UNCLASSIFIED AD NUMBER AD807978 NEW LIMITATION CHANGE TO Approved for public release, distribution unlimited FROM Distribution authorized to U.S. Gov't. agencies and their contractors; Critical Technology; MAY 1966. Other requests shall be referred to Air Force Rocket Propulsion Lab., Attn: RPPR-STINFO, Edwards AFB, CA 93523. AUTHORITY Air Force Rocket Propulsion Lab. ltr dtd 20 Dec 1971 THIS PAGE IS UNCLASSIFIED
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UNCLASSIFIED AD NUMBER - dtic. · PDF fileSieve Analysis of Coke Flour ... Ullrich comments that the electrical sensing-zone ... weight percent against the particle size range as is
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UNCLASSIFIED
AD NUMBER
AD807978
NEW LIMITATION CHANGE
TOApproved for public release, distributionunlimited
FROMDistribution authorized to U.S. Gov't.agencies and their contractors; CriticalTechnology; MAY 1966. Other requests shallbe referred to Air Force Rocket PropulsionLab., Attn: RPPR-STINFO, Edwards AFB, CA93523.
AUTHORITY
Air Force Rocket Propulsion Lab. ltr dtd20 Dec 1971
THIS PAGE IS UNCLASSIFIED
.. ADFO-29"ZrPARTICLE SIZE DISTRIBUTION BYELECTRICAL SENSING- ZONE COUNTER
Charles M. Stone, Lt, USAF
TEC!;qNCAL REPORT AFRPL-TR-66-300
November 1966
This document is subject to special export controls and each transmittalto foreign governments or foreign nationals may be made only with priorapproval of AFRPL (RPPR-STINFO), Edwards, California 93523.
AIR FORCE ROCKET PROPULSION LABORATORYRESEARCH AND TECHNOLOGY DIVMSON
AIR FORCE SYSTEMS COMMANDUNITED STATES AIR FORCE
EDWARDS, CALZFrOR.IA
ISC(LAIMKI NOTICK
THIS DOCUMENT IS BEST
QUALITY AVAILABLE. THE COPY
FURNISHED TO DTIC CONTAINED
A SIGNIFICANT NUMBER OF
PAGES WHICH DO NOT
REPRODUCE LEGIBLY.
17 0it D
,i:,rk <c ibed herein was performed in the Cherr.!,al and",tk.tO•iO• Branch of 4he Propellant Division at the -Air Fo.,•e Rocket
i'., i, Laboratory, during the period August 1964 to June 1965.k wait done under Project 3148 by Charles M. Stone, Lt,
, fPrjojeet Engineer. The author acknbwledges the editorial and•,<hni,-.'A a•j6itance given by Dr. Lawrence P. 0'.rAn and Mr. -Robert
,. •- ncroscopv assistance by Mrs. Ell ; beth Dalaba, and
~t•o, ir tp and operating assistance Lty Mr. Mike Citro.
, has been reviewed and app.-oved.
Colonel, USAFCommander, Air Force Rocket Propulsion Laboratory
1BEST AVAILABLE COPY
ABSTRACT
The objective of this study was to evaluate a method for the qualitycostrol of fine powders as an alternate method to that specified inMIl,-P-2?41Z (USAJM. The size distribution of various particles inthe 3-100 micron range was studied using a counter which operates bythe volumuetric displacement of an electrolyte in an electrical @enwingzonle. The particle size distribution is affected by its compatibilitywith the electrolyte solution, and technique used to prepare the par-ticles for sampling. Data obtained for size distribution was comparedwith data obtained by microscopic scanning, and from manufacturer'sspecifications.
Analyses of aluminum powder, coke flour, and hydraulic oil, aswell as the calibration sample ragweed pollen are given.
Results show that the electrical sensing-zone counter can be usedto give size distributions of a large number of 3-100 micron size par-ticles with a good degree of accuracy, repeatability and epeed.
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TABLE OF CONTENTS
ABSTRACT. ....................................
INTRODUCTION ................................ I
THEORETICAL BACKGROUND AND INSTRUMENTATION .... 2
CALIBRATION AND CALCULATIONS. ....................... 3
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(5avoer eM*Wbeum~t of 00 boly of e6ee and haeing 0"Wh~elan, mew be entmeed ohmn as... ovelell"Hto abs etegd)11 OmGIN4ATING ACTIVITY (Cwevoeset uawq) 20. REPORT SECURITY C LASSIPIICATi@N
Department of the Air Force UnclassifiedAFSC, RTD al.IMUAir Force Rocket Propulsion Lab., Edwards, Cal. bORU
S. mePOPIT TITLE
Particle Size Distribution by Electrical Sensing-Zone Counter
4L DESCRIPTIVE NOT"S (Ippe of epeut Mmd iWAU01ei doe.)
Final Report; August 1964 - June 196511- AUTHOR(S) (Last na& me. neowmm. imida
Stone, Charles M., Lt. USAF
S. REPORT DATE70TOANOOFPGM 76N.O grNovember 1966 23 OA O O AE 5 Non P eP
11& OTRACT OR GRANT POO. III ORISINHATORS1 REPORT MUMSER()
66 PROJECT NO. 3148 AFRPL-TR-66-300
,a. 3.NPORT MO(S) (Any oegaInn uia mny be 4.Eppv
106 AVAILANILITY/1,1IUTATION NOTICES
This document is subject to special export controls and each transmittal toforeign governments or foreign nationals may be made only with prior approvalof AFRPL (RPPR-STINFO), Edwards, California 93523.
Air Force Rocket Propulsion Laboratory,Edwards, California 93523
13. AUSTRACT
The objective of this study was to evaluate a method for the quality controlof fine powders as an alternate method to that specified in AvfL-P-2?412 (USAF).The size distribution of various particles in the 3-100 micron range was studiedusing a counter which operates by the volumetric displacement of an electrolytein an electrical sensing zone. The particle size distribution is affected by itscompatibility with the electrolyte solution, and technique used to prepare the par.ticles for sampling. Data obtained for size distribution was compared with dataobtained by microscopic scanning, and from manufacturer's specifications.
Analyses of aluminum powder, coke flour, and hydraulic oil, as well as thecalibration sample ragweed pollen are given.
Results show that the electrical sensing-zone counter can be used to givesize distributions of a large number of 3-100 micron size particles with a gooddegree of accuracy, repeatability and speed.
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FParticle SizingMeasuring micron particlesAluminum powder quality control
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