improved silicon nitride bonded silicon carbide refractory is disclosed. The improvement results from coating the silicon carbide grains with, or introducing into the bond during the mix preparation step, zirconium orthosulfate. The resulting product has higher moduli of rupture and elasticity as compared to prior art compositions where zirconia is introduced into the bond.
Porous Silicon Oxynitride Refractory Shapes
US Patent:
4069058, Jan 17, 1978
Filed:
Nov 10, 1976
Appl. No.:
5/740357
Inventors:
Malcolm E. Washburn - Princeton MA
Assignee:
Norton Company - Worcester MA
International Classification:
C04B 3558
US Classification:
106 55
Abstract:
A porous refractory body is formed by bonding Si. sub. 2 ON. sub. 2 grain or other suitable refractory grain with fine crystals of Si. sub. 2 ON. sub. 2 formed in situ by firing a shaped body under nitridation conditions. The body has an open pore structure, is resistant to the constituents of an aluminum chloride electrolysis cell and has good structural strength.
Refractory Electrical Device
US Patent:
5045237, Sep 3, 1991
Filed:
Oct 14, 1988
Appl. No.:
7/258307
Inventors:
Malcolm E. Washburn - Princeton MA
Assignee:
Norton Company - Worcester MA
International Classification:
H01B 118
US Classification:
252516
Abstract:
The present invention is an electrical device made up of a mixture of silicon carbide and molybdenum disilicide, and may include silicon nitride or aluminum nitride or boron nitride. An electrical device is also disclosed which is particularly suited for use as an igniter in liquid and gas fuel burning systems. The device is made up of a sintered, preferably hot-pressed, mixture of fine powders of aluminum nitride or silicon nitride, silicon carbide and molybdenum disilicide where, when all three are present, they are present in substantial quantities.
Refractory Bodies For Corrosive Environments
US Patent:
4483932, Nov 20, 1984
Filed:
Nov 7, 1983
Appl. No.:
6/549114
Inventors:
Malcolm E. Washburn - Princeton MA
Charles W. Taylor - Clinton MA
Charles W. Taylor - Clinton MA
Assignee:
Norton Company - Worcester MA
International Classification:
C04B 3504, C04B 3512
US Classification:
501117
Abstract:
The gasification of coal can be accomplished more efficiently if it is operated at a temperature high enough so that the mineral constituents of the coal will form a molten slag which can be continuously removed from the gasifier during operation. Proper control of such a process requires careful temperature control, but the molten coal slag has been found to be corrosive to most thermocouple materials and to conventional refractory ceramics which are used as thermocouple protection tubes in other environments. It has now been found that magnesium chromite serves satisfactorily as a corrosion resistant refractory material in molten coal slags, and that thermocouple protection tubes of this material can be made by isostatic pressing of granular magnesium chromite and subsequent firing.
Reaction Bonded Silicon Nitride
US Patent:
4127630, Nov 28, 1978
Filed:
Dec 3, 1975
Appl. No.:
5/637211
Inventors:
Malcolm E. Washburn - Princeton MA
Assignee:
Norton Company - Worcester MA
International Classification:
C04B 3558
US Classification:
264 65
Abstract:
A new form of reaction bonded silicon nitride is described along with the process of making this new product. The product is characterized by isotropic structure, extremely fine pore and grain size, high strength and a high ratio of alpha silicon nitride to beta silicon nitride. The product has a density of at least 2. 45 grams/cc and is essentially free of pores greater than 15 microns.
Refractory Electrical Device
US Patent:
5085804, Feb 4, 1992
Filed:
Feb 25, 1991
Appl. No.:
7/659648
Inventors:
Malcolm E. Washburn - Princeton MA
Assignee:
Norton Company - Worcester MA
International Classification:
H01B 118
US Classification:
252516
Abstract:
The present invention is an electrical device made up of a mixture of silicon carbide and molybdenum disilicide, and may include silicon nitride or aluminum nitride or boron nitride. An electrical device is also disclosed which is particularly suited for use as an igniter in liquid and gas fuel burning systems. The device is made up of a sintered, preferably hot-pressed, mixture of fine powders of aluminum nitride or silicon nitride, silicon carbide and molybdenum disilicide where, when all three are present, they are present in substantial quantities.
High Density Silicon Oxynitride
US Patent:
4331771, May 25, 1982
Filed:
May 12, 1980
Appl. No.:
6/148853
Inventors:
Malcolm E. Washburn - Princeton MA
Assignee:
Norton Company - Worcester MA
International Classification:
C04B 3558
US Classification:
501 97
Abstract:
A reaction bonded silicon oxynitride product having a density of 85 to 95% of theoretical density, a degree of density heretofore not attainable by sintering or reaction bonding. Such high densities are attained by nitriding, in an oxygen free atmosphere ultra fine silicon and ultra fine silica in the presence of certain reaction aids. The particle size of the silicon powder must be at least as fine as about 3 microns and the silica as fine as about 0. 3 microns.
Lightweight Silicon Oxynitride
US Patent:
4043823, Aug 23, 1977
Filed:
Jul 21, 1975
Appl. No.:
5/597821
Inventors:
Malcolm E. Washburn - Princeton MA
Stephen D. Hartline - Shrewsbury MA
Stephen D. Hartline - Shrewsbury MA
Assignee:
Norton Company - Worcester MA
International Classification:
C04B 3548
US Classification:
106 40R
Abstract:
A lightweight insulating refractory shape is made of Si. sub. 2 ON. sub. 2 having a density of less than 50% of theoretical, a relatively high compressive strength, a low thermal conductivity and high resistance to attack by chlorine, fused chlorides and molten aluminum.
Self Heated Sensor Package
US Patent:
4935118, Jun 19, 1990
Filed:
Mar 21, 1986
Appl. No.:
6/842453
Inventors:
Anil K. Agarwal - Camarillo CA
Joseph N. Panzarino - Northboro MA
Malcolm E. Washburn - Princeton MA
Joseph N. Panzarino - Northboro MA
Malcolm E. Washburn - Princeton MA
Assignee:
Norton Company - Worcester MA
International Classification:
G01N 2746
US Classification:
204421
Abstract:
An oxygen sensing package includes a solid electrolyte sensor and a silicon carbide heating element arranged so as to surround the solid electrolyte and radiate heat to it from convex surfaces. n.
Refractory Cement
US Patent:
4476234, Oct 9, 1984
Filed:
Aug 12, 1983
Appl. No.:
6/522916
Inventors:
Cecil M. Jones - Worcester MA
Malcolm E. Washburn - Princeton MA
Louis J. Trostel - Princeton MA
Malcolm E. Washburn - Princeton MA
Louis J. Trostel - Princeton MA
Assignee:
Norton Company - Worcester MA
International Classification:
C04B 3558
US Classification:
501 89
Abstract:
A novel raw batch and improved fired refractory cement is described. A bulk refractory grain mass is initially bonded with a fired bond, which upon being fired includes Si. sub. 3 N. sub. 4 and/or Si. sub. 2 ON. sub. 2 reaction component that better protects the ultimate high temperature sintered cement product from erosion when the cement is used as a liner for furnace walls, troughs, and runners that contain a flow of molten iron or slag, as well as induction furnaces which process corrosive slag.